US20110024646A1 - Ultraviolet irradiation water treatment apparatus - Google Patents
Ultraviolet irradiation water treatment apparatus Download PDFInfo
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- US20110024646A1 US20110024646A1 US12/900,706 US90070610A US2011024646A1 US 20110024646 A1 US20110024646 A1 US 20110024646A1 US 90070610 A US90070610 A US 90070610A US 2011024646 A1 US2011024646 A1 US 2011024646A1
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- treatment apparatus
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- water treatment
- ultraviolet
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3227—Units with two or more lamps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/324—Lamp cleaning installations, e.g. brushes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/328—Having flow diverters (baffles)
Definitions
- the present invention relates to an ultraviolet irradiation water treatment apparatus which irradiates water with an ultraviolet ray to inactivate or detoxify algae, microbes, pathogenic protozoa, and the like in a water-purifying treatment, a sewage treatment, a food effluent treatment, a chemical effluent treatment, a deep-sea vessel ballast water treatment, and the like, for example, and to an ultraviolet irradiation water treatment apparatus of high ultraviolet irradiation efficiency.
- ultraviolet disinfection in which water is irradiated with an ultraviolet ray
- an ultraviolet ray is now replacing the conventional chlorination method.
- disadvantageously complicated chemical injection control is not required, and no toxic by-products such as trihalomethane are not generated.
- Ultraviolet disinfection is also highly effective at suppressing the proliferation of cryptosporidium, which reduces infectability thereof. Therefore, sometimes an ultraviolet irradiation treatment is performed to oxidize and disinfect residue organics at water purification works.
- the raw water is irradiated with an ultraviolet ray in order to improve the aggregation or to eliminate the infectability of pathogenic protozoa such as cryptosporidium. That is, the raw water is irradiated with an ultraviolet ray instead of use of prechlorination.
- Ultraviolet irradiation also effectively prevents the reproduction of algae, which is desired in the water-purifying treatment.
- ultraviolet irradiation is used to kill pathogenic microbes or protozoa
- ultraviolet in the wavelength range of 200 nm to 300 nm which is called the UV-C band
- a low-pressure or medium-pressure mercury lamp in which mercury vapor is enclosed in a lamp is used to generate a UV-C band ultraviolet ray.
- An apparatus in which one or plural ultraviolet lamps are disposed in parallel is well known as an apparatus for irradiating water with an ultraviolet ray (see “ULTRAVIOLET DISINFECTION GUIDANCE MANUAL”, United States Environmental Protection Agency, June 2003, Draft).
- the ultraviolet irradiation dose necessary to inactivate pathogenic protozoa, microbes, and virus, which are disinfection targets depends on the microbial species in question. Therefore, it is necessary for the water containing the pathogenic protozoa, bacteria, and virus, which are the disinfection targets, to be effectively irradiated with an ultraviolet ray within the period of time the water is present in the ultraviolet irradiation water treatment apparatus.
- Jpn. Pat. Appln. KOKAI Publication No. 9-503160 discloses a method in which a spiral guide vane is disposed in order that the water flows while swirling in an outer periphery of the ultraviolet lamp
- Jpn. Pat. Appln. KOKAI Publication Nos. 2004-512905 and 2001-516637 disclose a method in which a secondary flow, such as a vortex flow, is induced such that the whole body of water passes near the ultraviolet lamp.
- the configuration shown in FIG. 41 can be cited as an example of a conventional ultraviolet irradiation water treatment apparatus 100 .
- water W 1 enters from a water inlet pipe 102 located in a lower portion of a cylindrical vessel 101 , and the water W 1 rises in an axial direction of the vessel 101 . Then, the water W 1 flows out from a water outlet pipe 103 located in an upper portion of the vessel 101 .
- An ultraviolet lamp 105 surrounded by a protective tube 104 is disposed along a central axis of the cylindrical vessel 101 .
- a spiral guide vane 106 is disposed in the vessel 101 .
- the water W 1 flows while swirling around the ultraviolet lamp 105 along the spiral guide vane 106 . Therefore, the whole body of water W 1 can evenly be irradiated with the ultraviolet ray.
- FIG. 42 can be cited as another example of a conventional ultraviolet irradiation water treatment apparatus, 100 S.
- the same components as those in FIG. 41 are designated by the same numerals, and an overlapping description is omitted.
- the water W 1 flows in from the water inlet pipe 102 formed in the lower portion of the cylindrical vessel 101 , and the water W 1 rises in the axial direction of the vessel 101 . Then, the water W 1 flows out from the water outlet pipe 103 formed in the upper portion of the vessel 101 .
- the ultraviolet lamp 105 surrounded by the protective tube 104 is disposed in the central axis of the cylindrical vessel 101 .
- a spiral flow path 110 having a semicircular shape in section is formed in an inner wall surface of the cylindrical vessel 101 so as to surround the ultraviolet lamp 105 . That is, in the ultraviolet irradiation water treatment apparatus 100 S having the configuration shown in FIG.
- the water W 1 flows in from the water inlet pipe 102 , and the water W 1 passes through the spiral flow path 110 .
- This enables the water W 1 to flow while swirling in the outer periphery of the ultraviolet lamp 105 . Therefore, the whole body of water W 1 can evenly be irradiated with an ultraviolet ray.
- the spiral flow path 110 has a semicircular shape in section, a vortex flow is induced as a secondary flow of the fluid. Therefore, the water W 1 passes near the ultraviolet lamp 105 , and the water W 1 can efficiently be irradiated with an ultraviolet ray.
- Crystal quartz or synthetic quartz is used as a material for the protective tube which is disposed to protect the ultraviolet lamp.
- the crystal quartz or synthetic quartz glass tube is highly fragile, and easily breaks if subjected to slight impact. Therefore, in the case where an ultraviolet lamp is broken, unfortunately, mercury enclosed in the ultraviolet lamp leaks into the water, or fragments of the quartz glass tube constituting the ultraviolet lamp and protective tube are mixed into the water.
- an ultraviolet irradiation water treatment apparatus which causes water to flow in, performs an ultraviolet ray irradiation treatment, and causes treated water to flow out
- the apparatus main body includes a vessel having a cylindrical side portion, an inside of the vessel includes: a plurality of rod-shaped ultraviolet lamps which are disposed in parallel with a central axis of the side portion; and a plurality of protective tubes which are separately disposed to protect each ultraviolet lamp so as to surround each ultraviolet lamp
- an outer wall of the vessel includes: a water inlet pipe which is provided in a tangential direction of an inner periphery of the side portion to cause the water to flow in; and a water outlet pipe which causes the treated water to flow out.
- FIG. 1 is a side view showing an ultraviolet irradiation water treatment apparatus 10 according to a first embodiment of the invention.
- FIG. 2 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 according to the first embodiment.
- FIG. 3 is a view showing a concept of a swirling flow of water W 1 according to the first embodiment.
- FIG. 4 is a plan view showing a state, in which a position of a water inlet pipe 22 according to the first embodiment is formed, is changed.
- FIG. 5 is a view showing a concept of an illumination distribution in a vessel 20 when an ultraviolet lamp according to the first embodiment is turned off.
- FIG. 6 is a side view showing an ultraviolet irradiation water treatment apparatus 10 A according to the first embodiment.
- FIG. 7 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 A according to the first embodiment.
- FIG. 8 is a side view showing an ultraviolet irradiation water treatment apparatus 10 B according to a second embodiment of the invention.
- FIG. 9 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 B according to the second embodiment.
- FIG. 10 is a side view showing an ultraviolet irradiation water treatment apparatus 10 C according to the second embodiment.
- FIG. 11 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 C according to the second embodiment.
- FIG. 12 is a side view showing an ultraviolet irradiation water treatment apparatus 10 D according to a third embodiment of the invention.
- FIG. 13 is a view showing a flow F when water W 1 according to the third embodiment swirls.
- FIG. 14 is a view showing a concept of velocity distribution in a circumferential direction when the water W 1 according to the third embodiment swirls.
- FIG. 15A is a view for explaining an effect of a contaminant trap container 70 according to the third embodiment.
- FIG. 15B is a view for explaining an effect of the contaminant trap container 70 according to the third embodiment.
- FIG. 16 is a schematic view showing installation sites of ultraviolet lamps 30 A and 30 F of an ultraviolet irradiation water treatment apparatus 10 E according to a fourth embodiment of the invention.
- FIG. 17 is a view showing a comparative example of the installation sites of the ultraviolet lamps 30 A and 30 F according to the fourth embodiment.
- FIG. 18 is a schematic view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 F according to a fifth embodiment of the invention.
- FIG. 19 is a schematic view showing a configuration of a cleaning apparatus 90 according to the fifth embodiment.
- FIG. 20 is a schematic view showing a configuration of a cleaning component 91 according to the fifth embodiment.
- FIG. 21 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 G according to a sixth embodiment of the invention.
- FIG. 22 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 G according to the sixth embodiment.
- FIG. 23 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 H according to a seventh embodiment of the invention.
- FIG. 24 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 H according to the seventh embodiment.
- FIG. 25 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 I according to an eighth embodiment of the invention.
- FIG. 26 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 I according to the eighth embodiment.
- FIG. 27 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 J according to a ninth embodiment of the invention.
- FIG. 28 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 J according to the ninth embodiment.
- FIG. 29 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 K according to a tenth embodiment of the invention.
- FIG. 30 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 K according to the tenth embodiment.
- FIG. 31 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 L according to an eleventh embodiment of the invention.
- FIG. 32 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 L according to the eleventh embodiment.
- FIG. 33 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 M according to a twelfth embodiment of the invention.
- FIG. 34 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 M according to the twelfth embodiment.
- FIG. 35 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 N according to a thirteenth embodiment of the invention.
- FIG. 36 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 N according to the thirteenth embodiment.
- FIG. 37 is a view showing a flow of the water W 1 in the ultraviolet irradiation water treatment apparatus 10 K.
- FIG. 38 is a view showing a flow of the water W 1 in the ultraviolet irradiation water treatment apparatus 10 N according to the thirteenth embodiment.
- FIG. 39 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 P according to a fourteenth embodiment of the invention.
- FIG. 40 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 P according to the fourteenth embodiment.
- FIG. 41 is a view showing a configuration of a conventional ultraviolet irradiation water treatment apparatus 100 .
- FIG. 42 is a view showing a configuration of another conventional ultraviolet irradiation water treatment apparatus 100 S.
- FIG. 1 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 according to a first embodiment of the invention
- FIG. 2 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 .
- water W 1 is caused to flow in, the water W 1 is irradiated with the ultraviolet ray, and the treated water W 2 is caused to flow out.
- a vessel 20 of the ultraviolet irradiation water treatment apparatus 10 includes a cylindrical side portion 21 .
- a water inlet pipe 22 and a water outlet pipe 23 are provided in an outer wall of the vessel 20 .
- End faces 24 A and 24 B are provided in both end portions of the vessel 20 .
- the water inlet pipe 22 is provided in a tangential direction T of an inner periphery of the side portion 21 to cause the water W 1 to flow in.
- the water outlet pipe 23 is provided in the vessel 20 to cause the treated water W 2 to flow out.
- the water outlet pipe 23 is disposed in an outer wall of the side portion 21 along a flow direction of the water W 1 flowing from the water inlet pipe 22 . More particularly, the water outlet pipe 23 is provided in the tangential direction of the inner periphery of the side portion 21 .
- the water inlet pipe 22 and the water outlet pipe 23 are disposed in end portions 21 A and 21 B which are different from each other in the side portion 21 .
- the water inlet pipe 22 and the water outlet pipe 23 are connected to the vessel 20 with the central axes of the water inlet pipe 22 and water outlet pipe 23 apart from each other.
- Inner diameters of the water inlet pipe 22 and water outlet pipe 23 are not more than a half of an inner diameter of the side portion 21 .
- Ultraviolet lamps 30 A to 30 F and protective tubes 31 A to 31 F are disposed inside the vessel 20 .
- the ultraviolet lamps 30 A to 30 F are disposed in parallel with a central axis S of the side portion 21 .
- the ultraviolet lamps 30 A to 30 F are disposed in end surfaces 24 A and 24 B, and the ultraviolet lamps 30 A to 30 F are provided at equal intervals on a circumference around the central axis S.
- a quartz tube rod in which electrodes are attached to both ends is formed in a U-shape and used as the ultraviolet lamp.
- the inside of the quartz tube is in a substantial vacuum state and only mercury vapor is present in the quartz tube. When a high voltage is applied between the electrodes of the quartz tube to generate a discharge, electrons excite the mercury vapor to emit an ultraviolet ray.
- an ultraviolet lamp which emits an ultraviolet ray having a wavelength of 200 nm to 300 nm is used, but an ultraviolet lamp which emits an ultraviolet ray having a wavelength of 254 nm is more preferably used.
- the water W 1 is exposed to the ultraviolet ray to detoxify the disinfection target substance in the water.
- An ultraviolet lamp having a diameter of about 2 to about 10 cm is used.
- the protective tubes 31 A to 31 F protect the ultraviolet lamps 30 A to 30 F such that the water W 1 does not directly contact the ultraviolet lamps 30 A to 30 F. Therefore, the protective tubes 31 A to 31 F are separately disposed so as to surround each of the ultraviolet lamps 30 A to 30 F.
- the protective tubes 31 A to 31 F are made of quartz glass, and the protective tubes 31 A to 31 F are disposed in the end surfaces 24 A and 24 B.
- the water W 1 flows into the vessel 20 through the water inlet pipe 22 .
- the water inlet pipe 22 is formed in the tangential direction T of the inner periphery of the vessel 20 , the water W 1 flowing into the vessel 20 swirls (see FIG. 3 ).
- the water W 1 becomes such a swirling flow that flow velocity is increased on the side of an inner wall 21 W of the side portion 21 .
- the ultraviolet lamps 30 A to 30 F emit an ultraviolet ray having a wavelength near 254 nm.
- the ultraviolet ray having the wavelength near 254 nm acts as a disinfection ray to inactivate cryptosporidium of anti-chlorine microbes, fungi such as microbes and colibacillus, virus, and algae in the water. This enables the water W 1 to be disinfected.
- the water W 1 disinfected by the ultraviolet ray is discharged as the treated water W 2 from the water outlet pipe 23 . Then, the treated water W 2 is delivered to the next water-purifying process or directly supplied to a user.
- the water inlet pipe 22 is provided in the outer peripheral wall of the side portion 21 in the tangential direction T of the inner periphery of the side portion 21 , so that the water W 1 can swirl. Therefore, the water W 1 can flow while effectively contacting the ultraviolet lamps 30 A to 30 F, and the ultraviolet irradiation efficiency can be increased. In other words, the swirling flow is generated so that the whole of the water W 1 can efficiently be irradiated with the ultraviolet ray.
- the water W 1 has uneven flow in the connection portion between the vessel 20 and the water inlet pipe 22 and water outlet pipe 23 in the case where the water inlet pipe 22 and the water outlet pipe 23 are not formed in the tangential direction of the inner periphery of the vessel 20 , like a conventional ultraviolet irradiation water treatment apparatus 100 T whose plan view is shown in FIG. 4 .
- the water W 1 has a high flow rate, because most of the water W 1 flows more smoothly from the water inlet pipe 22 to the water outlet pipe 23 , the whole body of water W 1 cannot evenly be irradiated with the ultraviolet ray. Because a transit time (irradiation time) in the vessel 20 is decreased, a sufficient ultraviolet dose cannot be applied for the disinfection.
- the water W 1 does not flow smoothly, but has a swirling flow, so that the transit time can be lengthened.
- the ultraviolet dose (mJ/cm ⁇ 2>) is calculated by integration of the ultraviolet illumination (mW/cm ⁇ 2>) and irradiation time (sec).
- the ultraviolet irradiation water treatment apparatus 10 according to the first embodiment since the water W 1 is irradiated with the ultraviolet dose of 10 mJ/cm ⁇ 2> or more, the infectability of the cryptosporidium to human can be inactivated.
- the water W 1 can evenly be irradiated with the ultraviolet ray even if one of the ultraviolet lamps is broken.
- FIG. 5 shows the illumination distribution in the vessel 20 in the case where one ultraviolet lamp 30 F of the ultraviolet lamps 30 A to 30 F is turned off.
- the numeral L 1 designates a sufficient illumination region and the numeral L 2 designates an insufficient illumination region.
- FIG. 5 is a sectional view showing the side portion 21 of the vessel 20 .
- the water W 1 has a swirling flow, so that the water W 1 can sufficiently be irradiated with the other lit ultraviolet lamps 30 A to 30 E, and the disinfection can sufficiently be performed. That is, even if one ( 30 F) of the ultraviolet lamps is broken or turned off, the influence of the turned-off or broken ultraviolet lamp can be reduced.
- plural ultraviolet lamps 30 are disposed in parallel, and the water flows so as to contact all the ultraviolet lamps, which enhances the irradiation efficiency. Therefore, because the ultraviolet irradiation water treatment apparatus can be downsized, the apparatus is easily incorporated into existing facilities.
- the ultraviolet irradiation water treatment apparatus 10 is used for water-purifying treatment, this exerts a significant effect. This is because water-purifying treatment facilities are widely used in society at large. Therefore, there is a demand for such an ultraviolet irradiation water treatment apparatus that can be incorporated into the existing facilities and equipment. For example, in an ultraviolet irradiation water treatment apparatus including only one ultraviolet lamp, it is necessary to increase the total length of the apparatus.
- the ultraviolet irradiation water treatment apparatus 10 according to the first embodiment includes plural (six) ultraviolet lamps, so that the irradiation efficiency is increased several times (six times) for the same total length.
- FIGS. 6 and 7 are a side view and a plan view showing an example of an ultraviolet irradiation water treatment apparatus 10 A including the baffle 40 .
- the baffle 40 is provided in the inner wall 21 W of the side portion 21 such that a longitudinal direction of the baffle 40 runs parallel to the central axis S, whereby the swirling flow of the water W 1 can be weakened. This enables the flow to be increased in the central portion of the vessel 20 . Accordingly, the water W 1 can sufficiently be irradiated with an ultraviolet ray.
- the number of baffles 40 is not limited to one, and plural baffles 40 may be provided.
- the ultraviolet lamps 30 A to 30 F tend to make the flow smoother. Therefore, it is necessary that the number of baffles and a position, a size, and a shape of the baffle be determined in consideration of the flow rate of the water W 1 , and the diameter and position of the ultraviolet lamps, the diameter of the water inlet pipe 22 , and the position of the water outlet pipe 23 .
- FIG. 8 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 B according to a second embodiment of the invention
- FIG. 9 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 B.
- the same components as the first embodiment are designated by the same numerals, and an overlapping description is omitted unless otherwise needed. In the following embodiments subsequent to the second embodiment, overlapping descriptions are also omitted.
- a cleaning apparatus 50 is incorporated into the ultraviolet irradiation water treatment apparatus 10 A according to the first embodiment.
- the cleaning apparatus 50 includes a cleaning component 51 , a moving component 52 , a drive shaft 53 , and drive motor 54 .
- the cleaning component 51 scrapes the protective tubes 31 A to 31 F to wash out stains.
- a resin brush made of a fluorocarbon resin or the like which is not deteriorated by an ultraviolet ray, or a metal brush made of SUS can be used as the cleaning component 51 . More preferably, a stainless steel brush is used.
- a ring-shaped cleaning component may be used instead of the brush-shaped cleaning component 51 .
- an O-ring made of a fluorocarbon resin or the like can be used.
- a brush is used as the cleaning component 51
- bristles on the brush may break and sometimes fragments are mixed into the treated water W 2 . Therefore, it is necessary to perform membrane separation to remove the fragments in the next treatment process.
- an O-ring is used as the cleaning component 51 , the membrane separation process can be eliminated. Therefore, preferably an O-ring is used as the cleaning component 51 in the water-purifying treatment.
- the moving component 52 fixes the cleaning component 51 to the drive shaft 53 to support the cleaning component 51 , and the moving component 52 moves the cleaning component 51 along the drive shaft 53 according to rotation of the drive shaft 53 .
- the moving component 52 is attached to the cleaning component 51 , and the moving component 52 is connected to the drive shaft 53 with an external and internal thread structure.
- the drive shaft 53 is provided along the central axis S of the vessel 20 , and the rotation of the drive shaft 53 drives the moving component 52 along the central axis S. That is, the drive shaft 53 is connected to the moving component 52 with the external and internal thread structure, whereby the rotational energy of the drive shaft 53 is converted into the drive energy of the moving component 52 .
- the drive motor 54 is used to rotate the drive shaft 53 .
- the drive motor 54 can be drive-timed.
- the drive motor 54 can be set by a built-in timer so as to be driven every 15 minutes.
- the ultraviolet irradiation water treatment apparatus 10 B includes the cleaning apparatus 50 , so that disinfecting performance using ultraviolet irradiation can be maintained.
- the organic and inorganic matter dissolved in the water W 1 attach to the surfaces of the protective tubes 31 A to 31 F.
- the inorganic matter such as calcium
- solubility is lowered as water temperature increases. Therefore, when the protective tubes 31 A to 31 F are heated by heating the ultraviolet lamps 30 A to 30 F, calcium and the like are precipitated and attach to the surfaces of the protective tubes 31 A to 31 F.
- the calcium and the like attaching to the surfaces of the protective tubes 31 A to 31 F are called “stains”.
- the contaminated surfaces of the protective tubes 31 A to 31 F block the irradiation of the water W 1 with the ultraviolet ray, thereby lowering the disinfecting performance of the ultraviolet irradiation water treatment apparatus 10 B. In order to avoid the lowered disinfecting performance, it is necessary that the protective tubes 31 A to 31 F be cleaned several times a day.
- the protective tubes 31 A to 31 F are cleaned by physical cleaning in which the surface of the protective tube is scraped with a brush or cleaning ring. Therefore, because the surfaces of the protective tubes 31 A to 31 F are always cleaned, the disinfecting performance of the ultraviolet irradiation can be maintained. Chemical cleaning may also be used, which involves cleaning with chemicals.
- the attachment (stain) removed by the cleaning is discharged along with the treated water W 2 .
- the concentration of the removed attachment in the treated water be lower than a certain water quality criterion. The requirement can be met by increasing the cleaning frequency.
- FIGS. 10 and 11 are a side view and a plan view showing the ultraviolet irradiation water treatment apparatus 10 C.
- the ultraviolet irradiation water treatment apparatus 10 C includes not plural ultraviolet lamps but only one ultraviolet lamp. Even though the ultraviolet irradiation water treatment apparatus 10 C includes only one ultraviolet lamp, the water W 1 can be caused to swirl to enhance the ultraviolet irradiation efficiency.
- the drive shaft 53 of the cleaning apparatus 50 is disposed apart from the central axis S. Therefore, the same action and effect as the installation of the baffle 40 can be obtained in the case where the drive shaft 53 is disposed apart from the central axis S.
- FIG. 12 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 D according to a third embodiment of the invention.
- the vessel of the ultraviolet irradiation water treatment apparatus 10 according to the first embodiment is modified to include a contaminant recovery mechanism.
- the ultraviolet irradiation water treatment apparatus 10 D further includes a connection pipe 60 , a contaminant trap container 70 , and contaminant recovery piping 80 .
- the vessel 20 of the ultraviolet irradiation water treatment apparatus 10 D includes a reversely conical discharge portion 25 in the lower portion of the side portion 21 and a connection portion 26 below the discharge portion 25 .
- the water outlet pipe 23 is disposed along the central axis S.
- a lower end 23 L of the water outlet pipe 23 is disposed below lower ends of the ultraviolet lamps 31 A to 31 F.
- connection pipe 60 is used to connect the connection portion 26 of the vessel 20 and the contaminant trap container 70 .
- the contaminant trap container 70 is connected to the vessel 20 through the connection pipe 60 to accumulate the discharged water W 1 and a contaminant D contained in the water W 1 .
- the contaminant trap container 70 is disposed below the connection pipe 60 . Therefore, the connection pipe 60 can be inserted in and connected to the contaminant trap container 70 .
- the contaminant recovery piping 80 is used to recover the contaminant D accumulated in the contaminant trap container 70 .
- the contaminant D accumulated in the contaminant trap container 70 can be discharged by opening the contaminant recovery piping 80 on a recovery date and time.
- the water W 1 flows into the vessel 20 through the water inlet pipe 22 .
- the water W 1 flowing into the vessel 20 sequentially flows clockwise near the outer peripheries of the six ultraviolet lamps 30 A to 30 F arranged in the circumferential direction of the side portion 21 .
- FIG. 13 is a sectional view showing the side portion 21 which is a cylindrical portion.
- FIG. 14 is a view showing a velocity distribution in a flow direction of the ultraviolet lamp 30 A in a section taken on line 1 - 1 ′ of FIG. 13 .
- the water W 1 is irradiated with an ultraviolet ray while swirling in the vessel 20 .
- fragments of the quartz glass tube constituting the ultraviolet lamps 30 A to 30 F and protective tubes 31 A to 31 F are mixed into the water W 1 , or the mercury enclosed in the ultraviolet lamps 30 A to 30 F leaks into the water W 1 .
- the fragments of the quartz glass tube and the mercury become contaminant D of the water W 1 .
- the quartz glass tube In comparison with water, which has a specific gravity of 1, the quartz glass tube has a specific gravity of 2.2 and mercury has specific gravity of 13.5.
- the swirl of the water containing the quartz glass tube and mercury pushes the substance having a larger specific gravity to the outside in the swirling direction by a centrifugal separation action. That is, a centrifugal force is applied to the water by the swirling flow, and heavy substances are separated from the fluid flowing in the vessel 20 .
- the separated substances such as glass and mercury reach the inner wall 21 W of the side portion 21 , and the substances are collected downward along the inner wall 21 W by gravitation.
- the ultraviolet irradiation water treatment apparatus 10 D according to the third embodiment, even if the contaminant D is thoroughly mixed with the water W 1 , the contaminant D can surely be guided to the contaminant trap container 70 by the centrifugal separation action caused by the spiral swirling flow of the water W 1 and gravitation. Therefore, the treated water W 2 in which the contaminant D is mixed can be prevented from flowing out.
- the whole body of the water W 1 can efficiently be irradiated with an ultraviolet ray.
- the water W 1 can continuously be irradiated with an ultraviolet ray without interrupting the running of the apparatus.
- the ultraviolet irradiation water treatment apparatus 10 D comprises the contaminant trap container 70 in which the contaminant D can be tentatively accumulated, so that any breakage of the ultraviolet lamp and protective tube due to water-hammer action can be contained.
- the ultraviolet irradiation water treatment apparatus 10 D according to the third embodiment because the need for installing a recovery pond to recover the contaminant is eliminated, the structure of the water-purifying facilities and the like can be simplified. That is, in the ultraviolet irradiation water treatment apparatus 10 according to the first embodiment, as shown in FIG. 15(A) , a recovery pond 6 is required to recover the contaminant D between a catchment well 5 and an aggregation and sedimentation pond 7 .
- the recovery pond 6 includes a partition plate 6 A, and the contaminant D, which does not pass over the partition plate 6 A, collects at the bottom of the recovery pond 6 .
- FIG. 15(B) since the ultraviolet irradiation water treatment apparatus 10 D according to the third embodiment includes the contaminant trap container 70 in which the contaminant D can be tentatively accumulated, the need for installing a recovery pond 6 can be eliminated.
- FIG. 16 is a schematic view showing installation sites of ultraviolet lamps 30 A and 30 F of an ultraviolet irradiation water treatment apparatus 10 E according to a fourth embodiment of the invention.
- the ultraviolet irradiation water treatment apparatus 10 E according to the fourth embodiment differs from the first embodiment and second embodiment in the installation sites of the ultraviolet lamps 30 A to 30 F and protective tubes 31 A to 31 F.
- a first inner periphery C 1 is set around the central axis S and a second inner periphery C 2 is set inside the first inner periphery C 1 in the vessel 20
- the first ultraviolet lamps 31 A, 31 C, and 31 E are disposed at equal intervals on the first inner periphery C 1
- the second ultraviolet lamps 31 B, 31 D, and 31 F are disposed at equal intervals on the second inner periphery C 2 .
- the second ultraviolet lamps 31 B, 31 D, and 31 F are disposed in a certain angular configuration at midpoints between the first ultraviolet lamps 31 A, 31 C, and 31 E respectively.
- three ultraviolet lamps 30 A, 30 C, and 30 E are arranged at equal circumferential angles of 120° as an outer peripheral array.
- the remaining three ultraviolet lamps 30 B, 30 D, and 30 F are arranged at equal intervals as an inner peripheral array on an inner periphery of a smaller array radius than that of the outer peripheral array, and circumferential angles of the ultraviolet lamps 30 B, 30 D, and 30 F are shifted by 60°.
- FIG. 16 shows an array method when the six ultraviolet lamps 30 A to 30 F are arranged.
- the invention is not limited to the array method of FIG. 16 .
- the water W 1 flows into the vessel 20 through the water inlet pipe 22 .
- the water W 1 flowing into the vessel 20 flows downward along the central axis S while swirling in the vessel 20 .
- the water W 1 impinges on the first ultraviolet lamp 30 A in the outer peripheral array, and the water W 1 passes through the ultraviolet lamp 30 A while divided onto the side of the inner wall 21 W and onto the side of the inner periphery C 2 .
- the water W 1 sequentially flows around the second ultraviolet lamp 30 D in the inner peripheral array, the third ultraviolet lamp 30 E in the outer peripheral array, the third ultraviolet lamp 30 F in the inner peripheral array, and so on.
- the ultraviolet lamps are arrayed in the first inner periphery C 1 and the second inner periphery C 2 respectively. Therefore, a retention region where the flow stops between the ultraviolet lamps is not formed, which enables the water W 1 to flow securely.
- a retention region where the flow stops between the ultraviolet lamps is formed in the case where all the ultraviolet lamps 30 A to 30 F are arrayed on the same radius.
- a retention region R is formed at the back of the ultraviolet lamp 30 A along the swirling direction of the water W 1 . If a retention region is formed, the whole body of the water cannot be evenly irradiated with an ultraviolet ray.
- the ultraviolet irradiation water treatment apparatus 10 E according to the fourth embodiment compared with the ultraviolet irradiation water treatment apparatus in which the ultraviolet irradiation lamps are arranged on the same circumference, the whole body of the water can be evenly irradiated with an ultraviolet ray to enhance the ultraviolet irradiation efficiency.
- the ultraviolet irradiation treatment can continuously be performed without interrupting the running of the apparatus.
- FIG. 18 is a schematic view showing a configuration of an ultraviolet irradiation water treatment apparatus 1 OF according to a fifth embodiment of the invention.
- FIG. 19 is a schematic view showing a configuration of a cleaning apparatus 90 of the fifth embodiment.
- a cleaning apparatus 90 is incorporated into the ultraviolet irradiation water treatment apparatus 10 D according to the third embodiment.
- the cleaning apparatus 90 includes a cleaning component 91 , a moving component 92 , a drive shaft 93 , a drive motor 94 , and a gear-change mechanism 95 .
- the cleaning component 91 scrapes the protective tubes 31 A to 31 F to wash out a stain.
- the cleaning component 91 includes a first guide vane type cleaning plate 91 A, a second guide vane type cleaning plate 91 B, and a coupling component 91 C.
- the first guide vane type cleaning plate 91 A is a semicircular cleaning plate which is obliquely disposed such that the downstream side of the swirling flow of the water W 1 is located below the upstream side of the swirling flow.
- the first guide vane type cleaning plate 91 A includes three cleaning wipers 91 D to clean the protective tubes 31 A to 31 C.
- the second guide vane type cleaning plate 91 B is a semicircular cleaning plate which is coupled to the first guide vane type cleaning plate 91 A to form a circular shape and obliquely disposed to cause the water W 1 to further swirl.
- the second guide vane type cleaning plate 91 B is coupled so as to be located below the first guide vane type cleaning plate 91 A.
- the second guide vane type cleaning plate 91 B includes three cleaning wipers 91 D to clean the protective tubes 31 D to 31 F.
- the coupling component 91 C is used to couple the first guide vane type cleaning plate 91 A and the second guide vane type cleaning plate 91 B.
- the moving component 92 fixes the cleaning component 91 to the drive shaft 93 to support the cleaning component 91 , and the moving component 92 moves the cleaning component 91 along the drive shaft 93 according to the rotation of the drive shaft 93 .
- the moving component 92 is attached to the first guide vane type cleaning plate 91 A.
- the moving component 92 and the drive shaft 93 are connected to each other with an external and internal thread structure.
- the drive shaft 93 is provided along the central axis S of the vessel 20 , and the rotation of the drive shaft 93 drives the moving component 92 along the central axis S. Specifically, the thread is processed over the drive region of the drive shaft 93 , whereby the rotation of the drive shaft 93 vertically lifts the moving component 92 having the threaded inner surface.
- the drive shaft 93 and the moving component 92 are connected with the external and internal thread structure so that the rotational energy of the drive shaft 93 can be converted into the lifting energy of the moving component 92 .
- the drive motor 94 is used to rotate the drive shaft 93 .
- the drive motor 94 can be drive-timed.
- the drive motor 94 can be set by a built-in timer so as to be driven every 15 minutes.
- the gear-change mechanism 95 is used to change the rotation speed of the drive motor 94 .
- the cleaning apparatus 90 includes a guide component 96 , a guide rail 97 , fixing plates 98 A and 98 B, and bearings 99 A and 98 B other than the components in the above described configuration.
- the guide component 96 is used to latch the first guide vane type cleaning plate 91 A and second guide vane type cleaning plate 91 B in the guide rail 97 .
- the bearings 99 A and 99 B fix the guide rail 97 respectively to the fixing plates 98 A and 98 B provided in the upper and lower portions of the drive region.
- the drive motor 94 is driven to rotate the drive shaft 93 on a previously set date and time or as needed.
- the moving component 92 moves up and down along the central axis S of the vessel 20 according to the rotation of the drive shaft 93 .
- the moving component 92 is attached to the first guide vane type cleaning plate 91 A, and the first guide vane type cleaning plate 91 A and the second guide vane type cleaning plate 91 B are coupled by the coupling component 91 C. Therefore, the rotation of the drive shaft 93 vertically moves the whole cleaning component 91 .
- the cleaning wipers 91 D are moved while vertically scraping the surfaces of the protective tubes 31 A to 31 F. Therefore, the surfaces of the protective tubes 31 A to 31 F are cleaned.
- the cleaning wipers 91 D are moved while vertically scraping the surfaces of the protective tubes 31 A to 31 F, stains can be prevented from adhering to the surface of the protective tube.
- the components of stains of the protective tubes 31 A to 31 F include organic matter in the water and inorganic matter such as iron, manganese, and calcium.
- the cleaning component 91 includes the first guide vane type cleaning plate 91 A and the second guide vane type cleaning plate 91 B.
- the first guide vane type cleaning plate 91 A and the second guide vane type cleaning plate 91 B are obliquely disposed in the swirling direction of the swirling flow.
- the guide vane type cleaning plates 91 A and 91 B are inclined along the line of flow of the spiral swirling flow, so that an increase in flow resistance can be suppressed.
- the guide vane type cleaning plates 91 A and 91 B can act as a guide vane to restore the swirling flow.
- the cleaning apparatus 90 includes the guide vane type cleaning plates 91 A and 91 B, so that an increase in flow resistance can be suppressed in the region where the swirling flow becomes dominant while the swirling flow can be restored in the region where the flow rate in the axial direction becomes dominant. Additionally, stains can be prevented from adhering to the surface of the protective tube. Therefore, effective ultraviolet irradiation can continuously be performed.
- FIG. 21 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 G according to a sixth embodiment of the invention
- FIG. 22 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 G.
- the water W 1 is caused to flow in, the water W 1 is irradiated with the ultraviolet ray, and the treated water W 2 is caused to flow out.
- the ultraviolet lamps 30 A to 30 F and the protective tubes 31 A to 31 F are disposed in the vessel 20 of the ultraviolet irradiation water treatment apparatus 10 G.
- the contaminant trap container 70 and the contaminant recovery piping 80 are disposed below the vessel 20 .
- the vessel 20 of the ultraviolet irradiation water treatment apparatus 10 G includes the side portion 21 , the water inlet pipe 22 , the water outlet pipe 23 , the discharge portion 25 , the connection portion 26 , and a lid 27 .
- the side portion 21 includes a cylindrical outer wall and a cylindrical inner wall, and the water inlet pipe 22 is attached to the side portion 21 while a part of the outer wall and the inner wall are communicated such that water W 1 flows in the tangential direction of the inner periphery.
- the water inlet pipe 22 is provided in the tangential direction T of the inner periphery of the side portion 21 to cause the water W 1 to flow in.
- the water outlet pipe 23 is provided in the vessel 20 to cause the treated water W 2 to flow out.
- the water outlet pipe 23 is disposed on the central axis S of the side portion 21 while piercing through the lid 27 .
- the discharge portion 25 is provided at a lower end of the side portion 21 , and the discharge portion 25 is formed in a reversely truncated conical shape and has a decreased inner diameter at the lower end of the side portion 21 .
- connection portion 26 is connected to the contaminant trap container 70 .
- the connection portion 26 is provided at the lower end of the discharge portion 25 , and the connection portion 26 is formed in a cylindrical shape having the same inner diameter as that at the lower end of the discharge portion 25 .
- the lid 27 is a cover which covers the upper end of the side portion 21 in a watertight manner.
- the ultraviolet lamps 30 A to 30 F and the protective tubes 31 A to 31 F are disposed in the back surface of the lid 27 .
- the ultraviolet lamps 30 A to 30 F are disposed in parallel with the central axis S of the side portion 21 .
- the ultraviolet lamps 30 A to 30 F are disposed in the lid 27 , and the ultraviolet lamps 30 A to 30 F are provided at equal intervals on the circumference around the central axis S.
- a quartz tube rod in which the electrodes are attached to both ends is formed in a U-shape and used as the ultraviolet lamp.
- the protective tubes 31 A to 31 F are made of quartz glass such that the water W 1 does not directly contact the ultraviolet lamps 30 A to 30 F. In this case, the protective tubes 31 A to 31 F are separately disposed so as to surround each of the ultraviolet lamps 30 A to 30 F.
- the guide plate 41 is attached to a region where an angle formed between the inner wall of the side portion 21 and the inner wall of the water inlet pipe 22 is an acute angle. Specifically, the guide plate 41 is attached such that the interval with the inner wall is gradually increased from the inner peripheral line of the side portion 21 .
- the contaminant trap container 70 accumulates the water W 1 and the contaminant D contained in the water W 1 . Specifically, the contaminant trap container 70 is disposed below the vessel 20 , and the connection portion 26 is inserted into the contaminant trap container 70 . The contaminant trap container 70 accumulates the contaminant D which is contained in the water W 1 discharged from the connection portion 26 .
- the contaminant recovery piping 80 is used to recover the contaminant D accumulated in the contaminant trap container 70 .
- the contaminant D accumulated in the contaminant trap container 70 can be discharged by opening the contaminant recovery piping 80 on a recovery date and time.
- the water W 1 flows into the vessel 20 through the water inlet pipe 22 . At this point, the water W 1 is guided toward the inner wall direction of the vessel 20 by the guide plate 41 .
- the water W 1 flowing into the vessel 20 sequentially flows clockwise near the outer peripheries of the six ultraviolet lamps 30 A to 30 F arrayed in the circumferential direction of the side portion 21 .
- the water W 1 flows from the upper end to the lower end in the direction of the central axis S of the vessel 20 . That is, the water W 1 flows downward along the central axis S while swirling spirally in the vessel 20 .
- the flow F of the water W 1 during the swirl is expressed as shown in FIG. 22 .
- the swirling flow reaching the lower end of the discharge portion 25 becomes an upward flow to rise along the central axis S, and the upward flow is discharged from the water outlet pipe 23 .
- the water inlet pipe 22 is attached while a part of the outer wall and the inner wall are communicated such that the water W 1 flows in along the tangential direction T of the inner wall of the side portion 21 , so that the water W 1 can swirl. Accordingly, the water W 1 can flow while effectively contacting the ultraviolet lamps 30 A to 30 F, and the ultraviolet irradiation efficiency can be increased.
- the ultraviolet irradiation water treatment apparatus 10 G includes the guide plate 41 , the water W 1 can be guided toward the inner wall direction of the side portion 21 , which allows the direction of inflow dynamic pressure of the water W 1 to be converted into the swirling direction. Accordingly, a shearing force generated by the inflow dynamic pressure can be relaxed for the ultraviolet lamps 30 A and 30 F disposed near the entrance of the water inlet pipe 22 , and breakage of the ultraviolet lamp 30 and protective tube 31 can be prevented.
- the ultraviolet irradiation water treatment apparatus 10 G includes the vessel 20 having the reversely truncated conical discharge portion 25 and the contaminant trap container 70 . Therefore, even if the contaminant D is mixed into the water W 1 , the contaminant D can surely be guided to the contaminant trap container 70 by the centrifugal separation action caused by the spiral swirling flow of the water W 1 and gravity, and the treated water W 2 in which the contaminant D is mixed can be prevented from flowing out.
- FIG. 23 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 H according to a seventh embodiment of the invention
- FIG. 24 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 H.
- the vessel of the ultraviolet irradiation water treatment apparatus 10 D according to the third embodiment is modified.
- the vessel 20 includes an inflow portion 28 and a tapered portion 29 .
- the water inlet pipe 22 is attached not to the side portion 21 but to the inflow portion 28 .
- the inflow portion 28 includes a cylindrical outer wall and a cylindrical inner wall, and the water inlet pipe 22 is attached to the inflow portion 28 while a part of outer wall and the inner wall are communicated such that the water W 1 flows in the tangential direction T of the inner wall.
- the tapered portion 29 having the reversely truncated conical shape is provided at the lower end of the inflow portion 28 .
- the diameter of the inflow portion 28 is gradually decreased to the diameter of the side portion 21 . That is, the inner diameter at the upper end of the tapered portion 29 is equal to the inner diameter of the inflow portion 28 and the inner diameter at the lower end is equal to the inner diameter of the side portion 21 .
- the water W 1 flows into the vessel 20 through the water inlet pipe 22 .
- a swirling flow is effectively generated while the flow of the water W 1 is not blocked by the ultraviolet lamp 30 A.
- the water W 1 of the swirling flow swirls in the tapered portion 29 while being brought close to the ultraviolet lamps 30 A to 30 F. Then, the water W 1 flows to the lower end of the discharge portion 25 while swirling near the outer peripheries of the ultraviolet lamps 30 A to 30 F in the side portion 21 .
- the swirling flow reaching the lower end of the discharge portion 25 becomes the upward flow, the upward flow rises along the central axis S, and the upward flow is discharged from the water outlet pipe 23 .
- the ultraviolet irradiation water treatment apparatus 10 H includes the inflow portion 28 whose inner diameter is larger than the inner diameter of the side portion 21 , so that the contact between the water W 1 and the ultraviolet lamp 30 A can be reduced immediately after the water W 1 flows in the inflow portion 28 . Because there is no ultraviolet lamp 30 A in the inflow direction of the water W 1 , the swirling flow is effectively generated while the flow of the water W 1 is not blocked by the ultraviolet lamp 30 A.
- the distance between the ultraviolet lamp 30 and the swirling flow is gradually decreased in the tapered portion 29 , and the water W 1 swirls near the ultraviolet lamp 30 in the side portion 21 . Therefore, the ultraviolet irradiation effect can be enhanced.
- the shearing force generated by the inflow dynamic pressure can be relaxed for the ultraviolet lamp 30 A and protective tube 31 A near the entrance of the water inlet pipe 22 .
- FIG. 25 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 I according to an eighth embodiment of the invention
- FIG. 26 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 I.
- cover components 32 A to 32 F are added to the ultraviolet irradiation water treatment apparatus 10 H according to the seventh embodiment.
- the cover components 32 A to 32 F are used to protect the protective tubes 31 A to 31 F in the inflow portion 28 respectively, and the cover components 32 A to 32 F are made of a metal such as iron or stainless steel.
- the cover components 32 A to 32 F are disposed in the vessel side of the lid 27 .
- the ultraviolet irradiation water treatment apparatus 10 I includes the cover components 32 A to 32 F disposed in the outer peripheries of the protective tubes 31 A to 31 F, so that the direct action of the inflow dynamic pressure of the water W 1 on the protective tubes 31 A to 31 F can be relaxed. That is, because the inflow dynamic pressure of the water W 1 indicates a high value immediately after the water W 1 flows in the inflow portion 28 , sometimes it is necessary for the ultraviolet lamps 30 A to 30 F in the inflow portion 28 to be firmly protected rather than the protective tubes 31 A to 31 F made of quartz glass. In such cases, breakage of the ultraviolet lamps 30 A to 30 F and protective tubes 31 A to 31 F can be prevented by including the cover components 32 A to 32 F made of metal.
- FIG. 27 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 J according to a ninth embodiment of the invention
- FIG. 28 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 J.
- a cover skirt 33 is added to the ultraviolet irradiation water treatment apparatus 10 H according to the seventh embodiment.
- the cover skirt 33 is a cylindrical component which is disposed below the lid 27 so as to surround all the protective tubes 31 A to 31 F in the inflow portion 28 .
- the cover skirt 33 is made of a metal such as iron, aluminum, or stainless steel.
- a ring-shape flow path is formed by the outer peripheral surface of the cover skirt 33 and the inner wall of the inflow portion 28 . Therefore, compared with the ultraviolet irradiation water treatment apparatus 10 I in which the cover components 32 A to 32 F are separately attached to the protective tubes 31 A to 31 F, the water W 1 can be guided toward the inner wall direction of the inflow portion 28 , and the swirling flow can efficiently be generated.
- FIG. 29 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 K according to a tenth embodiment of the invention
- FIG. 30 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 K.
- a recess portion 27 H is added to the lid 27 of the ultraviolet irradiation water treatment apparatus 10 H according to the seventh embodiment.
- the recess portion 27 H recessed in a cylindrical shape so as to push down all the whole ultraviolet lamps 30 A to 30 F. In this case, the recess portion 27 H pushes down the lid 27 by a height of the inflow portion 28 .
- the heights of the ultraviolet lamps 30 A to 30 F can be decreased compared with the ultraviolet irradiation water treatment apparatus 10 J according to the ninth embodiment.
- the ring-shape flow path is formed by the outer peripheral surface of the recess portion 27 H and the inner wall of the inflow portion 28 , so that the swirling flow can efficiently be generated.
- a terminal box is disposed in the recess portion 27 H to accommodate connection terminals of electric wires through which electric power is supplied to the ultraviolet lamps 30 A to 30 F, whereby the height of the whole of the apparatus can be decreased.
- the decrease in height of the apparatus is a necessary factor in introducing the ultraviolet irradiation water treatment apparatus to existing water-purifying facilities.
- the irradiation efficiency of the ultraviolet lamps 30 A to 30 F can also be increased. More specifically, due to the presence of the emission portions of the ultraviolet lamps 30 A to 30 F from the tapered portion 29 to the side portion 21 , the treated fluid W 1 flows closer to the ultraviolet lamp compared with the case of the inflow portion 28 . Accordingly, the treated fluid W 1 is irradiated with a strong ultraviolet ray to enhance the irradiation efficiency.
- FIG. 31 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 L according to an eleventh embodiment of the invention
- FIG. 32 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 L.
- a first guide fin 42 and a second guide fin 43 are added to the ultraviolet irradiation water treatment apparatus 10 K according to the tenth embodiment.
- the first guide fin 42 is a downward spiral plate, and the first guide fin 42 is attached to the inner wall of the inflow portion 28 .
- the second guide fin 43 is a downward spiral plate, and the second guide fin 43 is attached to the outer wall of the recess portion 27 H.
- the water W 1 is guided to the first guide fin 42 and second guide fin 43 , and the water W 1 flows while swirling downward. That is, the swirling flow can efficiently be generated. Accordingly, even if the ultraviolet lamps 30 A to 30 F or the protective tubes 31 A to 31 F are broken, the fragments of the broken glass or the liquid mercury can be guided to the lowermost contaminant trap container 70 by the centrifugal separation action.
- a spiral pitch Po of the first guide fin 42 and a spiral pitch Pi of the second guide fin 43 are gradually narrowed in the flow direction, and an angle of lead of the first guide fin 42 may be larger than an angle of lead of the second guide fin 43 . Accordingly, because the swirling flow rate is accelerated in the flow direction, the centrifugal separation force can be improved.
- the “angle of lead” shall mean an angle formed by a tangent of the spiral line in the cylinder and a plane perpendicular to the axis.
- Both the first guide fin 42 and the second guide fin 43 are attached in the eleventh embodiment. However, the same effect is also obtained only by one of the first guide fin 42 and the second guide fin 43 . The same effect is obtained by a spiral guide fin, in which the first guide fin 42 and the second guide fin 43 , are integrally coupled. That is, a combination of the first guide fin 42 and the second guide fin 43 and a method of fixing the first guide fin 42 and the second guide fin 43 are not limited thereby.
- FIG. 33 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 M according to a twelfth embodiment of the invention
- FIG. 34 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 M.
- the ultraviolet irradiation water treatment apparatus 10 M includes a side portion 21 S having a reversely truncated conical shape instead of the cylindrical side portion 21 in the vessel 20 of the ultraviolet irradiation water treatment apparatus 10 K according to the tenth embodiment.
- the side portion 21 S is formed in the reversely truncated conical shape and a sectional area is gradually decreased toward the downward direction. Therefore, the flow rate is gradually accelerated in the swirling flow of the water W 1 . Accordingly, even if the contaminant D such as a glass fragment and mercury flows out due to the breakage of the ultraviolet lamps 30 A to 30 F or protective tubes 31 A to 31 F, the contaminant D can be recovered in the lower portion by the increased centrifugal separation force. That is, the recovery efficiency of the contaminant D can be increased.
- the height of the discharge portion 25 can be decreased. In this case, the height of the whole of the apparatus can be decreased.
- FIG. 35 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 N according to a thirteenth embodiment of the invention
- FIG. 36 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 N.
- the lower end 23 L of the water outlet pipe in the ultraviolet irradiation water treatment apparatus 10 K according to the tenth embodiment is disposed above the lower ends of the ultraviolet lamps 30 A to 30 F.
- the lower end 23 L of the water outlet pipe is at a height of half of each of the ultraviolet lamps 30 A to 30 F.
- FIG. 37 is a view showing a flow of the water W 1 in the ultraviolet irradiation water treatment apparatus 10 K
- FIG. 38 is a view showing a flow of the water W 1 in the ultraviolet irradiation water treatment apparatus 10 N.
- the retention region R (left in FIG. 37 ) is generated in a region on the inflow side of the water W 1 to decrease the ultraviolet irradiation efficiency.
- the lower end 23 L of the water outlet pipe is located above the lower ends of the ultraviolet lamps 30 A to 30 F, so that retention region R can be prevented from being generated in the side portion 21 . That is, the water W 1 can swirl efficiently in the whole region of the vessel 20 to enhance the ultraviolet irradiation efficiency.
- the upward flow going upward from the discharge portion 25 is also irradiated with the ultraviolet ray, so that the ultraviolet irradiation efficiency can be increased.
- FIG. 39 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10 P according to a fourteenth embodiment of the invention
- FIG. 40 is a plan view showing the ultraviolet irradiation water treatment apparatus 10 P.
- an outflow portion 45 and a water discharge pipe 46 are added to the ultraviolet irradiation water treatment apparatus 10 N according to the thirteenth embodiment.
- the cylindrical outflow portion 45 is provided below the cover skirt 27 in a watertight manner, and the outflow portion 45 is coupled to the water outlet pipe 23 in the bottom surface thereof.
- the water discharge pipe 46 is provided in the outer wall of the outflow portion 45 so as to pierce through the inflow portion 21 , and the water discharge pipe 46 is used to discharge the treated water W 2 from the water outlet pipe 23 .
- the discharge pipe 46 is attached in the direction orthogonal to the central axis S.
- the protective tubes 31 A to 31 F including the ultraviolet lamps 30 A to 30 F therein are covered with the cover components 32 A to 32 F, and the protective tubes 31 A to 31 F are fixed to an upper-end tube plate flange.
- the discharge pipe 46 can be attached in the direction orthogonal to the central axis S. Therefore, the height of the whole of the apparatus can be decreased. Therefore, a space in the upper portion of the apparatus is increased, and the ultraviolet lamps 30 A to 30 F are easily drawn out and exchanged when the ultraviolet lamps 30 A to 30 F have broken down.
Abstract
An ultraviolet irradiation water treatment apparatus includes a vessel having a cylindrical side portion, and plural rod-shaped ultraviolet lamps are disposed in parallel with a central axis of the side portion in the vessel. A water inlet pipe through which water flows into the vessel is provided in an outer wall of the side portion at a position in a tangential direction of an inner periphery of the side portion.
Description
- This is a Divisional Application of U.S. application Ser. No. 12/106,890, filed Apr. 21, 2008, now pending, which is a Continuation Application of PCT Application No. PCT/JP2006/322006, filed Nov. 2, 2006, which was published under PCT Article 21(2) in Japanese, which is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2005-319820, filed Nov. 2, 2005 and prior Japanese Patent Application No. 2006-068061, filed Mar. 13, 2006, the entire contents of all of which are incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates to an ultraviolet irradiation water treatment apparatus which irradiates water with an ultraviolet ray to inactivate or detoxify algae, microbes, pathogenic protozoa, and the like in a water-purifying treatment, a sewage treatment, a food effluent treatment, a chemical effluent treatment, a deep-sea vessel ballast water treatment, and the like, for example, and to an ultraviolet irradiation water treatment apparatus of high ultraviolet irradiation efficiency.
- 2. Description of the Related Art
- Conventionally, waterworks in Japan are managed based on sanitarian safety by chlorination.
- Recently, water system contamination problems have been generated by new and reconstructed pathogenic microbes such as cryptosporidium and Giardia. There are also the problems of mass generation of algae with the progress of eutrophication, which is organic matter pollution, in lakes, dams, and rivers, which are water service resources. The mass generation of algae causes an unusual odor and taste, discoloring, aggregation, sedimentation inhibition, filter clogging, and filtrate water leakage problems. Additionally, a chlorine agent injected for the purpose of disinfection reacts with the organic matter in raw water to produce toxic by-products such as trihalomethane.
- The improvement in management of a basic pattern in which the aggregation, filtration, and chlorination are sequentially performed is being studied to solve these problems for conventional waterworks in Japan.
- Specifically, use of ultraviolet disinfection, in which water is irradiated with an ultraviolet ray, is now replacing the conventional chlorination method. In ultraviolet disinfection, disadvantageously complicated chemical injection control is not required, and no toxic by-products such as trihalomethane are not generated. Ultraviolet disinfection is also highly effective at suppressing the proliferation of cryptosporidium, which reduces infectability thereof. Therefore, sometimes an ultraviolet irradiation treatment is performed to oxidize and disinfect residue organics at water purification works.
- In ultraviolet disinfection, usually, filtered water or aggregated and sedimented water is irradiated, as this provides high ultraviolet transmission efficiency. However, sometimes the raw water is irradiated with an ultraviolet ray in order to improve the aggregation or to eliminate the infectability of pathogenic protozoa such as cryptosporidium. That is, the raw water is irradiated with an ultraviolet ray instead of use of prechlorination.
- Ultraviolet irradiation also effectively prevents the reproduction of algae, which is desired in the water-purifying treatment.
- Where ultraviolet irradiation is used to kill pathogenic microbes or protozoa, ultraviolet in the wavelength range of 200 nm to 300 nm, which is called the UV-C band, is effective. A low-pressure or medium-pressure mercury lamp in which mercury vapor is enclosed in a lamp is used to generate a UV-C band ultraviolet ray.
- An apparatus in which one or plural ultraviolet lamps are disposed in parallel is well known as an apparatus for irradiating water with an ultraviolet ray (see “ULTRAVIOLET DISINFECTION GUIDANCE MANUAL”, United States Environmental Protection Agency, June 2003, Draft).
- However, the ultraviolet irradiation dose necessary to inactivate pathogenic protozoa, microbes, and virus, which are disinfection targets, depends on the microbial species in question. Therefore, it is necessary for the water containing the pathogenic protozoa, bacteria, and virus, which are the disinfection targets, to be effectively irradiated with an ultraviolet ray within the period of time the water is present in the ultraviolet irradiation water treatment apparatus.
- Since the intensity of an ultraviolet ray is decreased in inverse proportion to the square of the distance from the ultraviolet lamp, in order to effectively irradiate the water with the ultraviolet ray, it is necessary to cause the water to pass near the ultraviolet lamp.
- Therefore, Jpn. Pat. Appln. KOKAI Publication No. 9-503160 discloses a method in which a spiral guide vane is disposed in order that the water flows while swirling in an outer periphery of the ultraviolet lamp, and Jpn. Pat. Appln. KOKAI Publication Nos. 2004-512905 and 2001-516637 disclose a method in which a secondary flow, such as a vortex flow, is induced such that the whole body of water passes near the ultraviolet lamp.
- The configuration shown in
FIG. 41 can be cited as an example of a conventional ultraviolet irradiationwater treatment apparatus 100. - In the ultraviolet irradiation
water treatment apparatus 100, water W1 enters from awater inlet pipe 102 located in a lower portion of acylindrical vessel 101, and the water W1 rises in an axial direction of thevessel 101. Then, the water W1 flows out from awater outlet pipe 103 located in an upper portion of thevessel 101. Anultraviolet lamp 105 surrounded by aprotective tube 104 is disposed along a central axis of thecylindrical vessel 101. A spiral guide vane 106 is disposed in thevessel 101. In an ultraviolet irradiationwater treatment apparatus 100 having the above-described configuration, the water W1 flows while swirling around theultraviolet lamp 105 along thespiral guide vane 106. Therefore, the whole body of water W1 can evenly be irradiated with the ultraviolet ray. - The configuration shown in
FIG. 42 can be cited as another example of a conventional ultraviolet irradiation water treatment apparatus, 100S. InFIG. 42 , the same components as those inFIG. 41 are designated by the same numerals, and an overlapping description is omitted. - In the ultraviolet irradiation
water treatment apparatus 100S, the water W1 flows in from thewater inlet pipe 102 formed in the lower portion of thecylindrical vessel 101, and the water W1 rises in the axial direction of thevessel 101. Then, the water W1 flows out from thewater outlet pipe 103 formed in the upper portion of thevessel 101. Theultraviolet lamp 105 surrounded by theprotective tube 104 is disposed in the central axis of thecylindrical vessel 101. Aspiral flow path 110 having a semicircular shape in section is formed in an inner wall surface of thecylindrical vessel 101 so as to surround theultraviolet lamp 105. That is, in the ultraviolet irradiationwater treatment apparatus 100S having the configuration shown inFIG. 42 , the water W1 flows in from thewater inlet pipe 102, and the water W1 passes through thespiral flow path 110. This enables the water W1 to flow while swirling in the outer periphery of theultraviolet lamp 105. Therefore, the whole body of water W1 can evenly be irradiated with an ultraviolet ray. Because thespiral flow path 110 has a semicircular shape in section, a vortex flow is induced as a secondary flow of the fluid. Therefore, the water W1 passes near theultraviolet lamp 105, and the water W1 can efficiently be irradiated with an ultraviolet ray. - However, there are the following problems in the conventional ultraviolet irradiation water treatment apparatus.
- (A) In the case where plural ultraviolet lamps are used to treat a large amount of water, the structure of the apparatus necessarily becomes more complicated, which could increase the risk of failure. Additionally, the production cost is high since the apparatus has a complicated structure.
- (B) In order to treat a large amount of water, it has also been considered to dispose plural ultraviolet lamps in parallel with the direction in which the water flows. However, in the case where plural ultraviolet lamps are disposed, and one of the lamps has broken, the neighborhood of the broken ultraviolet lamp is insufficiently irradiated with ultraviolet rays, since the ultraviolet rays from the surrounding ultraviolet lamps are blocked by the broken ultraviolet lamp.
- (C) Crystal quartz or synthetic quartz is used as a material for the protective tube which is disposed to protect the ultraviolet lamp. The crystal quartz or synthetic quartz glass tube is highly fragile, and easily breaks if subjected to slight impact. Therefore, in the case where an ultraviolet lamp is broken, unfortunately, mercury enclosed in the ultraviolet lamp leaks into the water, or fragments of the quartz glass tube constituting the ultraviolet lamp and protective tube are mixed into the water.
- According to an aspect of the present invention, there is provided an ultraviolet irradiation water treatment apparatus which causes water to flow in, performs an ultraviolet ray irradiation treatment, and causes treated water to flow out, wherein the apparatus main body includes a vessel having a cylindrical side portion, an inside of the vessel includes: a plurality of rod-shaped ultraviolet lamps which are disposed in parallel with a central axis of the side portion; and a plurality of protective tubes which are separately disposed to protect each ultraviolet lamp so as to surround each ultraviolet lamp, and an outer wall of the vessel includes: a water inlet pipe which is provided in a tangential direction of an inner periphery of the side portion to cause the water to flow in; and a water outlet pipe which causes the treated water to flow out.
- Additional advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out hereinafter.
- The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.
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FIG. 1 is a side view showing an ultraviolet irradiationwater treatment apparatus 10 according to a first embodiment of the invention. -
FIG. 2 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10 according to the first embodiment. -
FIG. 3 is a view showing a concept of a swirling flow of water W1 according to the first embodiment. -
FIG. 4 is a plan view showing a state, in which a position of awater inlet pipe 22 according to the first embodiment is formed, is changed. -
FIG. 5 is a view showing a concept of an illumination distribution in avessel 20 when an ultraviolet lamp according to the first embodiment is turned off. -
FIG. 6 is a side view showing an ultraviolet irradiationwater treatment apparatus 10A according to the first embodiment. -
FIG. 7 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10A according to the first embodiment. -
FIG. 8 is a side view showing an ultraviolet irradiationwater treatment apparatus 10B according to a second embodiment of the invention. -
FIG. 9 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10B according to the second embodiment. -
FIG. 10 is a side view showing an ultraviolet irradiationwater treatment apparatus 10C according to the second embodiment. -
FIG. 11 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10C according to the second embodiment. -
FIG. 12 is a side view showing an ultraviolet irradiationwater treatment apparatus 10D according to a third embodiment of the invention. -
FIG. 13 is a view showing a flow F when water W1 according to the third embodiment swirls. -
FIG. 14 is a view showing a concept of velocity distribution in a circumferential direction when the water W1 according to the third embodiment swirls. -
FIG. 15A is a view for explaining an effect of acontaminant trap container 70 according to the third embodiment. -
FIG. 15B is a view for explaining an effect of thecontaminant trap container 70 according to the third embodiment. -
FIG. 16 is a schematic view showing installation sites ofultraviolet lamps water treatment apparatus 10E according to a fourth embodiment of the invention. -
FIG. 17 is a view showing a comparative example of the installation sites of theultraviolet lamps -
FIG. 18 is a schematic view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10F according to a fifth embodiment of the invention. -
FIG. 19 is a schematic view showing a configuration of acleaning apparatus 90 according to the fifth embodiment. -
FIG. 20 is a schematic view showing a configuration of acleaning component 91 according to the fifth embodiment. -
FIG. 21 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10G according to a sixth embodiment of the invention. -
FIG. 22 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10G according to the sixth embodiment. -
FIG. 23 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10H according to a seventh embodiment of the invention. -
FIG. 24 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10H according to the seventh embodiment. -
FIG. 25 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10I according to an eighth embodiment of the invention. -
FIG. 26 is a plan view showing the ultraviolet irradiation water treatment apparatus 10I according to the eighth embodiment. -
FIG. 27 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10J according to a ninth embodiment of the invention. -
FIG. 28 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10J according to the ninth embodiment. -
FIG. 29 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10K according to a tenth embodiment of the invention. -
FIG. 30 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10K according to the tenth embodiment. -
FIG. 31 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10L according to an eleventh embodiment of the invention. -
FIG. 32 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10L according to the eleventh embodiment. -
FIG. 33 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10M according to a twelfth embodiment of the invention. -
FIG. 34 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10M according to the twelfth embodiment. -
FIG. 35 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10N according to a thirteenth embodiment of the invention. -
FIG. 36 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10N according to the thirteenth embodiment. -
FIG. 37 is a view showing a flow of the water W1 in the ultraviolet irradiationwater treatment apparatus 10K. -
FIG. 38 is a view showing a flow of the water W1 in the ultraviolet irradiationwater treatment apparatus 10N according to the thirteenth embodiment. -
FIG. 39 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10P according to a fourteenth embodiment of the invention. -
FIG. 40 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10P according to the fourteenth embodiment. -
FIG. 41 is a view showing a configuration of a conventional ultraviolet irradiationwater treatment apparatus 100. -
FIG. 42 is a view showing a configuration of another conventional ultraviolet irradiationwater treatment apparatus 100S. - Embodiments of the present invention will be described, with reference to the accompanying drawings.
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FIG. 1 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10 according to a first embodiment of the invention, andFIG. 2 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10. - In the ultraviolet irradiation
water treatment apparatus 10, water W1 is caused to flow in, the water W1 is irradiated with the ultraviolet ray, and the treated water W2 is caused to flow out. - A
vessel 20 of the ultraviolet irradiationwater treatment apparatus 10 includes acylindrical side portion 21. - A
water inlet pipe 22 and awater outlet pipe 23 are provided in an outer wall of thevessel 20. End faces 24A and 24B are provided in both end portions of thevessel 20. - The
water inlet pipe 22 is provided in a tangential direction T of an inner periphery of theside portion 21 to cause the water W1 to flow in. - The
water outlet pipe 23 is provided in thevessel 20 to cause the treated water W2 to flow out. Thewater outlet pipe 23 is disposed in an outer wall of theside portion 21 along a flow direction of the water W1 flowing from thewater inlet pipe 22. More particularly, thewater outlet pipe 23 is provided in the tangential direction of the inner periphery of theside portion 21. - The
water inlet pipe 22 and thewater outlet pipe 23 are disposed inend portions side portion 21. In other words, thewater inlet pipe 22 and thewater outlet pipe 23 are connected to thevessel 20 with the central axes of thewater inlet pipe 22 andwater outlet pipe 23 apart from each other. Inner diameters of thewater inlet pipe 22 andwater outlet pipe 23 are not more than a half of an inner diameter of theside portion 21. -
Ultraviolet lamps 30A to 30F andprotective tubes 31A to 31F are disposed inside thevessel 20. - The
ultraviolet lamps 30A to 30F are disposed in parallel with a central axis S of theside portion 21. Theultraviolet lamps 30A to 30F are disposed inend surfaces ultraviolet lamps 30A to 30F are provided at equal intervals on a circumference around the central axis S. Specifically, a quartz tube rod in which electrodes are attached to both ends is formed in a U-shape and used as the ultraviolet lamp. The inside of the quartz tube is in a substantial vacuum state and only mercury vapor is present in the quartz tube. When a high voltage is applied between the electrodes of the quartz tube to generate a discharge, electrons excite the mercury vapor to emit an ultraviolet ray. - In the first embodiment, an ultraviolet lamp, which emits an ultraviolet ray having a wavelength of 200 nm to 300 nm is used, but an ultraviolet lamp which emits an ultraviolet ray having a wavelength of 254 nm is more preferably used. The water W1 is exposed to the ultraviolet ray to detoxify the disinfection target substance in the water. An ultraviolet lamp having a diameter of about 2 to about 10 cm is used.
- The
protective tubes 31A to 31F protect theultraviolet lamps 30A to 30F such that the water W1 does not directly contact theultraviolet lamps 30A to 30F. Therefore, theprotective tubes 31A to 31F are separately disposed so as to surround each of theultraviolet lamps 30A to 30F. Theprotective tubes 31A to 31F are made of quartz glass, and theprotective tubes 31A to 31F are disposed in the end surfaces 24A and 24B. - The action of the ultraviolet irradiation
water treatment apparatus 10 according to the first embodiment will be now described. - The water W1 flows into the
vessel 20 through thewater inlet pipe 22. At this point, because thewater inlet pipe 22 is formed in the tangential direction T of the inner periphery of thevessel 20, the water W1 flowing into thevessel 20 swirls (seeFIG. 3 ). - The water W1 becomes such a swirling flow that flow velocity is increased on the side of an
inner wall 21W of theside portion 21. At this point, theultraviolet lamps 30A to 30F emit an ultraviolet ray having a wavelength near 254 nm. The ultraviolet ray having the wavelength near 254 nm acts as a disinfection ray to inactivate cryptosporidium of anti-chlorine microbes, fungi such as microbes and colibacillus, virus, and algae in the water. This enables the water W1 to be disinfected. - The water W1 disinfected by the ultraviolet ray is discharged as the treated water W2 from the
water outlet pipe 23. Then, the treated water W2 is delivered to the next water-purifying process or directly supplied to a user. - As described above, according to the ultraviolet irradiation
water treatment apparatus 10 according to the first embodiment, thewater inlet pipe 22 is provided in the outer peripheral wall of theside portion 21 in the tangential direction T of the inner periphery of theside portion 21, so that the water W1 can swirl. Therefore, the water W1 can flow while effectively contacting theultraviolet lamps 30A to 30F, and the ultraviolet irradiation efficiency can be increased. In other words, the swirling flow is generated so that the whole of the water W1 can efficiently be irradiated with the ultraviolet ray. - That is, the water W1 has uneven flow in the connection portion between the
vessel 20 and thewater inlet pipe 22 andwater outlet pipe 23 in the case where thewater inlet pipe 22 and thewater outlet pipe 23 are not formed in the tangential direction of the inner periphery of thevessel 20, like a conventional ultraviolet irradiationwater treatment apparatus 100T whose plan view is shown inFIG. 4 . When the water W1 has a high flow rate, because most of the water W1 flows more smoothly from thewater inlet pipe 22 to thewater outlet pipe 23, the whole body of water W1 cannot evenly be irradiated with the ultraviolet ray. Because a transit time (irradiation time) in thevessel 20 is decreased, a sufficient ultraviolet dose cannot be applied for the disinfection. - On the contrary, in the ultraviolet irradiation
water treatment apparatus 10 according to the first embodiment, the water W1 does not flow smoothly, but has a swirling flow, so that the transit time can be lengthened. The ultraviolet dose (mJ/cm<2>) is calculated by integration of the ultraviolet illumination (mW/cm<2>) and irradiation time (sec). In the ultraviolet irradiationwater treatment apparatus 10 according to the first embodiment, since the water W1 is irradiated with the ultraviolet dose of 10 mJ/cm<2> or more, the infectability of the cryptosporidium to human can be inactivated. - In the ultraviolet irradiation
water treatment apparatus 10 according to the first embodiment, the water W1 can evenly be irradiated with the ultraviolet ray even if one of the ultraviolet lamps is broken. - That is, when at least one ultraviolet lamp is deteriorated or broken, because an output of the ultraviolet lamp is decreased, the illumination lacks around the ultraviolet lamp whose output is lowered, and insufficient disinfection is possibly performed. For example,
FIG. 5 shows the illumination distribution in thevessel 20 in the case where oneultraviolet lamp 30F of theultraviolet lamps 30A to 30F is turned off. InFIG. 5 , the numeral L1 designates a sufficient illumination region and the numeral L2 designates an insufficient illumination region.FIG. 5 is a sectional view showing theside portion 21 of thevessel 20. - On the contrary, in the ultraviolet irradiation
water treatment apparatus 10 according to the first embodiment, the water W1 has a swirling flow, so that the water W1 can sufficiently be irradiated with the other litultraviolet lamps 30A to 30E, and the disinfection can sufficiently be performed. That is, even if one (30F) of the ultraviolet lamps is broken or turned off, the influence of the turned-off or broken ultraviolet lamp can be reduced. - In the ultraviolet irradiation
water treatment apparatus 10 according to the first embodiment, plural ultraviolet lamps 30 are disposed in parallel, and the water flows so as to contact all the ultraviolet lamps, which enhances the irradiation efficiency. Therefore, because the ultraviolet irradiation water treatment apparatus can be downsized, the apparatus is easily incorporated into existing facilities. - Considering that the ultraviolet irradiation
water treatment apparatus 10 is used for water-purifying treatment, this exerts a significant effect. This is because water-purifying treatment facilities are widely used in society at large. Therefore, there is a demand for such an ultraviolet irradiation water treatment apparatus that can be incorporated into the existing facilities and equipment. For example, in an ultraviolet irradiation water treatment apparatus including only one ultraviolet lamp, it is necessary to increase the total length of the apparatus. On the other hand, the ultraviolet irradiationwater treatment apparatus 10 according to the first embodiment includes plural (six) ultraviolet lamps, so that the irradiation efficiency is increased several times (six times) for the same total length. - (Modification)
- Sometimes the water W1 can be irradiated more effectively with an ultraviolet ray by providing a
baffle 40 in the ultraviolet irradiationwater treatment apparatus 10 according to the first embodiment.FIGS. 6 and 7 are a side view and a plan view showing an example of an ultraviolet irradiationwater treatment apparatus 10A including thebaffle 40. - An effect of providing the
baffle 40 will be described below. - When the water W1 flowing from the
water inlet pipe 22 has a high flow rate, because the transit time of the water W1 in thevessel 20 is decreased, sometimes a sufficient ultraviolet dose is not obtained. Thebaffle 40 is provided in theinner wall 21W of theside portion 21 such that a longitudinal direction of thebaffle 40 runs parallel to the central axis S, whereby the swirling flow of the water W1 can be weakened. This enables the flow to be increased in the central portion of thevessel 20. Accordingly, the water W1 can sufficiently be irradiated with an ultraviolet ray. - The number of
baffles 40 is not limited to one, andplural baffles 40 may be provided. However, theultraviolet lamps 30A to 30F tend to make the flow smoother. Therefore, it is necessary that the number of baffles and a position, a size, and a shape of the baffle be determined in consideration of the flow rate of the water W1, and the diameter and position of the ultraviolet lamps, the diameter of thewater inlet pipe 22, and the position of thewater outlet pipe 23. -
FIG. 8 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10B according to a second embodiment of the invention, andFIG. 9 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10B. The same components as the first embodiment are designated by the same numerals, and an overlapping description is omitted unless otherwise needed. In the following embodiments subsequent to the second embodiment, overlapping descriptions are also omitted. - In the ultraviolet irradiation
water treatment apparatus 10B according to the second embodiment, a cleaning apparatus 50 is incorporated into the ultraviolet irradiationwater treatment apparatus 10A according to the first embodiment. - The cleaning apparatus 50 includes a
cleaning component 51, a movingcomponent 52, adrive shaft 53, and drivemotor 54. - The
cleaning component 51 scrapes theprotective tubes 31A to 31F to wash out stains. Specifically, a resin brush made of a fluorocarbon resin or the like which is not deteriorated by an ultraviolet ray, or a metal brush made of SUS can be used as thecleaning component 51. More preferably, a stainless steel brush is used. - A ring-shaped cleaning component may be used instead of the brush-shaped
cleaning component 51. Specifically, an O-ring made of a fluorocarbon resin or the like can be used. When a brush is used as thecleaning component 51, bristles on the brush may break and sometimes fragments are mixed into the treated water W2. Therefore, it is necessary to perform membrane separation to remove the fragments in the next treatment process. On the other hand, when an O-ring is used as thecleaning component 51, the membrane separation process can be eliminated. Therefore, preferably an O-ring is used as thecleaning component 51 in the water-purifying treatment. - The moving
component 52 fixes thecleaning component 51 to thedrive shaft 53 to support thecleaning component 51, and the movingcomponent 52 moves thecleaning component 51 along thedrive shaft 53 according to rotation of thedrive shaft 53. Specifically, the movingcomponent 52 is attached to thecleaning component 51, and the movingcomponent 52 is connected to thedrive shaft 53 with an external and internal thread structure. - The
drive shaft 53 is provided along the central axis S of thevessel 20, and the rotation of thedrive shaft 53 drives the movingcomponent 52 along the central axis S. That is, thedrive shaft 53 is connected to the movingcomponent 52 with the external and internal thread structure, whereby the rotational energy of thedrive shaft 53 is converted into the drive energy of the movingcomponent 52. - The
drive motor 54 is used to rotate thedrive shaft 53. Thedrive motor 54 can be drive-timed. For example, thedrive motor 54 can be set by a built-in timer so as to be driven every 15 minutes. - As described above, the ultraviolet irradiation
water treatment apparatus 10B includes the cleaning apparatus 50, so that disinfecting performance using ultraviolet irradiation can be maintained. - (Disinfecting Performance)
- An action of the cleaning apparatus 50 will be described next.
- The organic and inorganic matter dissolved in the water W1 attach to the surfaces of the
protective tubes 31A to 31F. Particularly, for the inorganic matter such as calcium, solubility is lowered as water temperature increases. Therefore, when theprotective tubes 31A to 31F are heated by heating theultraviolet lamps 30A to 30F, calcium and the like are precipitated and attach to the surfaces of theprotective tubes 31A to 31F. In this case, the calcium and the like attaching to the surfaces of theprotective tubes 31A to 31F are called “stains”. - The contaminated surfaces of the
protective tubes 31A to 31F block the irradiation of the water W1 with the ultraviolet ray, thereby lowering the disinfecting performance of the ultraviolet irradiationwater treatment apparatus 10B. In order to avoid the lowered disinfecting performance, it is necessary that theprotective tubes 31A to 31F be cleaned several times a day. - Therefore, in the ultraviolet irradiation
water treatment apparatus 10B according to the second embodiment, theprotective tubes 31A to 31F are cleaned by physical cleaning in which the surface of the protective tube is scraped with a brush or cleaning ring. Therefore, because the surfaces of theprotective tubes 31A to 31F are always cleaned, the disinfecting performance of the ultraviolet irradiation can be maintained. Chemical cleaning may also be used, which involves cleaning with chemicals. - The attachment (stain) removed by the cleaning is discharged along with the treated water W2. At this point, it is necessary that the concentration of the removed attachment in the treated water be lower than a certain water quality criterion. The requirement can be met by increasing the cleaning frequency.
- The ultraviolet irradiation efficiency can also be increased in the absence of plural ultraviolet lamps in the ultraviolet irradiation
water treatment apparatus 10B. Specifically, an ultraviolet irradiationwater treatment apparatus 10C can be cited.FIGS. 10 and 11 are a side view and a plan view showing the ultraviolet irradiationwater treatment apparatus 10C. - The ultraviolet irradiation
water treatment apparatus 10C includes not plural ultraviolet lamps but only one ultraviolet lamp. Even though the ultraviolet irradiationwater treatment apparatus 10C includes only one ultraviolet lamp, the water W1 can be caused to swirl to enhance the ultraviolet irradiation efficiency. - In the ultraviolet irradiation
water treatment apparatus 10C, because the ultraviolet lamp is disposed on the central axis S of thevessel 20, thedrive shaft 53 of the cleaning apparatus 50 is disposed apart from the central axis S. Therefore, the same action and effect as the installation of thebaffle 40 can be obtained in the case where thedrive shaft 53 is disposed apart from the central axis S. -
FIG. 12 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10D according to a third embodiment of the invention. - In the ultraviolet irradiation
water treatment apparatus 10D according to the third embodiment, the vessel of the ultraviolet irradiationwater treatment apparatus 10 according to the first embodiment is modified to include a contaminant recovery mechanism. Specifically, the ultraviolet irradiationwater treatment apparatus 10D further includes aconnection pipe 60, acontaminant trap container 70, and contaminant recovery piping 80. - The
vessel 20 of the ultraviolet irradiationwater treatment apparatus 10D includes a reverselyconical discharge portion 25 in the lower portion of theside portion 21 and aconnection portion 26 below thedischarge portion 25. - The
water outlet pipe 23 is disposed along the central axis S. Alower end 23L of thewater outlet pipe 23 is disposed below lower ends of theultraviolet lamps 31A to 31F. - The
connection pipe 60 is used to connect theconnection portion 26 of thevessel 20 and thecontaminant trap container 70. - The
contaminant trap container 70 is connected to thevessel 20 through theconnection pipe 60 to accumulate the discharged water W1 and a contaminant D contained in the water W1. Thecontaminant trap container 70 is disposed below theconnection pipe 60. Therefore, theconnection pipe 60 can be inserted in and connected to thecontaminant trap container 70. - The contaminant recovery piping 80 is used to recover the contaminant D accumulated in the
contaminant trap container 70. The contaminant D accumulated in thecontaminant trap container 70 can be discharged by opening the contaminant recovery piping 80 on a recovery date and time. - An action of the ultraviolet irradiation
water treatment apparatus 10D according to the third embodiment will be described below. - The water W1 flows into the
vessel 20 through thewater inlet pipe 22. - The water W1 flowing into the
vessel 20 sequentially flows clockwise near the outer peripheries of the sixultraviolet lamps 30A to 30F arranged in the circumferential direction of theside portion 21. - The water W1 flows efficiently from the upper end to the lower end in the central axis direction of the
vessel 20. That is, the water W1 flows downward along the central axis S while swirling spirally in thevessel 20. A flow F of the water W1 during the swirl is expressed, for example, as shown inFIG. 13 .FIG. 13 is a sectional view showing theside portion 21 which is a cylindrical portion.FIG. 14 is a view showing a velocity distribution in a flow direction of theultraviolet lamp 30A in a section taken on line 1-1′ ofFIG. 13 . - As described above, usually the water W1 is irradiated with an ultraviolet ray while swirling in the
vessel 20. - However, due to an accidental impact, sometimes the
protective tubes 31A to 31F are broken and therefore theultraviolet lamps 30A to 30F break. - In such cases, fragments of the quartz glass tube constituting the
ultraviolet lamps 30A to 30F andprotective tubes 31A to 31F are mixed into the water W1, or the mercury enclosed in theultraviolet lamps 30A to 30F leaks into the water W1. The fragments of the quartz glass tube and the mercury become contaminant D of the water W1. - In comparison with water, which has a specific gravity of 1, the quartz glass tube has a specific gravity of 2.2 and mercury has specific gravity of 13.5. The swirl of the water containing the quartz glass tube and mercury pushes the substance having a larger specific gravity to the outside in the swirling direction by a centrifugal separation action. That is, a centrifugal force is applied to the water by the swirling flow, and heavy substances are separated from the fluid flowing in the
vessel 20. The separated substances such as glass and mercury reach theinner wall 21W of theside portion 21, and the substances are collected downward along theinner wall 21W by gravitation. - That is, in the ultraviolet irradiation
water treatment apparatus 10D according to the third embodiment, even if the contaminant D is thoroughly mixed with the water W1, the contaminant D can surely be guided to thecontaminant trap container 70 by the centrifugal separation action caused by the spiral swirling flow of the water W1 and gravitation. Therefore, the treated water W2 in which the contaminant D is mixed can be prevented from flowing out. - Thus, in the ultraviolet irradiation
water treatment apparatus 10D according to the third embodiment, the whole body of the water W1 can efficiently be irradiated with an ultraviolet ray. - Even if an ultraviolet lamp is broken due to an accidental impact, the contaminant is not mixed into the treated water W2, due to a centrifugal separation action, so that ultraviolet irradiation can be performed safely and surely.
- In the event that a part of the
ultraviolet lamps 30A to 30F is broken or turned off, because the water W1 flows near all theultraviolet lamps 30A to 30F, the water W1 can continuously be irradiated with an ultraviolet ray without interrupting the running of the apparatus. - Because the water-purifying facilities always run as a social infrastructure, the water W1 always flows into the ultraviolet irradiation water treatment apparatus. In the case where the water W1 always flows into the ultraviolet irradiation water treatment apparatus, an ultraviolet lamp and protective tube may break due to the water-hammer action if the contaminant recovery piping 80 is carelessly opened. The ultraviolet irradiation
water treatment apparatus 10D according to the third embodiment comprises thecontaminant trap container 70 in which the contaminant D can be tentatively accumulated, so that any breakage of the ultraviolet lamp and protective tube due to water-hammer action can be contained. - In the ultraviolet irradiation
water treatment apparatus 10D according to the third embodiment, because the need for installing a recovery pond to recover the contaminant is eliminated, the structure of the water-purifying facilities and the like can be simplified. That is, in the ultraviolet irradiationwater treatment apparatus 10 according to the first embodiment, as shown inFIG. 15(A) , arecovery pond 6 is required to recover the contaminant D between a catchment well 5 and an aggregation andsedimentation pond 7. Therecovery pond 6 includes apartition plate 6A, and the contaminant D, which does not pass over thepartition plate 6A, collects at the bottom of therecovery pond 6. On the other hand, as shown inFIG. 15(B) , since the ultraviolet irradiationwater treatment apparatus 10D according to the third embodiment includes thecontaminant trap container 70 in which the contaminant D can be tentatively accumulated, the need for installing arecovery pond 6 can be eliminated. -
FIG. 16 is a schematic view showing installation sites ofultraviolet lamps water treatment apparatus 10E according to a fourth embodiment of the invention. - The ultraviolet irradiation
water treatment apparatus 10E according to the fourth embodiment differs from the first embodiment and second embodiment in the installation sites of theultraviolet lamps 30A to 30F andprotective tubes 31A to 31F. - In the fourth embodiment, a first inner periphery C1 is set around the central axis S and a second inner periphery C2 is set inside the first inner periphery C1 in the
vessel 20, the firstultraviolet lamps ultraviolet lamps ultraviolet lamps ultraviolet lamps - In other words, three
ultraviolet lamps ultraviolet lamps ultraviolet lamps -
FIG. 16 shows an array method when the sixultraviolet lamps 30A to 30F are arranged. However the invention is not limited to the array method ofFIG. 16 . - An action of the ultraviolet irradiation
water treatment apparatus 10E according to the fourth embodiment will be described below. - The water W1 flows into the
vessel 20 through thewater inlet pipe 22. - The water W1 flowing into the
vessel 20 flows downward along the central axis S while swirling in thevessel 20. At this point, the water W1 impinges on the firstultraviolet lamp 30A in the outer peripheral array, and the water W1 passes through theultraviolet lamp 30A while divided onto the side of theinner wall 21W and onto the side of the inner periphery C2. - Then, water W1Ao flowing onto the side of the inner periphery C2 of the
ultraviolet lamp 30A impinges on the firstultraviolet lamp 30B in the inner peripheral array. Then, the water W1Ao passes through theultraviolet lamp 30B while divided onto the side of the outer periphery C1 and onto the side of the central axis S. - Then, water W1Bo flowing onto the side of the outer periphery C1 of the
ultraviolet lamp 30B and water W1Ai flowing onto the side of theinner wall 21W of the firstultraviolet lamp 30A in the outer peripheral array merge to impinge on the secondultraviolet lamp 30C in the outer peripheral array. - Then, similarly, the water W1 sequentially flows around the second
ultraviolet lamp 30D in the inner peripheral array, the thirdultraviolet lamp 30E in the outer peripheral array, the thirdultraviolet lamp 30F in the inner peripheral array, and so on. - Thus, in the ultraviolet irradiation
water treatment apparatus 10E according to the fourth embodiment, the ultraviolet lamps are arrayed in the first inner periphery C1 and the second inner periphery C2 respectively. Therefore, a retention region where the flow stops between the ultraviolet lamps is not formed, which enables the water W1 to flow securely. - That is, a retention region where the flow stops between the ultraviolet lamps is formed in the case where all the
ultraviolet lamps 30A to 30F are arrayed on the same radius. For example, inFIG. 17 , a retention region R is formed at the back of theultraviolet lamp 30A along the swirling direction of the water W1. If a retention region is formed, the whole body of the water cannot be evenly irradiated with an ultraviolet ray. In the ultraviolet irradiationwater treatment apparatus 10E according to the fourth embodiment, compared with the ultraviolet irradiation water treatment apparatus in which the ultraviolet irradiation lamps are arranged on the same circumference, the whole body of the water can be evenly irradiated with an ultraviolet ray to enhance the ultraviolet irradiation efficiency. - In the event that a part of the
ultraviolet lamps 30A to 30F is broken or turned off, because the water W1 flows near all theultraviolet lamps 30A to 30F, the ultraviolet irradiation treatment can continuously be performed without interrupting the running of the apparatus. -
FIG. 18 is a schematic view showing a configuration of an ultraviolet irradiation water treatment apparatus 1OF according to a fifth embodiment of the invention.FIG. 19 is a schematic view showing a configuration of acleaning apparatus 90 of the fifth embodiment. - In the ultraviolet irradiation
water treatment apparatus 10F according to the fifth embodiment, acleaning apparatus 90 is incorporated into the ultraviolet irradiationwater treatment apparatus 10D according to the third embodiment. - The
cleaning apparatus 90 includes acleaning component 91, a movingcomponent 92, adrive shaft 93, adrive motor 94, and a gear-change mechanism 95. - The
cleaning component 91 scrapes theprotective tubes 31A to 31F to wash out a stain. As shown inFIG. 20 , thecleaning component 91 includes a first guide vanetype cleaning plate 91A, a second guide vanetype cleaning plate 91B, and acoupling component 91C. - The first guide vane
type cleaning plate 91A is a semicircular cleaning plate which is obliquely disposed such that the downstream side of the swirling flow of the water W1 is located below the upstream side of the swirling flow. The first guide vanetype cleaning plate 91A includes threecleaning wipers 91D to clean theprotective tubes 31A to 31C. - The second guide vane
type cleaning plate 91B is a semicircular cleaning plate which is coupled to the first guide vanetype cleaning plate 91A to form a circular shape and obliquely disposed to cause the water W1 to further swirl. The second guide vanetype cleaning plate 91B is coupled so as to be located below the first guide vanetype cleaning plate 91A. The second guide vanetype cleaning plate 91B includes threecleaning wipers 91D to clean theprotective tubes 31D to 31F. - The
coupling component 91C is used to couple the first guide vanetype cleaning plate 91A and the second guide vanetype cleaning plate 91B. - The moving
component 92 fixes thecleaning component 91 to thedrive shaft 93 to support thecleaning component 91, and the movingcomponent 92 moves thecleaning component 91 along thedrive shaft 93 according to the rotation of thedrive shaft 93. The movingcomponent 92 is attached to the first guide vanetype cleaning plate 91A. The movingcomponent 92 and thedrive shaft 93 are connected to each other with an external and internal thread structure. - The
drive shaft 93 is provided along the central axis S of thevessel 20, and the rotation of thedrive shaft 93 drives the movingcomponent 92 along the central axis S. Specifically, the thread is processed over the drive region of thedrive shaft 93, whereby the rotation of thedrive shaft 93 vertically lifts the movingcomponent 92 having the threaded inner surface. In other words, thedrive shaft 93 and the movingcomponent 92 are connected with the external and internal thread structure so that the rotational energy of thedrive shaft 93 can be converted into the lifting energy of the movingcomponent 92. - The
drive motor 94 is used to rotate thedrive shaft 93. Thedrive motor 94 can be drive-timed. For example, thedrive motor 94 can be set by a built-in timer so as to be driven every 15 minutes. - The gear-
change mechanism 95 is used to change the rotation speed of thedrive motor 94. - In addition, the
cleaning apparatus 90 includes aguide component 96, aguide rail 97, fixingplates bearings guide component 96 is used to latch the first guide vanetype cleaning plate 91A and second guide vanetype cleaning plate 91B in theguide rail 97. Thebearings guide rail 97 respectively to the fixingplates - An action of the ultraviolet irradiation water treatment apparatus 1OF according to the fifth embodiment will be described below.
- The
drive motor 94 is driven to rotate thedrive shaft 93 on a previously set date and time or as needed. - Then, the moving
component 92 moves up and down along the central axis S of thevessel 20 according to the rotation of thedrive shaft 93. The movingcomponent 92 is attached to the first guide vanetype cleaning plate 91A, and the first guide vanetype cleaning plate 91A and the second guide vanetype cleaning plate 91B are coupled by thecoupling component 91C. Therefore, the rotation of thedrive shaft 93 vertically moves thewhole cleaning component 91. - When the
cleaning component 91 is vertically moved, thecleaning wipers 91D are moved while vertically scraping the surfaces of theprotective tubes 31A to 31F. Therefore, the surfaces of theprotective tubes 31A to 31F are cleaned. - Thus, in the ultraviolet irradiation water treatment apparatus 1OF according to the fifth embodiment, because the
cleaning wipers 91D are moved while vertically scraping the surfaces of theprotective tubes 31A to 31F, stains can be prevented from adhering to the surface of the protective tube. Examples of the components of stains of theprotective tubes 31A to 31F include organic matter in the water and inorganic matter such as iron, manganese, and calcium. - The
cleaning component 91 according to the fifth embodiment includes the first guide vanetype cleaning plate 91A and the second guide vanetype cleaning plate 91B. The first guide vanetype cleaning plate 91A and the second guide vanetype cleaning plate 91B are obliquely disposed in the swirling direction of the swirling flow. - Therefore, in the upper portion of the
side portion 21 of the ultraviolet irradiationwater treatment apparatus 10F, the guide vanetype cleaning plates - On the other hand, in the lower portion of the ultraviolet irradiation
water treatment apparatus 10F, sometimes the swirling force of the water W1 is weakened by the flow resistance in the upper portion to strengthen the flow rate in the axial direction. In such cases, the guide vanetype cleaning plates - That is, in the ultraviolet irradiation
water treatment apparatus 10F, thecleaning apparatus 90 includes the guide vanetype cleaning plates -
FIG. 21 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10G according to a sixth embodiment of the invention, andFIG. 22 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10G. - In the ultraviolet irradiation
water treatment apparatus 10G, the water W1 is caused to flow in, the water W1 is irradiated with the ultraviolet ray, and the treated water W2 is caused to flow out. - The
ultraviolet lamps 30A to 30F and theprotective tubes 31A to 31F are disposed in thevessel 20 of the ultraviolet irradiationwater treatment apparatus 10G. Thecontaminant trap container 70 and the contaminant recovery piping 80 are disposed below thevessel 20. - The
vessel 20 of the ultraviolet irradiationwater treatment apparatus 10G includes theside portion 21, thewater inlet pipe 22, thewater outlet pipe 23, thedischarge portion 25, theconnection portion 26, and alid 27. - The
side portion 21 includes a cylindrical outer wall and a cylindrical inner wall, and thewater inlet pipe 22 is attached to theside portion 21 while a part of the outer wall and the inner wall are communicated such that water W1 flows in the tangential direction of the inner periphery. - The
water inlet pipe 22 is provided in the tangential direction T of the inner periphery of theside portion 21 to cause the water W1 to flow in. - The
water outlet pipe 23 is provided in thevessel 20 to cause the treated water W2 to flow out. Thewater outlet pipe 23 is disposed on the central axis S of theside portion 21 while piercing through thelid 27. - The
discharge portion 25 is provided at a lower end of theside portion 21, and thedischarge portion 25 is formed in a reversely truncated conical shape and has a decreased inner diameter at the lower end of theside portion 21. - The
connection portion 26 is connected to thecontaminant trap container 70. Theconnection portion 26 is provided at the lower end of thedischarge portion 25, and theconnection portion 26 is formed in a cylindrical shape having the same inner diameter as that at the lower end of thedischarge portion 25. - The
lid 27 is a cover which covers the upper end of theside portion 21 in a watertight manner. Theultraviolet lamps 30A to 30F and theprotective tubes 31A to 31F are disposed in the back surface of thelid 27. - The
ultraviolet lamps 30A to 30F are disposed in parallel with the central axis S of theside portion 21. Theultraviolet lamps 30A to 30F are disposed in thelid 27, and theultraviolet lamps 30A to 30F are provided at equal intervals on the circumference around the central axis S. Specifically, a quartz tube rod in which the electrodes are attached to both ends is formed in a U-shape and used as the ultraviolet lamp. - The
protective tubes 31A to 31F are made of quartz glass such that the water W1 does not directly contact theultraviolet lamps 30A to 30F. In this case, theprotective tubes 31A to 31F are separately disposed so as to surround each of theultraviolet lamps 30A to 30F. - The
guide plate 41 is attached to a region where an angle formed between the inner wall of theside portion 21 and the inner wall of thewater inlet pipe 22 is an acute angle. Specifically, theguide plate 41 is attached such that the interval with the inner wall is gradually increased from the inner peripheral line of theside portion 21. - The
contaminant trap container 70 accumulates the water W1 and the contaminant D contained in the water W1. Specifically, thecontaminant trap container 70 is disposed below thevessel 20, and theconnection portion 26 is inserted into thecontaminant trap container 70. Thecontaminant trap container 70 accumulates the contaminant D which is contained in the water W1 discharged from theconnection portion 26. - The contaminant recovery piping 80 is used to recover the contaminant D accumulated in the
contaminant trap container 70. The contaminant D accumulated in thecontaminant trap container 70 can be discharged by opening the contaminant recovery piping 80 on a recovery date and time. - An action of the ultraviolet irradiation
water treatment apparatus 10G according to the sixth embodiment will be described below. - The water W1 flows into the
vessel 20 through thewater inlet pipe 22. At this point, the water W1 is guided toward the inner wall direction of thevessel 20 by theguide plate 41. - The water W1 flowing into the
vessel 20 sequentially flows clockwise near the outer peripheries of the sixultraviolet lamps 30A to 30F arrayed in the circumferential direction of theside portion 21. The water W1 flows from the upper end to the lower end in the direction of the central axis S of thevessel 20. That is, the water W1 flows downward along the central axis S while swirling spirally in thevessel 20. The flow F of the water W1 during the swirl is expressed as shown inFIG. 22 . - The swirling flow reaching the lower end of the
discharge portion 25 becomes an upward flow to rise along the central axis S, and the upward flow is discharged from thewater outlet pipe 23. - Thus, in the ultraviolet irradiation
water treatment apparatus 10G according to the sixth embodiment, thewater inlet pipe 22 is attached while a part of the outer wall and the inner wall are communicated such that the water W1 flows in along the tangential direction T of the inner wall of theside portion 21, so that the water W1 can swirl. Accordingly, the water W1 can flow while effectively contacting theultraviolet lamps 30A to 30F, and the ultraviolet irradiation efficiency can be increased. - Because the ultraviolet irradiation
water treatment apparatus 10G includes theguide plate 41, the water W1 can be guided toward the inner wall direction of theside portion 21, which allows the direction of inflow dynamic pressure of the water W1 to be converted into the swirling direction. Accordingly, a shearing force generated by the inflow dynamic pressure can be relaxed for theultraviolet lamps water inlet pipe 22, and breakage of the ultraviolet lamp 30 andprotective tube 31 can be prevented. - The ultraviolet irradiation
water treatment apparatus 10G includes thevessel 20 having the reversely truncatedconical discharge portion 25 and thecontaminant trap container 70. Therefore, even if the contaminant D is mixed into the water W1, the contaminant D can surely be guided to thecontaminant trap container 70 by the centrifugal separation action caused by the spiral swirling flow of the water W1 and gravity, and the treated water W2 in which the contaminant D is mixed can be prevented from flowing out. -
FIG. 23 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10H according to a seventh embodiment of the invention, andFIG. 24 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10H. - In the ultraviolet irradiation
water treatment apparatus 10H according to the seventh embodiment, the vessel of the ultraviolet irradiationwater treatment apparatus 10D according to the third embodiment is modified. Specifically, thevessel 20 includes aninflow portion 28 and a taperedportion 29. Thewater inlet pipe 22 is attached not to theside portion 21 but to theinflow portion 28. - The
inflow portion 28 includes a cylindrical outer wall and a cylindrical inner wall, and thewater inlet pipe 22 is attached to theinflow portion 28 while a part of outer wall and the inner wall are communicated such that the water W1 flows in the tangential direction T of the inner wall. - The tapered
portion 29 having the reversely truncated conical shape is provided at the lower end of theinflow portion 28. In the taperedportion 29, the diameter of theinflow portion 28 is gradually decreased to the diameter of theside portion 21. That is, the inner diameter at the upper end of the taperedportion 29 is equal to the inner diameter of theinflow portion 28 and the inner diameter at the lower end is equal to the inner diameter of theside portion 21. - An action of the ultraviolet irradiation
water treatment apparatus 10H according to the seventh embodiment will be described below. - The water W1 flows into the
vessel 20 through thewater inlet pipe 22. At this point, because there is noultraviolet lamp 30A in the inflow direction of the water W1, a swirling flow is effectively generated while the flow of the water W1 is not blocked by theultraviolet lamp 30A. - The water W1 of the swirling flow swirls in the tapered
portion 29 while being brought close to theultraviolet lamps 30A to 30F. Then, the water W1 flows to the lower end of thedischarge portion 25 while swirling near the outer peripheries of theultraviolet lamps 30A to 30F in theside portion 21. - The swirling flow reaching the lower end of the
discharge portion 25 becomes the upward flow, the upward flow rises along the central axis S, and the upward flow is discharged from thewater outlet pipe 23. - Thus, the ultraviolet irradiation
water treatment apparatus 10H according to the seventh embodiment includes theinflow portion 28 whose inner diameter is larger than the inner diameter of theside portion 21, so that the contact between the water W1 and theultraviolet lamp 30A can be reduced immediately after the water W1 flows in theinflow portion 28. Because there is noultraviolet lamp 30A in the inflow direction of the water W1, the swirling flow is effectively generated while the flow of the water W1 is not blocked by theultraviolet lamp 30A. - The distance between the ultraviolet lamp 30 and the swirling flow is gradually decreased in the tapered
portion 29, and the water W1 swirls near the ultraviolet lamp 30 in theside portion 21. Therefore, the ultraviolet irradiation effect can be enhanced. - Because the contact between the water W1 and the
ultraviolet lamp 30A is reduced immediately after the water W1 flows in theinflow portion 28, the shearing force generated by the inflow dynamic pressure can be relaxed for theultraviolet lamp 30A andprotective tube 31A near the entrance of thewater inlet pipe 22. -
FIG. 25 is a side view showing a configuration of an ultraviolet irradiation water treatment apparatus 10I according to an eighth embodiment of the invention, andFIG. 26 is a plan view showing the ultraviolet irradiation water treatment apparatus 10I. - In the ultraviolet irradiation water treatment apparatus 10I according to the eighth embodiment,
cover components 32A to 32F are added to the ultraviolet irradiationwater treatment apparatus 10H according to the seventh embodiment. - The
cover components 32A to 32F are used to protect theprotective tubes 31A to 31F in theinflow portion 28 respectively, and thecover components 32A to 32F are made of a metal such as iron or stainless steel. Thecover components 32A to 32F are disposed in the vessel side of thelid 27. - As described above, the ultraviolet irradiation water treatment apparatus 10I includes the
cover components 32A to 32F disposed in the outer peripheries of theprotective tubes 31A to 31F, so that the direct action of the inflow dynamic pressure of the water W1 on theprotective tubes 31A to 31F can be relaxed. That is, because the inflow dynamic pressure of the water W1 indicates a high value immediately after the water W1 flows in theinflow portion 28, sometimes it is necessary for theultraviolet lamps 30A to 30F in theinflow portion 28 to be firmly protected rather than theprotective tubes 31A to 31F made of quartz glass. In such cases, breakage of theultraviolet lamps 30A to 30F andprotective tubes 31A to 31F can be prevented by including thecover components 32A to 32F made of metal. -
FIG. 27 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10J according to a ninth embodiment of the invention, andFIG. 28 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10J. - In the ultraviolet irradiation
water treatment apparatus 10J according to the ninth embodiment, acover skirt 33 is added to the ultraviolet irradiationwater treatment apparatus 10H according to the seventh embodiment. - The
cover skirt 33 is a cylindrical component which is disposed below thelid 27 so as to surround all theprotective tubes 31A to 31F in theinflow portion 28. Thecover skirt 33 is made of a metal such as iron, aluminum, or stainless steel. - Therefore, similarly to the ultraviolet irradiation water treatment apparatus 10I according to the eighth embodiment, breakage of the
ultraviolet lamps 30A to 30F andprotective tubes 31A to 31F can be prevented. - Additionally, a ring-shape flow path is formed by the outer peripheral surface of the
cover skirt 33 and the inner wall of theinflow portion 28. Therefore, compared with the ultraviolet irradiation water treatment apparatus 10I in which thecover components 32A to 32F are separately attached to theprotective tubes 31A to 31F, the water W1 can be guided toward the inner wall direction of theinflow portion 28, and the swirling flow can efficiently be generated. -
FIG. 29 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10K according to a tenth embodiment of the invention, andFIG. 30 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10K. - In the ultraviolet irradiation
water treatment apparatus 10K according to the tenth embodiment, arecess portion 27H is added to thelid 27 of the ultraviolet irradiationwater treatment apparatus 10H according to the seventh embodiment. Therecess portion 27H recessed in a cylindrical shape so as to push down all the wholeultraviolet lamps 30A to 30F. In this case, therecess portion 27H pushes down thelid 27 by a height of theinflow portion 28. - In the ultraviolet irradiation
water treatment apparatus 10K according to the tenth embodiment having the above-described configuration, the heights of theultraviolet lamps 30A to 30F can be decreased compared with the ultraviolet irradiationwater treatment apparatus 10J according to the ninth embodiment. Similarly to the ultraviolet irradiationwater treatment apparatus 10J according to the ninth embodiment, the ring-shape flow path is formed by the outer peripheral surface of therecess portion 27H and the inner wall of theinflow portion 28, so that the swirling flow can efficiently be generated. - A terminal box is disposed in the
recess portion 27H to accommodate connection terminals of electric wires through which electric power is supplied to theultraviolet lamps 30A to 30F, whereby the height of the whole of the apparatus can be decreased. As described in the first embodiment, the decrease in height of the apparatus is a necessary factor in introducing the ultraviolet irradiation water treatment apparatus to existing water-purifying facilities. - The irradiation efficiency of the
ultraviolet lamps 30A to 30F can also be increased. More specifically, due to the presence of the emission portions of theultraviolet lamps 30A to 30F from the taperedportion 29 to theside portion 21, the treated fluid W1 flows closer to the ultraviolet lamp compared with the case of theinflow portion 28. Accordingly, the treated fluid W1 is irradiated with a strong ultraviolet ray to enhance the irradiation efficiency. -
FIG. 31 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10L according to an eleventh embodiment of the invention, andFIG. 32 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10L. - In the ultraviolet irradiation
water treatment apparatus 10L according to the eleventh embodiment, afirst guide fin 42 and asecond guide fin 43 are added to the ultraviolet irradiationwater treatment apparatus 10K according to the tenth embodiment. - The
first guide fin 42 is a downward spiral plate, and thefirst guide fin 42 is attached to the inner wall of theinflow portion 28. - The
second guide fin 43 is a downward spiral plate, and thesecond guide fin 43 is attached to the outer wall of therecess portion 27H. - In the above-described configuration, in the
inflow portion 28, the water W1 is guided to thefirst guide fin 42 andsecond guide fin 43, and the water W1 flows while swirling downward. That is, the swirling flow can efficiently be generated. Accordingly, even if theultraviolet lamps 30A to 30F or theprotective tubes 31A to 31F are broken, the fragments of the broken glass or the liquid mercury can be guided to the lowermostcontaminant trap container 70 by the centrifugal separation action. - Alternatively, a spiral pitch Po of the
first guide fin 42 and a spiral pitch Pi of thesecond guide fin 43 are gradually narrowed in the flow direction, and an angle of lead of thefirst guide fin 42 may be larger than an angle of lead of thesecond guide fin 43. Accordingly, because the swirling flow rate is accelerated in the flow direction, the centrifugal separation force can be improved. The “angle of lead” shall mean an angle formed by a tangent of the spiral line in the cylinder and a plane perpendicular to the axis. - Both the
first guide fin 42 and thesecond guide fin 43 are attached in the eleventh embodiment. However, the same effect is also obtained only by one of thefirst guide fin 42 and thesecond guide fin 43. The same effect is obtained by a spiral guide fin, in which thefirst guide fin 42 and thesecond guide fin 43, are integrally coupled. That is, a combination of thefirst guide fin 42 and thesecond guide fin 43 and a method of fixing thefirst guide fin 42 and thesecond guide fin 43 are not limited thereby. -
FIG. 33 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10M according to a twelfth embodiment of the invention, andFIG. 34 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10M. - The ultraviolet irradiation
water treatment apparatus 10M according to the twelfth embodiment includes aside portion 21S having a reversely truncated conical shape instead of thecylindrical side portion 21 in thevessel 20 of the ultraviolet irradiationwater treatment apparatus 10K according to the tenth embodiment. - As described above, the
side portion 21S is formed in the reversely truncated conical shape and a sectional area is gradually decreased toward the downward direction. Therefore, the flow rate is gradually accelerated in the swirling flow of the water W1. Accordingly, even if the contaminant D such as a glass fragment and mercury flows out due to the breakage of theultraviolet lamps 30A to 30F orprotective tubes 31A to 31F, the contaminant D can be recovered in the lower portion by the increased centrifugal separation force. That is, the recovery efficiency of the contaminant D can be increased. - In the case of no need for enhancing the recovery efficiency of the contaminant D, the height of the
discharge portion 25 can be decreased. In this case, the height of the whole of the apparatus can be decreased. -
FIG. 35 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10N according to a thirteenth embodiment of the invention, andFIG. 36 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10N. - In the ultraviolet irradiation
water treatment apparatus 10N according to the thirteenth embodiment, thelower end 23L of the water outlet pipe in the ultraviolet irradiationwater treatment apparatus 10K according to the tenth embodiment is disposed above the lower ends of theultraviolet lamps 30A to 30F. Specifically, thelower end 23L of the water outlet pipe is at a height of half of each of theultraviolet lamps 30A to 30F. - An action of the ultraviolet irradiation
water treatment apparatus 10N according to the thirteenth embodiment will be described below with reference toFIGS. 37 and 38 .FIG. 37 is a view showing a flow of the water W1 in the ultraviolet irradiationwater treatment apparatus 10K, andFIG. 38 is a view showing a flow of the water W1 in the ultraviolet irradiationwater treatment apparatus 10N. - As shown in
FIG. 37 , in the case where thelower end 23L of the water outlet pipe is located at the same height as the lower end of the ultraviolet lamp (lower end of the side portion 21) or below the lower end of the ultraviolet lamp, because thewater outlet pipe 23 becomes a shielding substance, the spiral angle (angle of lead) of the swirling flow is increased. Accordingly, the retention region R (left inFIG. 37 ) is generated in a region on the inflow side of the water W1 to decrease the ultraviolet irradiation efficiency. - On the other hand, as shown in
FIG. 38 , in the case where thelower end 23L of the water outlet pipe is located above the lower end of the ultraviolet lamp, because the swirling flow has a small spiral angle (angle of lead), a retention region R is not generated in theside portion 21. - Thus, in the ultraviolet irradiation
water treatment apparatus 10N according to the thirteenth embodiment, thelower end 23L of the water outlet pipe is located above the lower ends of theultraviolet lamps 30A to 30F, so that retention region R can be prevented from being generated in theside portion 21. That is, the water W1 can swirl efficiently in the whole region of thevessel 20 to enhance the ultraviolet irradiation efficiency. - Additionally, the upward flow going upward from the
discharge portion 25 is also irradiated with the ultraviolet ray, so that the ultraviolet irradiation efficiency can be increased. -
FIG. 39 is a side view showing a configuration of an ultraviolet irradiationwater treatment apparatus 10P according to a fourteenth embodiment of the invention, andFIG. 40 is a plan view showing the ultraviolet irradiationwater treatment apparatus 10P. - In the ultraviolet irradiation
water treatment apparatus 10P according to the fourteenth embodiment, anoutflow portion 45 and awater discharge pipe 46 are added to the ultraviolet irradiationwater treatment apparatus 10N according to the thirteenth embodiment. - The
cylindrical outflow portion 45 is provided below thecover skirt 27 in a watertight manner, and theoutflow portion 45 is coupled to thewater outlet pipe 23 in the bottom surface thereof. - The
water discharge pipe 46 is provided in the outer wall of theoutflow portion 45 so as to pierce through theinflow portion 21, and thewater discharge pipe 46 is used to discharge the treated water W2 from thewater outlet pipe 23. In this case, thedischarge pipe 46 is attached in the direction orthogonal to the central axis S. - The
protective tubes 31A to 31F including theultraviolet lamps 30A to 30F therein are covered with thecover components 32A to 32F, and theprotective tubes 31A to 31F are fixed to an upper-end tube plate flange. - Thus, in the ultraviolet irradiation
water treatment apparatus 10P according to the fourteenth embodiment, thedischarge pipe 46 can be attached in the direction orthogonal to the central axis S. Therefore, the height of the whole of the apparatus can be decreased. Therefore, a space in the upper portion of the apparatus is increased, and theultraviolet lamps 30A to 30F are easily drawn out and exchanged when theultraviolet lamps 30A to 30F have broken down. - Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.
Claims (14)
1. An ultraviolet irradiation water treatment apparatus comprising:
a vessel comprising a water inlet pipe, an inflow portion which has a cylindrical outer wall and a cylindrical inner wall, the water inlet pipe being provided at the side portion while the inner wall and a part of the outer wall are communicated such that a water is flowed into the vessel in a tangential direction of the inner wall, a reversely truncated conical tapered portion which is provided at a lower end of the inflow portion, a cylindrical side portion which is provided below the tapered portion, the side portion having an inner diameter portion identical to an inner diameter at the lower end of the tapered portion, a reversely truncated conical discharge portion which is provided at the lower end of the side portion, a lid which closes an upper end of the side portion, and a water outlet pipe which is provided on a central axis of the inflow portion;
rod-shaped ultraviolet lamps which are provided in the vessel and disposed in the lid along a central axis of the side portion; and
protective tubes which respectively surround the ultraviolet lamps.
2. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein the ultraviolet lamps are disposed in the lid at equal intervals on a circumference around the central axis.
3. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein the vessel includes:
a cylindrical connection portion which is located at a lower end of the discharge portion, the connection portion having an inner diameter identical to an inner diameter at the lower end of the discharge portion; and
a contaminant trap container which accumulates the water discharged from the connection portion and a contaminant contained in the water, the connection portion being inserted into the contaminant trap container.
4. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein the vessel includes a reversely truncated conical side portion instead of the cylindrical side portion.
5. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein a lower end of the water outlet pipe is located above a lower end of ultraviolet lamps.
6. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein a lower end of the water outlet pipe is located at a substantially half height position of ultraviolet lamps.
7. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein the inflow portion further includes a plurality of cover components which are disposed in the lid so as to respectively surround protective tubes.
8. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein an inner wall of the inflow portion further includes a downward spiral first guide fin.
9. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein the inflow portion further includes a cylindrical cover skirt which is disposed below the lid so as to surround all of said protective tubes.
10. The ultraviolet irradiation water treatment apparatus according to claim 1 , wherein the lid includes a recess portion which is recessed in a cylindrical shape so as to push down all of said ultraviolet lamps.
11. The ultraviolet irradiation water treatment apparatus according to claim 1 , comprising:
a cylindrical outflow portion which is provided below the lid in a watertight manner, a bottom surface of the outflow portion being coupled to the water outlet pipe; and
a water discharge pipe which is provided in an outer wall of the outflow portion while piercing through the inflow portion, the water discharge pipe discharging treated water from the water outlet pipe.
12. The ultraviolet irradiation water treatment apparatus according to claim 9 , wherein an outer wall of the cover skirt further includes a downward spiral second guide fin.
13. The ultraviolet irradiation water treatment apparatus according to claim 10 , wherein an outer wall of the recess portion further includes a downward spiral second guide fin.
14. The ultraviolet irradiation water treatment apparatus according to claim 12 , wherein an angle of lead of the first guide fin is larger than an angle of lead of the second guide fin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/900,706 US20110024646A1 (en) | 2005-11-02 | 2010-10-08 | Ultraviolet irradiation water treatment apparatus |
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
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JP2005319820 | 2005-11-02 | ||
JP2005-319820 | 2005-11-02 | ||
JP2006068061A JP2007144386A (en) | 2005-11-02 | 2006-03-13 | Ultraviolet irradiation water-treatment apparatus |
JP2006-068061 | 2006-03-13 | ||
PCT/JP2006/322006 WO2007052763A1 (en) | 2005-11-02 | 2006-11-02 | Ultraviolet irradiation water-treatment apparatus |
US12/106,890 US7838845B2 (en) | 2005-11-02 | 2008-04-21 | Ultraviolet irradiation water treatment apparatus |
US12/900,706 US20110024646A1 (en) | 2005-11-02 | 2010-10-08 | Ultraviolet irradiation water treatment apparatus |
Related Parent Applications (1)
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US12/106,890 Division US7838845B2 (en) | 2005-11-02 | 2008-04-21 | Ultraviolet irradiation water treatment apparatus |
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US20110024646A1 true US20110024646A1 (en) | 2011-02-03 |
Family
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US12/106,890 Expired - Fee Related US7838845B2 (en) | 2005-11-02 | 2008-04-21 | Ultraviolet irradiation water treatment apparatus |
US12/900,706 Abandoned US20110024646A1 (en) | 2005-11-02 | 2010-10-08 | Ultraviolet irradiation water treatment apparatus |
Family Applications Before (1)
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US12/106,890 Expired - Fee Related US7838845B2 (en) | 2005-11-02 | 2008-04-21 | Ultraviolet irradiation water treatment apparatus |
Country Status (5)
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US (2) | US7838845B2 (en) |
JP (1) | JP2007144386A (en) |
CN (1) | CN101300195B (en) |
CA (1) | CA2626517A1 (en) |
WO (1) | WO2007052763A1 (en) |
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Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3138708A (en) * | 1962-06-01 | 1964-06-23 | Ultra Dynamics Corp | Apparatus for ultraviolet irradiation of fluids |
US4043886A (en) * | 1976-03-15 | 1977-08-23 | Pennwalt Corporation | Photochemical reactor and irradiation process |
US5503800A (en) * | 1994-03-10 | 1996-04-02 | Uv Systems Technology, Inc. | Ultra-violet sterilizing system for waste water |
US5512253A (en) * | 1991-11-04 | 1996-04-30 | Woodbridge; Thomas C. | Irradiator apparatus |
US5528044A (en) * | 1995-04-28 | 1996-06-18 | Solar Kinetics, Inc. | Wiper assembly for ultraviolet-light reactor tubes |
US5675153A (en) * | 1993-10-06 | 1997-10-07 | Snowball; Malcolm Robert | UV apparatus for fluid treatment |
US5725757A (en) * | 1995-01-16 | 1998-03-10 | Otv Omnium De Traitements Et De Valorisation (Societe Anonyme) | Reactor for UV radiation for the treatment of liquids |
JP2000070928A (en) * | 1998-08-31 | 2000-03-07 | Shimada Denshi Kogyo Kk | Water purifier and hot water pool water purifying system using the purifier |
GB2352409A (en) * | 1999-07-27 | 2001-01-31 | Church Garry | Tangential flow separator with additional supply of liquid |
US6332981B1 (en) * | 1999-12-16 | 2001-12-25 | Walter Thomas Loyd | Ultra violet liquid purification system |
US20020096648A1 (en) * | 2000-11-13 | 2002-07-25 | Klaus Kaiser | Apparatus for irradiating liquids |
US20050040091A1 (en) * | 2002-01-09 | 2005-02-24 | Halvor Nilsen | Apparatus and method for separating and filtering particles and organisms from flowing liquids |
US6991655B2 (en) * | 2001-04-06 | 2006-01-31 | Orthometer A/S | Computer assisted insertion of an artificial hip joint |
JP2006088064A (en) * | 2004-09-24 | 2006-04-06 | Yoshito Nishioka | Cyclone device |
US20070045197A1 (en) * | 2005-07-06 | 2007-03-01 | Rochester Institute Of Technology | UV disinfection systems with tangential inlets and methods thereof |
US7217358B2 (en) * | 2002-04-30 | 2007-05-15 | Lionel Evans | Ultraviolet radiation treatment of unwanted microorganisms |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2563531Y2 (en) | 1989-01-18 | 1998-02-25 | 国際電気株式会社 | Thin radio |
JPH075909Y2 (en) * | 1989-07-05 | 1995-02-15 | 中野 浩二 | UV irradiation device cleaning mechanism |
JP2547081Y2 (en) * | 1990-09-12 | 1997-09-03 | 本田技研工業株式会社 | Processing liquid purifier |
JP2702378B2 (en) * | 1992-06-15 | 1998-01-21 | 株式会社デンソー | Water purification equipment |
WO1994002680A1 (en) * | 1992-07-24 | 1994-02-03 | Kamyr, Inc. | Hydrocyclone photo-reactor |
JP3019591U (en) | 1995-06-08 | 1995-12-19 | 株式会社セイカ | Reading glasses |
US6015229A (en) | 1997-09-19 | 2000-01-18 | Calgon Carbon Corporation | Method and apparatus for improved mixing in fluids |
CN1289150C (en) | 2000-11-13 | 2006-12-13 | 拜尔公司 | Method of inactivating microorganisms in a fluid using ultraviolet radiation |
JP2003024934A (en) * | 2001-07-18 | 2003-01-28 | Miyama Kk | Ultraviolet treatment apparatus an method for use thereof |
JP4516251B2 (en) * | 2001-11-07 | 2010-08-04 | 株式会社日本フォトサイエンス | Ultraviolet irradiation device and operation method thereof |
EP1371611B1 (en) * | 2002-06-13 | 2007-03-21 | Malcolm Robert Snowball | Fluid Treatment apparatus |
CN1206169C (en) * | 2002-09-30 | 2005-06-15 | 林宏 | Ultraviolet sterilizing purifier |
WO2004101162A1 (en) * | 2003-05-19 | 2004-11-25 | Ntu Ventures Private Limited | Method and apparatus for disinfecting fluids using electromagnetic radiation while undergoing separation |
-
2006
- 2006-03-13 JP JP2006068061A patent/JP2007144386A/en active Pending
- 2006-11-02 CA CA002626517A patent/CA2626517A1/en not_active Abandoned
- 2006-11-02 CN CN200680040977XA patent/CN101300195B/en not_active Expired - Fee Related
- 2006-11-02 WO PCT/JP2006/322006 patent/WO2007052763A1/en active Application Filing
-
2008
- 2008-04-21 US US12/106,890 patent/US7838845B2/en not_active Expired - Fee Related
-
2010
- 2010-10-08 US US12/900,706 patent/US20110024646A1/en not_active Abandoned
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3138708A (en) * | 1962-06-01 | 1964-06-23 | Ultra Dynamics Corp | Apparatus for ultraviolet irradiation of fluids |
US4043886A (en) * | 1976-03-15 | 1977-08-23 | Pennwalt Corporation | Photochemical reactor and irradiation process |
US5512253A (en) * | 1991-11-04 | 1996-04-30 | Woodbridge; Thomas C. | Irradiator apparatus |
US5675153A (en) * | 1993-10-06 | 1997-10-07 | Snowball; Malcolm Robert | UV apparatus for fluid treatment |
US5503800A (en) * | 1994-03-10 | 1996-04-02 | Uv Systems Technology, Inc. | Ultra-violet sterilizing system for waste water |
US5725757A (en) * | 1995-01-16 | 1998-03-10 | Otv Omnium De Traitements Et De Valorisation (Societe Anonyme) | Reactor for UV radiation for the treatment of liquids |
US5528044A (en) * | 1995-04-28 | 1996-06-18 | Solar Kinetics, Inc. | Wiper assembly for ultraviolet-light reactor tubes |
JP2000070928A (en) * | 1998-08-31 | 2000-03-07 | Shimada Denshi Kogyo Kk | Water purifier and hot water pool water purifying system using the purifier |
GB2352409A (en) * | 1999-07-27 | 2001-01-31 | Church Garry | Tangential flow separator with additional supply of liquid |
US6332981B1 (en) * | 1999-12-16 | 2001-12-25 | Walter Thomas Loyd | Ultra violet liquid purification system |
US20020096648A1 (en) * | 2000-11-13 | 2002-07-25 | Klaus Kaiser | Apparatus for irradiating liquids |
US6991655B2 (en) * | 2001-04-06 | 2006-01-31 | Orthometer A/S | Computer assisted insertion of an artificial hip joint |
US20050040091A1 (en) * | 2002-01-09 | 2005-02-24 | Halvor Nilsen | Apparatus and method for separating and filtering particles and organisms from flowing liquids |
US7217358B2 (en) * | 2002-04-30 | 2007-05-15 | Lionel Evans | Ultraviolet radiation treatment of unwanted microorganisms |
JP2006088064A (en) * | 2004-09-24 | 2006-04-06 | Yoshito Nishioka | Cyclone device |
US20070045197A1 (en) * | 2005-07-06 | 2007-03-01 | Rochester Institute Of Technology | UV disinfection systems with tangential inlets and methods thereof |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8710459B1 (en) * | 2013-04-23 | 2014-04-29 | Thomas W. Davis, III | UV liquid treatment system |
US10941054B2 (en) | 2014-08-28 | 2021-03-09 | Skf Marine Gmbh | Method and device for preparing a fluid loaded with ingredients |
US20180034756A1 (en) * | 2016-07-27 | 2018-02-01 | International Business Machines Corporation | Identifying and Splitting Participants into Sub-Groups in Multi-Person Dialogues |
US11834352B2 (en) | 2018-07-18 | 2023-12-05 | Lebaron Ip Holdings, Llc | System and method for treatment of a process fluid to inactivate undesirable organisms |
US11834353B2 (en) | 2019-07-31 | 2023-12-05 | Access Business Group International Llc | Water treatment system |
Also Published As
Publication number | Publication date |
---|---|
CN101300195B (en) | 2011-05-18 |
US20080203004A1 (en) | 2008-08-28 |
CN101300195A (en) | 2008-11-05 |
CA2626517A1 (en) | 2007-05-10 |
JP2007144386A (en) | 2007-06-14 |
WO2007052763A1 (en) | 2007-05-10 |
US7838845B2 (en) | 2010-11-23 |
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