CN102491489B - Open type multichannel visual photocatalytic oxidation teaching experimental device - Google Patents
Open type multichannel visual photocatalytic oxidation teaching experimental device Download PDFInfo
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- CN102491489B CN102491489B CN 201110399102 CN201110399102A CN102491489B CN 102491489 B CN102491489 B CN 102491489B CN 201110399102 CN201110399102 CN 201110399102 CN 201110399102 A CN201110399102 A CN 201110399102A CN 102491489 B CN102491489 B CN 102491489B
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Abstract
The invention relates to an open type multichannel visual photocatalytic oxidation teaching experimental device, which comprises a reactor, wherein a vertical light source and a gas circuit thrusting needle are arranged in the reactor; the light source is a light source with small power and low energy consumption, namely an ultraviolet-A (UV-A) light tube with the power of between 5 and 10 W; the UV-A light tube is sleeved in an annular tube, so that the light source is insolated from liquid in the reactor; the gas circuit thrusting needle is connected with a diaphragm air pump or an ozone generator; a rotor flowmeter is arranged on a connecting pipeline; the diaphragm air pump or the ozone generator is connected to a controller, and the light source is also connected to the controller; a suction tube is also arranged in the reactor and is connected to an external magnetic force liquid discharging pump to realize the experiment conversion of adding and extracting the liquid quickly; and the controller sets reaction time to complete the selection control of intermittent or period programs and methods. According to the open type multichannel visual photocatalytic oxidation teaching experimental device, the photocatalytic advanced oxidation method and principle can be mastered and analyzed by the design of a multiparameter open type and multichannel parallel visual device.
Description
Technical field
The invention belongs to teaching and the scientific research technical field of environmental chemistry and Materials science aspect, be specifically related to a kind of open type multichannel visual photocatalytic oxidation teaching experimental device.
Background technology
The degree of depth water treatment of photocatalytic semiconductor oxidation is one of the most green at present environment protection novel.The principle of its realization is that catalyzer is after the selective light irradiation, at catalyst surface generation light induced electron (e) and hole (h).And then, with water molecules and the further reaction such as dissolved oxygen around it, induce the super oxygen base (O of generation
2-) oxyradical such as hydroxyl (OH), these free radicals are very unstable, have the highest current potential, and oxidation capacity is extremely strong, the organic molecule oxygenolysis in the water can be become carbonic acid gas and water etc. to be called again mineralising and decompose, thereby reach the purpose that water purifies.
At present, photochemical catalysis is subject to extensive concern as a kind of new technology that has potential value.And existing device mostly is the closed operation under the high power strong ultraviolet lighting.Be subject to the use restrictions such as light source cools off, strong ultraviolet is burnt.The device that is suitable for education experiment not yet has and presents.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of open type multichannel visual photocatalytic oxidation teaching experimental device, take the experimental teaching requirement as purpose, the device for carrying out said of control efficient, low consumption is finished in the visible apparatus design of and multidiameter delay open by multiparameter under normal temperature, normal pressure.Thereby, realize the grasp of photocatalytic advanced oxidation method and principle is resolved.
To achieve these goals, the technical solution used in the present invention is:
A kind of open type multichannel visual photocatalytic oxidation teaching experimental device, comprise reactor 1, be provided with vertical light source 2 and gas circuit contact pin 3 in the reactor 1, gas circuit contact pin 3 is connected with barrier film pneumatic pump 10 or ozonizer 15, be provided with spinner-type flowmeter 13 on the connecting pipeline, barrier film pneumatic pump 10 or ozonizer 15 are connected to controller 4, light source 2 also is connected to controller 4, also be provided with suction pipe 9 in the reactor 1, suction pipe 9 is connected to external magnetic force draw-off pump 8 and realizes adding fast the experiment conversion of getting liquid, controller 4 is set the reaction times, finishes intermittently or period program and method selection control.
Described reactor 1 can walk abreast arrange four the road or other, select 500 milliliters graduated cylinder, vertically be fixed on the plate face 5 that the vertical section is inverted T-shaped with pipe clamp 11.
Described light source 2 is selected low power less energy-consumption light source, such as the UV-A light pipe of power between 5～10W, is inserted in sleeve pipe 14, and light source 2 and the liquid in the reactor 1 are isolated, and sleeve pipe 14 is glass bushing or quartz socket tube.
The present invention does light source according to the characteristics of experiment device for teaching design requirements with low heat emission, small power, need not condensation, has open, hyperchannel and visual characteristics.The present invention realizes open Experiment Design, to strengthen the understanding to photochemical catalytic oxidation experimental principle and correlationship thereof by the experiment effect ratio equity of parallel running simultaneously, the adjusting selecting of multiparameter, many conditions.And then, deepen understanding, grasp and application to this technology.
The research and development of this experiment device for teaching not only meet the requirement that Practice Teaching is introduced as early as possible to new technology, also are enriching of specialized education's teaching resources library integration.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is the structural representation that apparatus of the present invention four road walk abreast.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further details.
As shown in Figure 1, the present invention is a kind of open type multichannel visual photocatalytic oxidation teaching experimental device, comprise reactor 1, reactor 1 is selected 500 milliliters graduated cylinder, the volume of solution can be read by the liquid level scale 12 on the reactor 1, and reactor 1 usefulness pipe clamp 11 vertically is fixed on the plate face 5 that the vertical section is inverted T-shaped.Be provided with vertical light source 2 and gas circuit contact pin 3 in the reactor 1, light source 2 is selected low power less energy-consumption light source, such as the UV-A light pipe of power between 5～10W, is inserted in the sleeve pipe 14 of glass or quartzy material, and light source 2 and the liquid in the reactor 1 are isolated.Gas circuit contact pin 3 is connected with barrier film pneumatic pump 10 or ozonizer 15, be provided with spinner-type flowmeter 13 on the connecting pipeline, barrier film pneumatic pump 10 or ozonizer 15 are connected to controller 4, light source 2 also is connected to controller 4, also be provided with suction pipe 9 in the reactor 1, suction pipe 9 is connected to external magnetic force draw-off pump 8 and realizes adding fast the experiment conversion of getting liquid, and controller 4 is set the reaction times, finishes intermittently or period program and method selection control.
According to photon energy E=h/ λ formula (h constant, λ optical wavelength), the shorter photon energy of wavelength is higher.UV-A with photochemical effect, its chemical lines 365nm, photon energy 328KJ/mol.Select low power less energy-consumption light source, but the fitting operation of open type (optional window shade and the quartz socket tube of adding of UV-C) is suitable for the naked eyes direct-view.Illuminator is contained in glass or the quartz socket tube, puts into reactor 1, and the reaction intensity of illumination of generation is 10W/0.4L.The unlatching of light source 2 and pneumatic stirring can link, and set execution by time controller.
Gas circuit can select air or ozone to pass into the reaction solution bottom with contact pin, realizes the pneumatic type mixing.The gas that passes into that is produced by surge pump mixes the stirring reaction solution on the one hand, provides enough light induced electron acceptors to photocatalysis oxidation reaction simultaneously.Suppress the compound of hole-electronics.After oxygen molecule is accepted electronics, form superoxide radical or hydroxyl radical free radical with extremely strong oxidation capacity, it has decisive role to photocatalysis oxidation reaction speed.In addition, ozone has stronger oxidisability than oxygen, is combined with photochemical catalysis can produce and the synergism of usefulness.Other establishes spinner-type flowmeter and is used for the amount of adjustments of gas.
As shown in Figure 2, the more options four tunnel parallel reactor that arranges 1 combinations namely become multi-channel system, also can select according to practical application the way of needs.
The operation use procedure of this open type multichannel visual photocatalytic oxidation teaching experimental device is as follows:
(1) operation steps: (for example: titanium dioxide) place reactor 1, and add target contaminant and water to required volume, such as the 500ml scale marks take by weighing an amount of catalyzer.Set the reaction times at controller 4, check that gas circuit contact pin 3 in the reactor 1 is connected with light source and the connection at each place such as sleeve pipe 14 intact.Starting switch 6 and power supply 7, system namely carries out continuously or intermittent reaction according to the setting of controller 4.This moment, reaction solution was mixed through pneumatic, and target contaminant is sustained reaction under photocatalysis, the whole process visible observation.
(2) experiment relatively: the experimental project of selection can be the analogy of photocatalytic reaction conditions and target contaminant thereof.Reaction conditions has the single channel experiment of single factor, comprising: the parameters such as illumination selection, wavelength, catalyzer (absorption), stirring gas.Final definite, only have catalyzer under the wavelength zone model irradiation of appointment, the catalytic oxidation of noble potential just occurs in the reaction solution of mixing.
Determining under the reaction conditions that target contaminant can be selected coloured indicator class dyestuff such as tropeolin-D, Viola crystallina etc., visual or carry out period sampling with visible spectrophotometer, analyze its degradation and decolorization rate.The also photochemical catalytic oxidations such as optional colourless N,N-DIMETHYLACETAMIDE, phenol organism, sampling are with ultraviolet spectrophotometer or stratographic analysis.Inquire into as deep oxidation, can further carry out the research of analysis of medium and mechanism of degradation thereof.
(3) parameter of experiment: the operational variable that this device provides comprises, light source (UV-A UV-C), and larger model provides the light intensity power ratio; Catalyst levels; Reactant concn; Reaction times; Stir gas and flow thereof; The experimental selection such as the pH of solution.
(4) after experiment is finished, slightly.Until catalyzer fall heavy after, with the magnetic force draw-off pump 8 of peripheral hardware and suction pipe 9 with the reaction solution sucking-off.Catalyzer keeps and Reusability.Be Preparatory work of experiment next time, with (1).
Like this, total system is open-sky technique under the condition of normal temperature and pressure, and realizes complete visual operation.
Claims (4)
1. open type multichannel visual photocatalytic oxidation teaching experimental device, comprise reactor (1), it is characterized in that, be provided with vertical light source (2) and gas circuit contact pin (3) in the reactor (1), gas circuit contact pin (3) is connected with barrier film pneumatic pump (10) or ozonizer (15), be provided with spinner-type flowmeter (13) on the connecting pipeline, barrier film pneumatic pump (10) or ozonizer (15) are connected to controller (4), light source (2) also is connected to controller (4), also be provided with suction pipe (9) in the reactor (1), suction pipe (9) is connected to external magnetic force draw-off pump (8) and realizes adding fast the experiment conversion of getting liquid, controller (4) is set the reaction times, finish intermittence or period program and method and select control, described reactor (1) is parallel to arrange four the tunnel, described light source (2) is inserted in sleeve pipe (14), and described sleeve pipe (14) is glass bushing or quartz socket tube.
2. open type multichannel visual photocatalytic oxidation teaching experimental device according to claim 1 is characterized in that, described reactor (1) is 500 milliliters graduated cylinder.
3. open type multichannel visual photocatalytic oxidation teaching experimental device according to claim 1 is characterized in that, described reactor (1) vertically is fixed on the plate face (5) that the vertical section is inverted T-shaped with pipe clamp (11).
4. open type multichannel visual photocatalytic oxidation teaching experimental device according to claim 1 is characterized in that, described light source (2) is the UV-A light pipe of power between 5～10W.
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| CN 201110399102 CN102491489B (en) | 2011-12-05 | 2011-12-05 | Open type multichannel visual photocatalytic oxidation teaching experimental device |
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| CN 201110399102 CN102491489B (en) | 2011-12-05 | 2011-12-05 | Open type multichannel visual photocatalytic oxidation teaching experimental device |
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| CN102491489A CN102491489A (en) | 2012-06-13 |
| CN102491489B true CN102491489B (en) | 2013-04-03 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5637231A (en) * | 1995-06-07 | 1997-06-10 | Huron Valley Technology, Inc. | Method and apparatus for using ozone in a pressure vessel to treat stream of pollutants |
| CN200949061Y (en) * | 2005-12-07 | 2007-09-19 | 广州威固环保设备有限公司 | Ozone-ultraviolet photocatalysis water-treating equipment |
| CN201716269U (en) * | 2010-06-10 | 2011-01-19 | 山东省科学院海洋仪器仪表研究所 | Device for determining chemiluminescence characteristics of solid particles oxidized by ozone |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006026194A (en) * | 2004-07-20 | 2006-02-02 | Yaskawa Electric Corp | Organic matter removing apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5637231A (en) * | 1995-06-07 | 1997-06-10 | Huron Valley Technology, Inc. | Method and apparatus for using ozone in a pressure vessel to treat stream of pollutants |
| CN200949061Y (en) * | 2005-12-07 | 2007-09-19 | 广州威固环保设备有限公司 | Ozone-ultraviolet photocatalysis water-treating equipment |
| CN201716269U (en) * | 2010-06-10 | 2011-01-19 | 山东省科学院海洋仪器仪表研究所 | Device for determining chemiluminescence characteristics of solid particles oxidized by ozone |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-26194A 2006.02.02 |
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