CN101791590B - Method for forming ash removing water film for wet electric dust remover and dust collecting pole plate used by same - Google Patents
Method for forming ash removing water film for wet electric dust remover and dust collecting pole plate used by same Download PDFInfo
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- CN101791590B CN101791590B CN2010101050264A CN201010105026A CN101791590B CN 101791590 B CN101791590 B CN 101791590B CN 2010101050264 A CN2010101050264 A CN 2010101050264A CN 201010105026 A CN201010105026 A CN 201010105026A CN 101791590 B CN101791590 B CN 101791590B
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- collecting pole
- dust
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- 239000000428 dust Substances 0.000 title claims abstract description 104
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000005684 electric field Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003546 flue gas Substances 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000008400 supply water Substances 0.000 description 5
- 239000003500 flue dust Substances 0.000 description 4
- 239000012716 precipitator Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a method for forming an ash removing water film for a wet electric dust remover and a dust collecting pole plate used by the same. The invention solves the problem that a water film for completely covering the pole plate can not be formed on a super-high pole plate higher than 10 meters, thus the wet electric dust remover can be used for removing dust in super-large-flow flue gas such as flue gas in coal burning boilers of thermal power plants and the like, and the invention has the advantages of reducing floor space, saving dust removing water, and the like. The method for forming the ash removing water film comprises the following steps: dividing the dust collecting pole plate into a plurality of vertical strip-shaped regions along the airflow direction, supplying water to the pole plate from the upper space of the dust collecting pole plate, limiting the dust removing water in each narrow strip-shaped region to flow downwards, and covering each small strip-shaped region, thereby forming the water film for completely covering the whole dust collecting pole plate.
Description
Technical field
The invention belongs to the environmental protection filed of flue gas purification, relate in particular to a kind of ash removing water film for wet electric dust remover formation method and dust collecting pole plate used by same.
Background technology
Wet electrical dust precipitator is utilized on the pole plate and forms water membrane and clean and be trapped in the dust on the pole plate.The direction dust-collecting polar board of electric dust remover supplies water on deduster, and deashing water flows downward under the gravity effect, forms the ash removing water film that covers whole pole plate, takes away the dust that is collected on the dust collecting pole plate, falls into the ash bucket of deduster below.Compare with the dry electric precipitation device and to have the following advantages: do not need rapping equipment, thereby eliminated the reentrainment of dust that rapping causes, can also prevent air-flow, the wind-induced reentrainment of dust of corona; Water membrane is arranged on the pole plate all the time, rinsed out by moisture film immediately after dust (flue dust) become trapped on the pole plate, thereby, anti-corona can not take place, the reentrainment of dust that anti-corona causes can not take place for high resistivity dust (flue dust); For low resistivity dust (flue dust), the particle that can not be captured is fled from pole plate, once more the phenomenon in the Returning flow.Because above-mentioned advantage, wet-esp has very high efficiency of dust collection, can be fit to any flue dust than resistance, can smoke dust discharge concentration be controlled at 10mg/Nm
3Below, satisfy in the world the requirement of strict discharge standard.
Wet-esp mainly captures at tarvia capture, coal gas dust removal, chemical plant's smog at present, use in field such as hot scarfing machine flue gas ash removal in the casting of metallurgical steelmaking converter, cogging process.Existing wet-esp pole plate or be flat, or be drum type brake.Because moisture film relies on gravity to flow downward voluntarily on pole plate, meet with obstruction or the polar board surface characteristic variations, will change the flow direction; Phenomenons such as " confluxing ", " playing tuft " taking place, below pole plate, can not form complete even moisture film, causes some place not have moisture film; Dust cleaning on these local pole plates is not fallen, and is long-pending more thick more, corona discharge electrode takes place laying dust is discharged; Cause the phenomenon that electric precipitation can't normal power supply, can't work when serious.Thereby existing wet-esp pole plate height is 6 meters of superelevation not generally, and is opposite with dry electric precipitation profile " narrow height "; It all is " short and stout " type; Floor space is big, can't handle big exhaust gas volumn, for the millions of exhaust gas volumn of coal-fired power station boiler; More than ten meter of pole plate height even reach more than 20 meter is difficult to use especially.
Summary of the invention
The object of the invention is exactly the problem that on superelevation pole plate more than tens meters, can't form complete covering pole plate moisture film in order to solve; Wet-esp can be used on big exhaust gas volumn equipment such as coal-fired power station boiler; A kind of have reduction floor space, the ash removing water film for wet electric dust remover formation method of advantages such as reduce water consumption and dust collecting pole plate used by same are provided.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of ash removing water film for wet electric dust remover formation method; Dust collecting pole plate is divided into the plurality of vertical bar-shaped zone along airflow direction; The direction dust collecting pole plate supplies water on dust collecting pole plate; Deashing water is constrained in each narrow bar-shaped zone and flows downward, and covers each little bar-shaped zone, covers complete moisture film thereby on whole dust collecting pole plate, form.
The said balanced water supply of direction dust collecting pole plate on dust collecting pole plate, all identical along initial pressure, flow velocity and the flow of each point current direction current downflow on the airflow direction pole plate.
A kind of ash removing water film for wet electric dust remover formation method is used dust collecting pole plate, and said dust collecting pole plate is to be processed into the stripe board of being made up of some narrow vertical bars, and two adjacent vertical bars are not on same perpendicular, and slick and sly the processing done at the adjacent corners place.Two adjacent vertical bar horizontal direction distances are 0.1-2mm, and each vertical bar width can be identical, also can be different, and width range 5-70mm.
A kind of ash removing water film for wet electric dust remover formation method is used dust collecting pole plate, and said dust collecting pole plate is to arrange on the pole plate of plane some vertical cut-off rules dust collecting pole plate to be divided into the plurality of vertical bar-shaped zone.
Said cut-off rule material can be anti-corrosion metal wire, non-metal wire or other material lines; The cut-off rule section configuration is square, circular, triangle, trapezoidal, oval or other shape.Cut-off rule equivalent diameter (cut-off rule cross sectional area with cut-off rule cross section girth ratio four times) is 0.5-4mm, and the spacing between each cut-off rule equates or be different that distance range between the cut-off rule is 5-70mm.
Saidly form cut-off rule at polar board surface and can adopt several different methods; As: plunging; With mechanical means cut-off rule is pressed in the polar board surface; The pole plate opposite side forms a salient line, and the cut-off rule that is pressed in a side utilization of pole plate is divided into some bar-shaped zones with pole plate, by the pole plate salient line polar board surface is divided into bar-shaped zone at the opposite side of pole plate; Mounting method utilizes binding agent that " cut-off rule " sticked on polar board surface; Welding is welded on " cut-off rule " on the pole plate; Integral forming method if polar board surface is nonmetallic materials, can directly be made the pole plate of band " cut-off rule " when making pole plate.As long as it is also passable that other method can form cut-off rule.
Can adopt variety of way to dust collecting pole plate water supply; Like overflow, water distributor perforate water spray, atomizer directly to pole plate water spray, pole plate interior reservoir side's perforate waterborne water distribution or the like; But must guarantee on dust collecting pole plate, to realize balanced water supply; Guarantee deashing water in the pole plate upper edge airflow direction, the initial pressure that flows downward and flow velocity, flow are identical.Adopt atomizer to spray water to electric field space, the water droplets and the water yield are wanted evenly in spatial distribution.
In order to ensure on pole plate, forming good moisture film, pole plate is carried out ungrease treatment, remove surface and oil contaminant.
Beneficial effect of the present invention is:
1, adopts method of the present invention; Change the direction of motion in the time of can limiting moisture film and flow downward, it is confined to flow downward in the narrow vertical bar, thereby can on the overlength pole plate, forms moisture film; Even on tens meters high pole plates of large-scale electric cleaner that coal fired power plant adopts, also can form the moisture film of complete covering pole plate; Thereby effectively deashing makes wet-esp can handle big exhaust gas volumn, removes the technical bottleneck that it can not be used in the coal-burning power plant;
2, using water wisely will be guaranteed on pole plate, to form even moisture film and thoroughly remove dust stratification, and supplying water along the airflow direction pole plate to have enough outputs, usually along the pole plate length water requirement 0.015-0.025m of airflow direction unit
3/ min.m.If the electric cleaner pole plate is high, when handling identical exhaust gas volumn, electric cleaner will reduce along the length and the port number of airflow direction, and total output will reduce, thereby can using water wisely.High 6 meters such as original pole plate, adopt pole plate of the present invention high 15 meters, just reduce to original 40% along the airflow direction pole plate is long, thereby can economize on water 60%.Water saving also has related benefit, can reduce deashing water circulation use treatment facility scale, reduces deashing water treatment amount, reduces investment of deashing water circulation treatment device and operating cost, reduces pump energy consumption.
3, ash removing water film is evenly complete, and ash-removal effect is good, when pole plate, can not form the deashing dead angle, can not form obstinate dust piece, thereby corona wire can not take place to the dust stratification electric discharge phenomena, guarantees to preside over power supply, guarantees the electric precipitation operate as normal.
Description of drawings
Fig. 1 is a wet electrical dust precipitator pole plate front view;
Fig. 2 is a kind of wet electrical dust precipitator pole plate A-A horizontal section cutaway view;
Fig. 3 is another kind of wet electrical dust precipitator pole plate A-A horizontal section cutaway view;
Fig. 4 is a layout constraints line electric precipitation pole plate A-A horizontal section cutaway view;
Fig. 5 a is a constrained line cross-sectional view example;
Fig. 5 b is a constrained line cross-sectional view example;
Fig. 5 c is a constrained line cross-sectional view example;
Fig. 5 d is a constrained line cross-sectional view example;
Fig. 5 e is a constrained line cross-sectional view example;
Fig. 5 f is a constrained line cross-sectional view example;
Fig. 5 g is a constrained line cross-sectional view example.
The specific embodiment
Wherein, 1. vertical bar, 2. cut-off rule, 3. dust collecting pole plate.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
The method that wet-esp ash removing water film of the present invention forms; It is that dust collecting pole plate is divided into the plurality of vertical bar-shaped zone along airflow direction; The direction pole plate supplies water on pole plate; Deashing water is constrained in each narrow bar-shaped zone and flows downward, and covers each little bar-shaped zone, covers complete moisture film thereby on whole pole plate, form.The direction dust collecting pole plate supplies water and can adopt overflow, water distributor perforate water spray, atomizer directly to modes such as pole plate water spray, pole plate interior reservoir side's perforate waterborne water distributions on dust collecting pole plate; But must guarantee to realize balanced water supply along airflow direction; Initial pressure, flow velocity and the flow of each point current direction current downflow are all identical on the pole plate, and water (flow) direction is vertical with airflow direction.Adopt atomizer to spray water to electric field space, the water droplets and the water yield are wanted evenly in spatial distribution.
Embodiment 1:
The electric precipitation pole plate is struck out stripe board shown in Figure 2, vertical bar 1 width W
1, W
2Be 30mm; Adjacent vertical bar 1 horizontal direction is 1.0mm apart from δ, and direction dust collecting pole plate 3 supplies water on electric cleaner, and the moisture film that flows downward is limited in each vertical bar 1; Form the moisture film that covers whole vertical bar 1, some moisture films are formed the moisture film that covers whole dust collecting pole plate 3.
Embodiment 2:
Dust collecting pole plate 3 is struck out stripe board shown in Figure 3, vertical bar 1 width W
1, W
2, W
3Be 20mm.Adjacent vertical bar 1 horizontal direction is 0.5mm apart from δ.Direction dust collecting pole plate 3 supplies water on electric cleaner, and the moisture film that flows downward is limited in each vertical bar 1, forms the moisture film band that covers whole vertical bar 1, and some moisture film bands are formed the moisture film that covers whole dust collecting pole plate 3.
Embodiment 3:
Dust collecting pole plate 3 is struck out stripe board shown in Figure 2, vertical bar 1 width W
1, W
2Be respectively 20mm, 40mm, adjacent vertical bar 1 horizontal direction is 0.6mm apart from δ.Above electric cleaner, supply water to dust collecting pole plate 3 with atomizer, deashing water is limited in flowing downward in each vertical bar 1, covers whole vertical bar 1, and some vertical bar 1 moisture films are formed the moisture film that covers whole dust collecting pole plate 3.
Embodiment 4:
Dust collecting pole plate 3 is struck out stripe board shown in Figure 3, vertical bar 1 width W
1, W
2, W
3Be respectively 25mm, 35mm, 45mm, adjacent vertical bar 1 horizontal direction is apart from δ
1, δ
2Be respectively 0.3mm, 0.6mm.Above dust collecting pole plate 3, supply water to dust collecting pole plate 3 with the perforate water distributor, deashing water is limited in flowing downward in each vertical bar 1 and covers whole vertical bar 1, and some vertical bar 1 moisture films are formed the moisture film that covers whole pole plate.
Embodiment 5:
On pole plate 3, arrange cut-off rule 2 to form constraint, on dust collecting pole plate 3, be pressed into the circular corrosion resistant alloy cut-off rule of diameter 2mm line 2, half is pressed into cut-off rule 2 in dust collecting pole plate 3 surfaces, and cut-off rule 2 arranges that evenly distance L is 15mm between the cut-off rule 2.In a side of dust collecting pole plate 3, cut-off rule 2 is divided into the plurality of vertical bar-shaped zone with dust collecting pole plate 3.At the opposite side of dust collecting pole plate 3, protruding pole plate prismatic becomes cut-off rule 2 restriction ash removing water films between two protruding ribs, to flow downward, and forms the moisture film that covers whole dust collecting pole plate 3.Above dust collecting pole plate 3, supply water to dust collecting pole plate 3 through overflow, deashing water flows downward in narrow bar-shaped zone, covers bar-shaped zone.Some bar shaped moisture films constitute the moisture film that covers whole dust collecting pole plate 3.
Embodiment 6:
Arrange that on dust collecting pole plate 3 cut-off rule 2 to form constraint, is pressed into square constraint alloy bar on the dust collecting pole plate 3, alloy bar is square, cross dimensions 1.5mm * 3mm, the distance L between the alloy bar cut-off rule 2
1, L
2Be respectively 10mm, 25mm, the slick and sly processing done at the alloy bar edge.Half is pressed into alloy bar in 3 of the dust collecting pole plates.In the both sides of dust collecting pole plate 3, form the cut-off rule 2 that metal wire and dust collecting pole plate 3 protruding ribs are formed respectively, supply water to dust collecting pole plate 3, ash removing water film is flowed downward by the cut-off rule restriction, forms the moisture film that covers whole dust collecting pole plate 3.
Embodiment 7:
Adopt resin material to do fiberglass dust collecting pole plate 3, make the dust collecting pole plate 3 with protruding cut-off rule 2 shapes during dust collecting pole plate 3 moulding, cut-off rule 2 sections are semicircle, diameter 1mm, and distance is 50mm between the cut-off rule 2.Supply water to this dust collecting pole plate 3, ash removing water film is limited in flowing downward in some 50mm vertical bars, forms the moisture film that covers whole dust collecting pole plate 3.
Claims (3)
1. ash removing water film for wet electric dust remover formation method; It is characterized in that; Dust collecting pole plate is divided into the plurality of vertical bar-shaped zone along airflow direction, and the direction pole plate supplies water on dust collecting pole plate, and deashing water is constrained in each narrow bar-shaped zone and flows downward; And cover each little bar-shaped zone, cover complete moisture film thereby on whole dust collecting pole plate, form; The direction dust collecting pole plate supplies water and adopts overflow, water distributor perforate water spray, atomizer directly to pole plate water spray, pole plate interior reservoir side's perforate waterborne water distribution manner on dust collecting pole plate; And guarantee to realize balanced water supply along airflow direction; Initial pressure, flow velocity and the flow of each point current direction current downflow are all identical on the pole plate; Water (flow) direction is vertical with airflow direction, adopts atomizer to spray water to electric field space, and the water droplets and the water yield are wanted evenly in spatial distribution.
2. the described ash removing water film for wet electric dust remover formation of claim 1 method is used dust collecting pole plate, it is characterized in that, said dust collecting pole plate is the stripe board of being made up of some narrow vertical bars, and two adjacent vertical bars are not on same perpendicular; Said two adjacent vertical bar horizontal direction distances are 0.1-2mm, and each vertical bar width is identical or different, vertical bar width range 5-70mm.
3. the described ash removing water film for wet electric dust remover formation of claim 1 method is used dust collecting pole plate, it is characterized in that, said dust collecting pole plate is the plane pole plate that is furnished with some vertical cut-off rules, and dust collecting pole plate is divided into the plurality of vertical bar-shaped zone; Said cut-off rule is anti-corrosion metal wire, non-metal wire or other material line; Each cut-off rule section configuration is one or more in square, circular, triangle, trapezoidal, oval or other shape; Said cut-off rule equivalent diameter 0.5-4mm, the spacing between each cut-off rule equates or is different that distance range between the cut-off rule is 5-70mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101050264A CN101791590B (en) | 2010-01-25 | 2010-01-25 | Method for forming ash removing water film for wet electric dust remover and dust collecting pole plate used by same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101050264A CN101791590B (en) | 2010-01-25 | 2010-01-25 | Method for forming ash removing water film for wet electric dust remover and dust collecting pole plate used by same |
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| Publication Number | Publication Date |
|---|---|
| CN101791590A CN101791590A (en) | 2010-08-04 |
| CN101791590B true CN101791590B (en) | 2012-04-11 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143444A (en) * | 2013-03-12 | 2013-06-12 | 清华大学 | Dust collecting polar plate for wet electrostatic dust collection |
| CN103170408A (en) * | 2013-04-02 | 2013-06-26 | 福建龙净环保股份有限公司 | Dust collecting pole plate applied on wet-type electrical deduster after wet desulphurization |
| CN103934268B (en) * | 2014-03-24 | 2015-08-12 | 济钢集团有限公司 | A kind of sheet rolling mill dust arrester |
| CN104437868A (en) * | 2014-11-11 | 2015-03-25 | 中国科学院过程工程研究所 | Transverse pole plate circling type wet electrostatic precipitator and wet electrostatic precipitation method |
| CN105498973A (en) * | 2015-11-25 | 2016-04-20 | 谢云松 | Electrostatic precipitation circulating type water film dust removing device and method |
| CN107537691B (en) * | 2017-08-30 | 2020-03-17 | 国家能源投资集团有限责任公司 | Polar plate for realizing uniform distribution of water films and wet electrostatic dust collector |
| CN109499767B (en) * | 2018-12-19 | 2020-07-28 | 宜兴市爱迪尔科技有限公司 | Vertical wet electric dust remover |
| CN111878921B (en) * | 2020-07-28 | 2021-12-24 | 郭米娟 | Water-saving wet-type air purification equipment |
| CN114769002B (en) * | 2022-05-30 | 2022-09-16 | 浙江安达环保设备有限公司 | Wet-type electrostatic precipitator spray set and wet-type electrostatic precipitator |
| CN116713114B (en) * | 2023-08-08 | 2023-10-20 | 江苏中顺节能科技有限公司 | Dust collection polar plate of wet electric precipitator with uniformly distributed liquid film and liquid film distribution method |
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| CN2408971Y (en) * | 1999-03-29 | 2000-12-06 | 蔺少春 | Wet electrostatic smoke purifier |
| CN101396677A (en) * | 2008-11-05 | 2009-04-01 | 中冶京诚工程技术有限公司 | Pole plate flushing device and method |
| CN201613180U (en) * | 2010-01-25 | 2010-10-27 | 山东电力研究院 | Dust collecting polar plate in wet-type electric dust removing and soot cleaning moisture film formation method |
-
2010
- 2010-01-25 CN CN2010101050264A patent/CN101791590B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4553987A (en) * | 1982-03-11 | 1985-11-19 | Lastro Ky | Continuously rinsed electric dust collector |
| CN2408971Y (en) * | 1999-03-29 | 2000-12-06 | 蔺少春 | Wet electrostatic smoke purifier |
| CN101396677A (en) * | 2008-11-05 | 2009-04-01 | 中冶京诚工程技术有限公司 | Pole plate flushing device and method |
| CN201613180U (en) * | 2010-01-25 | 2010-10-27 | 山东电力研究院 | Dust collecting polar plate in wet-type electric dust removing and soot cleaning moisture film formation method |
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Effective date of registration: 20220125 Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong Patentee before: SHANDONG ELECTRIC POWER Research Institute Patentee before: STATE GRID CORPORATION OF CHINA |