CN109013058B - High-efficient wet electrostatic precipitator catalytic oxidation jointly removes heavy metal device - Google Patents
High-efficient wet electrostatic precipitator catalytic oxidation jointly removes heavy metal device Download PDFInfo
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- CN109013058B CN109013058B CN201811135191.7A CN201811135191A CN109013058B CN 109013058 B CN109013058 B CN 109013058B CN 201811135191 A CN201811135191 A CN 201811135191A CN 109013058 B CN109013058 B CN 109013058B
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 54
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 35
- 230000003647 oxidation Effects 0.000 title claims abstract description 33
- 239000012719 wet electrostatic precipitator Substances 0.000 title claims abstract description 14
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000003546 flue gas Substances 0.000 claims abstract description 42
- 238000001179 sorption measurement Methods 0.000 claims abstract description 26
- 239000002923 metal particle Substances 0.000 claims abstract description 18
- 230000001699 photocatalysis Effects 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 238000010926 purge Methods 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000012717 electrostatic precipitator Substances 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 8
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 238000005367 electrostatic precipitation Methods 0.000 abstract 2
- 238000004140 cleaning Methods 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 2
- 231100001243 air pollutant Toxicity 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- 239000011669 selenium Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Toxicology (AREA)
- Electrostatic Separation (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to a high-efficiency wet electrostatic precipitator catalytic oxidation combined heavy metal removal device, which comprises an electrostatic precipitation zone (3), a spraying zone (4), a flue gas inlet (5), a flue gas outlet (12), an ash bucket (8) and a photocatalytic oxidation zone, wherein the flue gas inlet (5) is arranged at the spraying zone (4), and the electrostatic precipitation zone (3) is arranged right above the spraying zone (4) and comprises a plurality of positive plates and negative plates which are sequentially staggered. Compared with the prior art, the method has the advantages of adopting a multistage heavy metal particle removal process, being high in removal rate, capable of automatically cleaning the adsorption plate, high in automation degree and the like.
Description
Technical Field
The invention relates to the field of flue gas treatment, in particular to a high-efficiency catalytic oxidation combined heavy metal removal device of a wet electrostatic precipitator.
Background
China is the largest coal producing country in the world and also the largest coal consuming country, and coal accounts for about 70% of the energy structures at present. According to the prediction, the thermal power generation capacity of China still accounts for more than 50% of the total power generation amount of China in 2050. Coal is a dominant place in the energy framework of China and is difficult to change in a quite long time.
The coal burning process is accompanied by the generation of a large amount of pollutants, besides ash, waste water, SO 2, NOx and particulate matters (PM 2.5), the flue gas also contains various heavy metals such as arsenic, selenium, lead and the like, wherein the heavy metals are mainly concentrated on submicron particles and are difficult to be effectively captured by conventional atmospheric pollution facilities, the heavy metals mainly exist in an aerosol form in the atmosphere and are difficult to settle, and most of harmful heavy metals are difficult to be degraded by microorganisms and stay in the atmosphere for a long time, SO that serious threat is caused to ecological environment and human health. Statistics of the Environmental Protection Agency (EPA) completed on the atmospheric pollutant emissions from fossil fuel power plants show that the heavy metal emissions from coal-fired power plants have been reduced compared to 2005, with the exception of mercury, and the atmospheric emissions of arsenic, lead, chromium, and cadmium have increased by a factor of 2-8 times 2005. Research shows that since 1949, the atmospheric emission of 12 typical harmful heavy metal elements is increased by 22-128 times, and 12 heavy metal atmospheric emissions in 2012 total about 79570 tons, and industrial coal-fired boilers and coal-fired power plants are one of main harmful heavy metal atmospheric emission sources.
Therefore, in order to reduce the emission of heavy metal pollutants in the atmosphere of a coal-fired power plant, form conversion, distribution and control of heavy metals in the coal-fired process are carried out, and various technologies for removing particulate matters, heavy metals and the like in flue gas are required to be developed. The patent application number 201810302692.3 discloses a wet electrostatic precipitator, including clearance subassembly and quick-witted case, one side of machine case is provided with the air inlet, the top of machine case is provided with the gas outlet, the below of machine case is provided with the sedimentation tank. The technical scheme has the defects that the heavy metal removal process is single, the grading treatment cannot be realized, and the removal rate is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-efficiency catalytic oxidation combined heavy metal removal device for a wet electrostatic precipitator.
The aim of the invention can be achieved by the following technical scheme:
The utility model provides a high-efficient wet electrostatic precipitator catalytic oxidation jointly removes heavy metal device, the heavy metal device of desorption include electrostatic precipitator district, spray district, flue gas import, flue gas export, ash bucket and photocatalytic oxidation district, the flue gas import set up in spray district department, electrostatic precipitator district locate directly over the spray district, it contains polylith positive plate and negative plate of crisscross arrangement in proper order, electrostatic precipitator district include discharge adsorption zone and purge zone, photocatalytic oxidation district and discharge adsorption zone communicate with each other, ash bucket be located spray district under, flue gas gets into spray district by the flue gas import, the drop that sprays and partial heavy metal particle combine to form great granule and subside into ash bucket, another partial heavy metal particle upwards gets into discharge adsorption district and purge zone, the heavy metal particle that gets into discharge adsorption district is through the partial absorption on the electrode plate after discharging, discharge adsorption zone's electrode plate intermittent type rotates to purge zone and is purged to in the ash bucket, the flue gas gets into photocatalytic oxidation district after discharging adsorption zone, residual heavy metal particle is catalyzed oxidation in photocatalytic oxidation district, the flue gas is discharged by the flue gas export at last after purifying.
Further, the discharge adsorption area and the purge area are provided with the same number of polar plates, wherein the distance between the positive plate and the negative plate is the same, liquid drops are contacted and combined with relatively smaller heavy metals such as arsenic, selenium, lead, mercury and the like to generate larger particles which are easy to trap, the dust particles absorb water to increase the mass, corona discharge is electrified to ionize surrounding gas, dust in flue gas and the surface of the liquid drops are charged, and the charged particles move to the polar plates and are enriched under the action of an electric field force.
Further, the center of the electrostatic dust removal area is also provided with a main shaft, the positive plate and the negative plate are connected to the main shaft and are driven by the main shaft to intermittently rotate, the intermittent rotation frequency depends on specific operation requirements, and the rotation frequency can be increased when the adsorption quantity on the positive plate is increased, so that the electrostatic adsorption effect is improved.
Further, a purging component is arranged in the purging zone, and the purging component is arranged above the positive plate and the negative plate.
Further, the purging component is a high-pressure air injector or a high-pressure water column injector, and the air or water column with the pressure of 2-5 MPa sprayed by the purging component enables heavy metal particles on the positive plate and the negative plate to be flushed into the ash bucket.
The electrostatic dust removing area and the spraying area are provided with metal mesh plates, the diameters of mesh holes on the metal mesh plates are larger than 0.3cm, and the metal mesh plates are provided with sprayers for spraying downwards.
Further, the diameter of the water mist particles sprayed by the sprayer is 10-200 μm, the surface potential energy of the water mist particles contacted with heavy metal particles is more favorable to be reduced when the water mist particles are in the range, the stability of the newly formed large particles is more favorable, the sedimentation rate of the heavy metal particles is higher, and the water mist particles in the range are also favorable to the aggregation and sedimentation of other microparticles in smoke dust through tests.
The ash bucket is of a round table type structure with the inner diameter being reduced from top to bottom, a sewage outlet is formed in the bottom of the ash bucket, heavy metal particles deposited at the ash bucket are discharged from the sewage outlet, and smoke dust in the ash bucket is accumulated more densely, so that smoke entering through a spraying area directly from a smoke inlet cannot flow out of the sewage outlet.
The photocatalytic oxidation area is provided with a metal mesh and a UV lamp, and residual heavy metals in the flue gas are adsorbed on the metal mesh and are catalytically oxidized under the irradiation of the UV lamp.
Further, the metal mesh wire is coated with a modified TiO 2 film, the modified TiO 2 film is prepared by a sol-gel method, the particle size of the modified TiO 2 film is 10nm-80nm, residual heavy metals in the flue gas are catalytically oxidized on the surface of the TiO 2 to form metal oxides, and the metal mesh wire is of a detachable structure and can be replaced or ash removed after being detached. In addition, carbon monoxide and nitrogen oxides in the flue gas undergo oxidation reactions at this point and are converted into non-air pollutants.
Compared with the prior art, the invention aims at effectively removing pollutant particles and heavy metals in the flue gas, adopts the wet electrostatic precipitator and the integrated device of the removal and catalytic oxidation, and removes the heavy metals through the wet electrostatic precipitator when the flue gas passes through the inlet, and further carries out photocatalytic oxidation removal through the photocatalytic reaction area, thereby improving the removal rate of the heavy metals on the whole.
Drawings
FIG. 1 is a schematic diagram of a heavy metal removal device according to the present invention;
fig. 2 is a schematic structural diagram of an electrostatic precipitator in the present invention.
In the figure: 3. the device comprises an electrostatic dust collection area, 4, a spraying area, 5, a flue gas inlet, 7, a sewage drain, 8, an ash bucket, 9, a UV lamp, 12, a flue gas outlet, 13, a metal mesh, 31, a discharge adsorption area, 32, a purging area, 33, a main shaft, 321 and a purging component.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Examples
The heavy metal removing device comprises an electrostatic dust removing area 3, a spraying area 4, a flue gas inlet 5, a flue gas outlet 12, an ash bucket 8 and a photocatalytic oxidation area, and referring to fig. 1, the flue gas inlet 5 is arranged at the spraying area 4, the photocatalytic oxidation area is communicated with a discharge adsorption area 31, and the ash bucket 8 is positioned under the spraying area 4. A metal mesh plate is arranged between the electrostatic dust collection area 3 and the spraying area 4, the diameter of mesh holes on the metal mesh plate is larger than 0.3cm, and a sprayer for spraying downwards is arranged on the metal mesh plate. The diameter of the water mist particles sprayed by the sprayer is 10-200 mu m. The ash bucket 8 is of a truncated cone-shaped structure with the inner diameter decreasing from top to bottom, and a sewage outlet 7 is arranged at the bottom of the ash bucket 8.
The electrostatic dust removal area 3 is arranged right above the spraying area 4 and comprises a plurality of positive plates and negative plates which are sequentially staggered, and the electrostatic dust removal area 3 comprises a discharge adsorption area 31 and a purging area 32, as shown in fig. 2. The discharge adsorption region 31 and the purge region 32 have the same number of electrode plates, wherein the distance between the positive electrode plate and the negative electrode plate is the same. The center of the electrostatic dust collection area 3 is also provided with a main shaft 33, the positive plate and the negative plate are both connected to the main shaft 33 and are driven by the main shaft 33 to intermittently rotate, the intermittent rotation frequency depends on specific operation requirements, and the rotation frequency can be increased when the adsorption quantity on the polar plate is increased, so that the electrostatic adsorption effect is improved. The purging area 32 is provided with a purging component 321, and referring to fig. 1, the purging component 321 is arranged above the positive plate and the negative plate. The purge component 321 is a high pressure air ejector or a high pressure water column ejector.
The photocatalytic oxidation area is internally provided with a metal mesh 13 and a UV lamp 9, the metal mesh 13 is coated with a modified TiO 2 film, residual heavy metal in the flue gas is catalyzed and oxidized to metal oxide on the surface of TiO 2, the metal mesh 13 is of a detachable structure, and the metal mesh 13 can be replaced or ash removed after being detached. In addition, carbon monoxide and nitrogen oxides in the flue gas undergo oxidation reactions at this point and are converted into non-air pollutants.
In a specific operation process, flue gas firstly enters a spraying area 4 through a flue gas inlet 5, the sprayed liquid drops and part of heavy metal particles are combined to form larger particles and are settled into an ash bucket 8, the other part of heavy metal particles upwards enter a discharge adsorption area 3 and a purging area 32, the heavy metal particles entering the discharge adsorption area 31 are partially adsorbed on an electrode plate after corona discharge, the electrode plate of the discharge adsorption area 31 intermittently rotates for 180 degrees to the purging area 32 and is purged into the ash bucket 8, the heavy metal particles deposited at the ash bucket are discharged from a sewage outlet 7, and the like, as shown in fig. 2. The flue gas enters the photocatalytic oxidation area after passing through the discharge adsorption area 3, residual heavy metals in the flue gas are adsorbed on the metal mesh 13 and are catalyzed and oxidized under the irradiation of the UV lamp 9, and the purified flue gas is finally discharged from the flue gas outlet 12.
Claims (5)
1. The utility model provides a high-efficient wet electrostatic precipitator catalytic oxidation combination heavy metal removal device, its characterized in that, heavy metal removal device include electrostatic precipitator (3), spray zone (4), flue gas import (5), flue gas export (12), ash bucket (8) and photocatalytic oxidation district, flue gas import (5) set up in spray zone (4) department, electrostatic precipitator (3) locate directly over spray zone (4), it contains positive plate and negative plate that the polylith is staggered in proper order, electrostatic precipitator (3) include discharge adsorption zone (31) and purge zone (32), photocatalytic oxidation district and discharge adsorption zone (31) communicate with each other, ash bucket (8) be located spray zone (4) directly under, flue gas gets into spray zone (4) from flue gas import (5), the drop that sprays out and some heavy metal particles combine to form great granule and subside into ash bucket (8), another part heavy metal particles upwards gets into discharge adsorption zone (3) and purge zone (32), heavy metal particles that get into discharge adsorption zone (31) are adsorbed in corona adsorption zone (31) and are followed by the oxidation of the photocatalytic oxidation district (31) and are blown in the intermittent type oxidation district of the flue gas that the photocatalytic oxidation district is passed through, the residual heavy metal particles is blown to the oxidation zone (3 in the rotary oxidation of the electrode plate (8), the purified flue gas is finally discharged from a flue gas outlet (12);
The discharge adsorption area (31) and the purge area (32) are provided with the same number of polar plates, wherein the distances between the positive polar plates and the negative polar plates are the same;
The center of the electrostatic dust collection area (3) is also provided with a main shaft (33), and the positive plate and the negative plate are both connected to the main shaft (33) and are driven by the main shaft (33) to intermittently rotate;
A purging component (321) is arranged in the purging zone (32), and the purging component (321) is arranged above the positive plate and the negative plate;
the ash bucket (8) is of a round table structure with the inner diameter decreasing from top to bottom, a sewage outlet (7) is arranged at the bottom of the ash bucket (8), and heavy metal particles deposited at the ash bucket are discharged from the sewage outlet (7);
The photocatalytic oxidation zone is provided with a metal mesh (13) and a UV lamp (9), and residual heavy metals in the flue gas are adsorbed on the metal mesh (13) and are catalytically oxidized under the irradiation of the UV lamp (9).
2. The device for combined catalytic oxidation and heavy metal removal of a high-efficiency wet electrostatic precipitator according to claim 1, wherein the purging component (321) is a high-pressure air ejector or a high-pressure water column ejector.
3. The device for combined removal of heavy metals by catalytic oxidation of a high-efficiency wet electrostatic precipitator according to claim 1, wherein a metal mesh plate is arranged between the electrostatic precipitator zone (3) and the spraying zone (4), the diameter of mesh holes on the metal mesh plate is larger than 0.3cm, and a sprayer for spraying downwards is arranged on the metal mesh plate.
4. The device for combined catalytic oxidation and heavy metal removal of the high-efficiency wet electrostatic precipitator according to claim 3, wherein the diameter of water mist particles sprayed by the sprayer is 10-200 μm.
5. The device for combined catalytic oxidation and heavy metal removal of the high-efficiency wet electrostatic precipitator according to claim 1, wherein the metal mesh (13) is coated with a modified TiO 2 film.
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| CN201811135191.7A CN109013058B (en) | 2018-09-27 | 2018-09-27 | High-efficient wet electrostatic precipitator catalytic oxidation jointly removes heavy metal device |
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| CN201811135191.7A CN109013058B (en) | 2018-09-27 | 2018-09-27 | High-efficient wet electrostatic precipitator catalytic oxidation jointly removes heavy metal device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109999652A (en) * | 2019-04-08 | 2019-07-12 | 上海电力学院 | Boiler fired coal flue gas purification device |
| CN110449017B (en) * | 2019-08-13 | 2024-07-23 | 上海电力大学 | Device for removing heavy metals of arsenic, selenium and lead by improving WESP through alkali liquor injection |
| CN110449021B (en) * | 2019-08-13 | 2024-07-23 | 上海电力大学 | WESP device for efficiently removing heavy metals by combining two-stage adsorption and two-stage spraying |
| CN113351370B (en) * | 2021-06-30 | 2023-04-07 | 上海电力大学 | Composite electrostatic dust collection device for removing arsenic, selenium and lead in flue gas |
| CN113769767B (en) * | 2021-09-30 | 2023-06-09 | 华北电力大学（保定） | A conductive catalytic membrane and its preparation method and a method for purifying flue gas by coupling ozone with conductive catalytic membrane |
| CN116651194B (en) * | 2023-05-26 | 2024-08-23 | 上海沃德鑫丰环境科技有限公司 | Exhaust gas treatment method and device |
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| CN203017986U (en) * | 2013-01-30 | 2013-06-26 | 中国海洋大学 | Photocatalysis desulfurization, denitrification and demercuration integrated moving bed reactor |
| CN106881004A (en) * | 2017-04-28 | 2017-06-23 | 广州环天环境科技有限公司 | For the adsorption/desorption device of TREATMENT OF VOCs system |
| CN208494566U (en) * | 2018-09-27 | 2019-02-15 | 上海电力学院 | A kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device |
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