CN109013058A - A kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device - Google Patents
A kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device Download PDFInfo
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- CN109013058A CN109013058A CN201811135191.7A CN201811135191A CN109013058A CN 109013058 A CN109013058 A CN 109013058A CN 201811135191 A CN201811135191 A CN 201811135191A CN 109013058 A CN109013058 A CN 109013058A
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- heavy metal
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- catalysis oxidation
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- electrostatic precipitator
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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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Biomedical Technology (AREA)
- Electrostatic Separation (AREA)
Abstract
The present invention relates to a kind of high-efficient wet-type electrostatic precipitator catalysis oxidations to combine removing heavy metal device, the removing heavy metal device includes electrostatic precipitation area (3), spraying zone (4), gas inlet (5), exhanst gas outlet (12), ash bucket (8) and photochemical catalytic oxidation area, the gas inlet (5) is opened at spraying zone (4), the electrostatic precipitation area (3) is set to the surface of spraying zone (4), and it includes muti-piece successively staggered positive plates and negative plate.Compared with prior art, the advantages that present invention has the removal process for using multistage heavy metal particles, and removal rate is high, can automatically clean to adsorption plate, high degree of automation.
Description
Technical field
The present invention relates to the process fields of flue gas, combine more particularly, to a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation
Remove heavy metal device.
Background technique
China is maximum coal production state in the world, is also the largest consumption of coal state, coal is in energy resource structure at present
Account for 70% or so.It is predicted that China's thermoelectricity generated energy still can account for the share of 50% or more total amount of whole nation power generation to the year two thousand fifty.
The principal status of public economy of the coal in China's energy frame, was difficult to change within the quite a long time.
Coal-fired process is generated along with a large amount of pollutants, in addition to lime-ash, waste water, SO2, NOx, particulate matter (PM2.5) with
Outside, also containing various heavy such as arsenic, selenium, lead etc. in flue gas, these heavy metals are mainly enriched on submicron particles, it is difficult to quilt
Normal atmospheric pollution facility effectively captures, they mainly exist in an atmosphere with aerosol form, not easily settled and most of
Harmful heavy metal is difficult to be degraded by microorganisms, and stops in an atmosphere, causes seriously for a long time to ecological environment and human health
Threat.Environmental Protection Agency (EPA) complete the statistical data about fossil-fuelled power-plants Air Pollutants Emissions show,
Coal-burning power plant's heavy metals emission amount compared with 2005, the removal of mercury declined it is outer, arsenic, lead, chromium, cadmium atmosphere discharge amount increase to
2-8 times in 2005.Studies have shown that the atmosphere discharge amount of 12 kinds of typical toxic heavy metal elements increases since 1949
22-128 times, 12 heavy metal species atmosphere discharge in 2012 is about 79570 tons total, and industry coal-boiler, coal-burning power plant are main
One of harmful heavy metal atmosphere emission source.
Therefore, to reduce coal-burning power plant's atmosphere heavy metal pollution object discharge amount, the form of heavy metal in coal-fired process is carried out
Conversion, distribution and control, need to develop various technologies and remove for particulate matter, the heavy metal etc. in flue gas.Application number
A kind of wet cottrell, including cleaning assembly and cabinet, the side of cabinet are disclosed for 201810302692.3 patent
It is provided with air inlet, gas outlet is provided at the top of the cabinet, is provided with sedimentation basin below the cabinet.The technical solution
The shortcomings that it is single for the removal process to heavy metal, can not achieve classification processing, cause removal rate not high.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of high-efficient wet-type electrostatic
Deduster catalysis oxidation joint removing heavy metal device.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device, the removing heavy metal device
Including electrostatic precipitation area, spraying zone, gas inlet, exhanst gas outlet, ash bucket and photochemical catalytic oxidation area, the gas inlet is opened up
At spraying zone, the electrostatic precipitation area is set to the surface of spraying zone, and it includes muti-piece successively staggered positive plates
And negative plate, the electrostatic precipitation area include electric discharge adsorption zone and purge zone, the photochemical catalytic oxidation area and electric discharge are adsorbed
Area communicates, and the ash bucket is located at the underface of spraying zone, and flue gas enters spraying zone by gas inlet, the drop sprayed out and portion
The heavy metal particles divided combine and form biggish particle and settle into ash bucket, and the heavy metal particles of another part are upwardly into electric discharge
Adsorption zone and purge zone, the heavy metal particles into electric discharge adsorption zone are partially adsorbed on electrode plate after corona discharge, put
The intermittent rotation of the electrode plate in Electro Sorb area is to purge zone and is purged into ash bucket, and flue gas enters after overdischarge adsorption zone
Photochemical catalytic oxidation area, remaining heavy metal particles are in photochemical catalytic oxidation area by catalysis oxidation, and purified flue gas is finally by flue gas
Outlet discharge.
Further, there is equal number of pole plate, wherein positive plate and negative in the electric discharge adsorption zone and purge zone
Distance between pole plate is identical, and drop and relatively small heavy metal arsenic, selenium, lead, mercury etc., which are in contact, is easy trapping in conjunction with generation
Larger particles, grit absorb moisture to which quality increases, and energization corona ionizes ambient gas, dust and liquid in flue gas
Surface charge is dripped, charged particle is mobile to pole plate under the action of electric field force and is enriched with.
Further, the center in the electrostatic precipitation area is additionally provided with main shaft, and the positive plate is all connected with negative plate
In doing intermittent rotation on main shaft and under the drive of main shaft, the frequency of intermittent rotation, which depends on specific operation, to be needed
It wants, the frequency of rotation can be improved when adsorbance increases on pole plate, so as to improve the effect of Electrostatic Absorption.
Further, purging component is equipped in the purge zone, the purging component is set to positive plate and negative plate
Top.
Further, the purging component is pressure-air injector or water jets under high pressure injector, purging component spray
The air or water column of 2~5MPa out is punched into the heavy metal particles on positive plate and negative plate in ash bucket.
The electrostatic precipitation area and spray section is equipped with metal otter board, and the diameter of the mesh on metal otter board is greater than
0.3cm, the metal otter board are equipped with the sprayer sprayed downwards.
Further, the diameter for the water fog particle that the sprayer sprays is 10 μm~200 μm, at water fog particle
It is more advantageous to the reduction of the surface potential energy after it is contacted with heavy metal particles when this range, is more advantageous to the bulky grain newly formed
Stability, so that the sedimentation rate of heavy metal particles is higher, after tested, the water fog particle size of the range is equally beneficial in flue dust
The aggregation and sedimentation of other microparticles.
The ash bucket is the circular platform type structure that internal diameter becomes smaller from top to bottom, and the bottom of the ash bucket is equipped with sewage draining exit,
The heavy metal particles deposited at ash bucket are discharged by sewage draining exit, and the flue dust in ash bucket is accumulated comparatively dense, so that by gas inlet
The flue gas entered directly through spraying zone can not be flowed out from sewage draining exit.
Metal twine and UV lamp are equipped in the photochemical catalytic oxidation area, remaining heavy metal adsorption is in metal mesh in flue gas
On silk, and by catalysis oxidation under the irradiation of UV lamp.
Further, modified TiO is coated on the metal twine2Film, modification TiO2Film is prepared by sol-gel method,
Its particle size is 10nm-80nm, and remaining heavy metal is in TiO in flue gas2Surface is catalytically oxidized to metal oxide, metal
Twine is detachable structure, and replacement or deashing can be carried out after disassembly.In addition, carbon monoxide, oxynitrides in flue gas
Also oxidation reaction occurs here, is changed into non-air pollutant.
Compared with prior art, the present invention is effectively removed for contaminant particle, the heavy metal in flue gas, using wet type
Electrostatic precipitator and de- catalysis oxidation integrated apparatus carry out heavy metal by wet cottrell when flue gas passes through from entrance
Removing, photochemical catalytic oxidation removing is further carried out by light-catalyzed reaction region again, improves the de- of heavy metal on the whole
Except rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that heavy metal device is removed in the present invention；
Fig. 2 is the structural schematic diagram in electrostatic precipitation area in the present invention.
In figure: 3, electrostatic precipitation area, 4, spraying zone, 5, gas inlet, 7, sewage draining exit, 8, ash bucket, 9, UV lamp, 12, flue gas
Outlet, 13, metal twine, 31, electric discharge adsorption zone, 32, purge zone, 33, main shaft, 321, purging component.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
Removing heavy metal device includes electrostatic precipitation area 3, spraying zone 4, gas inlet 5, exhanst gas outlet 12, ash bucket 8 and light
Catalysis oxidation area, referring to Fig. 1, the gas inlet 5 is opened at spraying zone 4, and the photochemical catalytic oxidation area and electric discharge are inhaled
Attached area 31 communicates, and the ash bucket 8 is located at the underface of spraying zone 4.Metal otter board is equipped between electrostatic precipitation area 3 and spraying zone 4,
The diameter of mesh on metal otter board is greater than 0.3cm, and the metal otter board is equipped with the sprayer sprayed downwards.Sprayer spray
The diameter of water fog particle out is 10 μm~200 μm.Ash bucket 8 is the circular platform type structure that internal diameter becomes smaller from top to bottom, ash bucket
8 bottom is equipped with sewage draining exit 7.
Electrostatic precipitation area 3 is set to the surface of spraying zone 4, and it includes muti-piece successively staggered positive plates and cathode
Plate, the electrostatic precipitation area 3 include electric discharge adsorption zone 31 and purge zone 32, referring to fig. 2.Electric discharge adsorption zone 31 and purge zone 32
In have equal number of pole plate, wherein positive plate between negative plate at a distance from it is identical.The center in electrostatic precipitation area 3 is additionally provided with master
Axis 33, the positive plate and negative plate are all connected to do intermittent rotation on main shaft 33 and under the drive of main shaft 33,
The frequency of the rotation for formula of having a rest depends on specific operation needs, and the frequency of rotation can be improved when adsorbance increases on pole plate, with
This improves the effect of Electrostatic Absorption.Purging component 321 is equipped in purge zone 32, referring to Fig. 1, the purging component 321 is set to
The top of positive plate and negative plate.Purging component 321 is pressure-air injector or water jets under high pressure injector.
It is equipped with metal twine 13 and UV lamp 9 in photochemical catalytic oxidation area, is coated with modified TiO on the metal twine 132
Film, remaining heavy metal is in TiO in flue gas2Surface is catalytically oxidized to metal oxide, and metal twine 13 is detachable knot
Structure can carry out replacement or deashing after disassembly.In addition, oxygen also occurs here for the carbon monoxide, oxynitrides in flue gas
Change reaction, is changed into non-air pollutant.
During carrying out practically, flue gas enters spraying zone 4, referring to Fig. 1, the drop that sprays out by gas inlet 5 first
It is combined with the heavy metal particles of part and forms biggish particle and settle into ash bucket 8, the heavy metal particles of another part are to enterprising
Enter to discharge adsorption zone 3 and purge zone 32, and the heavy metal particles into electric discharge adsorption zone 31 are partially adsorbed in after corona discharge
On electrode plate, intermittent 180 ° of rotation of electrode plate for the adsorption zone 31 that discharges are to purge zone 32 and purged into ash bucket 8, referring to
Fig. 2, the heavy metal particles deposited at ash bucket are discharged by sewage draining exit 7.Flue gas enters photochemical catalytic oxidation after overdischarge adsorption zone 3
Area, remaining heavy metal adsorption is on metal twine 13 in flue gas, purified and by catalysis oxidation under the irradiation of UV lamp 9
Flue gas is finally discharged by exhanst gas outlet 12.
Claims (10)
1. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device, which is characterized in that the removing
Heavy metal device includes that electrostatic precipitation area (3), spraying zone (4), gas inlet (5), exhanst gas outlet (12), ash bucket (8) and light are urged
Change zoneofoxidation, the gas inlet (5) is opened at spraying zone (4), and the electrostatic precipitation area (3) is set to spraying zone (4)
Surface, it includes muti-piece, successively staggered positive plate and negative plate, the electrostatic precipitation area (3) include that electric discharge is inhaled
Attached area (31) and purge zone (32), the photochemical catalytic oxidation area are communicated with electric discharge adsorption zone (31), and the ash bucket (8) is located at
The underface of spraying zone (4), flue gas enter spraying zone (4), the drop sprayed out and partial heavy metal by gas inlet (5)
Burl closes to form biggish particle and settle into ash bucket (8), and the heavy metal particles of another part are upwardly into electric discharge adsorption zone (3)
With purge zone (32), the heavy metal particles into electric discharge adsorption zone (31) are partially adsorbed on electrode plate after corona discharge,
The rotation that the electrode plate of electric discharge adsorption zone (31) is intermittent to purge zone (32) and is purged into ash bucket (8), and flue gas is through over-discharge
Electro Sorb area (3) afterwards enter photochemical catalytic oxidation area, remaining heavy metal particles in photochemical catalytic oxidation area by catalysis oxidation, after purification
Flue gas finally by exhanst gas outlet (12) be discharged.
2. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 1,
It is characterized in that there is equal number of pole plate in the electric discharge adsorption zone (31) and purge zone (32), wherein positive plate and negative
Distance between pole plate is identical.
3. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 2,
It is characterized in that, the center in the electrostatic precipitation area (3) is additionally provided with main shaft (33), and the positive plate is all connected to negative plate
Intermittent rotation is done on main shaft (33) and under the drive of main shaft (33).
4. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 3,
Be characterized in that, in the purge zone (32) be equipped with purging component (321), the purging component (321) be set to positive plate with
The top of negative plate.
5. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 4,
It is characterized in that, the purging component (321) is pressure-air injector or water jets under high pressure injector.
6. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 1,
It is characterized in that, metal otter board, the diameter of the mesh on metal otter board is equipped between the electrostatic precipitation area (3) and spraying zone (4)
Greater than 0.3cm, the metal otter board is equipped with the sprayer sprayed downwards.
7. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 6,
It is characterized in that, the diameter for the water fog particle that the sprayer sprays is 10 μm~200 μm.
8. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 1,
It is characterized in that, the ash bucket (8) is the circular platform type structure that internal diameter becomes smaller from top to bottom, and the bottom of the ash bucket (8) is equipped with
Sewage draining exit (7), the heavy metal particles deposited at ash bucket are discharged by sewage draining exit (7).
9. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 1,
It is characterized in that, metal twine (13) and UV lamp (9) is equipped in the photochemical catalytic oxidation area, remaining heavy metal adsorption in flue gas
On metal twine (13), and by catalysis oxidation under the irradiation of UV lamp (9).
10. a kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device according to claim 9,
It is characterized in that, is coated with modified TiO on the metal twine (13)2Film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811135191.7A CN109013058A (en) | 2018-09-27 | 2018-09-27 | A kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device |
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| CN201811135191.7A CN109013058A (en) | 2018-09-27 | 2018-09-27 | A kind of high-efficient wet-type electrostatic precipitator catalysis oxidation joint removing heavy metal device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999652A (en) * | 2019-04-08 | 2019-07-12 | 上海电力学院 | Boiler fired coal flue gas purification device |
| CN110449017A (en) * | 2019-08-13 | 2019-11-15 | 上海电力大学 | A kind of lye injection promotes the device of WESP removing arsenic selenium lead heavy metal |
| CN110449021A (en) * | 2019-08-13 | 2019-11-15 | 上海电力大学 | Twin-stage absorption cooperates with the WESP device of efficient removal heavy metal with twin-stage spray |
| CN113351370A (en) * | 2021-06-30 | 2021-09-07 | 上海电力大学 | Composite electrostatic dust collection device for removing arsenic, selenium and lead in flue gas |
| CN113769767A (en) * | 2021-09-30 | 2021-12-10 | 华北电力大学（保定） | Conductive catalytic membrane, preparation method thereof and method for purifying flue gas by coupling conductive catalytic membrane with ozone |
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| 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999652A (en) * | 2019-04-08 | 2019-07-12 | 上海电力学院 | Boiler fired coal flue gas purification device |
| CN110449017A (en) * | 2019-08-13 | 2019-11-15 | 上海电力大学 | A kind of lye injection promotes the device of WESP removing arsenic selenium lead heavy metal |
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| CN113351370A (en) * | 2021-06-30 | 2021-09-07 | 上海电力大学 | Composite electrostatic dust collection device for removing arsenic, selenium and lead in flue gas |
| CN113769767A (en) * | 2021-09-30 | 2021-12-10 | 华北电力大学（保定） | Conductive catalytic membrane, preparation method thereof and method for purifying flue gas by coupling conductive catalytic membrane with ozone |
| CN113769767B (en) * | 2021-09-30 | 2023-06-09 | 华北电力大学（保定） | Conductive catalytic film, preparation method thereof and method for purifying flue gas by coupling ozone through conductive catalytic film |
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