CN202270577U - Device for removing PM2.5 (particle matter less than 2.5 micrometers in diameter) in smoke - Google Patents
Device for removing PM2.5 (particle matter less than 2.5 micrometers in diameter) in smoke Download PDFInfo
- Publication number
- CN202270577U CN202270577U CN2011203155595U CN201120315559U CN202270577U CN 202270577 U CN202270577 U CN 202270577U CN 2011203155595 U CN2011203155595 U CN 2011203155595U CN 201120315559 U CN201120315559 U CN 201120315559U CN 202270577 U CN202270577 U CN 202270577U
- Authority
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- China
- Prior art keywords
- removes
- tower
- flue gas
- dust
- collection plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000002245 particle Substances 0.000 title claims abstract description 27
- 239000000779 smoke Substances 0.000 title abstract 7
- 239000000428 dust Substances 0.000 claims abstract description 66
- 238000009736 wetting Methods 0.000 claims abstract description 18
- 239000012716 precipitator Substances 0.000 claims abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 35
- 239000003546 flue gas Substances 0.000 claims description 35
- 239000007789 gas Substances 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 17
- 238000004581 coalescence Methods 0.000 claims description 16
- 239000003245 coal Substances 0.000 abstract description 7
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 239000002923 metal particle Substances 0.000 abstract description 3
- 239000003595 mist Substances 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract 3
- 230000015271 coagulation Effects 0.000 abstract 1
- 238000005345 coagulation Methods 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 239000008187 granular material Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 240000002853 Nelumbo nucifera Species 0.000 description 4
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 4
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000011955 best available control technology Methods 0.000 description 1
- 208000030303 breathing problems Diseases 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- -1 steam etc. Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
- Electrostatic Separation (AREA)
Abstract
The utility model discloses a device for removing PM2.5 (particle matter less than 2.5 micrometers in diameter) in smoke, which comprises a removal tower, a wet type electric precipitator and a wetting spraying device. A smoke inlet end is arranged at the lower portion of the removal tower and is provided with a particle charged area and a mixing coagulation area. The particle charged area is divided into a positive corona discharge area and a negative corona discharge area, a positive electrode is arranged in the positive corona discharge area, and a negative electrode is arranged in the negative corona discharge area. At least a first stage wetting spraying device is arranged in the removal tower at the upper portion of the smoke inlet end, the wet type electric precipitator is arranged in the removal tower above the wetting spraying device, and a smoke outlet is arranged at the top of the removal tower. The device for removing the PM2.5 in the smoke has the advantages of being capable of removing fine dust of the PM2.5 in fire coal and fine particles of acid mist, heavy metal particles and the like in the smoke. In addition, the removal rate of the PM2.5 is greater than or equal to 95%.
Description
Technical field
The utility model relates to a kind of PM in the flue gas that removes
2.5Device.
Background technology
PM
2.5Fine dust is meant the particulate pollutant of aerodynamic diameter less than 2.5 μ m; It is the key factor that causes breathing problem to propagate; These particles are suspended in not sedimentation in the air for a long time; And carrying bacterium and virus easily, its 80% particle can get in the alveolar of human body, is the one of the main reasons that causes PUD D.In order to prevent PM
2.5Particle is to the mankind's harm, the U.S. as far back as 1997 just at original PM
10Standard on increased PM
2.5Discharge standard, and the regulation PM
2.5Three annual year concentration be lower than 15 μ g/m
3, average 99% 24h concentration is lower than 15 μ g/m in 3 years
3
Coal-fired plant flue gas is PM
2.5One of huge emission source.The basic characteristics of China's energy resources are rich coal, oil-poor, weak breath, and the coal resources total amount is considerably beyond the oil and natural gas resource, and the dust burdening of coal in China is higher.The ratio of coal in China in national primary energy production and consumption accounts for more than 70% for a long time, and the Dust Capacity that discharges in the coal-fired flue-gas is huge, though total particle dust TSP discharging is downward trend year by year, because to PM
2.5Fine dust lack Best available control technology, cause PM
2.5Discharge capacity is from 1,000 ten thousand tons of rising to 2007 of 7,500,000 tons in 2000.Along with people's all the raising that requires of living environment quality and environmental protection standard require more and more stricter, PM
2.5Fine dust will become the important factor of environment protection emission control, and existing Dust Control Technology and equipment are to PM
2.5The ability that removes very little, exploitation efficiently removes PM
2.5The technology of fine dust is imperative with device.
The utility model content
The purpose of the utility model is to provide a kind of PM in the flue gas that removes
2.5Device, can effectively solve existing Dust Control Technology and equipment to PM
2.5The ability that removes very little, cause very big environmental pollution problems.
In order to solve the problems of the technologies described above, the utility model is realized through following technical scheme: a kind ofly remove PM in the flue gas
2.5Device; Comprise removing tower, wet electrical dust precipitator, wetting spray equipment, the said bottom that removes tower is provided with the gas approach end, and the said gas approach end that removes tower is provided with the particle charging area, mixes the coalescence district; Said particle charging area is divided into positive corona region of discharge and negative corona discharge district; Be provided with positive electrode in the said positive corona region of discharge, said negative corona discharge is provided with negative electrode in the district, and removing of said gas approach end top is provided with the wetting spray equipment of one-level at least in the tower; Said wet electrical dust precipitator is arranged on removing in the tower of wetting spray equipment top, and the said top that removes tower is provided with exhanst gas outlet.
Preferably, the inwall in said mixing coalescence district is provided with some baffle plates; Quicken the mixing of two kinds of different electric charge dust granules.
Preferably; Said wet electrical dust precipitator comprises corona wire, dust collection plate, moisture film generating means, electric control gear; Said corona wire and dust collection plate all vertically are arranged on and remove in the tower; Said corona wire all links to each other with electric control gear with dust collection plate, and said moisture film generating means is arranged on said corona wire and dust collection plate top; Being convenient to dust collection plate better collects by the dust of ionization.
Preferably, the spacing of corona wire and dust collection plate is 15～30mm; Can make dust granules by charged preferably between distance regions.
Preferably, removing of said gas approach end below is provided with collecting tank in the tower, and the said sidewall that removes tower is provided with the circulating pump that communicates with collecting tank, and said circulating pump also links to each other with wetting spray equipment; Sprayed slurry is recycled, reduce production costs.
Preferably, the said bottom that removes tower also is provided with the excavationg pump that communicates with collecting tank; The convenient discharges such as deposit that will remove tower bottom.
Compared with prior art, the utility model has the advantages that: make PM through electric charge gravitation
2.5The effect of fine dust generation coalescence forms bigger granule dust, removes from flue gas through the granule dust of wet electrical dust precipitator after with coalescence then, not only can remove the fine dust PM in the fire coal
2.5, can also remove subparticles such as acid mist in the flue gas, heavy metal particles, PM
2.5Clearance>=95%.
Description of drawings
Fig. 1 removes PM in the flue gas for the utility model is a kind of
2.5The structural representation of device.
The specific embodiment
Consult Fig. 1 and remove PM in the flue gas for the utility model is a kind of
2.5The embodiment of device, a kind ofly remove PM in the flue gas
2.5Device; Comprise removing tower 6, wet electrical dust precipitator 4, wetting spray equipment 34, the said bottom that removes tower 6 is provided with the gas approach end, and the said gas approach end that removes tower 6 is provided with particle charging area 1, mixes coalescence district 2; Said particle charging area 1 is divided into positive corona region of discharge 11 and negative corona discharge district 12; Be provided with positive electrode in the said positive corona region of discharge 11, be provided with negative electrode in the said negative corona discharge district 12, removing of said gas approach end top is provided with the wetting spray equipment 34 of one-level at least in the tower 6; Said wet electrical dust precipitator 4 is arranged on removing in the tower 6 of wetting spray equipment 34 tops; The said top that removes tower 6 is provided with exhanst gas outlet 5, and the inwall in said mixing coalescence district 2 is provided with some baffle plates 21, and said wet electrical dust precipitator 4 comprises corona wire 41, dust collection plate 42, moisture film generating means 43, electric control gear 44; Said corona wire 41 all vertically is arranged on dust collection plate 42 and removes in the tower 6; Said corona wire 41 all links to each other with electric control gear 44 with dust collection plate 42, and said moisture film generating means 43 is arranged on said corona wire 41 and dust collection plate 42 tops, and corona wire 41 is 15～30mm with the spacing of dust collection plate 42; Removing of said gas approach end below is provided with collecting tank 31 in the tower 6; The said sidewall that removes tower 6 is provided with the circulating pump 33 that communicates with collecting tank 31, and said circulating pump 33 also links to each other with wetting spray equipment 34, and the said bottom that removes tower 6 also is provided with the excavationg pump 32 that communicates with collecting tank 31
A kind ofly remove PM in the flue gas
2.5Method, may further comprise the steps successively:
A. particle is charged: flue gas is passed through different electrodes, the PM in the flue gas by five equilibrium
2.5Fine dust has different electric charges through positive electrode or negative electrode;
B. mix coalescence: through the PM after the steps A
2.5Fine dust gets into and mixes coalescence district 2, and lotus has the PM of positive electricity or negative electricity
2.5Fine dust mixes, and makes lotus have the particle generation coalescence effect of different electric charges to form the bigger dust granules of particle through the electric charge graviational interaction;
C. dust is wetting modified: carry out modifiedly through the effect of water spray through forming the bigger dust granules of particle behind the step B, make the dust moistened surface, charged ability is significantly improved;
D. wet-esp: the dust granules that rises again gets in the wet scrubber, and dust is being deposited on the dust collection plate 42 under the effect of electric field force by charged, and along with moisture film flows into collecting tank 31, dust granules removes from flue gas, and flue gas is purified.
The coal fired power generation unit of 300MW, coal-fired sulfur content are about 2.0%, and the exhaust gas volumn that boiler produces is 1,800,000 Nm
3About/h, SO
2Content 5500mg/Nm
3About; Flue gas that boiler comes out at first removes nitrogen oxide in the flue gas through SCR (or SNCR) through behind the economizer, with after dry electrostatic cleaner ESP or sack cleaner; Mainly remove the dust granules of kinetic diameter greater than 2.0 μ m; Remove the oxysulfide in the flue gas through traditional WFGD device then, WFGD outlet flue gas gets into this contrive equipment, further removes the PM in the flue gas
2.5, heavy metal, acid mist, steam etc., flue gas at first gets into particle charging area 1 and is divided into two parts, a part of fine dust gets into positive corona region of discharge 11 by lotus positive electricity; Another part gets into negative corona discharge district 12 by the bear electricity, and two parts lotus has the particle of different electric charges to get into mixing coalescence district 2 with flue gas, and the coalescence effect takes place under electric charge gravitation the powder dust particle that contains different electric charges; The mutual coalescence of two or more particles becomes big dust particle, and flue gas gets into the wetting modified district of dust then, wetted spray equipment 34 sprays of contaminant particles such as the powder dust particle behind the coalescence, heavy metal particles; The surface is by moistening; For the follow-up charged modified preparation of doing, the granule dust that carries after modified of flue gas gets into wet electrical dust precipitator 4, corona wire 41 discharges subsequently; Particle is by charged and get off in the effect of electric field force and to be deposited on the dust collection plate 42; Field gas velocity is 1.0～2.0m/s, and migration velocity is 0.8～1.5mm/s, and the moisture film on the dust collection plate 42 that moisture film generating means 43 sprays form gets into collecting tank 31 with the pollutant flushing of sedimentation; The part be recycled pump 33 squeeze into 34 pairs of particles of wetting spray equipment carry out modified, the part by waste water excavationg pump 32 discharge systems.Behind above device, the fine dust coalescence in the flue gas becomes bigger granule dust to be removed by wet scrubber, and flue gas is purified, and flue gas after being purified enters chimney through exhanst gas outlet 5.In the outlet flue gas, PM
2.5≤20 μ g/Nm
3, Hg≤3 μ g/Nm
3, SO
3Aerosol≤8 μ g/m
3
The above is merely the specific embodiment of the utility model; But the technical characterictic of the utility model is not limited thereto; Any those skilled in the art is in the field of the utility model, and variation of being done or modification all are encompassed among the claim of the utility model.
Claims (6)
1. one kind removes flue gas PM
2.5Device; It is characterized in that: comprise removing tower (6), wet electrical dust precipitator (4), wetting spray equipment (34); The said bottom that removes tower (6) is provided with the gas approach end; The said gas approach end that removes tower (6) is provided with particle charging area (1), mixes coalescence district (2), and said particle charging area (1) is divided into positive corona region of discharge (11) and negative corona discharge district (12), is provided with positive electrode in the said positive corona region of discharge (11); Be provided with negative electrode in the said negative corona discharge district (12); Removing of said gas approach end top is provided with the wetting spray equipment of one-level (34) at least in the tower (6), said wet electrical dust precipitator (4) is arranged on removing in the tower (6) of wetting spray equipment (34) top, and the said top that removes tower (6) is provided with exhanst gas outlet (5).
2. a kind of PM in the flue gas that removes as claimed in claim 1
2.5Device, it is characterized in that: the inwall in said mixing coalescence district (2) is provided with some baffle plates (21).
3. a kind of PM in the flue gas that removes as claimed in claim 1
2.5Device; It is characterized in that: said wet electrical dust precipitator (4) comprises corona wire (41), dust collection plate (42), moisture film generating means (43), electric control gear (44); Said corona wire (41) and dust collection plate (42) all vertically are arranged on and remove in the tower (6); Said corona wire (41) all links to each other with electric control gear (44) with dust collection plate (42), and said moisture film generating means (43) is arranged on said corona wire (41) and dust collection plate (42) top.
4. a kind of PM in the flue gas that removes as claimed in claim 3
2.5Device, it is characterized in that: the spacing of corona wire (41) and dust collection plate (42) is 15～30mm.
5. a kind of PM in the flue gas that removes as claimed in claim 1
2.5Device, it is characterized in that: removing of said gas approach end below is provided with collecting tank (31) in the tower (6), the said sidewall that removes tower (6) is provided with the circulating pump (33) that communicates with collecting tank (31), and said circulating pump (33) also links to each other with wetting spray equipment (34).
6. a kind of PM in the flue gas that removes as claimed in claim 5
2.5Device, it is characterized in that: the said bottom that removes tower (6) also is provided with the excavationg pump (32) that communicates with collecting tank (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203155595U CN202270577U (en) | 2011-08-26 | 2011-08-26 | Device for removing PM2.5 (particle matter less than 2.5 micrometers in diameter) in smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203155595U CN202270577U (en) | 2011-08-26 | 2011-08-26 | Device for removing PM2.5 (particle matter less than 2.5 micrometers in diameter) in smoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202270577U true CN202270577U (en) | 2012-06-13 |
Family
ID=46190968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203155595U Expired - Lifetime CN202270577U (en) | 2011-08-26 | 2011-08-26 | Device for removing PM2.5 (particle matter less than 2.5 micrometers in diameter) in smoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202270577U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430478A (en) * | 2011-08-26 | 2012-05-02 | 浙江菲达脱硫工程有限公司 | Remove PM in flue gas2.5Apparatus and method of |
| CN103567070A (en) * | 2012-10-12 | 2014-02-12 | 原皓 | Corrosion-resistant dust collection electrode and wet dust collector with same |
| CN105921276A (en) * | 2016-05-23 | 2016-09-07 | 中国矿业大学 | Fine particle rotational flow type electric agglomeration dust removing and collecting device |
| CN106984117A (en) * | 2016-01-20 | 2017-07-28 | 浙江大学自贡创新中心 | A kind of flue gas dust collecting system |
-
2011
- 2011-08-26 CN CN2011203155595U patent/CN202270577U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430478A (en) * | 2011-08-26 | 2012-05-02 | 浙江菲达脱硫工程有限公司 | Remove PM in flue gas2.5Apparatus and method of |
| CN103567070A (en) * | 2012-10-12 | 2014-02-12 | 原皓 | Corrosion-resistant dust collection electrode and wet dust collector with same |
| CN106984117A (en) * | 2016-01-20 | 2017-07-28 | 浙江大学自贡创新中心 | A kind of flue gas dust collecting system |
| CN105921276A (en) * | 2016-05-23 | 2016-09-07 | 中国矿业大学 | Fine particle rotational flow type electric agglomeration dust removing and collecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |
|
| CX01 | Expiry of patent term |