CN103495504A - Multi-level charging coagulation device for removing fine dust and mercury - Google Patents
Multi-level charging coagulation device for removing fine dust and mercury Download PDFInfo
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- CN103495504A CN103495504A CN201310447465.7A CN201310447465A CN103495504A CN 103495504 A CN103495504 A CN 103495504A CN 201310447465 A CN201310447465 A CN 201310447465A CN 103495504 A CN103495504 A CN 103495504A
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Abstract
The invention discloses a multi-level charging coagulation device for high-efficient removal of fine dust and mercury. The multi-level charging coagulation device comprises a housing, wherein a charging area is arranged at the front part in the housing, a coagulation area is arranged at the middle part, and a re-charging area is arranged at the back part. The device is suitable for efficiency-improving transformation of an existing electrostatic precipitator, and by arranging the re-charging area, the capture efficiency of the fine dust is further improved; the element-state mercury is transformed to the oxidation state mercury after a plurality of times of oxidation and is more easily converted to the granule state mercury by dust adsorption, so that the high-efficient removal of the mercury in a subsequent device is further realized. The removal efficiency of the device against the fine dust and the mercury respectively achieves 99.8% and 68%; the device is of simple structure, when the device is used, the precipitator does not need to be changed, offline construction and maintenance can be performed, the maintenance workload is small, and the working is stable and reliable.
Description
Technical field
The present invention relates to a kind of dust arrester, be specifically related to a kind of multi-lever electric coacervation device that removes fine dust and mercury.
Background technology
Fine dust and mercury are the contained major pollutants of coal steam-electric plant smoke.Fine dust can deposit in the human body alveolar, causes the generation of the PUD Ds such as silicosis; Mercury belongs to the chemical substance with serious physiology toxicity, can enter human body by respiratory tract, esophagus and skin, and human body sucks excessive mercury also can cause mercury poisoning.
" fossil-fuel power plant atmospheric pollutant emission standard " GB13223-2011 that China came into effect from 2011, granular material discharged standard is from 50mg/m
3bring up to 20～30mg/m
3, include the Mercury In The Air concentration of emission in the binding indicator requirement first simultaneously, clear and definite Mercury In The Air content must not surpass 0.03mg/m
3.Existing high-efficiency dust remover, apply maximum as electric cleaner, sack cleaner, cyclone dust collectors etc., although total dust emission concentration is not high, due to the restriction that is subject to mechanism, lower to the subparticle arresting efficiency of 1 μ m left and right.Along with the raising day by day of environmental emission standard, utilize investment and operating cost still less, improve the arresting efficiency to fine dust, become the effective means that existing high-efficiency dust remover is put forward effect.
Mercury in flue gas comprises elemental mercury (Hg
0), oxidation state mercury (Hg
2+) and particle mercury (Hg
p) three kinds, their removal difficulty reduces successively.Research shows, the mercury in flue gas mainly exists with the form of elemental mercury and oxidation state mercury, and particle mercury is below 20%.Particle mercury can remove by deduster, and oxidation state mercury can remove in system and effectively remove in wet type; Elemental mercury is owing to being gaseous state, and hydrophily is poor, so traditional deduster and wet type lotion system are all very low to its removal efficiency.Therefore, increasingly strict along with the mercury emissions standard, adopt suitable device to realize efficiently removing imperative.
Electric cleaner is because the characteristics such as its efficient stable, reliable operation, easy maintenance are widely used.But in recent years,, along with the raising day by day of environmental protection standard, be badly in need of electric cleaner is transformed.In order to tackle new situation, Retrofit on electrostatic precipitator adopts electricity to change the conventional measures such as bag, increasing device specification, increase electric field number usually, but sack cleaner temporarily also can't replace electric cleaner fully due to himself defect, conventional Retrofit on electrostatic precipitator measure exists that improvement expenses is high usually, long construction period, affected by the unfavorable factor such as place limitation, often is difficult to realize.
The patent documentation that publication number is CN202006137U discloses a kind of ultrafine dust electrocoagulation device, and this device is connected with flue, comprising: housing, and an end is smoke inlet, the other end is exhanst gas outlet; Several to sparking electrode, be fixed in housing, every pair of sparking electrode comprises positive and negative sparking electrode, several sparking electrode is arranged in parallel with every pair of positive and negative program and flue gas turnover direction in housing, forms the electrode group; The several piece earth plate, be individually fixed between every 2 electrodes in the interior electrode group of described housing; Several to the cohesion electrode, stationary distribution is nearly smoke outlet in housing, by conductive material, is made.
Fine dust is after the cohesion increase of the disclosed coacervation device of above-mentioned patent documentation, also need through electric dust collector to remove coarse granule, because the dust collection plate of general electric dust collector is positive plate, the particle of some positively charged has little time in condensation region and the negative electrical charge particle aggregation, cause positively charged particle to be difficult to arrive dust collection plate in electric cleaner and directly discharge, all unfavorable for dedusting and demercuration
Summary of the invention
The invention provides a kind of multi-lever electric coacervation device that removes fine dust and mercury, by charging area again is set, further improve the arresting efficiency of fine dust; Make elemental mercury through repeatedly after oxidation, being converted into oxidation state mercury simultaneously, more easily by adsorbing powder dust, be converted to particle mercury, thereby realize mercury efficiently removing in follow-up equipment.
The invention discloses a kind of multi-lever electric coacervation device that removes fine dust and mercury, comprise housing, in described housing, front portion is provided with charging area, and middle part is provided with condensation region, and rear portion is provided with charging area again;
In described charging area, be fixed with several to sparking electrode, every pair of sparking electrode comprises positive sparking electrode and the first negative sparking electrode, several to sparking electrode in housing often aligning sparking electrode, the first negative sparking electrode is arranged in parallel along the shell length direction, form the electrode group, each first negative sparking electrode connects negative high voltage power source, and each positive sparking electrode connects the positive high voltage power supply; Parallelly between adjacent two positive sparking electrodes and the first negative sparking electrode be provided with first earth plate, all the first earth plates connect, and are connected with grounded screen;
Be provided with the cohesion electrode that place several vertical shell bottom in described condensation region;
In described charging area again, be fixed with the second negative sparking electrode of the parallel placement of array along the shell length direction, each second negative sparking electrode connects negative high voltage power source; Parallelly between adjacent two the second negative sparking electrodes be provided with second earth plate, all the second earth plates connect, and are connected with grounded screen.
As preferably, several in described charging area sparking electrode be at least two pairs, high voltage source is provided with two cover transformers, and two overlap switch boards.
In described charging area, each positive sparking electrode, the first negative sparking electrode all and between the housing junction are provided with insulating materials.
Described cohesion electrode can be cylindrical, elliptical cylinder-shape, frid shape, narrow boards shape or gusset shape, as preferably, described cohesion electrode is cylindrical, adopts cylindrical cohesion electrode can reduce resistance, improve the effect that cohesion mixes, thereby improve dedusting and demercuration efficiency.
As preferably, the diameter of described cylindrical cohesion electrode equals charging area adjacent positive plate and the first negative plate spacing, and the quantity of described cohesion electrode is at least 2 times of sparking electrode quantity.Described cohesion electrode material is nonmetallic wear-resistant material.
As preferably, the described adjacent plate of charging area again spacing equals the polar plate spacing of the adjacent positive sparking electrode of charging area and the first negative sparking electrode; The described pole plate of charging area again length is 1/20～1/2 of charging area pole plate length.Consider aggregation efficiency and manufacturing cost, charging area pole plate length is preferably in above-mentioned scope again.
As preferably, be provided with insulating materials between each second negative sparking electrode of described charging area again and base plate, high voltage source is provided with a set of transformer, a set of switch board.
As preferably, the voltage of the described high voltage source of charging area again is 40～300KV; 130～300KV more preferably.High pressure is beneficial to removing of mercury, but the power supply manufacture difficulty of overtension increases.
As preferably, described shell material is straight carbon steel.
The operation principle of the multi-lever electric coacervation device that removes fine dust and mercury of the present invention is as follows: fine dust is at first by the charging area of multi-lever electric coacervation device, at charging area bear electricity and positive electricity respectively, in condensation region, is condensed into larger particles; Big dust particle after uncongealed fine dust or cohesion negative electricity on charging area band again, match with the anode dust collection plate in follow-up electric cleaner.Due to some particle charging area lotus positive electricity afterwards not as good as and the negative electrical charge particle aggregation, enter follow-up electric precipitation unfavorable to dedusting, thus on charging area band again negative electricity, can increase the efficiency of dust collection of electric precipitation, again improved the arresting efficiency of fine dust.Simultaneously, the multi-lever electric coacervation device makes elemental mercury repeatedly be oxidized to oxidation state mercury, more easily by adsorbing powder dust, is converted to particle mercury, thereby realizes mercury efficiently removing in follow-up equipment.
The beneficial effect of this device:
This device is specially adapted to carrying of existing electric cleaner and imitates transformation, in order to improve the removal efficiency of fine dust and mercury.Its electro-coagulation equipment can be arranged on the flue before the deduster import, flue gas is after its device, fine particle can condense increase, negative electricity on charging area fine powder dust lane again, with the anode dust collection plate in follow-up electric cleaner, match, increase the efficiency of dust collection of electric precipitation, again improved the arresting efficiency of fine dust; Simultaneously, elemental mercury repeatedly is oxidized to oxidation state mercury, is easier to be converted to particle mercury by flying dust absorption, thereby improves the removal efficiency of follow-up equipment to fine dust and mercury.Can improve existing deduster to the removing of PM2.5 subparticle and mercury, effectively improve ambient air quality.Its apparatus structure is simple, during use without deduster is changed, but off-line construction and maintenance, maintenance workload is little, working stability is reliable.
The accompanying drawing explanation
The structural representation that Fig. 1 is apparatus of the present invention;
The top view that Fig. 2 is apparatus of the present invention.
The specific embodiment
The specific embodiment below in conjunction with the accompanying drawing of embodiment to this method is elaborated.
Referring to Fig. 1～2, apparatus of the present invention comprise housing 1, and in housing, front portion is provided with charging area, and middle part is provided with condensation region, and rear portion is provided with charging area again.
Be fixed with six pairs of sparking electrodes in described charging area, every pair of sparking electrode comprises the first negative sparking electrode 2 and positive sparking electrode 4, the six pairs of sparking electrodes in housing 1 often aligning, the first negative sparking electrode is arranged in parallel along the shell length direction, form the electrode group, each first negative sparking electrode 2 connects negative high voltage power source (not shown), and each positive sparking electrode 4 connects positive high voltage power supply (not shown).Each just, adopt polytetrafluoroethylene (PTFE) as insulating materials between the first negative sparking electrode and housing junction.This sparking electrode jaggies forms.Adjacent two just, parallelly between the first negative sparking electrode be provided with first earth plate 3, all the first earth plates 3 connect, and are connected (not shown) with grounded screen.
Be provided with the cylindrical cohesion electrode 5 that place vertical shell bottom in described condensation region, its diameter equals that charging area is adjacent just, the first negative plate spacing.The cohesion electrode arrangement becomes three row, six cohesion electrodes 5 are arranged in every row, the negative sparking electrode of the center of the cylindrical cohesion electrode of first row and charging area is on same straight line, the center of the cylindrical cohesion electrode of secondary series and the positive sparking electrode of charging area are on same straight line, the center of the cylindrical cohesion electrode of the 3rd row and the negative sparking electrode of charging area are on same straight line, and the material of this cylindrical cohesion electrode is pottery.
In described charging area again, be fixed with the second negative sparking electrode of six pairs of parallel placements along the shell length direction, the adjacent plate spacing equals that charging area is adjacent just, the first negative plate spacing, and pole plate length is 1/5 of charging area pole plate length.Each second negative sparking electrode 6 connects negative high voltage power source (not shown), between each second negative sparking electrode 6 and housing, adopts polytetrafluoroethylene (PTFE) as insulating materials.Parallelly between adjacent two the second negative sparking electrodes be provided with second earth plate 7, all the second earth plates connect, and are connected with grounded screen (not shown).
This efficiently removes in the multi-lever electric coacervation device of fine dust and mercury:
(1) knockouts internal electric field wind speed is 5m/s;
(2) the positive and negative DC high-voltage power supply that the charging area power supply mode is Frequency Adjustable, be connected with positive and negative sparking electrode respectively, and supply voltage is 80kV.The negative dc high voltage power supply that the charging area power supply mode is Frequency Adjustable again, supply voltage is 200kV.
The charging area supply voltage is 80kV more in this embodiment, adopts and the identical device of embodiment 1.
Comparative Examples
In this Comparative Examples, remove again outside charging area identical device in employing and embodiment 1.
Application examples 1:
Waste gas inlet, containing 45 μ g/m
3mercury and 11g/m
3flue dust, flow is 100000m
3/ h, after the multi-lever electric coacervation device and conventional electric cleaner of embodiment 1, mercury and dust concentration are reduced to respectively 13 μ g/m
3and 20mg/m
3, the removal efficiency of mercury and flue dust is respectively 71.1% and 99.8%;
After the multi-lever electric coacervation device and conventional electric cleaner of embodiment 2, mercury and dust concentration are reduced to respectively 15 μ g/m
3and 28mg/m
3, the removal efficiency of mercury and flue dust is respectively 66.7% and 99.7%;
After the charged coacervation device of the single-stage of Comparative Examples and conventional electric cleaner, mercury and dust concentration are reduced to respectively 26 μ g/m
3and 80mg/m
3, the removal efficiency of mercury and flue dust is respectively 42.2% and 99.3%.
Application examples 2:
Waste gas inlet, containing 82 μ g/m
3mercury and 9g/m
3flue dust, flow is 500000m
3/ h, after the multi-lever electric coacervation device and conventional electric cleaner of embodiment 1, mercury and dust concentration are reduced to respectively 26 μ g/m
3and 15mg/m
3, the removal efficiency of mercury and flue dust is respectively 68.3% and 99.8%;
After the multi-lever electric coacervation device and conventional electric cleaner of embodiment 2, mercury and dust concentration are reduced to respectively 29 μ g/m
3and 23mg/m
3, the removal efficiency of mercury and flue dust is respectively 64.6% and 99.7%;
After the charged coacervation device of the single-stage of Comparative Examples and conventional electric cleaner, mercury and dust concentration are reduced to respectively 51 μ g/m
3and 70mg/m
3, the removal efficiency of mercury and flue dust is respectively 37.8% and 99.2%.
The above; be only the preferably specific embodiment of this method, but the protection domain of this method is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in the protection domain of this method.Therefore, the protection domain of this method should be as the criterion with the protection domain of claim.
Claims (10)
1. a multi-lever electric coacervation device that removes fine dust and mercury, comprise housing, it is characterized in that, in described housing, front portion is provided with charging area, and middle part is provided with condensation region, and rear portion is provided with charging area again;
In described charging area, be fixed with several to sparking electrode, every pair of sparking electrode comprises positive sparking electrode and the first negative sparking electrode, several to sparking electrode in housing often aligning sparking electrode, the first negative sparking electrode is arranged in parallel along the shell length direction, form the electrode group, each first negative sparking electrode connects negative high voltage power source, and each positive sparking electrode connects the positive high voltage power supply; Parallelly between adjacent two positive sparking electrodes and the first negative sparking electrode be provided with first earth plate, all the first earth plates connect, and are connected with grounded screen;
Be provided with the cohesion electrode that place several vertical shell bottom in described condensation region;
In described charging area again, be fixed with the second negative sparking electrode of the parallel placement of array along the shell length direction, each second negative sparking electrode connects negative high voltage power source; Parallelly between adjacent two the second negative sparking electrodes be provided with second earth plate, all the second earth plates connect, and are connected with grounded screen.
2. the multi-lever electric coacervation device that removes fine dust and mercury as claimed in claim 1, is characterized in that, several in described charging area sparking electrode be at least 2 pairs, and high voltage source is provided with two cover transformers, and two overlap switch boards.
3. the multi-lever electric coacervation device that efficiently removes fine dust and mercury as claimed in claim 2, is characterized in that, in described charging area, between each positive sparking electrode and the first negative sparking electrode and base plate, is provided with insulating materials.
4. the multi-lever electric coacervation device that removes fine dust and mercury as claimed in claim 1, it is characterized in that, described cohesion electrode is cylindrical, and its diameter equals charging area adjacent positive plate and the first negative plate spacing, and the quantity of described cohesion electrode is at least 2 times of sparking electrode quantity.
5. the multi-lever electric coacervation device that efficiently removes fine dust and mercury as claimed in claim 4, is characterized in that, described cohesion electrode material is nonmetallic wear-resistant material.
6. the multi-lever electric coacervation device that efficiently removes fine dust and mercury as claimed in claim 1, is characterized in that, the described adjacent plate of charging area again spacing equals the polar plate spacing of the adjacent positive sparking electrode of charging area and the first negative sparking electrode; The described pole plate of charging area again length is 1/20～1/2 of charging area pole plate length.
7. the multi-lever electric coacervation device that efficiently removes fine dust and mercury as claimed in claim 6, is characterized in that, between each second negative sparking electrode of described charging area again and base plate, is provided with insulating materials, and high voltage source is provided with a set of transformer, a set of switch board.
8. the multi-lever electric coacervation device that efficiently removes fine dust and mercury as claimed in claim 7, is characterized in that, the voltage of the described inner high voltage of charging area again power supply is 40～300KV.
9. the multi-lever electric coacervation device that efficiently removes fine dust and mercury as claimed in claim 8, is characterized in that, the voltage of the described inner high voltage of charging area again power supply is 130～300KV.
10. the multi-lever electric coacervation device that efficiently removes fine dust and mercury as claimed in claim 1, is characterized in that, described shell material is straight carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310447465.7A CN103495504A (en) | 2013-09-26 | 2013-09-26 | Multi-level charging coagulation device for removing fine dust and mercury |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310447465.7A CN103495504A (en) | 2013-09-26 | 2013-09-26 | Multi-level charging coagulation device for removing fine dust and mercury |
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| CN103495504A true CN103495504A (en) | 2014-01-08 |
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| CN201310447465.7A Pending CN103495504A (en) | 2013-09-26 | 2013-09-26 | Multi-level charging coagulation device for removing fine dust and mercury |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106999948A (en) * | 2014-11-26 | 2017-08-01 | 拉兹洛·舒勒穆尔 | Method, filter module and air cleaning facility |
| CN107952321A (en) * | 2017-10-17 | 2018-04-24 | 上海交通大学 | Promote the device and method of trickle lead dust reunion and mercury oxidation in flue gas |
| CN109499760A (en) * | 2018-11-05 | 2019-03-22 | 河南博联慧绿环保科技有限公司 | A kind of novel cooking fume exhauster gas and oil separating plant |
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| CN202006137U (en) * | 2011-01-13 | 2011-10-12 | 宝山钢铁股份有限公司 | Ultrafine dust electrocoagulation device |
| CN202590955U (en) * | 2011-12-28 | 2012-12-12 | 宝山钢铁股份有限公司 | Three-area electric coagulation dust catcher |
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Patent Citations (5)
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| CN2905225Y (en) * | 2006-01-25 | 2007-05-30 | 武汉凯迪蓝天科技有限公司 | Multi-stage combined static dust collector |
| CN201154327Y (en) * | 2007-12-29 | 2008-11-26 | 武汉科技大学 | Three-zone dipolar loading electrostatic agglomeration dust remover |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106999948A (en) * | 2014-11-26 | 2017-08-01 | 拉兹洛·舒勒穆尔 | Method, filter module and air cleaning facility |
| CN107952321A (en) * | 2017-10-17 | 2018-04-24 | 上海交通大学 | Promote the device and method of trickle lead dust reunion and mercury oxidation in flue gas |
| CN107952321B (en) * | 2017-10-17 | 2020-11-06 | 上海交通大学 | Device and method for promoting agglomeration of fine lead dust in flue gas and mercury oxidation |
| CN109499760A (en) * | 2018-11-05 | 2019-03-22 | 河南博联慧绿环保科技有限公司 | A kind of novel cooking fume exhauster gas and oil separating plant |
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Application publication date: 20140108 |