CN103008109B - The hollow polar plate electrostatic precipitation device and method that a kind of porous media material is formed - Google Patents
The hollow polar plate electrostatic precipitation device and method that a kind of porous media material is formed Download PDFInfo
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Abstract
The hollow polar plate electrostatic precipitation device and method that porous media material is formed, belongs to dedusting technology field.The present invention is characterised in that the hollow pole plate that have employed porous media material and form, after passing into water, water forms moisture film through porous media material at polar board surface, trapping is deposited on the particle of polar board surface by electrostatic field, when polar board surface has the more particle deposition being difficult to remove, pass into gas to pole plate inside, gas forms of short duration air film at polar board surface, eliminating particle thing through porous media material.Water inlet and air feed hocket.The present invention effectively can reduce the water consumption of wet dust removal, ensures that the moisture film of dust collecting pole plate covers complete with the object realizing efficient removal particle.Adopt the electrostatic precipitation system of this device to have compact conformation, lack the advantage that water is efficient, be easy to maximization application.
Description
Technical field
The present invention relates to the hollow polar plate electrostatic precipitation device and method that a kind of porous media material is formed, belong to dedusting technology field.
Background technology
A large amount of gaseous contaminant that mankind's activity produces and particle just threaten the mankind rely the base substance in existence---clean air.Pellet (PM
10) particularly fine particle (PM
2.5) pollute and become outstanding atmospheric environment problem, and day by day cause the great attention of countries in the world.It has been recognized that Atmospheric particulates (particularly fine particle) are wherein the main causes causing human death to lead rising.Meanwhile, Atmospheric particulates are also the main causes causing the great atmosphere polluting problems such as atmospheric visibility reduction, acid rain, Global climate change and depletion of the ozone layer.The pollution controlling fine particle is the great demand of global energy-saving and emission-reduction strategy.Within quite long period, fine particle can not change as the basal conditions of the primary pollutant of China's atmosphere pollution.At present, China's air PM
2.5concentration ratio developed country high several times, cause very large threat to health and socio-economic development, and the emission control of fine particle has been extremely urgent.
At present, although total particulate control technology can reach very high level in the world, very low for fine grain capture rate, cause in the fine particle entered environment air of enormous amount.For coal fired power plant, although the efficiency of dust collection of existing dust arrester can up to more than 99%, the capture rate of these dedusters to fine particle is lower.This part flying dust is less than 2.5 microns even fine grained of submicron order based on particle diameter, can reach more than 90% of particle sum in the quantity of particle.This Ye Shi China in an atmosphere overall suspended pellet (TSP) is downward trend year by year, when granular material discharged total amount also declines, and PM
2.5reason in rising trend, therefore, what particle controlled focuses on fine particle, must seek more effectively and technical development approach more targetedly.
Be devoted to improve and optimize the research that traditional pollutant catabolic gene equipment removes fine particle capturing ability both at home and abroad to increase gradually.On conventional bag cleaner basis, such as improve fibrous material and the structure of filter bag, by increasing the methods such as middle high energy electrode on conventional electrostatic cleaner basis.Under stricter fine particle discharge standard, adopt any single removing sulfuldioxide all cannot satisfy the demands, therefore develop different control modes cooperation-removal technology day by day urgent.
The electrostatic precipitator taking electrostatic field as removal mechanism, as fume dust remover conventional at present, obtains very general application at electric power enterprise and cement industry.Utilizing electrostatic field to remove particle application industrially is mainly applied directly on particle by electrostatic force, makes charging particle, and moves on opposite electrode, thus realizes removing.In practical operation, produce corona discharge mainly with high voltage direct current at two interpolars, when dust-contained airflow is by two electric field between electrodes, particle is forced charged, and charged particle moves to opposite polarity pole plate and trapped by pole plate under the effect of electrostatic force.
Electric cleaner has good removal effect for large-size particles thing, but not high for the removal efficiency of granule especially fine particle.In order to remove fine particle better, multistage electric field is often set in practical engineering application, to improve the removal efficiency to particle as much as possible.But profit in this way, not obvious to the raising of efficiency of dust collection.Cause this phenomenon major reason to be exactly that the fine particle of this particle size range is easy to follow flow of flue gas, horizontal proliferation is weak, and reentrainment of dust may occur.How to strengthen electrostatic field and laterally act on the important development direction remaining and improve fine particle arresting efficiency.Industrialized wet static dedusting device all adopts pole plate to apply moisture film technology, such as Chinese patent 02222513.7,00215471.4,200410058967.1 etc. at present.The method applying moisture film all adopts the mode to polar board surface water spray to carry out, for avoid polar board surface be partially formed dry district or moisture film imperfect caused dust collecting pole plate corrosion and efficiency of dust collection low, need to spray into the normal operation that a large amount of water maintains system, the increase of water consumption certainly will be caused like this.Chinese patent 20111048292.7 proposes a kind of testing arrangement of dust collector pole liquid film of wet cottrell, can monitor polar board surface and whether occur dry district problem.
In sum, how to provide a kind of effective guarantee pole plate liquid film to cover complete wet static dedusting device, reducing the consumption of water while realizing efficient removal particle, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
The object of this invention is to provide the hollow polar plate electrostatic precipitation device and method of a kind of low water consumption, high efficiency porous media material formation.
The object of the invention is to be achieved through the following technical solutions:
The hollow polar plate electrostatic precipitation device that a kind of porous media material is formed, this device comprises multiple unit and dust collection of gathering dust, each unit that gathers dust comprises dust collecting pole plate and polar curve, it is characterized in that: dust collecting pole plate is hollow pole plate, and its internal chamber is hexahedron structure; Hollow polar board surface is made up of porous media material; Hollow pole plate is connected with inlet valve and air-supplying valve respectively by pipeline.
The hollow polar plate electrostatic precipitation device that porous media material of the present invention is formed, is characterized in that: described porous media material adopts metal, metal alloy, pottery, macromolecular compound, carbon, glass, resin or linen-cotton.
The hollow polar plate electrostatic precipitation device that porous media material of the present invention is formed, is characterized in that: the porosity of described porous media material is 0.3 ~ 0.9, and average pore size is 0.1 ~ 100 μm.
The hollow polar plate electrostatic precipitation device that porous media material of the present invention is formed, is characterized in that: the interior surface spacing that hollow pole plate is relative with both sides polar curve is 10 ~ 50mm.
The hollow polar plate electrostatic precipitation method that a kind of porous media material provided by the invention is formed, is characterized in that the method comprises the steps:
1) when air-supplying valve is closed, inlet valve is opened, water enters hollow pole plate and is full of whole chamber, water flows out from porous media material hole and forms moisture film at hollow pole plate outer surface, trapping is deposited on the particle on dust collecting pole plate surface by electrostatic field, and flows into the dust collection of electrostatic precipitator;
2) when inlet valve is closed, after moisture in hollow pole plate chamber is discharged, air-supplying valve is opened, and the gas passed into passes from porous media material hole, and is removed by hollow pole plate outside deposition particle;
3) step 1) and 2 is repeated).
The hollow polar plate electrostatic precipitation method that a kind of porous media material of the present invention is formed, it is characterized in that: in system operation, the gas average discharge that during air feed, hollow polar board surface unit are passes into is 0.005 ~ 1m
3/ s, duration of ventilation is 1 ~ 10s.
The hollow polar plate electrostatic precipitation method that a kind of porous media material of the present invention is formed, it is characterized in that: when passing into gas, hollow pole plate chamber inner volume is less than 1/3 of chamber volume.
The present invention compared with prior art, have the following advantages and high-lighting effect: 1. under the prerequisite that larger change is not carried out to routine intravenous Design of Electrostatic Precipitator, can implement by changing existing dust collecting pole plate and connecting water inlet and the pipeline of air feed and valve, can conveniently for design upgrading and the plant modification of existing electrostatic dust collection equipment; 2. supply water to hollow pole plate owing to have employed water supply line, water flows out from porous media and forms moisture film at hollow pole plate outer surface, to remove particle, without the need to arranging external nozzles cleaning polar board surface particle specially, compared with existing conventional wet electrostatic precipitator, system cost can be reduced; 3., after adopting porous media material, dust collecting pole plate surface moisture film covers complete, can ensure higher dust-collecting efficiency; After gas feeds hollow pole plate, the air film formed on hollow pole plate porous media material surface effectively can remove the particle adhering to surface, ensures the effect of deashing, and can reduce the consumption of water.
Accompanying drawing explanation
Fig. 1 is the hollow pole plate of porous media material provided by the invention formation and the structural representation of air-supplying valve and inlet valve.
Hollow pole plate when Fig. 2 is hollow polar board surface applying moisture film and polar curve arrange sketch.
Hollow pole plate when Fig. 3 is hollow polar board surface applying air film and polar curve arrange sketch.
In figure: 1-hollow pole plate, 2-polar curve, 3-inlet valve, 4-air-supplying valve, 5-moisture film.
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present invention, structure and the course of work are described further.
The hollow polar plate electrostatic precipitation device that a kind of porous media material provided by the invention is formed, this device comprises multiple unit and dust collection of gathering dust, each unit that gathers dust comprises dust collecting pole plate and polar curve 2, and dust collecting pole plate adopts hollow pole plate 1, and its internal chamber is hexahedron structure; Hollow polar board surface is made up of porous media material; Hollow pole plate 1 is connected with inlet valve 3 and air-supplying valve 4 respectively by pipeline.The porous media material that hollow polar plate electrostatic precipitation device adopts adopts metal, metal alloy, pottery, macromolecular compound, carbon, glass, resin or linen-cotton.When adopting flexible material, as linen-cotton, carbon cloth or glass fabric, need to arrange metal framework structure, to maintain the shape of hollow pole plate 1.The porosity of porous media material is 0.3 ~ 0.9, and average pore size is 0.1 ~ 100 μm.The interior surface spacing that hollow pole plate is relative with both sides polar curve is 10 ~ 50mm.
The proposed by the invention unit that gathers dust is when assembling electrostatic precipitator total system, and the end unit that gathers dust only arranges water supply line, does not arrange steam line.The problem that the airborne dust later stage mainly avoiding air feed to cause can not be captured.
The course of work of the present invention is as follows:
1) when air-supplying valve 4 is closed, inlet valve 3 is opened, water enters hollow pole plate 1 and is full of whole chamber, water flows out from porous media material hole and forms moisture film 5 at hollow pole plate 1 outer surface, trapping is deposited on the particle on dust collecting pole plate surface by electrostatic field, and flows into the dust collection of electrostatic precipitator;
2), when inlet valve 3 is closed, after moisture in hollow pole plate 1 chamber is discharged, air-supplying valve 4 is opened, and the gas passed into passes from porous media material hole, and is removed by hollow pole plate 1 outside deposition particle;
3) step 1) and 2 is repeated).
In system operation, the gas average discharge that during air feed, hollow polar board surface unit are passes into is generally 0.005 ~ 1m
3/ s, duration of ventilation is 1 ~ 10s.
When passing into gas, hollow pole plate chamber inner volume is less than 1/3 of chamber volume.
When electrostatic precipitator Control System Design, except routine intravenous electric cleaner control strategy, also need to consider following strategy: the character of the open frequency setting needs foundation hollow polar board surface institute adhered particles thing of air-supplying valve determines.If there is pole plate corrosion, when polar board surface exists damaging problem, stop the unlatching of inlet valve, adopt interruption plenum system to carry out deashing.
Claims (7)
1. the hollow polar plate electrostatic precipitation device of a porous media material formation, this device comprises multiple unit and dust collection of gathering dust, each unit that gathers dust comprises dust collecting pole plate and polar curve (2), it is characterized in that: dust collecting pole plate adopts hollow pole plate (1), and its internal chamber is hexahedron structure; Hollow polar board surface is made up of porous media material; Hollow pole plate is connected with inlet valve (3) and air-supplying valve (4) respectively by pipeline.
2. according to the hollow polar plate electrostatic precipitation device that porous media material according to claim 1 is formed, it is characterized in that: described porous media material adopts metal, metal alloy, pottery, macromolecular compound, carbon or glass.
3. according to the hollow polar plate electrostatic precipitation device that porous media material according to claim 1 is formed, it is characterized in that: the porosity of described porous media material is 0.3 ~ 0.9, and average pore size is 0.1 ~ 100mm.
4. according to the hollow polar plate electrostatic precipitation device that porous media material according to claim 1 is formed, it is characterized in that: the interior surface spacing that hollow pole plate is relative with both sides polar curve is 10 ~ 50mm.
5. adopt a hollow polar plate electrostatic precipitation method for device as claimed in claim 1, it is characterized in that the method comprises the steps:
1) when air-supplying valve (4) is closed, inlet valve (3) is opened, water enters hollow pole plate (1) and is full of whole chamber, water flows out from porous media material hole and forms moisture film (5) at hollow pole plate (1) outer surface, trapping is deposited on the particle on dust collecting pole plate surface by electrostatic field, and flows into the dust collection of electrostatic precipitator;
2) when inlet valve (3) is closed, after moisture in hollow pole plate (1) chamber is discharged, air-supplying valve (4) is opened, and the gas passed into passes from porous media material hole, and is removed by hollow pole plate (1) outside deposition particle;
3) step 1 is repeated) and 2).
6. according to hollow polar plate electrostatic precipitation method according to claim 5, it is characterized in that: in system operation, the gas average discharge that during air feed, hollow polar board surface unit are passes into is 0.005 ~ 1m
3/ s, duration of ventilation is 1 ~ 10s.
7. according to hollow polar plate electrostatic precipitation method according to claim 5, it is characterized in that: when passing into gas, hollow pole plate chamber inner volume is less than 1/3 of chamber volume.
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| CN103008109B true CN103008109B (en) | 2016-02-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272697B (en) * | 2013-05-06 | 2016-01-13 | 清华大学 | A kind of wet static dedusting chamber structure dust collecting pole plate |
| CN103341409B (en) * | 2013-06-28 | 2016-08-10 | 中节环立为（武汉）能源技术有限公司 | The dust collecting pole plate of wet type moisture film electrostatic precipitator |
| CN108295588A (en) * | 2018-04-10 | 2018-07-20 | 北京英华高科技有限公司 | A kind of new gas dust separation device |
| CN111558270B (en) * | 2020-04-29 | 2022-12-13 | 刘根凡 | Porous medium liquid film dust remover |
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| JPS62136255A (en) * | 1985-12-11 | 1987-06-19 | Miyahara Isao | Dust collector |
| JP2001046907A (en) * | 1999-08-06 | 2001-02-20 | Mitsubishi Heavy Ind Ltd | Electric dust collector |
| CN201625582U (en) * | 2010-02-23 | 2010-11-10 | 曹婷婷 | Polar plate of electric dust collector |
| CN201644221U (en) * | 2010-05-17 | 2010-11-24 | 山东电力研究院 | Dry-wet mixed electrical dust remover |
| CN202590955U (en) * | 2011-12-28 | 2012-12-12 | 宝山钢铁股份有限公司 | Three-area electric coagulation dust catcher |
| CN203253532U (en) * | 2012-12-18 | 2013-10-30 | 清华大学 | Hollow pole plate electrostatic dust removing apparatus formed from porous dielectric material |
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2012
- 2012-12-18 CN CN201210553549.4A patent/CN103008109B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62136255A (en) * | 1985-12-11 | 1987-06-19 | Miyahara Isao | Dust collector |
| JP2001046907A (en) * | 1999-08-06 | 2001-02-20 | Mitsubishi Heavy Ind Ltd | Electric dust collector |
| CN201625582U (en) * | 2010-02-23 | 2010-11-10 | 曹婷婷 | Polar plate of electric dust collector |
| CN201644221U (en) * | 2010-05-17 | 2010-11-24 | 山东电力研究院 | Dry-wet mixed electrical dust remover |
| CN202590955U (en) * | 2011-12-28 | 2012-12-12 | 宝山钢铁股份有限公司 | Three-area electric coagulation dust catcher |
| CN203253532U (en) * | 2012-12-18 | 2013-10-30 | 清华大学 | Hollow pole plate electrostatic dust removing apparatus formed from porous dielectric material |
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