CN102600973B - Preposed flue for electrostatic precipitator - Google Patents
Preposed flue for electrostatic precipitator Download PDFInfo
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- CN102600973B CN102600973B CN201210070304.6A CN201210070304A CN102600973B CN 102600973 B CN102600973 B CN 102600973B CN 201210070304 A CN201210070304 A CN 201210070304A CN 102600973 B CN102600973 B CN 102600973B
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- electrostatic precipitator
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Abstract
The invention discloses a preposed flue for an electrostatic precipitator. The preposed flue comprises a smoke uniform distributing device, a slurry atomizing nozzle, a flue main body, a smoke outlet, an air compressor, a stirrer, a slurry pump, a slurry pipeline and a flue inlet, wherein a smoke inlet and the smoke outlet are respectively connected with two ends of the flue main body; the smoke uniform distributing device and the slurry atomizing nozzle are arranged in the flue main body close to the end at the smoke inlet in turn; the slurry atomizing nozzle is respectively connected with the slurry pump and the air compressor outside the flue main body; and the slurry pump is connected with the stirrer. The pelleting growth of superfine grains is realized by using the preposed flue provided by the invention; the capability of the electrostatic precipitator for capturing the superfine grains is obviously increased; the preposed flue has the advantages of small occupied area, less investment, low running cost, capability of being free from transforming the present precipitator, and the like; and the preposed flue has important significance for beneficiating and transforming the present electrostatic precipitator.
Description
Technical field
The invention belongs to environmental pollution prevention and control and clean coal technology field, particularly a kind ofly reduce discharging the preposition flue of the electrostatic precipitator of superfine particulate matter in ash-laden gas.
Background technology
In coal-fired flue-gas, contain a large amount of superfine particulate matters, research shows, what in urban air, in overall suspended pellet, generated by fire coal accounts for 33%, and wherein superfine particulate matter accounts for 35%.According to China Environmental Monitoring General Station, two-year superfine particulate matter monitoring is carried out in domestic four cities and shown, the superfine particulate matter discharge year of China, average daily all severe overweights of concentration.
Although the coal smoke control technology of various countries can reach very high level, for superfine particulate matter, removal efficiency is very low.At present, industrial application is electrostatic precipitator more widely.
Electrostatic precipitator is charged to dust in high voltage situation, then makes charged particle be hunted down under electric field force effect.Electrostatic precipitation effect is not only relevant with grain diameter, but also relevant with the ratio resistance of particle, than too high in resistance and the too low removing that is all unfavorable for particle.Although the efficiency of dust collection of electrostatic precipitation is higher, for micron-sized superfine particulate matter, owing to can not making it effectively charged, electrostatic precipitator can not be removed effectively to it.
Electrostatic precipitator is all higher to the efficiency of dust collection of dust granules more than 40 μ m, but they are very low to the superfine particulate matter elimination efficiency of 0.01～10 μ m.The particle diameter of these superfine particulate matters is very little, and mass concentration to account for overall share little, but quantity is very large.Therefore, the discharge of superfine particulate matter be fundamentally controlled, new control method must be found.
Summary of the invention
The deficiency that the present invention exists in order to overcome above-mentioned technology, provides a kind of preposition flue of electrostatic precipitator simple, easy and simple to handle of implementing.
To achieve these goals, the present invention adopts following technical scheme.
The preposition flue of electrostatic precipitator of the present invention, comprises flue-gas uniform distribution device, slurry spraying nozzle, flue main body, exhanst gas outlet, air compressor, agitator, slush pump, slurries pipeline and flue entrance.
Described flue main body two ends connect respectively smoke inlet and exhanst gas outlet, be provided with successively flue-gas uniform distribution device and slurry spraying nozzle near in the flue main body of smoke inlet end, slurry spraying nozzle is connected with air compressor with the slush pump outside flue main body respectively, and slush pump is connected with agitator.
Dust granules in flue gas bonds through slurries spray in flue main body, superfine particulate matter, is grown up thereby make dust granules realize fluidization granulation in the preposition flue of electrostatic precipitator by drop or particle capture by chain reunion, surface adhesion or dressing structure.
As a further improvement on the present invention, in flue main body, can also be provided with ash bucket.
The preposition flue of electrostatic precipitator of the present invention slurries used are the white lime slurries that water or concentration are less than 15%, and slurries straying quatity is so that flue gas relative humidity is no more than 80% is advisable.The present invention can, according to different dusts granularity and granulation situation, be 3～20m/s by the control of flow of flue gas velocity interval.
The invention has the beneficial effects as follows, utilize the preposition flue of electrostatic precipitator of the present invention, electrostatic precipitator need not be transformed its structure, just can reduce the superfine particulate matter concentration of emission of each pollution sources, implement simple simultaneously, easy and simple to handle, reunion slurries are water or the white lime slurries that are easy to get, the advantage such as small investment, operating cost are low.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the preposition flue of electrostatic precipitator.
In figure, 1 is flue-gas uniform distribution device, and 2 is slurry spraying nozzle, and 3 is flue main body, and 4 is exhanst gas outlet, and 5 is air compressor, and 6 is compressed air piping, and 7 is agitator, and 8 is slush pump, and 9 is slurries pipeline, and 10 is ash bucket, and 11 is flue entrance.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
The preposition flue of electrostatic precipitator of the present invention, comprises flue-gas uniform distribution device 1, slurry spraying nozzle 2, flue main body 3, exhanst gas outlet 4, air compressor 5, compressed air piping 6, agitator 7, slush pump 8, slurries pipeline 9, ash bucket 10 and flue entrance 11.
Described flue main body 3 two ends connect respectively smoke inlet 11 and exhanst gas outlet 4, be provided with successively flue-gas uniform distribution device 1 and slurry spraying nozzle 2 near in the flue main body 3 of smoke inlet 11 ends, slurry spraying nozzle 2 is connected with air compressor 5 with the slush pump 8 outside flue main body 3 respectively, and slush pump 8 is connected with agitator 7.
Before the preposition flue of electrostatic precipitator of the present invention is arranged on electrostatic precipitator, ash-laden gas enters flue main body 3 from flue entrance 11, flue-gas uniform distribution device 1 is uniformly distributed flue gas, slush pump 8 is extracted the slurries in agitator 7 out, and in slurry spraying nozzle 2 in slurries pipeline 9 is sent into flue main body 3, air compressor 5, by compressed air piping 6, is sent into compressed air in slurry spraying nozzle 2.Dust granules is interior through slurries sprays and bond in flue main body 3, superfine particulate matter by chain reunion, surface adhesion or dressing structure by drop or particle capture, thereby making dust granules realize fluidization granulation in the preposition flue of electrostatic precipitator grows up, larger particles falls into ash bucket 10, and the ash-laden gas after granulation enters dedusting in electrostatic precipitator through exhanst gas outlet 4.
In the present embodiment, the binding agent of employing is have cheap and easy to get and have a lime slurry of certain viscosity.After lime slurry atomization, be evenly injected in fluid bed, each lime white drop forms " seed grain ", first, " seed grain " make the particle of contact moistening and be gathered in own around, form cluster of grains aggressiveness; Meanwhile, then be dropped on " seed grain " surface and produce bridging action by the lime slurry that continues to spray into, make between " seed grain ", mutually combine between " seed grain " and fluid bed endoparticle, grow up into gradually larger particle.After dry, intergranular liquid rack bridging becomes solid to build bridge, formation porous, the particle that specific area is larger.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (1)
1. the preposition flue of electrostatic precipitator, is characterized in that, comprises flue-gas uniform distribution device, slurry spraying nozzle, flue main body, exhanst gas outlet, air compressor, agitator, slush pump, slurries pipeline and flue entrance; Described flue main body two ends connect respectively smoke inlet and exhanst gas outlet, be provided with successively flue-gas uniform distribution device and slurry spraying nozzle near in the flue main body of smoke inlet end, slurry spraying nozzle is connected with air compressor with the slush pump outside flue main body respectively, and slush pump is connected with agitator; Dust granules in flue gas bonds through slurries spray in flue main body, superfine particulate matter, is grown up thereby make dust granules realize fluidization granulation in the preposition flue of electrostatic precipitator by drop or particle capture by chain reunion, surface adhesion or dressing structure; In flue main body, be also provided with ash bucket; The slurries of described slurry spraying nozzle ejection are the white lime slurries that water or concentration are less than 15%; The slurries straying quatity of slurry spraying nozzle ejection makes flue gas relative humidity be no more than 80%; Flow of flue gas speed is controlled to 3～20m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210070304.6A CN102600973B (en) | 2012-03-16 | 2012-03-16 | Preposed flue for electrostatic precipitator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210070304.6A CN102600973B (en) | 2012-03-16 | 2012-03-16 | Preposed flue for electrostatic precipitator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102600973A CN102600973A (en) | 2012-07-25 |
| CN102600973B true CN102600973B (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210070304.6A Active CN102600973B (en) | 2012-03-16 | 2012-03-16 | Preposed flue for electrostatic precipitator |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567073A (en) * | 2012-08-07 | 2014-02-12 | 王长皓 | Polar plate of novel electrostatic dust-collection purifying equipment |
| CN105561706B (en) * | 2016-02-19 | 2018-07-13 | 中国海洋石油集团有限公司 | A kind of combined type gas-liquid flue gas ash removal pressure guiding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB699867A (en) * | 1951-03-05 | 1953-11-18 | Research Corp | Improvements in or relating to electrical precipitators |
| US2717051A (en) * | 1952-02-01 | 1955-09-06 | Research Corp | Apparatus for removing suspended materials from gas streams |
| CN2506349Y (en) * | 2001-08-27 | 2002-08-21 | 兰州电力修造厂 | Pre-flue humidifier for electric dust remover |
| KR100505125B1 (en) * | 2002-04-19 | 2005-07-29 | 서울샤프중공업 주식회사 | The de-sulfuration de-dioxins Equipment for Waste treatment system |
| CN202479041U (en) * | 2012-03-16 | 2012-10-10 | 山东大学 | Preposed smoke channel for electrostatic precipitator |
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| CN102600973A (en) | 2012-07-25 |
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| CB03 | Change of inventor or designer information |
Inventor after: Dong Yong Inventor after: Du Shiyong Inventor after: Han Daomen Inventor after: Ye Xinqiang Inventor after: Wang Peng Inventor after: Cui Lin Inventor after: Du Qian Inventor before: Dong Yong Inventor before: Wang Peng Inventor before: Du Qian |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: DONG YONG WANG PENG DU QIAN TO: DONG YONG DU SHIYONG HAN DAOWEN YE XINQIANG WANG PENG CUI LIN DU QIAN |
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