CN201644221U - Wet and dry hybrid electrostatic precipitator - Google Patents

Wet and dry hybrid electrostatic precipitator Download PDF

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Publication number
CN201644221U
CN201644221U CN2010201912558U CN201020191255U CN201644221U CN 201644221 U CN201644221 U CN 201644221U CN 2010201912558 U CN2010201912558 U CN 2010201912558U CN 201020191255 U CN201020191255 U CN 201020191255U CN 201644221 U CN201644221 U CN 201644221U
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wet
water
electric field
dust
dry
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姜雨泽
李乐丰
齐达立
林爱杰
张永
江红
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Electric Power Research Institute of State Grid Shandong Electric Power Co Ltd
State Grid Corp of China SGCC
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Electric Power Research Institute of State Grid Shandong Electric Power Co Ltd
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Abstract

本实用新型涉及一种干湿混合电除尘器。主要由进口烟箱、气流均布板、壳体、阴极线、阳极板、出口烟箱、出口槽型板、振打装置、灰斗、布水装置、集水箱组成，其特征在于，在烟气或废气流入方向上游设有采用机械振打、电磁振打或声波清灰的干式清灰电场，最后一个电场为采用水膜清灰的湿式清灰电场，干式清灰电场与湿式清灰电场布置在同一个壳体内，湿式清灰电场与清灰水处理循环利用系统连接。它综合了干式电除尘和湿式电除尘优点，既能高效除尘确保达标排放，又将湿式清灰引发的防腐投资、水处理设备投资及其运行费用降到最低。

Figure 201020191255

The utility model relates to a dry-wet hybrid electric precipitator. It is mainly composed of imported smoke box, air distribution plate, shell, cathode line, anode plate, outlet smoke box, outlet groove plate, rapping device, ash hopper, water distribution device, and water collection box. It is characterized in that, in the smoke The upstream of the gas or exhaust gas flow direction is equipped with a dry cleaning electric field that uses mechanical rapping, electromagnetic rapping or sonic cleaning, and the last electric field is a wet cleaning electric field that uses water film cleaning. The ash electric field is arranged in the same shell, and the wet ash removal electric field is connected with the ash removal water treatment and recycling system. It combines the advantages of dry electrostatic precipitator and wet electrostatic precipitator. It can not only remove dust efficiently to ensure up-to-standard discharge, but also minimize the investment in anti-corrosion, water treatment equipment and operating costs caused by wet dust cleaning.

Figure 201020191255

Description

Wet-dry mixing electric dust remover
Technical field
The utility model belongs to the environmental protection filed of flue gas purification, relates in particular to a kind of high-pressure electrostatic Wet-dry mixing electric dust remover that utilizes dry type deashing and wet type deashing to combine.
Background technology
The dry electric precipitation device is most widely used at present, topmost dedusting means, be widely used in industry flue gas ash removals such as electric power, metallurgy, building materials, have advantages such as the smoke treatment amount is big, efficiency of dust collection is high, resistance is little, technical process is simple, operation and maintenance cost is low.But anti-corona than resistance bad adaptability, takes place when collecting high specific resistance flue dust (dust) to flue dust (dust) in the dry electric precipitation existence, has a strong impact on the electric precipitation operation, reduces efficiency of dust collection.The flue dust (dust) that captured the phenomenon of back-mixing in the air-flow once more takes place when collecting low resistivity flue dust (dust), and efficiency of dust collection is extremely low.Dry electric precipitation also exists rapping to cause that reentrainment of dust, corona wind cause problems such as reentrainment of dust, thereby common dry electric precipitation is difficult to reach 50mg/Nm 3Thermal power plant's dust emission standard, for the 30mg/Nm that be about to implement 3Discharge standard be difficult to especially realize.
The wet electrical dust precipitator utilization is cleaned the dust that is trapped on the pole plate in formation water membrane on the pole plate, thereby overcome the above-mentioned shortcoming of dry electric precipitation, make it have high dust removal performance, the common electrical dedusting is difficult to capture micron, sub-micron grade particle can both efficiently capture, and the coal-burning boiler smoke dust discharge concentration can be controlled at 10mg/Nm 3Below, for gas purification, dust content can be controlled at 1mg/Nm 3Below.But wet-esp also has its limitation: have corrosivity, need carry out preservative treatment; When the inlet dust concentration was too high, washing time prolonged, and water consumption also increases, and is not suitable for high dust concentration flue gas; Need carry out water treatment, increase water treatment facilities.These shortcomings of wet-esp increase its cost, and application is restricted, and are mainly used in the occasion that common dry electric precipitation and other dedusting means can't satisfy the smoke and dust treatment needs.In addition, existing wet electrical dust precipitator is not suitable for high temperature flue gases (waste gas) such as fire coal boiler fume.
The utility model content
The purpose of this utility model is exactly the shortcoming that overcomes single dry electric precipitation, wet-esp, and comprehensive utilization dry electric precipitation and electric precipitation advantage realize the effect of high efficiency electrostatic dedusting, and reduce investment and operating cost.
For achieving the above object, the utility model adopts following technical scheme:
A kind of Wet-dry mixing electric dust remover, mainly by the import smoke box, the airflow uniform distribution plate, housing, cathode line, positive plate, the outlet smoke box, the outlet slot template, rapping apparatus, ash bucket, water-distributing device, header tank is formed, it is characterized in that, be provided with several employing mechanical vibrators at flue gas or waste gas inflow direction upstream, the dry type deashing electric field of electromagnetic rapping or sound wave ashing, last electric field is for adopting the wet type deashing electric field of moisture film deashing, dry type deashing electric field and wet type deashing electric field are arranged in the same housing, and wet type deashing electric field is connected with the deashing water treatment cycle utilization system.
Described wet type deashing electric field water-distributing device can be and is arranged on wet type deashing electric field the gather dust atomizer of positive plate top or water distributor, cloth tank, cloth water tank, directly supply water, form moisture film at the wet type deashing electric field positive plate that gathers dust to the wet type deashing electric field positive plate that gathers dust.
Described wet type deashing electric field water-distributing device can be atomizer, be arranged in the gather dust top in space of wet type deashing electric field, to whole wet type deashing electric field atomization water droplet, water droplets is trapped in wet type deashing electric field and gathers dust and form ash removing water film on the positive plate after charged in the decline process.
Described wet type deashing electric field can be provided with cathode rapping device or sound wave ash cleaner, and target corona wire and framework thereof adopt mechanical vibrator, electromagnetic rapping or send sound wave and remove the flue dust that adheres on the negative electrode.
Described water distributor is installed in gather dust positive plate top of wet type deashing electric field, and perforate is sprayed water to pole plate on water distributor, pitch of holes 10～30mm, and aperture 1.0～3.0mm, hole for water spraying and water outlet median plane thereof and pole plate are 5～30 and spend angles.
In outlet slot template back outlet smoke box, demister can be set.
Header tank is established in described wet type deashing electric field below, is connected with the Ph value adjusting device with the purifying processing device of deashing water treatment cycle utilization system by pipeline, purifies adjusted water and turns back to water-distributing device by pipeline, once more deashing.
The utility model proposes a kind of Wet-dry mixing electric dust remover, form by import smoke box, airflow uniform distribution plate, housing, negative electrode, positive plate, outlet smoke box, outlet slot template, rapping apparatus, ash bucket, water-distributing device, header tank etc., dry type deashing electric field and wet type deashing electric field are arranged in the same electric cleaner housing, several electric fields of flue gas (waste gas) flow direction upstream adopt the dry type deashing, general dry type deashing electric field is 1～4, common 2～3, determine that according to actual conditions last electric field adopts the wet type deashing.
The dry type deashing electric field of Wet-dry mixing electric dust remover adopts mechanical vibrator, electromagnetic rapping or sound wave ashing, and last wet type deashing electric field adopts the moisture film deashing, forms the moisture film that one deck flows downward on pole plate, takes away the dust that is captured on the pole plate.
Wet type ash removing water film formation method, purifying flue gas condition according to deduster determines, when high temperature flue gases such as processing fire coal boiler fume, be advisable directly to form moisture film to pole plate water supply, as: overflow, the inner water storage of pole plate perforate water distribution, water distributor perforate are above it directly sprayed water or are sprayed or the like to pole plate to pole plate water spray, shower nozzle, wherein forming the moisture film mode with the water distributor perforate to the pole plate water spray optimizes the most, simple and practical, economy, film-formation result are good, can prevent the evaporation of deashing water, reduce water consumption.Adopt this kind moisture film formation method, cathodic electricity hachure and framework thereof still are in the high-temperature flue gas, still adopt the dry type deashing, do not have etching problem, need not anticorrosion; When handling low temperature or saturated flue gas (waste gas), form on the pole plate moisture film except that above-mentioned directly on pole plate the formation method, can adopt above the electric precipitation pole plate atomizer is installed, to the space jet atomization water droplet that gathers dust, water droplet is trapped in and forms moisture film on the pole plate.To low-temperature flue gas, this moisture film generation type is optimized the most, and water saving, film-formation result is good, and water droplets can capture fine solid particle, helps improving efficiency of dust collection.
Wet-dry mixing electric dust remover, wet type deashing electric field adopt water droplets to be captured in when forming moisture film on the pole plate by static, in the electric cleaner outlet dewater unit are set.
The water distributor perforate forms moisture film to the pole plate water spray, hole for water spraying spacing 10～30mm on the water distributor, and aperture 1.0～3.0mm, hole for water spraying and water outlet median plane thereof are 5～30 degree angles with the positive plate that gathers dust.
Wet type deashing water circulation use, water system is got to satisfactory water with water pump the top of wet type deashing electric field, supply water to water-distributing device, water-distributing device washes the dust that is captured on the pole plate at formation ash removing water film on the pole plate, flow into the header tank of wet type deashing electric field below, the deashing water that carries dust then enters the water treatment purifier, remove the suspension (dust) that carries in the deashing water through technical process such as precipitation, flocculation sediment, filtrations, and carry out the water quality adjustment, and then reach the deduster top, be used for deashing.
When the smoke treatment amount big, required pole plate height adopts patent applied for " a kind of ash removing water film for wet electric dust remover formation method and dust collecting pole plate used by same ", " a kind of wet-esp ash removing water film formation method dust collecting pole plate " described constraint formula pole plate and moisture film formation method when 6m is above.
The beneficial effects of the utility model are:
(1) can high-effective dust-removing, utilize wet electrical dust precipitator as last utmost point dedusting means with high efficiency of dust collection, improve efficiency of dust collection, guarantee to realize qualified discharge;
(2) performance dry electric precipitation device technical process is simple, operation and maintenance cost is low, resistance is little, advantage of low energy consumption, preceding two (three) electric fields adopt dry electric precipitation, adopt wet-esp to compare with whole electric fields, antiseptic project amount 2/3～3/4 be can reduce, investment and operating cost reduced significantly;
(3) Wet-dry mixing electric dust remover reduces by 2～3 wet type deashing electric fields, reduces towards the grey water yield 2/3～3/4, and deashing water circulation use system water treating capacity reduces 2/3～3/4, and water treatment facilities investment and operating cost significantly reduce.Thereby, adopt dried wet mixing to close, can save the deashing water, significantly reduce investment, reduce operating cost;
(4) keep most flying dusts to be still dry type flyash, can utilize original ash transfer is memory device, can utilize the low-cost comprehensive utilization of original approach flyash.The trouble of avoiding the flyash wet processed to bring.To coal-burning power plant's electric cleaner, through preceding 2～3 dry type deashing electric fields, 95.3～99.0% flying dust is removed.Thereby most flying dusts are still the dry type flying dust, can adopt former approach to fully utilize.
(5) Wet-dry mixing electric dust remover that proposes of this patent can be handled the big flow flue gases of high temperature such as fire coal boiler fume, has solved the difficult problem that coal-fired plant flue gas can't adopt wet-esp.
In sum, adopt dried wet mixing to close electric precipitation, utilize dry electric precipitation to remove most flue dust, utilize wet-esp to guarantee qualified discharge, make full use of advantage separately, again the shortcoming of wet electrical dust precipitator has been dropped to minimum, significantly reduced investment and operating cost.
Description of drawings
Fig. 1 Wet-dry mixing electric dust remover schematic diagram;
Fig. 2 is the wet type deashing electric field positive plate sectional drawing that gathers dust.
Wherein, 1 import smoke box, 2 airflow uniform distribution plates, 3 cathodic electricity hachures, the 4 dry type deashing electric fields positive plate that gathers dust, 5 housings, the 6 wet type deashing electric fields positive plate that gathers dust, 7 water distributors, 8 water supply lines, 9 outlet smoke boxes, 10 outlet slot templates, 11 ash buckets, 12 rapping apparatus, 13 purifying processing devices, 14 header tanks, 15 pH adjusting devices.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Embodiment 1:
Among Fig. 1, Wet-dry mixing electric dust remover is mainly by import smoke box 1, airflow uniform distribution plate 2, housing 5, outlet smoke box 9, outlet slot template 10, rapping apparatus 12, ash bucket 11, water-distributing device, header tank 14 is formed, it is characterized in that, be provided with several electric fields at flue gas or waste gas inflow direction upstream, except that the wet type deashing electric field of last electric field for employing wet type moisture film deashing, all the other electric fields all adopt mechanical vibrator, the dry type deashing electric field of electromagnetic rapping or sound wave ashing, dry type deashing electric field and wet type deashing electric field are arranged in the same housing 5, and wet type deashing electric field is connected with the deashing water treatment cycle utilization system.
Wet type deashing electric field water-distributing device is to be arranged on wet type deashing electric field the gather dust atomizer of positive plate 6 tops or water distributor 7, cloth tank, cloth water tank, directly supply water, form moisture films at the wet type deashing electric field positive plate 7 that gathers dust to gather dust positive plate 7 of wet type deashing electric field.Wet type deashing electric field also is provided with cathode rapping device or sound wave ash cleaner, and target corona wire and framework thereof adopt mechanical vibrator, electromagnetic rapping or send sound wave and remove the flue dust that adheres on the negative electrode.
Header tank 14 is established in wet type deashing electric field below, is connected with pH value adjusting device 15 with the purifying processing device 13 of deashing water treatment cycle utilization system by pipeline, purifies adjusted water and turns back to water-distributing device by pipeline, once more deashing.
Water distributor 7 is installed in wet type deashing electric field positive plate 6 tops of gathering dust, and perforate is sprayed water to pole plate on water distributor 7, pitch of holes 10mm, and aperture 1.0mm, hole for water spraying and water outlet median plane thereof and pole plate are 5 degree angles.
Embodiment 2:
In the present embodiment, hole for water spraying spacing 15mm, hole for water spraying aperture 1.8mm, hole for water spraying and water outlet median plane thereof and pole plate are 5 degree angles, and all the other structures are identical with embodiment 1, repeat no more.
Embodiment 3:
In the present embodiment, hole for water spraying spacing 25mm, hole for water spraying aperture 1.5mm, hole for water spraying and water outlet median plane thereof and pole plate are 30 degree angles, and all the other structures are identical with embodiment 1, repeat no more.
Embodiment 4:
In the present embodiment, wet type deashing electric field water-distributing device is an atomizer, be arranged in the gather dust top in space of wet type deashing electric field, to whole wet type deashing electric field atomization water droplet, water droplets is trapped in wet type deashing electric field and gathers dust and form ash removing water film on the positive plate 6 after charged in the decline process.In outlet slot template 10 back outlet smoke box 9, demister is set.

Claims (7)

1.一种干湿混合电除尘器，主要由进口烟箱、气流均布板、壳体、阴极线、阳极板、出口烟箱、出口槽型板、振打装置、灰斗、布水装置、集水箱组成，其特征在于，在烟气或废气流入方向上游设有若干个采用机械振打、电磁振打或声波清灰的干式清灰电场，最后一个电场为采用水膜清灰的湿式清灰电场，干式清灰电场与湿式清灰电场布置在同一个壳体内，湿式清灰电场与清灰水处理循环利用系统连接。1. A dry-wet hybrid electrostatic precipitator, mainly composed of an inlet smoke box, an air distribution plate, a shell, a cathode line, an anode plate, an outlet smoke box, an outlet groove plate, a rapping device, an ash hopper, and a water distribution device , water collection tank, characterized in that several dry dust removal electric fields using mechanical vibration, electromagnetic vibration or sonic cleaning are arranged upstream of the flue gas or exhaust gas inflow direction, and the last electric field is a water film dust removal field. The wet ash removal electric field, the dry ash removal electric field and the wet ash removal electric field are arranged in the same shell, and the wet ash removal electric field is connected with the ash removal water treatment and recycling system. 2.如权利要求1所述的干湿混合电除尘器，其特征是，所述湿式清灰电场布水装置为设置在湿式清灰电场收尘阳极板上方的雾化喷头或布水管、布水槽、布水箱，直接向湿式清灰电场收尘阳极板供水，在湿式清灰电场收尘阳极板上形成水膜。2. The dry-wet hybrid electrostatic precipitator as claimed in claim 1, characterized in that, said wet-type dust-cleaning electric field water distribution device is an atomizing nozzle or a water distribution pipe or a cloth cloth arranged above the wet-type dust-cleaning electric field dust collection anode plate. The water tank and cloth water tank directly supply water to the anode plate of the wet ash cleaning electric field dust collection, and form a water film on the anode plate of the wet ash cleaning electric field dust collection. 3.如权利要求1所述的干湿混合电除尘器，其特征是，所述湿式清灰电场布水装置为雾化喷头，布置在湿式清灰电场收尘空间的上方，向整个湿式清灰电场喷雾化水滴，雾化水滴在下降过程中荷电后被捕集在湿式清灰电场收尘阳极板上，形成清灰水膜。3. The wet-dry hybrid electrostatic precipitator according to claim 1, wherein the wet-type dust-cleaning electric field water distribution device is an atomizing nozzle, which is arranged above the wet-type dust-cleaning electric field dust collection space and spreads to the entire wet-type dust-clearing electric field. The ash electric field sprays water droplets, and the atomized water droplets are charged and trapped on the anode plate of the wet ash cleaning electric field dust collection during the falling process, forming a dust cleaning water film. 4.如权利要求2所述的干湿混合电除尘器，其特征是，所述湿式清灰电场也设置阴极振打装置或声波清灰装置，对阴极电晕线及其框架采用机械振打、电磁振打或发出声波清除阴极上粘附的烟尘。4. The dry-wet hybrid electrostatic precipitator as claimed in claim 2, characterized in that, the wet-type ash removal electric field is also provided with a cathode rapping device or an acoustic wave ash removal device, and the cathode corona wire and its frame are mechanically rapped , Electromagnetic rapping or sound waves to remove the smoke and dust adhering to the cathode. 5.如权利要求2所述的干湿混合电除尘器，其特征是，所述布水管安装在湿式清灰电场收尘阳极板上方，在布水管上开孔向极板喷水，孔间距10～30mm，孔径1.0～3.0mm，喷水孔及其出水中心面与极板呈5～30度角。5. The dry-wet hybrid electrostatic precipitator according to claim 2, wherein the water distribution pipe is installed above the anode plate for wet dust cleaning electric field dust collection, holes are opened on the water distribution pipe to spray water to the pole plate, and the distance between the holes is 10 ~ 30mm, hole diameter 1.0 ~ 3.0mm, the water spray hole and its water outlet center surface and the pole plate are at an angle of 5 ~ 30 degrees. 6.如权利要求3所述的干湿混合电除尘器，其特征是，在出口槽型板后面出口烟箱内设置除雾器。6. The dry-wet hybrid electrostatic precipitator according to claim 3, characterized in that, a mist eliminator is arranged in the outlet smoke box behind the outlet slot plate. 7.如权利要求1、2或3所述的干湿混合电除尘器，其特征是，所述湿式清灰电场下方设集水箱，通过管道与清灰水处理循环利用系统的净化处理装置和Ph值调节装置连接，净化调整后的水通过管道返回到布水装置，再次清灰。7. The wet-dry hybrid electrostatic precipitator as claimed in claim 1, 2 or 3, characterized in that, a water collection tank is set below the wet-type ash-cleaning electric field, and the purification treatment device and The Ph value adjustment device is connected, and the purified and adjusted water is returned to the water distribution device through the pipeline, and the dust is cleaned again.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101816975A (en) * 2010-05-17 2010-09-01 山东电力研究院 Wet-dry mixing electric dust remover
CN102941158A (en) * 2012-12-05 2013-02-27 山东大学 Rigid anode plate surface water film arrangement technology and device
CN103008109A (en) * 2012-12-18 2013-04-03 清华大学 Hollow polar plate electrostatic dust removing device made of porous medium material and method
CN103878066A (en) * 2014-04-17 2014-06-25 中钢集团天澄环保科技股份有限公司 Dust collection polar plate of wet-type electric dust collector
CN105583076A (en) * 2015-12-29 2016-05-18 山东神华山大能源环境有限公司 Dry and wet coupling electrostatic dust collection system and dust collection technology
CN108722668A (en) * 2017-04-14 2018-11-02 浙江菲达环保科技股份有限公司 A kind of regulating temperature and humidity screening electric precipitator
WO2020083207A1 (en) * 2018-10-22 2020-04-30 上海必修福企业管理有限公司 Exhaust gas processing system and method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101816975A (en) * 2010-05-17 2010-09-01 山东电力研究院 Wet-dry mixing electric dust remover
CN102941158A (en) * 2012-12-05 2013-02-27 山东大学 Rigid anode plate surface water film arrangement technology and device
CN102941158B (en) * 2012-12-05 2014-02-26 山东大学 A water film layout process and device on the surface of a rigid anode plate
WO2014085949A1 (en) * 2012-12-05 2014-06-12 山东大学 Process and apparatus for arranging water film on surface of rigid anode plate
CN103008109A (en) * 2012-12-18 2013-04-03 清华大学 Hollow polar plate electrostatic dust removing device made of porous medium material and method
CN103008109B (en) * 2012-12-18 2016-02-24 清华大学 The hollow polar plate electrostatic precipitation device and method that a kind of porous media material is formed
CN103878066A (en) * 2014-04-17 2014-06-25 中钢集团天澄环保科技股份有限公司 Dust collection polar plate of wet-type electric dust collector
CN105583076A (en) * 2015-12-29 2016-05-18 山东神华山大能源环境有限公司 Dry and wet coupling electrostatic dust collection system and dust collection technology
CN108722668A (en) * 2017-04-14 2018-11-02 浙江菲达环保科技股份有限公司 A kind of regulating temperature and humidity screening electric precipitator
WO2020083207A1 (en) * 2018-10-22 2020-04-30 上海必修福企业管理有限公司 Exhaust gas processing system and method

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