CN1415421A - Electrostatic dust collection method in high speed internal circulation and relevant equipment - Google Patents
Electrostatic dust collection method in high speed internal circulation and relevant equipment Download PDFInfo
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- CN1415421A CN1415421A CN 01129840 CN01129840A CN1415421A CN 1415421 A CN1415421 A CN 1415421A CN 01129840 CN01129840 CN 01129840 CN 01129840 A CN01129840 A CN 01129840A CN 1415421 A CN1415421 A CN 1415421A
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Abstract
A high-speed electrostatic duster with internal circulation features that the dust contained airflow passes a corona discharge channel composed of plate electrodes and corona coil at 3-8 m/s speed, the clean airflow and the dust-contained airflow are separated from each other at the exit of said channel, the dust-contained airflow is introduced to air-solid separator and then returned back to the entrance of said channel for further circulation, and the clean airflow is discharged.
Description
The present invention relates to a kind of electrostatic dust removing method and device thereof.
Electrostatic precipitator is widely used in the flue gas ash removal of boiler and Industrial Stoves with its efficiency of dust collection that is much higher than other dedusting method.The present various electrostatic precipitator of using, its efficiency of dust collection is subjected to the influence of air velocity very big.If the air velocity by electric field is too high, the secondary fly-up that will cause the dust that gathers on the pole plate, thereby efficiency of dust collection is reduced, therefore have to adopt lower dust-contained airflow speed, common scope at 1.0～1.3m/s, this just makes that existing electrostatic precipitator is bulky, thereby brings shortcomings such as steel quantity consumption is big, floor space is big, initial cost height, limits being extensive use of of it greatly.In addition, existing electrostatic precipitator is only suitable captures than resistance value dust within the specific limits.Cross when low when the dust low resistivity, the dust that is adsorbed on the dust suction polar board surface can very fast fax with its lotus be given pole plate and lose electric charge, thereby is easy to Returning flow again, causes reentrainment of dust.High specific resistance is then opposite, after it is charged and be attracted on the dust collecting pole plate, be difficult for emitting electric charge owing to resistance is high, behind the certain thickness dust layer of accumulation, corona blocking and back corona phenomenon take place easily, have a strong impact on electric cleaner operate as normal and efficiency of dust collection.Conventional electrostatic precipitator also need be provided with rapping apparatus on pole plate and corona discharge electrode, too much to prevent laying dust, influences efficiency of dust collection.Because rapping apparatus itself is to constitute a key factor that influences the electrostatic precipitator operational reliability, the operation troubles of existing electrostatic precipitator often just goes out on rapping apparatus.
The objective of the invention is to propose a kind of can the raising greatly through circulation electrostatic dust removing method in the high speed of the dust-contained airflow speed of highfield, and according to the electrostatic precipitator that circulates in a kind of high speed that can when handling identical air quantity, significantly reduce equipment volume of this method design.This dust collection method and device thereof can overcome the existing existing above-mentioned shortcoming of electrostatic precipitator, and keep the efficiency of dust collection of existing deduster.
Circulation electrostatic dust removing method in the high speed proposed by the invention, be that the dust-contained airflow speed through highfield is brought up to 3～8m/s, and form new flow process and method with this, be characterized in making dust-contained airflow to pass through a corona discharge electric field passage of forming by battery lead plate and corona wire with the speed of 3～8m/s, air-flow is isolated at formed cleaning gas tream band of electric field channel outlet and high dust-contained airflow band, after then the high dust-contained airflow introducing gas-solid separator that isolates being carried out gas solid separation, its exhaust is drawn a feeder connection of wiring back again and continue the circulation dedusting, cleaning gas tream then directly discharges.
The basic principle of this method is: under effect of electric field, dust is enriched near flowing in the narrow and small zone of pole plate, and a part of dust wherein falls within ash bucket under the effect of gravity.Because the speed of air-flow is higher, the notion that conventional electrostatic precipitator is adsorbed on dust on the control of dust pole plate will be no longer suitable, and dust can't stop on pole plate for a long time.Electric field only is divided into cleaning gas tream band and high dust-contained airflow band to dust-contained airflow, in the gas channel exit that electrode is arranged, the clean gas flow that is rich in the air-flow of dust and contains dust is hardly isolated, clean gas flow is directly discharged, this part clean gas will account for about 80% of total exhaust gas volumn.The remaining high dust content air-flow that only accounts for total amount about 20% is introduced gas-solid separator, carry out the separation and the collection of dust, through the exhaust after this separator, if its dustiness is still too high, the electric field feeder connection that then again it is sent back to main deduster continues the circulation dedusting.After carrying out circular treatment like this, can make the efficiency of dust collection of whole system be not less than the level that existing electrostatic precipitator reaches.
The inventive method is owing to improved air velocity greatly, the raising of speed means can dwindle the cross section of electrostatic precipitator greatly, the inventive method is brought up to 3～8m/s to air velocity, the sectional area of then handling the electrostatic precipitator of same exhaust gas volumn only needs about 30% of routine, thereby its weight and cost are descended exponentially.
The structure of the interior circulation electrostatic precipitator of high speed that the method according to this invention is designed, comprise a deduster, in the flue gas flow channel of this deduster, has the corona discharge electric field passage of forming by battery lead plate and corona wire, the rear end of this electric field passage is an airflow outlet end, be that this airflow outlet end is separated into middle clean gas flow runner and both sides dust-contained airflow runner by dividing plate, the outlet of said dust-contained airflow runner is received gas-solid separator by pipeline, and the exhaust outlet of gas-solid separator is received the air flow inlet end of deduster through blower fan.
Width between the said dividing plate (4) can be made into adjustable.So that can the clean gas flow band be separated rightly with high dust-contained airflow band by the dedusting requirement.
Said gas-solid separator can adopt cyclone separator or cloth bag separator or other forms of separator, and optimal selection is to adopt cyclone separator.
When the circulation electrostatic precipitator moved in this high speed, air-flow should be crossed the electric field passage of deduster with the velocity flow of 3～8m/s.
Characteristics of the present invention are to have broken through routine from basic principle, improve the dust-contained airflow speed through highfield greatly.The raising of speed means the dwindling of sectional area of electrostatic precipitator.Air velocity is brought up to 3～8m/s, and the sectional area of then handling the electrostatic precipitator of same exhaust gas volumn has only about 30% of conventional electrostatic precipitator, and its weight and cost will descend exponentially.
Conventional electrostatic precipitator need be provided with rapping apparatus on pole plate and corona discharge electrode, too much to prevent laying dust, influences efficiency of dust collection.But rapping apparatus itself has just constituted a key factor that influences the deduster operational reliability.The operation troubles of existing deduster often just goes out on rapping apparatus.In the device of the present invention, because electric field only is divided into cleaning gas tream band and high dust-contained airflow band to dust-contained airflow, can laying dust on corona plate, so do not need to install rapping apparatus, simplify the structure of cleaner greatly, and improved the security of system reliability.
Comprehensive, the present invention has following complex art advantage:
1, the dust secondary fly-up can adopt higher air velocity to the influence of efficiency of dust collection on the pole plate owing to having eliminated.So just can make the volume-diminished of the electric field channel part of whole deduster arrive 1/3～1/4 of existing electrostatic precipitator, thereby reduce the cost and the floor space of deduster greatly;
2, do not need to be provided with rapping apparatus on the pole plate and on the corona plate, the structure of electric precipitation part obtains simplifying, and has improved the security reliability of system's operation;
3, because circular treatment has been carried out in the outlet of gas-solid separator (cyclone separator), the efficiency of dust collection of whole system is identical with existing electrostatic precipitator, and can not influence the efficiency of dust collection of whole system owing to the raising of air velocity.
Fig. 1 is the structural representation of experimental provision of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is apparatus of the present invention commercial Application example structure schematic diagram;
Fig. 4 is the B-B cutaway view of Fig. 3.
Be described in further detail below in conjunction with the CONSTRUCTED SPECIFICATION of accompanying drawing embodiment of the present invention:
Embodiment one
Present embodiment is an experimental provision of the present invention, and Fig. 1 is its structural representation.The deduster 1 of this device has a rectangular exhaust gases passes 11, its length is 5 meters, wide is 0.4 meter, height is 0.3 meter, the battery lead plate 2 that connects high voltage source is housed on the both sides of exhaust gases passes, the corona wire 3 that connects power cathode is equipped with in the centre, form corona discharge electric field passage 12, airflow outlet end at the electric field passage is equipped with two split-flow baffles 4, go to the bottom on this dividing plate 4 and the passage and contact, the closed flow (as shown in Figure 2) that in the middle of forming and both sides isolate mutually, intermediate flow channel is a clean gas flow runner 13, the both sides runner is a dust-contained airflow runner 14, shunt by dividing plate, clean gas flow is by directly outwards discharging of the middle clean gas flow runner between two dividing plates, and the dust-contained airflow runner 14 between dividing plate and the deduster limit wall is introduced cyclone separator 5 by pipeline, and the exhaust of cyclone separator is drawn the airflow reflux arrival end 15 of getting back to deduster by blower fan 6 again.The entrance velocity of air-flow adopts 4 meter per seconds in the present embodiment, air circulation be in the electric field passage air current flow 20%, the stand out among one's fellows processing air quantity of dirt device of high speed static is:
Q＝0.3×0.4×4×3600×(1-20％)＝1382.4m
3/h
And the conventional electrostatic precipitator of the identical size of employing equipment, its processing air quantity is:
Q＝0.3×0.4×1×3600＝432m
3/h
Approximately be the high speed electrostatic precipitator handle air quantity 1/3, when promptly handling identical air quantity, the equipment volume of this device is littler by 1/3 than routine, and their efficiency of dust collection is suitable.
Embodiment two
Present embodiment is the device for carrying out said of a commercial Application, and its structure as shown in Figure 3, Figure 4.Among the figure, 1 is deduster, 16 is the ash bucket of deduster bottom, in the exhaust gases passes 11 of deduster (as shown in Figure 4), constitute corona discharge electric field passage 12 by battery lead plate 2 and corona wire 3, airflow outlet end at the electric field passage is equipped with the split-flow baffles 4 that separates dust-contained airflow and clean gas flow, clean gas flow is by directly outwards discharging of clean gas flow passage 13, dust-contained airflow is introduced into cyclone separator 5 from dust-contained airflow passage 14 and carries out gas solid separation, and the low dust-laden exhaust after the separation is drawn the exhaust gases passes inlet of getting back to deduster by blower fan 6 and circulated.
Claims (4)
1. circulation electrostatic dust removing method in the high speed, it is characterized in that making dust-contained airflow to pass through a corona discharge electric field passage of forming by battery lead plate and corona wire with the speed of 3～8m/s, air-flow is isolated at formed cleaning gas tream band of electric field channel outlet and high dust-contained airflow band, after then the high dust-contained airflow introducing gas-solid separator that isolates being carried out gas solid separation, its exhaust is drawn a feeder connection of wiring back again and continue the circulation dedusting, cleaning gas tream then directly discharges.
2. circulation electrostatic precipitator in the high speed, comprise a deduster (1), in the flue gas flow channel (11) of this deduster, has the corona discharge electric field passage of being formed by battery lead plate (2) and corona wire (3) (12), the rear end of this electric field passage is an airflow outlet end, it is characterized in that this airflow outlet end is separated into middle clean gas flow runner (13) and both sides dust-contained airflow runners (14) by dividing plate (4), the outlet of said dust-contained airflow runner (14) is received gas-solid separator (5) by pipeline, and the exhaust outlet of gas-solid separator (5) is received the air flow inlet end of deduster (1) through blower fan (6).
3. circulation electrostatic precipitator in the high speed according to claim 2 is characterized in that the width-adjustable joint between the said dividing plate (4).
4. circulation electrostatic precipitator in the high speed according to claim 2 is characterized in that said gas-solid separator (5) is a cyclone separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129840 CN1415421A (en) | 2001-10-31 | 2001-10-31 | Electrostatic dust collection method in high speed internal circulation and relevant equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129840 CN1415421A (en) | 2001-10-31 | 2001-10-31 | Electrostatic dust collection method in high speed internal circulation and relevant equipment |
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| CN1415421A true CN1415421A (en) | 2003-05-07 |
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| CN 01129840 Pending CN1415421A (en) | 2001-10-31 | 2001-10-31 | Electrostatic dust collection method in high speed internal circulation and relevant equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435968C (en) * | 2004-09-24 | 2008-11-26 | 东北大学 | Electric dust remover with external circulation system and its using method |
| CN101272863B (en) * | 2005-06-14 | 2011-04-20 | 法雷奥热系统公司 | Static deposition device of charged particle in air flow |
| WO2014161122A1 (en) * | 2013-03-31 | 2014-10-09 | Zhao Bing | Side-wrap type air filter apparatus |
| CN104801421A (en) * | 2015-04-29 | 2015-07-29 | 福建卫东实业股份有限公司 | Efficient and environment-friendly fine dust electric dedusting method and equipment used in same |
| CN105709928A (en) * | 2016-04-14 | 2016-06-29 | 南京佳旺安环境科技有限公司 | High-voltage pulse electrostatic dust collector |
| CN107537840A (en) * | 2017-09-18 | 2018-01-05 | 安徽省嘉丰肥业有限公司 | A kind of fertilizer stirring dust exhaust apparatus |
| CN113145313A (en) * | 2021-03-30 | 2021-07-23 | 淮阴工学院 | Electrophoresis screening method of charged polydisperse polymer microspheres |
| CN113145314A (en) * | 2021-03-30 | 2021-07-23 | 淮阴工学院 | Electrophoresis screening device of charged polydisperse polymer microspheres |
-
2001
- 2001-10-31 CN CN 01129840 patent/CN1415421A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435968C (en) * | 2004-09-24 | 2008-11-26 | 东北大学 | Electric dust remover with external circulation system and its using method |
| CN101272863B (en) * | 2005-06-14 | 2011-04-20 | 法雷奥热系统公司 | Static deposition device of charged particle in air flow |
| WO2014161122A1 (en) * | 2013-03-31 | 2014-10-09 | Zhao Bing | Side-wrap type air filter apparatus |
| CN104801421A (en) * | 2015-04-29 | 2015-07-29 | 福建卫东实业股份有限公司 | Efficient and environment-friendly fine dust electric dedusting method and equipment used in same |
| CN105709928A (en) * | 2016-04-14 | 2016-06-29 | 南京佳旺安环境科技有限公司 | High-voltage pulse electrostatic dust collector |
| CN107537840A (en) * | 2017-09-18 | 2018-01-05 | 安徽省嘉丰肥业有限公司 | A kind of fertilizer stirring dust exhaust apparatus |
| CN113145313A (en) * | 2021-03-30 | 2021-07-23 | 淮阴工学院 | Electrophoresis screening method of charged polydisperse polymer microspheres |
| CN113145314A (en) * | 2021-03-30 | 2021-07-23 | 淮阴工学院 | Electrophoresis screening device of charged polydisperse polymer microspheres |
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