CN105195327A - Reentrainment control method for low-low temperature electric dust remover - Google Patents

Reentrainment control method for low-low temperature electric dust remover Download PDF

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Publication number
CN105195327A
CN105195327A CN201510547099.1A CN201510547099A CN105195327A CN 105195327 A CN105195327 A CN 105195327A CN 201510547099 A CN201510547099 A CN 201510547099A CN 105195327 A CN105195327 A CN 105195327A
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CN
China
Prior art keywords
rapping
reentrainment
low
control method
dust
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Pending
Application number
CN201510547099.1A
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Chinese (zh)
Inventor
何毓忠
赵海宝
郦建国
姚宇平
俞水林
汤丰
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Zhejiang Feida Environmental Science and Technology Co Ltd
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Zhejiang Feida Environmental Science and Technology Co Ltd
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Application filed by Zhejiang Feida Environmental Science and Technology Co Ltd filed Critical Zhejiang Feida Environmental Science and Technology Co Ltd
Priority to CN201510547099.1A priority Critical patent/CN105195327A/en
Publication of CN105195327A publication Critical patent/CN105195327A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a reentrainment control method for a low-low temperature electric dust remover. The rapping period and the rapping sequence are controlled. As for the rapping period, back corona is not generated, that is, rapping is not conducted when secondary voltage and secondary current of terminal electric fields are not changed obviously, or rapping is conducted once when the dust accumulation thickness of a positive pole plate is 1-2 mm, and the time for rapping the terminal electric fields once is 12-20 hours. As for the rapping sequence, the last two electric fields are not rapped at the same time, all chambers of the terminal electric fields are not rapped at the same time, and the cathodes and anodes of the terminal electric fields are not rapped at the same time. According to the reentrainment control method for the low-low temperature electric dust remover, rotary electrode electric fields are arranged on the downstream of a conventional fixed electric field in the smoke flow direction. Compared with the prior art, the control method has the advantages that by controlling the rapping period and the rapping sequence, shortening rapping time, reducing the rapping frequency and using the staggered rapping mode, reentrainment is reduced, or the rotary electrode electric fields are increased to adsorb smoke dust in smoke and reduce reentrainment; by the adoption of the method, reentrainment can be effectively reduced, and dust removal efficiency is improved.

Description

Low low temp. electric deduster reentrainment of dust control method
Technical field
The present invention relates to low low temp. electric deduster reentrainment of dust control method.
Background technology
Low low temp. electric dedusting technology is electric precipitation new technology, not only can improve dust collection efficiency, meet low emission requirement, and can save electric consumption of coal and reduce power consumption, reduces upstream device specification, removes most SO 3, reduce desulfurization utility rate of water etc., meet national environmental protection policy requirements.
In low low temp. electric deduster, because flue-gas temperature reduces, dust specific resistance reduces, weaken the electrostatic adhesion of the dust trapped on positive plate, thus cause reentrainment of dust phenomenon suitably to increase than low temp. electric deduster, if do not adopt an effective measure, by the efficiency of dust collection of the low low temp. electric deduster of impact.
Summary of the invention
The object of the present invention is to provide low low temp. electric deduster reentrainment of dust control method, effectively can solve existing low low temp. electric deduster reentrainment of dust serious, affect the problem of efficiency of dust collection.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: low low temp. electric deduster reentrainment of dust control method, control shaking cycle and order of rapping, for shaking cycle: do not produce inverse corona not rapping, namely last electric field secondary voltage, secondary current are without significant change just not rapping; Or when positive plate dust stratification thickness reaches 1 ~ 2mm rapping once, the time of last electric field rapping is 12 ~ 20 hours;
For order of rapping: rapping when latter two electric field is different, rapping when each room of last electric field is different, rapping when last electric field negative electrode is different with anode.
Preferably, in low low temp. electric deduster flue gas flow rate lower than 0.8m/s; Reduce flue gas flow rate, make the flue dust in flue gas have the sufficient time to be caught by electric cleaner.
Preferably, the gas approach end of low low temp. electric deduster arranges current equalizer, ensures airflow uniform distribution σ≤0.15 of flue gas, and the maximum dust concentration in local is lower than 30g/m 3; Improve airflow homogeneity, airflow homogeneity is better, and relative local air flow washes away and weakens, the corresponding reduction of local secondary airborne dust.
Low low temp. electric deduster reentrainment of dust control method, by flow of flue gas direction, arranges rotation electrode electric field in conventional stationary electric field downstream.
Compared with prior art, advantage of the present invention is: adopt and control shaking cycle and order of rapping, reduce rapping time and rapping frequency, the mode of dislocation rapping, thus reduction reentrainment of dust, or the flue dust increased in rotation electrode electric field absorption flue gas reduces reentrainment of dust, adopt this method effectively can reduce reentrainment of dust, improve efficiency of dust collection.
Detailed description of the invention
Method one: low low temp. electric deduster reentrainment of dust control method, controls shaking cycle and order of rapping, and for shaking cycle: do not produce inverse corona not rapping, namely last electric field secondary voltage, secondary current are without significant change just not rapping; Or when positive plate dust stratification thickness reaches 1 ~ 2mm rapping once, the time of last electric field rapping is 12 ~ 20 hours;
For order of rapping: rapping when latter two electric field is different, rapping when each room of last electric field is different, rapping when last electric field negative electrode is different with anode.
In low low temp. electric deduster, flue gas flow rate is lower than 0.8m/s, and the gas approach end of low low temp. electric deduster arranges current equalizer, as porous plate, ensures airflow uniform distribution σ≤0.15 of flue gas, and the maximum dust concentration in local is lower than 30g/m 3.
Method two: low low temp. electric deduster reentrainment of dust control method, by flow of flue gas direction, arranges rotation electrode electric field in conventional stationary electric field downstream.Rotating electrode type electric field can clean by holding anode plate, avoids inverse corona, effectively solves high resistivity dust and to gather dust difficult problem; Reduce reentrainment of dust to greatest extent, significantly reduce electric cleaner outlet dust concentration.
Above-mentioned two kinds of modes can also be combined use, reach the object reducing reentrainment of dust.
The foregoing is only specific embodiments of the invention, but technical characteristic of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.

Claims (4)

1. low low temp. electric deduster reentrainment of dust control method, is characterized in that: control shaking cycle and order of rapping, for shaking cycle: do not produce inverse corona just not rapping, namely last electric field secondary voltage, secondary current are without significant change just not rapping; Or when positive plate dust stratification thickness reaches 1 ~ 2mm rapping once, the time of last electric field rapping is 12 ~ 20 hours;
For order of rapping: rapping when latter two electric field is different, rapping when each room of last electric field is different, rapping when last electric field negative electrode is different with anode.
2. low low temp. electric deduster reentrainment of dust control method as claimed in claim 1, is characterized in that: in low low temp. electric deduster, flue gas flow rate is lower than 0.8m/s.
3. low low temp. electric deduster reentrainment of dust control method as claimed in claim 1, is characterized in that: the gas approach end of low low temp. electric deduster arranges current equalizer, ensures airflow uniform distribution σ≤0.15 of flue gas, and the maximum dust concentration in local is lower than 30g/m 3.
4. low low temp. electric deduster reentrainment of dust control method, is characterized in that: by flow of flue gas direction, arranges rotation electrode electric field in conventional stationary electric field downstream.
CN201510547099.1A 2015-08-31 2015-08-31 Reentrainment control method for low-low temperature electric dust remover Pending CN105195327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510547099.1A CN105195327A (en) 2015-08-31 2015-08-31 Reentrainment control method for low-low temperature electric dust remover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510547099.1A CN105195327A (en) 2015-08-31 2015-08-31 Reentrainment control method for low-low temperature electric dust remover

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Publication Number Publication Date
CN105195327A true CN105195327A (en) 2015-12-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106583049A (en) * 2017-01-06 2017-04-26 浙江浙能嘉华发电有限公司 Control method for preventing electric dust removal caking blockage
CN110124866A (en) * 2019-04-01 2019-08-16 新疆天富能源股份有限公司 A kind of ESP Efficiency optimization method
CN112495588A (en) * 2019-09-13 2021-03-16 赵红文 Reverse-order rapping method of electric precipitation anode plate for flue gas treatment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08252482A (en) * 1995-03-15 1996-10-01 Ikuo Tochisawa Method for electric dust collection and apparatus therefor
JPH11221488A (en) * 1998-02-04 1999-08-17 Erudekku:Kk Electric dust collecting apparatus
CN2875598Y (en) * 2006-01-06 2007-03-07 上海西重所重型机械成套有限公司 Electric dust precipitator
CN201454686U (en) * 2009-06-11 2010-05-12 青岛威特水煤浆技术开发有限公司 Electrostatic dust removing equipment
CN102416362A (en) * 2011-12-16 2012-04-18 江苏科行环境工程技术有限公司 Air flow uniform distribution device for electric dust remover
CN202410839U (en) * 2012-01-30 2012-09-05 中国电力投资集团公司 Electrostatic dust collector
CN202590963U (en) * 2012-06-05 2012-12-12 国电南京自动化股份有限公司 Energy-saving electrical dust precipitator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08252482A (en) * 1995-03-15 1996-10-01 Ikuo Tochisawa Method for electric dust collection and apparatus therefor
JPH11221488A (en) * 1998-02-04 1999-08-17 Erudekku:Kk Electric dust collecting apparatus
CN2875598Y (en) * 2006-01-06 2007-03-07 上海西重所重型机械成套有限公司 Electric dust precipitator
CN201454686U (en) * 2009-06-11 2010-05-12 青岛威特水煤浆技术开发有限公司 Electrostatic dust removing equipment
CN102416362A (en) * 2011-12-16 2012-04-18 江苏科行环境工程技术有限公司 Air flow uniform distribution device for electric dust remover
CN202410839U (en) * 2012-01-30 2012-09-05 中国电力投资集团公司 Electrostatic dust collector
CN202590963U (en) * 2012-06-05 2012-12-12 国电南京自动化股份有限公司 Energy-saving electrical dust precipitator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106583049A (en) * 2017-01-06 2017-04-26 浙江浙能嘉华发电有限公司 Control method for preventing electric dust removal caking blockage
CN110124866A (en) * 2019-04-01 2019-08-16 新疆天富能源股份有限公司 A kind of ESP Efficiency optimization method
CN112495588A (en) * 2019-09-13 2021-03-16 赵红文 Reverse-order rapping method of electric precipitation anode plate for flue gas treatment

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Application publication date: 20151230