CN104324805A - Method for capturing PM2.5 fine particles through water mist charged coagulation for electric precipitation - Google Patents
Method for capturing PM2.5 fine particles through water mist charged coagulation for electric precipitation Download PDFInfo
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- CN104324805A CN104324805A CN201310381190.1A CN201310381190A CN104324805A CN 104324805 A CN104324805 A CN 104324805A CN 201310381190 A CN201310381190 A CN 201310381190A CN 104324805 A CN104324805 A CN 104324805A
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Abstract
The invention relates to a method for capturing PM2.5 fine particles through water mist charged coagulation for electric precipitation. The method comprises an electrostatic precipitation part and a liquid atomization part. Atomized liquid droplets are subjected to corona charge in an electric field; the droplets are charged; the charged droplets collide with the fine particles; the fine particles are agglomerated through coagulation; and charges are transferred on the fine particles, thereby improving charging performances of the particles and effectively increasing removal efficiency of the fine particles. The invention also provides a device for capturing the PM2.5 fine particles through water mist charged coagulation for electric precipitation. The device comprises an electrostatic precipitation part and a double-fluid jet atomization part. The double-fluid jet atomization part comprises a gas supply pipeline, a water supply pipeline and a plurality of nozzles. The device is small in occupied area, simple in structure and steady to operate; and the removal efficiency of the fine particles can reach over 95%.
Description
Technical field
The invention belongs to air contaminant treatment field, particularly relate to the method for a kind of electric precipitation water fog charge coalescence trapping PM2.5 minuteness particle.
Background technology
China is the country that equipment manufacturing industry kiln is maximum in the world, according to incompletely statistics, the annual smoke discharge amount of China is all more than 1,000 ten thousand tons, wherein PM2.5 minuteness particle about 4,000,000 tons, a large amount of soot emissions cause serious pollution, for controlling smoke discharge amount, Industrial Stoves are all provided with cleaner, at present, what the flue gas purifying equipment of China's Industrial Stoves had about 90% to adopt is the electrostatic precipitator that cost performance is high, electrostatic precipitator efficiency of dust collection is higher, to the particulate matter removing efficiency of more than particle diameter 10um up to more than 99.6%, but the minuteness particle for below 10um (particularly below PM2.5) is difficult to trapping, the escape of a large amount of minuteness particle causes the discharge of soot dust granule substrate concentration excessive, be difficult to meet existing Atmospheric particulates emission request.Moreover harmful major pollutants are gathered on the dust granules of below 10um mostly, the escape of a large amount of minuteness particle has had a strong impact on the healthy of people.
The conventional method improving electrostatic precipitator efficiency is, increases electric field number and changes purge mode.But through putting into practice confirmation in a large number, simple increase electric field number and change purge mode are still difficult to the emission request meeting Atmospheric particulates, trace it to its cause, the minuteness particle of below 10um (particularly below PM2.5) is difficult to charged, according to electrostatic precipitator principle, fail charged minuteness particle, electrostatic precipitation can not trap.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, by promoting that minuteness particle coalescence is reunited, and improve the charged character of minuteness particle, effectively improve the efficiency that electrostatic precipitator removes minuteness particle, the method for the water fog charge coalescence trapping PM2.5 minuteness particle that a kind of floor space is little, simple structure, investment cost are low, minuteness particle removal efficiency is high is provided.
For achieving the above object, the present invention adopts following technical proposals:
1, this programme comprises electrostatic precipitation part and atomization of liquid part
(1), some groups of two-fluid spray nozzles are installed between electrostatic precipitator air inlet airflow-distribution board and primary electric field or between electrostatic precipitator final stage electric field and penultimate electric field or between electrostatic precipitator penultimate electric field and third from the bottom electric field;
(2), liquid mist containing electrolyte and surfactant is changed into drop by two-fluid spray nozzle, drop enters electric field and carries out corona charging, charged drop carries out secondary-atomizing under the effect of electrostatic field force, form the charged droplet of particle diameter at below 10um, charged droplet and the particle making contact of discharging from Industrial Stoves, on the one hand, it is modified that water smoke carries out cooling to flue gas, on the other hand, particle making contact in charged liquid containing electrolyte and surfactant and flue gas is formed containing wet granular, increase the viscous force between particle, Coulomb force, promote that minuteness particle coalescence is reunited, containing wet granular when drying, electric charge is transferred on particle by force, make minuteness particle charged, what improve minuteness particle is difficult to charged situation, electrically charged particle is under electrostatic field force effect, be attached on dust collector pole, and then by the particulate matter removing in flue gas.
2, the cooling of above-mentioned indication is modified, it is characterized in that: flue-gas temperature controls more than flue gas dew point.
3, the liquid containing electrolyte and surfactant of above-mentioned indication, it is characterized in that: electrolyte selects the salt of strong electrolyte, ionic surfactant selected by surfactant.
Beneficial effect
In the technical program, pass through two-fluid spray nozzle, by the liquid containing electrolyte and surfactant, atomization is injected in electric cleaner, drop corona charging in electric field of atomization, charged droplet and minuteness particle making contact, coalescence reunion minuteness particle, migrated to by force on minuteness particle by electric charge, charged minuteness particle, under the effect of electric field force, is attached on dust collector pole.1, water smoke carries out modified to flue gas, can create the condition of work of applicable electrostatic precipitator.2, theoretical confirmation, when water smoke drop is close with minuteness particle particle size, the chance of absorption, filtration, coalescence is maximum, the technical program, adopts double atomization, and one is two-fluid spray nozzle atomization, two is electrostatic field atomization, by double atomization, can ensure that size droplet diameter is at below 10um.3, the technical program utilizes electric field corona discharge to carry out corona charging to drop, and theoretical confirmation, drop corona charging, entrained by drop, electricity is maximum.4, the charged droplet containing electrolyte and surfactant and minuteness particle making contact, formed containing after wet granular, effectively can increase viscous force, the Coulomb force between particle, promote that minuteness particle coalescence is reunited, improve dust collection efficiency, containing wet granular when drying, electric charge is transferred on particle by force, make minuteness particle charged, improve minuteness particle and be difficult to charged situation, effectively improve the efficiency of electrostatic precipitator.5, the plant area area that provides of the technical program is little, simple structure, investment cost are low, minuteness particle removal efficiency is high.
Accompanying drawing explanation
The process chart of Fig. 1 the technical program embodiment 1
The process chart of Fig. 2 the technical program embodiment 2
1, electric cleaner 2, air inlet airflow-distribution board 3, two-fluid spray nozzle 4, two-fluid spray nozzle supply channel 5, two-fluid spray nozzle supply air line 6, primary electric field 7, final stage electric field 8, high voltage source 9, atomising device 10, water tank 11, feeder
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described
Embodiment 1 as shown in Figure 1, atomising device 9 is by some two-fluid spray nozzles 3 and two-fluid spray nozzle supply channel 4, two-fluid spray nozzle supply air line 5 is formed, to be arranged in electric cleaner 1 between air inlet airflow-distribution board 2 and primary electric field 6, from liquid containing electrolyte and surfactant of two-fluid spray nozzle supply channel 4 and from the air of two-fluid spray nozzle supply air line 5 under the effect of two-fluid spray nozzle 3, forming water smoke Liquid inject enters in primary electric field 6, corona charging in primary electric field 6, the particle making contact carried secretly in charged droplet and flue gas, on the one hand, water smoke carries out modified to flue gas, improve the working condition of electrostatic precipitator, on the other hand, particle making contact in charged liquid containing electrolyte and surfactant and flue gas is formed containing wet granular, viscous force between effective increase particle, Coulomb force, promote that minuteness particle coalescence is reunited, containing wet granular when drying, electric charge is transferred on particle by force, make minuteness particle charged, that improves minuteness particle is difficult to charged situation, effectively improve the efficiency of electrostatic precipitator.
Embodiment 2 as shown in Figure 2, atomising device 9 is by two-fluid spray nozzle 3 and two-fluid spray nozzle supply channel 4, two-fluid spray nozzle supply air line 5 is formed, to be arranged in electric cleaner 1 between final stage electric field 7 and penultimate electric field, from liquid containing electrolyte and surfactant of two-fluid spray nozzle supply channel 4 and from the air of two-fluid spray nozzle supply air line 5 under the effect of two-fluid spray nozzle 3, forming water smoke Liquid inject enters in primary electric field 6, corona charging in primary electric field 6, the particle making contact carried secretly in charged droplet and flue gas, on the one hand, water smoke carries out modified to flue gas, improve the working condition of electrostatic precipitator, on the other hand, particle making contact in charged liquid containing electrolyte and surfactant and flue gas is formed containing wet granular, viscous force between effective increase particle, Coulomb force, promote that minuteness particle coalescence is reunited, containing wet granular when drying, electric charge is transferred on particle by force, make minuteness particle charged, what improve minuteness particle is difficult to charged situation, effectively improve the efficiency of electrostatic precipitator.
Atomising device 9 is arranged between penultimate electric field and third from the bottom electric field by embodiment 3 as different from Example 2, and other is identical, repeats no more.
Claims (3)
1. a method for electric precipitation water fog charge coalescence trapping PM2.5 minuteness particle, is characterized in that: comprise the following steps
(1), some groups of two-fluid spray nozzles are installed between electrostatic precipitator air inlet airflow-distribution board and primary electric field or between electrostatic precipitator final stage electric field and penultimate electric field or between electrostatic precipitator penultimate electric field and third from the bottom electric field, (2), liquid mist containing electrolyte and surfactant is changed into drop by two-fluid spray nozzle, drop enters electric field and carries out corona charging, charged drop carries out secondary-atomizing under the effect of electrostatic field force, form the charged droplet of particle diameter at below 10um, charged droplet and the particle making contact of discharging from Industrial Stoves, it is modified that one side water smoke carries out cooling to flue gas, charged liquid on the other hand containing electrolyte and surfactant and the particle making contact in flue gas are formed and contain wet granular with electric charge, increase the viscous force between particle, Coulomb force, promote that minuteness particle coalescence is reunited, containing wet granular when drying, electric charge is transferred on particle by force, make minuteness particle charged, improve minuteness particle and be difficult to charged situation, electrically charged particle is under electrostatic field force effect, be attached on dust collector pole, and then by the particulate matter removing in flue gas.
2. the method for a kind of electric precipitation water fog charge coalescence trapping PM2.5 minuteness particle according to claim 1, is characterized in that: described cooling is modified, and flue-gas temperature controls more than flue gas dew point.
3. the method for according to claim a kind of electric precipitation water fog charge coalescence trapping PM2.5 minuteness particle, is characterized in that: described electrolyte selects the salt of strong electrolyte, and ionic surfactant selected by described surfactant.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826434A (en) * | 2015-04-29 | 2015-08-12 | 李森 | Nanocluster-plasma haze dust removal method and apparatus thereof |
| CN106583043A (en) * | 2016-12-19 | 2017-04-26 | 航天凯天环保科技股份有限公司 | Outdoor PM2.5 treatment equipment and application thereof |
| CN106823652A (en) * | 2017-02-27 | 2017-06-13 | 西安交通大学 | A kind of system and method for the charged turbulent flow agglomerated particle thing of utilization ultrasonic atomization |
| CN107138016A (en) * | 2017-05-08 | 2017-09-08 | 浙江大学 | Based on many particulate matter coalescence reunion intensifying devices promoted and method |
| CN107262281A (en) * | 2016-04-08 | 2017-10-20 | 北京龙电宏泰环保科技有限公司 | A kind of method for controlling industrial smoke ultra-fine grain and the ultra-clean discharge of trace contaminant |
| CN108273662A (en) * | 2018-01-05 | 2018-07-13 | 老肯医疗科技股份有限公司 | A kind of air purifier removing haze for city |
| CN108362145A (en) * | 2018-03-01 | 2018-08-03 | 山东大学 | A kind of flue gas waste heat recovery heat pipe and flue gas multiple pollutant processing system and method |
| CN108387124A (en) * | 2018-03-01 | 2018-08-10 | 山东大学 | A kind of water fog charge coupling particle modified synergistic electrostatic precipitation system of heat pipe and coordinated desulfurization wastewater treatment |
| CN109127136A (en) * | 2018-07-26 | 2019-01-04 | 清华大学 | The ultra high efficiency low temperature electrical dust collector device reunited based on more |
| CN109731685A (en) * | 2018-12-25 | 2019-05-10 | 袁野 | A kind of moisture condensation formula purification system applied to electric precipitator end |
| CN109759233A (en) * | 2019-01-25 | 2019-05-17 | 东南大学 | A kind of system and method for collaboration processing desulfurization wastewater and reinforcing fine particle reunion and removing |
| CN111306664A (en) * | 2018-12-11 | 2020-06-19 | 弘益大学产学合作团 | A micronic dust clean system for window |
| CN116213116A (en) * | 2022-09-05 | 2023-06-06 | 苏州科技大学 | Atomization corona oil smoke waste gas purification device and purification method |
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| CN1935384A (en) * | 2005-09-20 | 2007-03-28 | 深圳市豪恩电声科技有限公司 | Electrostatic fog remover and electro static fog-removing method |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826434A (en) * | 2015-04-29 | 2015-08-12 | 李森 | Nanocluster-plasma haze dust removal method and apparatus thereof |
| CN107262281A (en) * | 2016-04-08 | 2017-10-20 | 北京龙电宏泰环保科技有限公司 | A kind of method for controlling industrial smoke ultra-fine grain and the ultra-clean discharge of trace contaminant |
| CN106583043A (en) * | 2016-12-19 | 2017-04-26 | 航天凯天环保科技股份有限公司 | Outdoor PM2.5 treatment equipment and application thereof |
| CN106823652B (en) * | 2017-02-27 | 2019-12-20 | 西安交通大学 | System and method for agglomerating particulate matters by using ultrasonic atomization charged turbulence |
| CN106823652A (en) * | 2017-02-27 | 2017-06-13 | 西安交通大学 | A kind of system and method for the charged turbulent flow agglomerated particle thing of utilization ultrasonic atomization |
| CN107138016A (en) * | 2017-05-08 | 2017-09-08 | 浙江大学 | Based on many particulate matter coalescence reunion intensifying devices promoted and method |
| CN108273662A (en) * | 2018-01-05 | 2018-07-13 | 老肯医疗科技股份有限公司 | A kind of air purifier removing haze for city |
| CN108273662B (en) * | 2018-01-05 | 2023-07-18 | 老肯医疗科技股份有限公司 | Air purifier for city haze removal |
| CN108362145A (en) * | 2018-03-01 | 2018-08-03 | 山东大学 | A kind of flue gas waste heat recovery heat pipe and flue gas multiple pollutant processing system and method |
| CN108387124A (en) * | 2018-03-01 | 2018-08-10 | 山东大学 | A kind of water fog charge coupling particle modified synergistic electrostatic precipitation system of heat pipe and coordinated desulfurization wastewater treatment |
| CN108362145B (en) * | 2018-03-01 | 2019-03-29 | 山东大学 | A kind of flue gas waste heat recovery heat pipe and flue gas multiple pollutant processing system and method |
| CN109127136A (en) * | 2018-07-26 | 2019-01-04 | 清华大学 | The ultra high efficiency low temperature electrical dust collector device reunited based on more |
| CN111306664A (en) * | 2018-12-11 | 2020-06-19 | 弘益大学产学合作团 | A micronic dust clean system for window |
| CN111306664B (en) * | 2018-12-11 | 2021-10-26 | 弘益大学产学合作团 | A micronic dust clean system for window |
| CN109731685A (en) * | 2018-12-25 | 2019-05-10 | 袁野 | A kind of moisture condensation formula purification system applied to electric precipitator end |
| CN109759233A (en) * | 2019-01-25 | 2019-05-17 | 东南大学 | A kind of system and method for collaboration processing desulfurization wastewater and reinforcing fine particle reunion and removing |
| CN116213116A (en) * | 2022-09-05 | 2023-06-06 | 苏州科技大学 | Atomization corona oil smoke waste gas purification device and purification method |
| CN116213116B (en) * | 2022-09-05 | 2023-09-19 | 苏州科技大学 | Atomization corona oil smoke waste gas purification device containing atomization corona rotating component and purification method |
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