CN104069712A - Chemical coagulation-based 'electricity-bag' integrated compound dust removing process - Google Patents

Chemical coagulation-based 'electricity-bag' integrated compound dust removing process Download PDF

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Publication number
CN104069712A
CN104069712A CN201410332000.1A CN201410332000A CN104069712A CN 104069712 A CN104069712 A CN 104069712A CN 201410332000 A CN201410332000 A CN 201410332000A CN 104069712 A CN104069712 A CN 104069712A
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China
Prior art keywords
dust
bag
flue gas
coalescence
electricity
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CN201410332000.1A
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Chinese (zh)
Inventor
金建祥
沈丹
张峰
赵君
周佳玮
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盐城工学院
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Priority to CN201410332000.1A priority Critical patent/CN104069712A/en
Publication of CN104069712A publication Critical patent/CN104069712A/en

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Abstract

The invention discloses a chemical coagulation-based 'electricity-bag' integrated compound dust removing process. Aiming at the problems of low coagulation efficiency, complicated process, difficulty in control of operation and the like of an existing dust removal process, superfine particles are chemically coagulated in front of an 'electricity-bag' integrated dust removal device so as to be subjected to electric coagulation into larger particles, thereby being smoothly removed from the 'electricity-bag' integrated dust remover; and micro-fine particles are further removed through dust removal of a cloth bag, which is used as a gating processing part of up-to-standard release, and then the micro-fine particles are exhausted out of an exhaust cylinder through an induced draft fan, so that the up-to-standard release is achieved. On the basis of chemical coagulation, an electrostatic precipitator-cloth bag dust removal combined mode is adopted, thus the total dust removal efficiency of the whole process reaches above 99.9 percent, the exhaust concentration of dust in smoke is less than 30 mg/Nm<3>, and the removal rate of PM2.5 (Particulate Matter) in exhausted smoke is increased by about 50 percent.

Description

" electricity-bag " one composite dedusting technique based on chemical coalescence
Technical field
The invention belongs to flue gas ash removal process field, relate to a kind of flue gas de-dusting process.
Background technology
In recent years, China's big and medium-sized cities haze weather is more and more, has had a strong impact on city dweller's working healthily and life, wherein PM in urban environment 2.5(be mainly PM 0.4-1.0) too high levels is the main cause that causes haze weather.Therefore, how to control PM 2.5produce, and reduce its existence, become problem demanding prompt solution.
PM 2.5be mainly derived from burning (comprising boiler smoke, vehicle exhaust etc.) and the airborne dust of the fossil fuels such as coal, oil, natural gas, China take coal and is that main energy resource structure can not change for a long time.The main flow device of the soot emissions of coal fired power plant control is at present dry electric precipitation devices, and efficiency of dust collection in mass can reach more than 99.5%, but to PM 2.5capture rate relatively low, in quantitative terms still have and account for more than 90% PM of flying dust sum 2.5enter in people's atmosphere.
Chinese patent CN101664623A discloses and has related to the ultrafine particle deduster of administering for industrial fumes.Specifically, by the electric-bag complex dust collector of existing cascade filtration mode is improved, between the outlet of filter bag dedusting mechanism and the import of air-introduced machine, be provided with turbulent eddy mechanism, this turbulent eddy mechanism comprises turbulent eddy chamber, flue dust inlet tube and flue dust outlet.Turbulent eddy chamber is that cross section is down the bucket-shaped of isosceles trapezoid, and its bottom is connecting grey small room.The flue dust that contains relatively fine particle thing of processing through the second level enters flue dust inlet tube, through wind deflector, air-flow is deflected down, enter turbulent eddy chamber, relatively fine particle thing and turbulent eddy chamber interior walls produce diffusion and collision impels minuteness particle precipitation, and fine particle is separated from flue dust.But the materialization coalescence that carries out separately fine particle in this treatment process with turbulent eddy chamber, coalescence efficiency is not high.
Chinese patent CN 102423599 A disclose a kind of integrated electricity bag composite purification device and purification method that removes industrial discharged superfine and trace contaminant.Employing is disposed with the version of the pre-spray equipment of adsorbent, electrostatic precipitator, ultra-fine grain coalescence device, adsorbent jetting device and bag-type dust collector along airflow direction, provide that a kind of compact conformation, operating cost are low, maintenance and operation maintenance is convenient, the integrated electricity bag composite purification device and the purification method that efficiently remove ultra-fine and trace contaminant when removing constant dust pollution thing.Chinese patent CN 103007670 A control fine particle, and the electric-bag complex dust collector of collaborative demercuration, relates to industrial dust collector.Be provided with electric-bag complex dust collector, adsorbent jetting device and absorbent container; Electric-bag complex dust collector is provided with import loudspeaker, housing, electric field region, electricity bag transition region, bag-type dusting district, ash bucket, air-purifying chamber and exhaust pass; Import loudspeaker are located at the import of housing, and electric field region, electricity bag transition region and bag-type dusting district are located in housing, and the rear of import loudspeaker is located in electric field region, and electricity bag transition region is located between electric field region and bag-type dusting district; Ash bucket is located at the bottom of housing, and air-purifying chamber is located at top, bag-type dusting district, and exhaust pass is located at air-purifying chamber top and is communicated with air-purifying chamber; Adsorbent jetting device and absorbent container are located at the top of electricity bag transition region, and the discharging opening of absorbent container is connected with the charging aperture of adsorbent jetting device.Can make absorbent fully mix with flue gas, absorbent is more evenly distributed, absorbent demercuration better effects if.Above process complex process, controlling run difficulty, equipment investment and operating cost are high.
Thereby, the problems such as, complex process not high for coalescence efficiency, controlling run difficulty, on the basis of existing technology necessary, the composite dedusting technique of research and development strengthening coalescence.On the basis of " electricity-bag " integrated dust collector, set up coalescence treating apparatus, make superfine particulate matter become larger particles by chemical method or physical method coalescence, thereby remove smoothly in " electricity-bag " integrated dust collector, be the trend of present dedusting technology development.
Summary of the invention
Goal of the invention: the object of the invention is in order to solve the deficiencies in the prior art, a kind of " electricity-bag " one composite dedusting technique based on chemical coalescence is provided.
Technical scheme: in order to realize object of the present invention, the technical solution used in the present invention is:
" electricity-bag " one composite dedusting technique based on chemical coalescence, is characterised in that: comprise the following steps successively:
(1) ash-laden gas enters in the flue before " electricity-bag " integrated dust collector, by dosing pump, coalescence promoter and water are fully mixed, after mixing, coalescence accelerator solution is also sent in the flue before sack cleaner through double-current atomizer by the pressure of air compressor, forms mist cloud the main flue gas containing fine dust is carried out to chemical coalescence;
(2) through spraying, the flue gas after coalescence enters " electricity-bag " integrated dust collector device and carries out dust removal process, first enters electric precipitation part, carries out dust removal process, dust is by charged, under the effect of electric field force, be deposited in ash bucket, dust granules removes from flue gas, and flue gas is purified;
(3) flue gas of processing through electric precipitation enters bag-type dust and partly carries out dust removal process, and particle remaining in flue gas is by Bag filter, then by rapping mode, sedimentation focuses in ash bucket;
(4) flue gas after integrated dust collector is processed through " electricity-bag ", discharges the flue gas that reaches discharge standard after purifying by air-introduced machine from aiutage.
The mass percent that coalescence promoter described in step (1) accounts for water is 0.05~2.5% ask; It is 0.05%~1% that coalescence accelerator solution flow accounts for flue gas flow percent by volume, makes its impact on flue-gas temperature be no more than 20 ℃.
The aiutage that dust collecting process provided by the invention is applicable to industrial fumes processing discharges the previous processing of gathering dust.Pending flue gas enters flue, by dosing pump, coalescence promoter and water are fully mixed, after mixing, coalescence accelerator solution is also sent in the flue before deduster through double-current atomizer by the pressure of air compressor, forms mist cloud the main flue gas containing fine dust is carried out to chemical coalescence; The coalescence promoter spraying into is formed with certain diffusion angle and the surperficial mist cloud with higher adhesion activity under the double-current atomizer effect of brute force after fragmentation, mist cloud is adsorbed in fly ash granule surface, between particle, produce liquid bridge, in flue before deduster, and then be converted into Gu Qiao, promote particle coalescence, make fine particle form larger agglomerate, and fine particle is adsorbed by coarse granule.Ash-laden gas after chemistry coalescence enters " electricity-bag " one dust arrester by pipeline, carries out dust removal process, and during through electric precipitation part, dust, by charged, is deposited in ash bucket under the effect of electric field force, and dust granules removes from flue gas, and flue gas is purified; During through bag-type dust part, remaining particle is by Bag filter, then by rapping mode, sedimentation focuses in ash bucket; The efficiency of dust collection of the deduster further improving to fine particle.
Flue gas after " electricity-bag " one dust removal process, discharges the flue gas that reaches discharge standard after purifying by air-introduced machine from aiutage.
Beneficial effect: technique provided by the invention is compared and had the following advantages with existing technology:
(1) the present invention mainly by carrying out chemical coalescence to superfine particulate matter before " electricity-bag " one dust arrester, enable to be removed under the effect of electrostatic precipitator, cross method provided by the invention and can improve the removal efficiency of electrostatic precipitator to superfine particulate matter, reduce the discharge of ultra-fine flue dust.Adopt the method to process and make ultra-fine flue dust coalescence become the particle of greater particle size, and removed by electrostatic precipitator, can not affect under the duty of electrostatic precipitator and the condition of collection mode PM in flue dust 2.5clearance improves 30% left and right.
(2) mode of electric precipitation-bag-type dust of the present invention coupling, has utilized electric precipitation principle and bag-type dust principle, and using bag-type dust part as processing the workshop section of checking on up to standard.On the basis of chemical coalescence, adopt the mode of electric precipitation-bag-type dust coupling, the total efficiency of dust collection of whole technique is more than 99.9%, and dust contained flue gas concentration of emission is at 30mg/Nm 3, PM in discharge flue gas 2.5clearance improves 50% left and right.
Accompanying drawing explanation
Fig. 1 is " electricity-bag " one composite dedusting process schematic representation based on chemical coalescence provided by the invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
Embodiment 1
Certain industrial fumes waste gas, treating capacity is 100000m 3/ h adopts " electricity-bag " the one composite dedusting technique based on chemical coalescence, comprises the following steps successively:
(1) ash-laden gas enters in the flue before " electricity-bag " integrated dust collector, by dosing pump, coalescence promoter and water are fully mixed, after mixing, coalescence accelerator solution is also sent in the flue before sack cleaner through double-current atomizer by the pressure of air compressor, forms mist cloud the main flue gas containing fine dust is carried out to chemical coalescence; The mass percent that described coalescence promoter accounts for water is 1.5%; It is 0.05% that coalescence accelerator solution flow accounts for flue gas flow percent by volume, makes its impact on flue-gas temperature be no more than 20 ℃;
(2) through spraying, the flue gas after coalescence enters " electricity-bag " integrated dust collector device and carries out dust removal process, first enters electric precipitation part, carries out dust removal process, dust is by charged, under the effect of electric field force, be deposited in ash bucket, dust granules removes from flue gas, and flue gas is purified;
(3) flue gas of processing through electric precipitation enters bag-type dust and partly carries out dust removal process, and particle remaining in flue gas is by Bag filter, then by rapping mode, sedimentation focuses in ash bucket;
(4) flue gas after integrated dust collector is processed through " electricity-bag ", discharges the flue gas that reaches discharge standard after purifying by air-introduced machine from aiutage.
In this example, pending flue gas enters flue, by dosing pump, coalescence promoter and water are fully mixed, after mixing, coalescence accelerator solution is also sent in the flue before deduster through double-current atomizer by the pressure of air compressor, forms mist cloud the main flue gas containing fine dust is carried out to chemical coalescence; The coalescence promoter spraying into is formed with certain diffusion angle and the surperficial mist cloud with higher adhesion activity under the double-current atomizer effect of brute force after fragmentation, mist cloud is adsorbed in fly ash granule surface, between particle, produce liquid bridge, in flue before deduster, and then be converted into Gu Qiao, promote particle coalescence, make fine particle form larger agglomerate, and fine particle is adsorbed by coarse granule.Ash-laden gas after chemistry coalescence enters " electricity-bag " one dust arrester by pipeline, carries out dust removal process, and during through electric precipitation part, dust, by charged, is deposited in ash bucket under the effect of electric field force, and dust granules removes from flue gas, and flue gas is purified; During through bag-type dust part, remaining particle is by Bag filter, then by rapping mode, sedimentation focuses in ash bucket; The efficiency of dust collection of the deduster further improving to fine particle.
Flue gas after " electricity-bag " one dust removal process, discharges the flue gas that reaches discharge standard after purifying by air-introduced machine from aiutage.
The mode of electric precipitation-bag-type dust coupling that this example adopts, has utilized electric precipitation principle and bag-type dust principle, and using bag-type dust as processing the workshop section of checking on up to standard.Adopt the method to process and make ultra-fine flue dust coalescence become the particle of greater particle size, and removed by electrostatic precipitator, can not affect under the duty of electrostatic precipitator and the condition of collection mode PM in flue dust 2.5clearance improves 30% left and right.On the basis of chemical coalescence, adopt the mode of electric precipitation-bag-type dust coupling, the total efficiency of dust collection of whole technique is more than 99.95%, and dust contained flue gas concentration of emission is less than 30mg/Nm 3, PM in discharge flue gas 2.5clearance improves 50% left and right.

Claims (2)

1. " electricity-bag " one composite dedusting technique based on chemical coalescence, is characterized in that: comprise the following steps successively:
(1) ash-laden gas enters in the flue before " electricity-bag " integrated dust collector, by dosing pump, coalescence promoter and water are fully mixed, after mixing, coalescence accelerator solution is also sent in the flue before sack cleaner through double-current atomizer by the pressure of air compressor, forms mist cloud the main flue gas containing fine dust is carried out to chemical coalescence;
(2) through spraying, the flue gas after coalescence enters " electricity-bag " integrated dust collector device and carries out dust removal process, first enters electric precipitation part, carries out dust removal process, dust is by charged, under the effect of electric field force, be deposited in ash bucket, dust granules removes from flue gas, and flue gas is purified;
(3) flue gas of processing through electric precipitation enters bag-type dust and partly carries out dust removal process, and particle remaining in flue gas is by Bag filter, then by rapping mode, sedimentation focuses in ash bucket;
(4) flue gas after integrated dust collector is processed through " electricity-bag ", discharges the flue gas that reaches discharge standard after purifying by air-introduced machine from aiutage.
2. dust collecting process according to claim 1, is characterized in that: the mass percent that described in step (1), coalescence promoter accounts for water is 0.05~2.5%; It is 0.05%~1% that coalescence accelerator solution flow accounts for flue gas flow percent by volume.
CN201410332000.1A 2014-07-06 2014-07-06 Chemical coagulation-based 'electricity-bag' integrated compound dust removing process CN104069712A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106621665A (en) * 2016-12-27 2017-05-10 盐城工学院 Combined ultrafine particle coagulation box
CN106693593A (en) * 2016-12-27 2017-05-24 盐城工学院 Double-ejection type angle type ultrafine particle coagulation tank
CN106693592A (en) * 2016-12-27 2017-05-24 盐城工学院 Double-jet type streamlined ultra-fine particle coagulation box
CN106731437A (en) * 2016-12-27 2017-05-31 盐城工学院 The horizontal anchor type ultra-fine grain coalescence case of double jet type
CN106731391A (en) * 2016-12-27 2017-05-31 盐城工学院 The horizontal Y types ultra-fine grain coalescence case of double jet type
CN108579300A (en) * 2018-05-17 2018-09-28 柏美迪康环境科技(上海)股份有限公司 A kind of steel plant's blast furnace flue gas wet purification processing method and system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1076126A (en) * 1996-08-30 1998-03-24 Amano Corp Ultrasonic collecting method of suspended particle and device therefor
CN1562444A (en) * 2004-04-10 2005-01-12 华中科技大学 Acceleration method of birdnesting ultrafine partieles of coal and equipment
CN102294161A (en) * 2011-07-15 2011-12-28 沈阳环境科学研究院 Method for simultaneously removing dioxin and heavy metals from incineration smoke
US20120067213A1 (en) * 2010-09-21 2012-03-22 General Electric Company Method and apparatus for air pollution control
CN102500183A (en) * 2011-11-03 2012-06-20 中国华能集团清洁能源技术研究院有限公司 Flue gas purification system capable of simultaneously realizing high-efficiency dust removal and mercury removal
CN103623669A (en) * 2013-12-10 2014-03-12 福建龙净环保股份有限公司 Electric-bag composite dust collector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1076126A (en) * 1996-08-30 1998-03-24 Amano Corp Ultrasonic collecting method of suspended particle and device therefor
CN1562444A (en) * 2004-04-10 2005-01-12 华中科技大学 Acceleration method of birdnesting ultrafine partieles of coal and equipment
US20120067213A1 (en) * 2010-09-21 2012-03-22 General Electric Company Method and apparatus for air pollution control
CN102294161A (en) * 2011-07-15 2011-12-28 沈阳环境科学研究院 Method for simultaneously removing dioxin and heavy metals from incineration smoke
CN102500183A (en) * 2011-11-03 2012-06-20 中国华能集团清洁能源技术研究院有限公司 Flue gas purification system capable of simultaneously realizing high-efficiency dust removal and mercury removal
CN103623669A (en) * 2013-12-10 2014-03-12 福建龙净环保股份有限公司 Electric-bag composite dust collector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106621665A (en) * 2016-12-27 2017-05-10 盐城工学院 Combined ultrafine particle coagulation box
CN106693593A (en) * 2016-12-27 2017-05-24 盐城工学院 Double-ejection type angle type ultrafine particle coagulation tank
CN106693592A (en) * 2016-12-27 2017-05-24 盐城工学院 Double-jet type streamlined ultra-fine particle coagulation box
CN106731437A (en) * 2016-12-27 2017-05-31 盐城工学院 The horizontal anchor type ultra-fine grain coalescence case of double jet type
CN106731391A (en) * 2016-12-27 2017-05-31 盐城工学院 The horizontal Y types ultra-fine grain coalescence case of double jet type
CN108579300A (en) * 2018-05-17 2018-09-28 柏美迪康环境科技(上海)股份有限公司 A kind of steel plant's blast furnace flue gas wet purification processing method and system

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Application publication date: 20141001