CN106621681A - Joining type variable speed ultrafine particle coagulation tank - Google Patents

Joining type variable speed ultrafine particle coagulation tank Download PDF

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Publication number
CN106621681A
CN106621681A CN201611227191.0A CN201611227191A CN106621681A CN 106621681 A CN106621681 A CN 106621681A CN 201611227191 A CN201611227191 A CN 201611227191A CN 106621681 A CN106621681 A CN 106621681A
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CN
China
Prior art keywords
coalescence
area
case
coagulation
waveform
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201611227191.0A
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Chinese (zh)
Inventor
刘本志
金建祥
罗娜
李朝霞
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Yangcheng Institute of Technology
Yancheng Institute of Technology
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Yangcheng Institute of Technology
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Priority to CN201611227191.0A priority Critical patent/CN106621681A/en
Publication of CN106621681A publication Critical patent/CN106621681A/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D51/00Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/02Amassing the particles, e.g. by flocculation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D51/00Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/02Amassing the particles, e.g. by flocculation
    • B01D51/04Amassing the particles, e.g. by flocculation by seeding, e.g. by adding particles

Abstract

The invention discloses a joining type variable speed ultrafine particle coagulation tank. The whole coagulation tank is a tank type and is suitable for being installed between an electric deduster and a bag deduster, the coagulation tank comprises a gas inlet, a gas outlet, a coagulation zone and ash buckets, the gas inlet is a channel behind the electric deduster, the flue gas comes from the electric deduster, the coagulation zone is provided with wave-shaped partition plates, the dust particle is strengthened and coagulated in a channel between the wave-shaped partition plates, the gas outlet is formed in the lower part of the coagulation zone and above the ash buckets to be arranged into an overflowing channel, an adsorbent like activated carbon, a coagulation accelerant and the like pass through a drainage tube and are sprayed into the coagulation zone through a spraying nozzle, and the coagulated flue gas enters the bag deduster to be treated. The joining type variable speed ultrafine particle coagulation tank is strongly targeted and is wide in applicable range, optimized in structure, and high in reliability.

Description

One kind crosses formula speed change ultra-fine grain coalescence case
Technical field
The invention belongs to flue gas ash removal process field, it is related to one kind and crosses formula speed change ultra-fine grain coalescence case.
Background technology
In recent years, China big and medium-sized cities haze weather is more and more, has had a strong impact on working healthily and the life of city dweller It is living, wherein PM in urban environment2.5(predominantly PM0.4-1.0) too high levels are the main causes for causing haze weather.Therefore, such as What control PM2.5Produce, and reduce its presence, become problem demanding prompt solution.
Chinese patent CN101664623A discloses the ultrafine particle deduster for being related to administer for industrial fumes.Specifically Improved by the electric-bag complex dust collector to existing cascade filtration mode, in the outlet and the import of air-introduced machine of filter bag dedusting mechanism Between be provided with turbulent eddy mechanism, the turbulent eddy mechanism include turbulent eddy room, flue dust inlet tube and flue dust outlet.Turbulent flow Vortex chamber is down the bucket-shaped of isosceles trapezoid for cross section, and its bottom is connected to grey small room.Through second level process containing thinner The flue dust of particulate matter enters flue dust inlet tube, through wind deflector, deflects down air-flow, into turbulent eddy room, more carefully Particulate matter produces diffusion with turbulent eddy chamber interior walls and collision promotes minuteness particle to precipitate, and fine particle is separated from flue dust Out.But the materialization coalescence of fine particle is individually carried out in the handling process with turbulent eddy room, coalescence efficiency is not high.
Chinese patent CN 102423599 A disclose a kind of integration removing industrial discharged superfine and trace contaminant Electric bag composite purification device and purification method.Device, electrostatic precipitation is preliminarily sprayed using adsorbent is disposed with along airflow direction The version of device, ultra-fine grain coalescence device, adsorbent jetting device and bag-type dust collector, there is provided a kind of structure is tight Gather, operating cost is low, maintenance and operation maintenance are convenient, efficient removal is ultra-fine and micro while constant dust pollution thing is removed The integration electricity bag composite purification device of pollutant and purification method.Ultra-fine grain coalescence device is by groups such as positive high voltage sparking electrodes Into.Ultra-fine grain coalescence device does not form good coalescence condition without specific construction in addition to charged.Chinese patent CN 103007670 A control fine particle, cooperate with the electric-bag complex dust collector of demercuration, are related to industrial dust collector.Electric bag composite dedusting Device is provided with electric bag transition region, and electric bag transition region is located between electric field region and bag-type dusting area;Ash bucket is located at the bottom of housing, net gas Room connects located at air-purifying chamber top and with air-purifying chamber located at bag-type dusting area top, exhaust pass;Adsorbent jetting device and suction Attached agent container is connected located at the top of electric bag transition region, the discharging opening of absorbent container with the charging aperture of adsorbent jetting device. Absorbent can be made to be sufficiently mixed with flue gas, absorbent is more evenly distributed, absorbent demercuration effect is more preferable.Electric bag transition region is provided with At least 2 groups positive plates and discharge electrode, positive plate and discharge electrode constitute electric field channel.
Process above equipment, method is complicated, control runs difficult, equipment investment and operating cost is high.
Thus, for coalescence is inefficient, complex process equipment the problems such as, it is necessary on the basis of existing technology, The ultra-fine grain coalescence case of research and development reinforcing coalescence.On the basis of traditional deduster, coalescence processing meanss are set up, make to surpass Fine particle, into larger particles, is existing so as to smoothly remove in follow-up deduster by physical method or physical chemistry method coalescence In the trend of dedusting technology development.
The content of the invention
Goal of the invention:The invention aims to solve the deficiencies in the prior art, a kind of with strong points, adaptive surface is proposed Extensively, constitution optimization, the ultra-fine grain coalescence case of the reinforcing coalescence of good reliability.
Technical scheme:In order to realize the purpose of the present invention, the present invention is adopted the following technical scheme that.
One kind crosses formula speed change ultra-fine grain coalescence case, and whole coalescence case is adapted to mount to electricity-bag dust collector in box Between;Coalescence case is made up of air inlet, gas outlet, coalescence area and ash bucket;Air inlet be electric cleaner after passage, flue gas by Electric cleaner;Coalescence area is provided with waveform dividing plate, and dust granules are strengthened in the passage between waveform dividing plate Coalescence;Gas outlet is located at coalescence area bottom, and ash bucket top is arranged to flow channels, and the flue gas after Jing coalescences is removed into pocket type Dirt device is processed;Ash bucket is arranged at coalescence area lower section, concordant with other ash buckets of electricity-bag dust collector.
Further, the waveform dividing plate for arranging in coalescence area is horizontally disposed;Two pieces of adjacent waveform dividing plate waveforms become Change corresponding setting, define the passage of flow section change;Communicate between two pieces of adjacent waveform dividing plates, there is the section that crosses, Cross a section interval setting;Waveform divider height is 10 ~ 15cm;Spacing between two pieces of adjacent waveform dividing plates takes 30 ~ 40cm。
Further, in the porch in coalescence area, vertically arranged one group of nozzle, nozzle is connected by pipeline with air pump, can The adsorbents such as activated carbon are sprayed into into coalescence area by guiding tube Jing nozzles.
Further, in the porch in coalescence area, vertically arranged one group of nozzle, by filling coalescence accelerator and water with liquid pump Divide mixing, mixed coalescence accelerator solution accesses nozzle Jing after atomization by guiding tube, spray into coalescence area, formation mist cloud.
Coalescence case operation principle:Through electric cleaner process flue gas subsequently into condensation region, at this moment with ultra-fine in flue gas Particulate matter is in the majority, and by the lower collision cohesion of " turbulent flow coalescence " effect, ultra-fine grain becomes bulky grain, as particle coarsening;Connect And enter into follow-up inside of bag type dust collector, the particle of coarsening is easy to deduster to gather dust, so just reduce ultra-fine grain Discharge.
" turbulent flow coalescence " is referred to by special construction, causes the change of flue gas stream, forms the state of close turbulent flow.It is solidifying And major influence factors be granular size, the cohesion performance of particle and collision probability.Turbulent flow considerably increases particle in flue gas Collision probability.Due to the special tectonic of coalescer, the passage that flow section is continually changing is constituted between waveform dividing plate, made The flow velocity of air-flow of must passing by constantly changes.And particle therein due to it is different from smoke density and can not completely with the stream of air-flow Speed changes and changes, and especially larger particle has inertia, for the reaction of velocity variations will postpone than ultra-fine grain.Therefore In undulating path during excessively stream, at branch's air-flow velocity change, obvious speed is there is between bulky grain and ultra-fine grain Gradient.This velocity gradient energy increase products collision probability, significantly increases coalescence effect.Branch's air-flow velocity change in coalescer Place becomes the main generation area of turbulent flow coalescence.The section that crosses is communicated between two pieces of adjacent waveform dividing plates so that with difference The size particles of speed are not limited in original passage, and are crossed with lower channel, and further increase products collision probability enters One step embodies turbulent flow coalescence caused by velocity gradient.
Chemical coalescence principle:The coalescence accelerator of penetrating is formed with after crushing certain angle of flare under atomizer effect The mist cloud of degree and surface with higher adhesion activity, mist cloud is adsorbed in fly ash granule surface, liquid bridge is produced between particles, In flue before sack cleaner, and then Gu Qiao is converted into, promotes particle coalescence, make fine particle form larger agglomerate, with And fine particle is adsorbed by coarse granule.
The acticarbon injection apparatus that the present invention is adopted, is to spray into powdered active carbon before particle coalescence, is passed through The suction-operated of acticarbon to remove flue gas in mercury.It is the most effective removal of mercury that acticarbon is sprayed in flue gas One of method.Adsorbent is that the cellular of formation, specific surface area are enriched after the modified activation of flyash with certain phosphorus content Particulate matter, while have physics and chemisorbed function, its average grain diameter at 20 μm or so, specific surface area>55m2/ g, flying dust Phosphorus content is 6% ~ 7% or so.
Beneficial effect:The device that the present invention is provided is compared with advantages below with existing apparatus.
(1)By special tectonic provided by the present invention, coalescence efficiency, PM are improve2.5The quantity for accounting for particle in flue dust is dense , compared with declining 40% ~ 60% before coalescence, mass concentration is compared with decline 5 ~ 15% before coalescence for degree.
(2)Coalescence case provided by the present invention substantially reduces PM2.5Discharge.The present invention is mainly by sack cleaner It is front that coalescence is carried out to superfine particulate matter, enable to be removed in the presence of sack cleaner, the device that the present invention is provided Removal efficiency of the electricity-bag dust collector to superfine particulate matter can be improved, the discharge of ultra-fine flue dust is reduced.Can remove in equal Under conditions of the working condition and collection mode of dirt device, PM in flue dust2.5Clearance improves 40% ~ 60%.
(3)The each several part of coalescence case provided by the present invention, rationally, function is compatible to be matched subregion.
(4)Coalescence case provided by the present invention creates condition for the volume reduction of electricity-bag dust collector.
(5)Coalescence case provided by the present invention reduces investment, simplifies operation, and drag losses is little, reduced pressure, reduces Energy consumption, operating cost is low.
(6)Coalescence case provided by the present invention is easy for installation, adapts to wide, is suitable to locate in advance before various sack cleaners Reason, also improves adaptability of the electricity-bag dust collector to various different industrial fumes.
(7)Coalescence case provided by the present invention provides new thinking for the transformation of electric cleaner.
Description of the drawings
Fig. 1 crosses formula speed change ultra-fine grain coalescence box structure schematic diagram for one kind for providing of the present invention.
In FIG:1:Electric cleaner, 2:Sack cleaner, 3:Coalescence case, 4:Air inlet, 5:Coalescence area, 6:Outlet Mouthful, 7:Ash bucket, 8:Waveform dividing plate, 9:Guiding tube, 10:Nozzle, 11:Baffle plate, A:At branch's air-flow velocity change, B, C, D:At flow channels different section, E:Air-flow intersection of branch.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is further elucidated.
Embodiment 1
Certain industrial fumes waste gas, treating capacity is 80000m3The coalescence case that/h is provided using the present invention.Whole coalescence case in box, It is adapted to mount between electricity-bag dust collector;Coalescence case is made up of air inlet, gas outlet, coalescence area and ash bucket;Air inlet is electricity Passage after deduster, flue gas is by electric cleaner;Coalescence area is provided with waveform dividing plate, dust granules waveform every Reinforcing coalescence is carried out in passage between plate;Gas outlet is located at coalescence area bottom, and ash bucket top is arranged to flow channels, and Jing coagulates And flue gas afterwards is processed into sack cleaner;Ash bucket be arranged at coalescence area lower section, with electricity-bag dust collector other Ash bucket is concordant.
The waveform dividing plate arranged in coalescence area is horizontally disposed;It is not communicated between two pieces of adjacent waveform dividing plates, and ripple Deformationization is corresponding, defines the passage of flow section change;Waveform divider height is 10cm;Two pieces of adjacent waveforms every Spacing between plate takes 30cm.In FIG, branch's air-flow excessively stream flow velocity VD>VC>VB, A is that E is at branch's air-flow velocity change Air-flow intersection of branch, is also all turbulent flow coalescence mainly occurs caused by velocity gradient region.
In the porch in coalescence area, vertically arranged one group of nozzle, by being sufficiently mixed coalescence accelerator and water with liquid pump, mix Coalescence accelerator solution after conjunction accesses nozzle Jing after atomization by guiding tube, sprays into coalescence area, forms mist cloud.Coalescence promotes It is 1.5% that agent accounts for the mass percent of water;Coalescence accelerator solution flow accounts for flue gas flow percent by volume for 0.1%.Jing pocket types Flue gas after dust removal process, the flue gas that discharge standard is reached after air-introduced machine is by purification is discharged from aiutage.
Being processed using the device makes ultra-fine flue dust coalescence into the particle of greater particle size, and is taken off by sack cleaner Remove.The coalescence case provided using the present invention, carries out reinforcing coalescence, is followed by sack cleaner, the total efficiency of dust collection of whole technique More than 99.98%, dust contained flue gas concentration of emission is less than 20mg/Nm3, PM2.5Clearance improves 60%.

Claims (4)

1. one kind crosses formula speed change ultra-fine grain coalescence case, it is characterised in that:Whole coalescence case in box, be adapted to mount to electricity- Between bag dust collector;Described coalescence case is made up of air inlet, gas outlet, coalescence area and ash bucket;Described air inlet is removed for electricity Passage after dirt device, flue gas is by electric cleaner;Coalescence area is provided with waveform dividing plate, and dust granules are in waveform dividing plate Between passage in carry out reinforcing coalescence;Described gas outlet is located at coalescence area bottom, and ash bucket top is arranged to flow channels, Flue gas after Jing coalescences is processed into sack cleaner;Described ash bucket is arranged at coalescence area lower section, removes with electricity-bag Other ash buckets of dirt device are concordant.
2. coalescence case as claimed in claim 1, the waveform dividing plate arranged in coalescence area is horizontally disposed;Two blocks of adjacent waves Shape dividing plate waveform changes corresponding setting, defines the passage of flow section change;Phase between two pieces of adjacent waveform dividing plates It is logical, there is the section that crosses, cross a section interval setting;Waveform divider height is 10 ~ 15cm;Between two pieces of adjacent waveform dividing plates Spacing takes 30 ~ 40cm.
3. coalescence case as claimed in claim 1, in the porch in coalescence area, vertically arranged one group of nozzle, nozzle passes through pipeline It is connected with air pump, the adsorbents such as activated carbon can be carried Jing nozzles by air-flow and spray into coalescence area.
4. coalescence case as claimed in claim 1, in the porch in coalescence area, vertically arranged one group of nozzle, will be coagulated by liquid pump is matched somebody with somebody And accelerator and water are sufficiently mixed, mixed coalescence accelerator solution accesses nozzle Jing after atomization by guiding tube, sprays into solidifying And area, form mist cloud.
CN201611227191.0A 2016-12-27 2016-12-27 Joining type variable speed ultrafine particle coagulation tank Withdrawn CN106621681A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106621682A (en) * 2016-12-27 2017-05-10 盐城工学院 Corrugated variable-speed ultrafine particle coagulation chamber

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4919696A (en) * 1987-10-30 1990-04-24 Mitsubishi Jukogyo Kabushiki Kaisha Supercooling type mist eliminator apparatus
CN202087189U (en) * 2011-05-05 2011-12-28 上海冶金矿山机械厂 Dust collection performance increased corrugated board mounting structure
CN203315937U (en) * 2013-05-09 2013-12-04 南昌航空大学 Cyclone venturi spray desulfurization dust collector
CN204380469U (en) * 2015-01-04 2015-06-10 中电投远达环保工程有限公司 Fume dust remover
CN104801420A (en) * 2015-05-13 2015-07-29 东南大学 Device and method for increasing grain size of PM2.5 (particulate matter2.5) through turbulent flow and chemical agglomeration coupling
CN106621682A (en) * 2016-12-27 2017-05-10 盐城工学院 Corrugated variable-speed ultrafine particle coagulation chamber
CN206810000U (en) * 2016-12-27 2017-12-29 盐城工学院 One kind crosses formula speed change ultra-fine grain coalescence case

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4919696A (en) * 1987-10-30 1990-04-24 Mitsubishi Jukogyo Kabushiki Kaisha Supercooling type mist eliminator apparatus
CN202087189U (en) * 2011-05-05 2011-12-28 上海冶金矿山机械厂 Dust collection performance increased corrugated board mounting structure
CN203315937U (en) * 2013-05-09 2013-12-04 南昌航空大学 Cyclone venturi spray desulfurization dust collector
CN204380469U (en) * 2015-01-04 2015-06-10 中电投远达环保工程有限公司 Fume dust remover
CN104801420A (en) * 2015-05-13 2015-07-29 东南大学 Device and method for increasing grain size of PM2.5 (particulate matter2.5) through turbulent flow and chemical agglomeration coupling
CN106621682A (en) * 2016-12-27 2017-05-10 盐城工学院 Corrugated variable-speed ultrafine particle coagulation chamber
CN206810000U (en) * 2016-12-27 2017-12-29 盐城工学院 One kind crosses formula speed change ultra-fine grain coalescence case

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106621682A (en) * 2016-12-27 2017-05-10 盐城工学院 Corrugated variable-speed ultrafine particle coagulation chamber

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Application publication date: 20170510