CN107376578A - The demister and method of a kind of flue tail gas - Google Patents

The demister and method of a kind of flue tail gas Download PDF

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Publication number
CN107376578A
CN107376578A CN201710517932.7A CN201710517932A CN107376578A CN 107376578 A CN107376578 A CN 107376578A CN 201710517932 A CN201710517932 A CN 201710517932A CN 107376578 A CN107376578 A CN 107376578A
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CN
China
Prior art keywords
tail gas
demister
cold air
flue tail
blender
Prior art date
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.)
Pending
Application number
CN201710517932.7A
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Chinese (zh)
Inventor
王随林
张立申
李萍
李成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING DISTRICT HEATING GROUP Co Ltd
BEIJING WEIYE HEAT SUPPLY EQUIPMENT Co Ltd
Beijing University of Civil Engineering and Architecture
Original Assignee
BEIJING DISTRICT HEATING GROUP Co Ltd
BEIJING WEIYE HEAT SUPPLY EQUIPMENT Co Ltd
Beijing University of Civil Engineering and Architecture
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BEIJING DISTRICT HEATING GROUP Co Ltd, BEIJING WEIYE HEAT SUPPLY EQUIPMENT Co Ltd, Beijing University of Civil Engineering and Architecture filed Critical BEIJING DISTRICT HEATING GROUP Co Ltd
Priority to CN201710517932.7A priority Critical patent/CN107376578A/en
Publication of CN107376578A publication Critical patent/CN107376578A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The demister and method of a kind of flue tail gas, belong to flue tail gas processing technology field.The device includes cold air inlet, filter, blower fan, regulating valve, flue tail gas entrance, blender and demister, and sets temperature sensor on the connecting line between cold air inlet and blender and between demister and chimney;The inventive method is to be discharged into the problem of being also easy to produce white haze in the relatively low air of temperature for flue tail gas, flue tail gas and air are mixed according to a certain percentage and realize the processes such as cooling condensation, water vapour content in flue tail gas is reduced into local environment to accommodate below the threshold value of vapor, and the white haze problem in boiler exhaust gas smoke evacuation region is eliminated with the technical scheme compared with low energy consumption.In addition this method also achieves deep purifying and the depth dedusting of flue gas.

Description

The demister and method of a kind of flue tail gas
Technical field
The present invention relates to flue tail gas in the demister of flue tail gas and method, more particularly to combustion apparatus to discharge fume Mouth is also easy to produce the demisting technology of white haze.
Background technology
Contain substantial amounts of vapor in flue tail gas, if the temperature of cold air is relatively low in surrounding environment, work as flue tail gas When entering surrounding environment via chimney, vapor space will occur and condense and generate small droplet or small water droplet.It can be seen from distant place solidifying When fogging is dripped, tend to see a white cigarette area be present above chimney, contain fine solid impurity in white cigarette, have a strong impact on The air quality in city, and reduce the visibility of neighboring area.Need to be handled flue tail gas for this, avoid white cigarette mist Urban air quality is had undesirable effect.
In terms of demisting, a kind of current technology is that the defogging method of exhaust gases passes is formed using steel construction, such as CN201510182291 proposes wet desulfuration tower demister, and CN201510164839 proposes a kind of compound demisting of multi-channel type Device and its defogging method, another kind are to use electric demisting technology, if CN201520132704 and CN201510090819 is to utilize Caused electric field absorbs droplet between negative electrode and anode tube.These technologies are by the caused mist in fume treatment Drop removes, but their inapplicable caused white hazes after solving the problems, such as smoke evacuation, and this is due to that flue tail gas is not yet formed before discharge Droplet, only when flue tail gas is discharged into atmospheric environment from exhaust opening (exhanst gas outlet such as on chimney), white haze just occurs.
The content of the invention
Caused white haze problem when being discharged for boiler smoke tail gas, the present invention provide a kind of demisting dress of flue tail gas Put and method, on the one hand reduction flue tail gas pollutant emission, another aspect solve the problems, such as the white haze that chimney is emerged.
Technical scheme is as follows:
A kind of demister of flue tail gas, it is characterised in that:The device includes cold air inlet, flue tail gas entrance, mixed Clutch and demister;Cold air inlet and flue tail gas entrance are connected by pipeline with the entrance of described blender respectively; Cold air inlet on the connecting line of the blender with being sequentially provided with filter, cold air inlet temperature sensor and regulating valve;Institute State and contain filler module and dash module inside demister;Blender is connected by pipeline with the filler module in demister Connect, the filler module in demister is joined directly together with dash module, dash module be connected by connecting pipe with chimney and Mixed gas outlet temperature sensor is provided with connecting pipe;Discharge outlet is provided with the bottom of described demister.
Preferably, blower fan is provided with the pipeline that cold air inlet is connected with described blender.It is highly preferred that the blower fan Using frequency conversion fan.
Blender of the present invention is cyclone type blender, iris type blender or material filling type blender.
In above-mentioned technical proposal, described filler module is the metal packing by multilayer non-metallic fillers or multilayer corrosion-resistance " W " font structure, filter screen type structure or the Flapper type structure formed.
The defogging method of a kind of flue tail gas provided by the invention, it is characterised in that this method comprises the following steps:
1) cold air from cold air inlet flows through filter, cold air inlet temperature sensor, blower fan and regulating valve successively Afterwards, cold air is fully blended and cooled in blender with the flue tail gas from flue tail gas entrance;Come in from cold air inlet Cold air and the flow-rate ratio of the flue tail gas come in from flue tail gas entrance be adjusted by blower fan or valve;
2) contain substantial amounts of droplet in the gas after blending and cooling, demisting dress is flowed into from the mixed gas of blender outflow In putting, the mixed gas with droplet flows through filler module in demister, when being contacted with the filler in filler module Droplet surface is condensed, and the droplet of condensation is discharged from discharge outlet;
3) mixed gas flows through dash module from filler module, and dash module further removes the small mist in mixed gas Drop, is then flowed directly into chimney by pipeline;
4) the temperature t2 of the temperature t1 of cold air inlet temperature sensor measurement and mixed gas outlet temperature sensor measurement Between meet following relation:
0.0075(t1-t2)+5965.6(1/t1-1/t2)≤0.7
The present invention compared with prior art, has advantages below and high-lighting effect:1. make full use of existing in air Cold air, solves the problems, such as the white haze that chimney breast position is emerged;2. reducing flue tail gas pollutant emission, smoke-purifying is reached The purpose of tail-gas;3. the system small investment, operating cost are low, economical, reliable, the transformation of smoke evacuation system can be flexibly applied to.
Brief description of the drawings
Fig. 1 is the principle schematic diagram of the first embodiment of the demister system of flue tail gas provided by the invention.
Fig. 2 is the principle schematic diagram of second of embodiment of the demister system of flue tail gas provided by the invention.
Fig. 3 is that the filler module of the present invention uses the schematic diagram of Flapper type structure.
Fig. 4 is that the filler module of the present invention uses the schematic diagram of filter screen type structure.
Fig. 5 is the filler module of the present invention using the schematic diagram of " W " font structure.
In figure:1- cold air inlets;2- filters;3- cold air inlet temperature sensors;4- blower fans;5- regulating valves;6- flue gases Gas inlet;7- blenders;8- demisters;9- filler modules;10- dash modules;11- discharge outlet;12- mixed gas outlets Temperature sensor;13- chimneys.
Embodiment
The system and the course of work of the present invention are described further with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of demister of flue tail gas provided by the invention, the device includes cold air inlet 1, flue gas Gas inlet 6, blender 7 and demister 8;Cold air inlet 1 and flue tail gas entrance 6 pass through pipeline and described mixing respectively The entrance connection of device 7;Filter 2, cold air inlet temperature are sequentially provided with the connecting line of cold air inlet 1 and the blender 7 Spend sensor 3 and regulating valve 5;Mixer outlet is connected with the entrance of demister 8, and filler mould is contained in the inside of demister 8 Block 9 and dash module 10, discharge outlet 11 is provided with the bottom of described demister, and discharge outlet arranges the droplet condensed Walk;Described blender 7 is used for the mixing of flue tail gas and cold air, and blender 7 passes through the demisting in pipeline and demister 8 Module 9 is connected, and demisting module 9 is joined directly together with dash module 10 in described demister 8, the gear in demister 8 Water module 10 is connected with chimney 13 by pipeline and is furnished with mixed gas outlet temperature sensor 12 on connecting pipe, is used for Detect the temperature t2 of mixed gas.
Heretofore described blender 7 can be cyclone type blender, iris type blender or material filling type blender.It is described Filler module 9 be " W " font structure, the filter screen type knot being made up of the metal packing of multilayer non-metallic fillers or multilayer corrosion-resistance Structure or Flapper type structure, the mixed gas turbulization pulse pneumatic containing droplet in filler module, further realize mixing The blending of gas simultaneously tentatively removes part droplet, and multiple filling layers are arranged vertically, are easy to condensate to drain;Described dash module 10 It is dash plate profile structure, droplet or droplet can be separated from mixed gas and be drained by discharge outlet 11.
Another embodiment of Fig. 2 described devices, with Fig. 1 except that, in cold air inlet 1 and described blender 7 Blower fan 4 is additionally provided with the pipeline of connection, blower fan 4 is to determine frequency blower fan or frequency conversion fan.
Fig. 3, Fig. 4 and Fig. 5 represent filler module and use Flapper type structure, filter screen type structure and " W " font structure respectively Schematic diagram.
The defogging method of flue tail gas provided by the invention is as follows:
First, the cold air from cold air inlet 1 flows through cold filter 2, cold air inlet temperature sensor 3, blower fan 4 successively After regulating valve 5, cold air is fully blended and realized in blender 7 with the flue tail gas from flue tail gas entrance 6 Flue tail gas cools;Due to containing substantial amounts of vapor in flue tail gas 6, contain substantial amounts of mist in the gas after being sufficiently mixed Drop, the mixed gas flowed out from blender 7 are flowed into demister 8, and the mixed gas of droplet is carried successively in demister Filler module 9 and dash module 10 are flowed through, mist occurs when the mixed gas containing droplet contacts with the filler in filler module 9 Drip surface to condense, the droplet of condensation is discharged from discharge outlet 11;Then mixed gas is flowed into dash module 10 from filler module 9, Dash module 10 further removes the small droplet of mixed gas, and mixed gas is led to after being flowed out from the dash module 10 of demister 8 Cross pipeline to flow directly into chimney 13, mixed gas outlet temperature is arranged on the pipeline that demister 8 and chimney 13 connect Sensor 12, mixed gas outlet temperature sensor 12 are used for the temperature for detecting mixed gas;The cold sky of described cold air inlet 2 Gas comes from outside atmosphere;The flow-rate ratio of the cold air of described cold air inlet 1 and the flue tail gas of flue tail gas entrance 6 passes through tune Blower fan 4 or valve 5 on section cooled-air line determine, realize temperature t1 and gaseous mixture that cold air inlet temperature sensor 3 measures The temperature t2 that body outlet temperature sensor 12 measures should meet following relation:
0.0075(t1-t2)+5965.6(1/t1-1/t2)≤0.7
After the technical program, the part Water vapor condensation in flue gas gets off, and the content of vapor is reduced in flue gas The water vapour amount that local outdoor air can accommodate, small droplet or small water will not be produced when the flue gas after processing is discharged into air Drop, solve the problems, such as that chimney nearby produces white cigarette.In such scheme, vapor can be thin by what is still had in flue gas when condensing Micro- flue dust absorbs and a small amount of SO is retained as condensate is drained, while in flue gasXAlso the condensation of acid can occur, play compared with low temperature The lower deep purifying of degree and the purpose of dedusting.

Claims (6)

  1. A kind of 1. demister of flue tail gas, it is characterised in that:The device includes cold air inlet (1), flue tail gas entrance (6), blender (7) and demister (8);Cold air inlet (1) and flue tail gas entrance (6) are mixed by pipeline and described respectively The entrance connection of clutch (7);Be sequentially provided with the connecting line of cold air inlet (1) and the blender (7) filter (2), Cold air inlet temperature sensor (3) and regulating valve (5);Contain filler module (9) and dash module inside the demister (8) (10);Blender (7) is connected by pipeline with the filler module (9) in demister (8), the filler module in demister (9) it is joined directly together with dash module (10), dash module is connected with chimney (13) by pipeline and is furnished with connecting pipe Mixed gas outlet temperature sensor (12);Discharge outlet (11) is provided with the bottom of described demister.
  2. A kind of 2. demister of flue tail gas as claimed in claim 1, it is characterised in that:Cold air inlet (1) with it is described Blender (7) connection pipeline be provided with blower fan (4).
  3. A kind of 3. demister of flue tail gas as claimed in claim 2, it is characterised in that:The blower fan (4) uses frequency conversion Blower fan.
  4. A kind of 4. demister of flue tail gas as claimed in claim 1, it is characterised in that:Described blender (7) is rotation Wind formula blender, iris type blender or material filling type blender.
  5. A kind of 5. demister of flue tail gas as described in claim 1-4 any claims, it is characterised in that:Described Filler module (9) is W font structures, the filter screen type structure being made up of the metal packing of multilayer non-metallic fillers or multilayer corrosion-resistance Or Flapper type structure.
  6. 6. using a kind of defogging method of flue tail gas such as claim 1-5 any claim described devices, its feature exists Comprise the following steps in this method:
    1) cold air from cold air inlet (1) flows through filter (2), cold air inlet temperature sensor (3), blower fan (4) successively After regulating valve (5), cold air is fully blended and dropped in blender (7) with the flue tail gas from flue tail gas entrance (6) Temperature;The cold air come in from cold air inlet and the flow-rate ratio for the flue tail gas come in from flue tail gas entrance by blower fan (4) or Valve (5) is adjusted;
    2) contain substantial amounts of droplet in the gas after blending and cooling, demisting dress is flowed into from the mixed gas of blender (7) outflow Put in (8), the mixed gas with droplet flows through filler module (9) in demister (8), with filling out in filler module (9) Droplet surface occurs during material contact to condense, the droplet of condensation is discharged from discharge outlet (11);
    3) mixed gas flows through dash module (10) from filler module (9), and dash module (10) is further removed in mixed gas Small droplet, then flowed directly into by pipeline in chimney (13);
    4) the temperature t1 of cold air inlet temperature sensor (3) measurement and the temperature of mixed gas outlet temperature sensor (12) measurement Meet following relation between t2:
    0.0075(t1-t2)+5965.6(1/t1-1/t2)≤0.7。
CN201710517932.7A 2017-06-29 2017-06-29 The demister and method of a kind of flue tail gas Pending CN107376578A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109865404A (en) * 2017-12-02 2019-06-11 哈尔滨工大金涛科技股份有限公司 Slag steam dehumidifying of quenching disappears whitening method and device

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CN204485558U (en) * 2015-01-09 2015-07-22 上海安赐机械设备有限公司 A kind of demist cleaner realizing the minimum discharge of coal-burning power plant's wet desulphurization tail gas
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CN105964087A (en) * 2016-06-08 2016-09-28 孙中强 System and method for reducing PM2.5 generated by flue gas
CN106422684A (en) * 2016-11-28 2017-02-22 江苏亿金环保科技有限公司 Device for removing white smoke in flue gas
CN206001939U (en) * 2016-07-30 2017-03-08 山东蓝想环境科技股份有限公司 A kind of combination type fog dispersal water saving cooling tower
CN106669379A (en) * 2017-01-19 2017-05-17 上海华之邦科技股份有限公司 Boiler flue gas recirculation dehumidification device
CN207153390U (en) * 2017-06-29 2018-03-30 北京建筑大学 A kind of demister of flue tail gas

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101409192B1 (en) * 2013-02-25 2014-06-19 한국세라믹기술원 Dust collector for removing high temperature dust
JP2015014426A (en) * 2013-07-05 2015-01-22 株式会社タクマ White smoke prevention method and device of waste incineration facility
US20150321538A1 (en) * 2014-05-09 2015-11-12 Jun-Wei Su Fast cooling system in cars
CN104048306A (en) * 2014-07-07 2014-09-17 新疆中云智能科技有限公司 Energy-saving environment-friendly boiler tail gas exhaust tower
CN204485558U (en) * 2015-01-09 2015-07-22 上海安赐机械设备有限公司 A kind of demist cleaner realizing the minimum discharge of coal-burning power plant's wet desulphurization tail gas
CN105080245A (en) * 2015-08-21 2015-11-25 北京建筑大学 System and method for integrally recycling condensation heat energy of flue gas with dust and purifying flue gas
CN105964087A (en) * 2016-06-08 2016-09-28 孙中强 System and method for reducing PM2.5 generated by flue gas
CN206001939U (en) * 2016-07-30 2017-03-08 山东蓝想环境科技股份有限公司 A kind of combination type fog dispersal water saving cooling tower
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CN106669379A (en) * 2017-01-19 2017-05-17 上海华之邦科技股份有限公司 Boiler flue gas recirculation dehumidification device
CN207153390U (en) * 2017-06-29 2018-03-30 北京建筑大学 A kind of demister of flue tail gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109865404A (en) * 2017-12-02 2019-06-11 哈尔滨工大金涛科技股份有限公司 Slag steam dehumidifying of quenching disappears whitening method and device

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Application publication date: 20171124

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