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 PDFInfo
- 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
- Authority
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000009833 condensation Methods 0.000 claims abstract description 6
- 230000005494 condensation Effects 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 239000000945 filler Substances 0.000 claims description 30
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 68
- 239000003546 flue gas Substances 0.000 abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 239000003595 mist Substances 0.000 description 5
- 235000019504 cigarettes Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/002—Separation 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
Landscapes
- 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
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)
- 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.
- 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).
- 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.
- 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.
- 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. 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。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710517932.7A CN107376578A (en) | 2017-06-29 | 2017-06-29 | The demister and method of a kind of flue tail gas |
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CN201710517932.7A CN107376578A (en) | 2017-06-29 | 2017-06-29 | The demister and method of a kind of flue tail gas |
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Publication Number | Publication Date |
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CN107376578A true CN107376578A (en) | 2017-11-24 |
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CN201710517932.7A Pending CN107376578A (en) | 2017-06-29 | 2017-06-29 | The demister and method of a kind of flue tail gas |
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Cited By (1)
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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