CN106861378A - A kind of wet desulfurization flue gas processing method - Google Patents
A kind of wet desulfurization flue gas processing method Download PDFInfo
- Publication number
- CN106861378A CN106861378A CN201710230898.5A CN201710230898A CN106861378A CN 106861378 A CN106861378 A CN 106861378A CN 201710230898 A CN201710230898 A CN 201710230898A CN 106861378 A CN106861378 A CN 106861378A
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- Prior art keywords
- heat exchanger
- type heat
- desulfurization
- plate type
- flue gas
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 55
- 230000023556 desulfurization Effects 0.000 title claims abstract description 52
- 239000003546 flue gas Substances 0.000 title claims abstract description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000003672 processing method Methods 0.000 title claims abstract description 12
- 239000003517 fume Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 239000008246 gaseous mixture Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 12
- 239000007791 liquid phase Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000012071 phase Substances 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 4
- 235000019504 cigarettes Nutrition 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 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
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/263—Drying gases or vapours by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of wet desulfurization flue gas processing method, it is characterised in that comprise the steps：Wet desulfurization flue gas enter in desulfurizing tower after desulfurization, in the desulfurization fume that the top discharge temperature of desulfurizing tower is 58~70 DEG C, pressure is 1~5kPa；The desalted water that desulfurization fume and temperature are 20~60 is sent into plate type heat exchanger from the hot side entrance of plate type heat exchanger 2 together, air enters in plate type heat exchanger from cold side input port, exchanged heat；Obtain temperature be 50~60 DEG C, the desulfurization fume that relative humidity is 20~60% and hot-air and condensed water that temperature is 30~80 DEG C；Desulfurization fume and desalted water after cooling are discharged from the hot side outlet of the plate type heat exchanger together, into gas-liquid separator in carry out gas-liquid separation；The hot-air that gas phase after separation is discharged with the cold side outlet port from the plate type heat exchanger mixes, and obtains the gaseous mixture that temperature is 60~68 DEG C, absolute humidity is 2~10%, and the gaseous mixture sends into smoke stack emission.
Description
Technical field
The present invention relates to chemical process, a kind of wet desulfurization flue gas processing method is referred specifically to.
Background technology
Occurs " white cigarette " phenomenon when industrial heating furnace, boiler of power plant etc. are to airborne release flue gas, mainly due to heat smoke
Met with air, flue-gas temperature reduction, its interior contained humidity reaches supersaturation, condensation of moisture forms white haze.
Abatement " white cigarette " has positive role to improving fume emission outward appearance, improving public's environmental protection acceptance.With air
The raising of pollutant emission standard, substantial amounts of industrial furnace and boiler of power plant flue gas are de- using wet method by being discharged after desulphurization denitration
The flue gas of sulphur carries saturated steam and a large amount of water smokes, more there is the technical need of abatement " white cigarette ".
Wet desulphurization accounts for there is now the 84% of the flue gas desulfurization device of operation.Humidity of flue gas after wet desulphurization compared with
Height, cigarette temperature is relatively low, and the flue gas after desulfurization enters when in surrounding air, and vapor is in hypersaturated state in flue gas, and part water steams
Air cooling condenses mist, so as to " white cigarette " phenomenon occur.
CN201610214181.7 is disclosed《A kind of wet-method desulfurized fume condensation takes off white equipment and process except haze》,
It includes flue gas dehumidifier, Water spray tower, desulfurizing tower and flue gas deep freezer, and the flue gas of pretreatment first passes through flue gas dehumidifier and incites somebody to action
The flue gas that enter chimney discharge is exchanged heat, and flue gas is entered in Water spray tower by air-introduced machine, through the cigarette after spray process
Gas enters desulfurizing tower, and the flue gas after desulfurization process carries out different disposal according to environment temperature difference, when ambient temperatures are low, makes ring
Border air is exchanged heat with the flue gas after desulfurization under air blower effect in flue gas deep freezer, and the air after preheating is used to supply
Production system.
This application first exchanges heat desulfurization fume with surrounding air, and flue-gas temperature reduction occurs condensation vapor, reduces flue gas
Absolute humidity, then again with desulfurization before after high-temperature flue gas heat exchange by smoke stack emission, reduce the relative humidity of flue gas.But should
The heat exchange air themperature that technology is used directly is emitted after raising, energy waste, high energy consumption；And the technology needs outfit many
Individual heat exchanger and air blower, floor space are big, and equipment investment is high.
The content of the invention
The technical problems to be solved by the invention be directed to prior art present situation provide one kind can eliminate white cigarette discharge, ring
Border close friend and the good wet desulfurization flue gas processing method of energy conservation and consumption reduction effects.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：The wet desulfurization flue gas processing method, it is special
Levy is to comprise the steps：
Wet desulfurization flue gas enter in desulfurizing tower after desulfurization, are 58~70 DEG C, pressure in the top discharge temperature of desulfurizing tower
It is the desulfurization fume of 1~5kPa；
The desalted water that desulfurization fume and temperature are 20~60 DEG C is sent into from the hot side entrance of plate type heat exchanger together board-like
Heat exchanger is interior, air enters in plate type heat exchanger from cold side input port, is exchanged heat；Temperature is obtained for 50~60 DEG C, relative humidity
Desulfurization fume and temperature for 20~60% are 30~80 DEG C of hot-air and condensed water；
The ratio of the desalted water and desulfurization fume is 0.05~0.12L desalted waters/1Nm3Desulfurization fume；
The air is 0.5~1 with the volume ratio of the desulfurization fume；
Desulfurization fume and desalted water after cooling are discharged from the hot side outlet of the plate type heat exchanger together, into gas-liquid point
Gas-liquid separation is carried out in device；The hot-air that gas phase after separation is discharged with the cold side outlet port from the plate type heat exchanger mixes,
The gaseous mixture that temperature is 60~68 DEG C, absolute humidity is 2~10% is obtained, the gaseous mixture sends into smoke stack emission；
The liquid phase that the gas-liquid separator separates go out sends into the washings in supplement desulfurizing tower in the desulfurizing tower.
The hot side entrance of the plate type heat exchanger is located at the top of the plate type heat exchanger, the hot side entrance and the plate
Surge chamber is provided between the housing of formula heat exchange, is provided with the surge chamber to the spray thrower to the hot side entrance, desalted water leads to
The spray thrower is crossed to spray into.The program can be such that desalted water and desulfurization fume uniformly mixes, and lift clean result.
To improve heat exchange efficiency, the air can be sent into the plate type heat exchanger by blower fan.
Compared with prior art, wet desulfurization flue gas processing method provided by the present invention, desulfurization fume and environment is empty
Gas exchanges heat, and condenses out large quantity of moisture, while a large amount of heat energy released during using hydrogenesis are come heating environment dry air；Condensation is de-
Flue gas after water is admixed with the hot-air after heating, improves flue-gas temperature and steam percentage in flue gas simultaneously is greatly reduced, and makes mixing
The absolute humidity and relative humidity of flue gas are greatly reduced afterwards, reduce the dew-point temperature of emptying flue gas, make flue gas with colourless nothing
Taste state is discharged, and environment-friendly, energy conservation and consumption reduction effects are notable.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in figure 1, the device that the wet desulfurization flue gas processing method is used includes：
Desulfurizing tower 1, is conventional desulfurization tower, and the high-temperature flue gas that upstream is sent are washed, and removes most of sulphur therein；
Its entrance connection high-temperature flue gas pipeline 9.
Plate type heat exchanger 2, for being condensed to desulfurization fume, isolates steam therein；Desulfurizing tower 1 can be overlayed
Top (Fig. 1 is schematic diagram, not shown in figure)；In the present embodiment, the heat exchanger fin of plate type heat exchanger is prepared using board with enamel panel layer material,
Can also be prepared using other anti-corrosion materials as needed；The hot side entrance of plate type heat exchanger 2 is above, plate type heat exchanger 2
Hot side entrance and the housing of the plate-type heat-exchange 2 above it between be provided with surge chamber 21, is provided with to entering to hot side in surge chamber 21
The spray thrower 8 of mouth, the entrance connection desalted water pipeline 81 of spray thrower 8, desalted water pipeline 81 connects out-of-bounds desalination water source.It is board-like to change
The hot side entrance of hot device 2 connects the exhanst gas outlet 11 at the top of desulfurizing tower 1 by surge chamber.
The cold side input port connection air duct 6 of plate type heat exchanger 2, air duct 6 is provided with air blower 7, for board-like
Feeding air in heat exchanger 2；The cold side outlet port of plate type heat exchanger 2 connects the first pipeline 51 by second pipe 52.
Gas-liquid separator 4, the logistics for being sent out to plate type heat exchanger hot side outlet carries out gas-liquid separation, the present embodiment
In gas-liquid separator 4 be water bag.The liquid-phase outlet of gas-liquid separator 4 connects the condensing hot air furnace interface 13 of desulfurizing tower 1；Gas-liquid
The gaseous phase outlet of separator 4 connects chimney 3 by the first pipeline 51.
Wet desulfurization flue gas processing method comprises the steps：
Wet desulfurization flue gas enter in desulfurizing tower 1 after desulfurization, the top discharge temperature of desulfurizing tower 1 be 65 DEG C, pressure be
The desulfurization fume of 3kPa；
Desulfurization fume from top enter plate type heat exchanger 2 surge chamber 21 in, with the temperature sprayed into from spray thrower be 20~
After 60 DEG C of desalted water is tentatively well mixed in surge chamber, from hot side entrance feeding plate type heat exchanger 2；Air is via air blast
Blowing for machine 7 enters in plate type heat exchanger 2 from cold side input port.
The ratio for controlling desalted water and desulfurization fume is 0.05~0.12L desalted waters/1Nm3Desulfurization fume；Air and desulfurization
The volume ratio of flue gas is 0.5~1.
In plate type heat exchanger, flue gas is cooled down on the heat exchange plate of plate type heat exchanger, and condensate is attached on plate, cigarette
The sulfate carried secretly in gas is dissolved in the water, and reduces the Sulfates crystallization in discharge flue gas, reduces the haze in flue gas
Content；While desulfurization fume is desalted water washing, exchanged heat with air；Obtain hot-air and cigarette that temperature is 50~60 DEG C
Aqueous mixtures.
Cigarette aqueous mixtures are discharged from the hot side outlet of plate type heat exchanger, into gas-liquid separator in carry out gas-liquid separation；
Be 50~60 DEG C to temperature, the desulfurization fume and condensed water that relative humidity is 35~45%.The gas phase isolated is changed with from board-like
The hot-air mixing of the cold side outlet port discharge of hot device 2, obtain temperature be 60~68 DEG C, absolute humidity be 2~10% without color contamination
Gas is closed, feeding chimney 3 is discharged；Washings in the liquid phase feeding desulfurizing tower 1 that gas-liquid separator separates go out in supplement desulfurizing tower.
Claims (3)
1. a kind of wet desulfurization flue gas processing method, it is characterised in that comprise the steps：
After wet desulfurization flue gas enter desulfurizing tower (1) interior desulfurization, it is 58~70 DEG C, presses in the top discharge temperature of desulfurizing tower (1)
Power is the desulfurization fume of 1~5kPa；
The desalted water that desulfurization fume and temperature are 20~60 DEG C is sent into board-like changing from the hot side entrance of plate type heat exchanger (2) together
Hot device (2) is interior, air enters in plate type heat exchanger (2) from cold side input port, is exchanged heat；Obtain temperature for 50~60 DEG C, it is relative
Humidity is 20~60% desulfurization fume and temperature is 30~80 DEG C hot-air and condensed water；
The ratio of the desalted water and desulfurization fume is 0.05~0.12L desalted waters/1Nm3Desulfurization fume；
The air is 0.5~1 with the volume ratio of the desulfurization fume；
Desulfurization fume and desalted water after cooling are discharged from the hot side outlet of the plate type heat exchanger 2 together, into gas-liquid separation
Gas-liquid separation is carried out in device (4)；Gas phase after separation is mixed with the hot-air that the cold side outlet port from the plate type heat exchanger (2) is discharged
Close, obtain the gaseous mixture that temperature is 60~68 DEG C, absolute humidity is 2~10%, the gaseous mixture sends into chimney (3) discharge；
The liquid phase that the gas-liquid separator separates go out sends into the washings in supplement desulfurizing tower in the desulfurizing tower (1).
2. wet desulfurization flue gas processing method according to claim 1, it is characterised in that the heat of the plate type heat exchanger (2)
Side entrance is located at the top of the plate type heat exchanger, is provided with slow between the hot side entrance and the housing of the plate-type heat-exchange (2)
Rush and be provided with room (21), the surge chamber (21) to the spray thrower (8) to the hot side entrance, desalted water passes through the spray thrower
(8) spray into.
3. wet desulfurization flue gas processing method according to claim 1 and 2, it is characterised in that the air passes through blower fan
(7) send into the plate type heat exchanger (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710230898.5A CN106861378A (en) | 2017-04-11 | 2017-04-11 | A kind of wet desulfurization flue gas processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710230898.5A CN106861378A (en) | 2017-04-11 | 2017-04-11 | A kind of wet desulfurization flue gas processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106861378A true CN106861378A (en) | 2017-06-20 |
Family
ID=59162945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710230898.5A Withdrawn CN106861378A (en) | 2017-04-11 | 2017-04-11 | A kind of wet desulfurization flue gas processing method |
Country Status (1)
| Country | Link |
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| CN (1) | CN106861378A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028922A (en) * | 2018-06-11 | 2018-12-18 | 济南阜丰宏发机械有限公司 | Exhaust gas white cigarette cleaning equipment and its technique during a kind of Starch Production dry materials |
| CN110174134A (en) * | 2019-04-29 | 2019-08-27 | 浙江浙能嘉华发电有限公司 | A kind of anti-white cigarette intelligent detection method of wet desulphurization chimney |
| US20210220772A1 (en) * | 2019-10-29 | 2021-07-22 | Huaneng Clean Energy Research Institute | Flue gas low-temperature adsorption denitrification method |
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| KR100949037B1 (en) * | 2009-10-12 | 2010-03-24 | (주)명성환경 | Eliminating apparatus of effluent gas comes from an organic waste |
| CN102000490A (en) * | 2010-11-25 | 2011-04-06 | 东南大学 | Control method for aerosol in flue gas desulfurization by utilizing ammonia method and master desulfurizing tower |
| CN105289212A (en) * | 2015-11-06 | 2016-02-03 | 佛山赛因迪环保科技有限公司 | Smoke abatement water-saving method and device of desulfurization exhaust |
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| CN105983307A (en) * | 2016-06-30 | 2016-10-05 | 吴剑华 | Alkali-water desulphurization dust removal technology |
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| KR100949037B1 (en) * | 2009-10-12 | 2010-03-24 | (주)명성환경 | Eliminating apparatus of effluent gas comes from an organic waste |
| CN102000490A (en) * | 2010-11-25 | 2011-04-06 | 东南大学 | Control method for aerosol in flue gas desulfurization by utilizing ammonia method and master desulfurizing tower |
| CN105289212A (en) * | 2015-11-06 | 2016-02-03 | 佛山赛因迪环保科技有限公司 | Smoke abatement water-saving method and device of desulfurization exhaust |
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| CN105983307A (en) * | 2016-06-30 | 2016-10-05 | 吴剑华 | Alkali-water desulphurization dust removal technology |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028922A (en) * | 2018-06-11 | 2018-12-18 | 济南阜丰宏发机械有限公司 | Exhaust gas white cigarette cleaning equipment and its technique during a kind of Starch Production dry materials |
| CN110174134A (en) * | 2019-04-29 | 2019-08-27 | 浙江浙能嘉华发电有限公司 | A kind of anti-white cigarette intelligent detection method of wet desulphurization chimney |
| CN110174134B (en) * | 2019-04-29 | 2021-04-02 | 浙江浙能嘉华发电有限公司 | White smoke prevention intelligent detection method for wet desulphurization chimney |
| US20210220772A1 (en) * | 2019-10-29 | 2021-07-22 | Huaneng Clean Energy Research Institute | Flue gas low-temperature adsorption denitrification method |
| US11925898B2 (en) * | 2019-10-29 | 2024-03-12 | Huaneng Clean Energy Research Institute | Flue gas low-temperature adsorption denitrification method |
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Application publication date: 20170620 |