CN107042061A - A kind of method and device that chimney white cigarette is eliminated applied to coal-burning power plant - Google Patents
A kind of method and device that chimney white cigarette is eliminated applied to coal-burning power plant Download PDFInfo
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- CN107042061A CN107042061A CN201611216800.2A CN201611216800A CN107042061A CN 107042061 A CN107042061 A CN 107042061A CN 201611216800 A CN201611216800 A CN 201611216800A CN 107042061 A CN107042061 A CN 107042061A
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
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- 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
- B01D53/005—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 heat treatment
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- 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
- B01D53/1493—Selection of liquid materials for use as absorbents
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- 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
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of method and device that chimney white cigarette is eliminated applied to coal-burning power plant, comprise the following steps, step S01：The temperature of saturation wet flue gas is exported by reducing desulfurizing tower, to reduce the water capacity of saturation wet flue gas；Step S02：The saturated flue gas of water capacity is reduced through step S01, by the flue demister of baffling channel-type, the aerosol particle and the small water droplet of liquid in saturated flue gas is removed；Step S03：The flue gas for removing aerosol particle and the small water droplet of liquid is heated by warming-up section heat exchanger, the temperature of humid air saturation curve is heated to above, so as to eliminate white cigarette phenomenon.A kind of device that chimney white cigarette is eliminated applied to coal-burning power plant, it can eliminate the white flue gas of coal-burning power plant's generation under low temperature, high humidity environment, the sulfur dioxide in flue gas can effectively be removed, remove smoke middle aerosol particle, improve efficiency of dust collection, reduce energy resource consumption.
Description
Technical field
The present invention relates to a kind of method and device that chimney white cigarette is eliminated applied to coal-burning power plant, belong to dust-removal and desulfurizing technology
Field.
Background technology
China is consumption of coal big country, and coal fire discharged sulfur dioxide and Dust Capacity is ranked the first in the world, and is thereby resulted in
Air pollution problems inherent becomes increasingly conspicuous, and administers the major issue that sulfur dioxide and dust emission are current China environmental protection work.
The proportion that the sulfur dioxide (SO2) emissions in thermal power plant account for whole SO2 emissions is at a relatively high, according to statistics coal-burned industrial boiler
SO2 emissions account for national SO2 emissions and reach 40% or so.Therefore, thermal power generation flue-gas dust-removing and desulfurization is control
The important measures of sulfur dioxide processed, dust pollution.But, there is efficiency of dust collection in the dust-removal and desulfurizing technology in current thermal power plant
Low, desulfurizing tower water consumption is high, the low problem of boiler efficiency.
The content of the invention
It is an object of the present invention to provide a kind of method and device that chimney white cigarette is eliminated applied to coal-burning power plant, it can
To eliminate the white flue gas that coal-burning power plant is produced under low temperature, high humidity environment, it can effectively remove the sulfur dioxide in flue gas, disappear
Except aerosol particle in flue gas.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：One kind is applied to coal-burning power plant and eliminates cigarette
The method of chimney white cigarette, comprises the following steps, step S01：The temperature of saturation wet flue gas is exported by reducing desulfurizing tower, it is full to reduce
With the water capacity of wet flue gas；Step S02：The saturated flue gas of water capacity is reduced through step S01, is removed by the flue of baffling channel-type
Day with fog, removes the aerosol particle and the small water droplet of liquid in saturated flue gas；Step S03：By warming-up section heat exchanger to except degassing
The flue gas of sol particle and the small water droplet of liquid is heated, and is heated to above the temperature of humid air saturation curve, so as to eliminate white
Cigarette phenomenon.
A kind of device that chimney white cigarette is eliminated applied to coal-burning power plant, including desulfurizing tower, desulfurizing tower and temperature descending section heat exchanger
Connection, temperature descending section heat exchanger is connected by fume pipe with warming-up section heat exchanger, between temperature descending section heat exchanger and warming-up section heat exchanger
Fume pipe on be provided with flue demister, warming-up section heat exchanger is connected with chimney；Also include generator, generator passes through steam
Pipe is connected with the steam inlet of warming-up section heat exchanger, and warming-up section heat exchanger is connected by pipeline with temperature descending section heat exchanger, temperature descending section
Heat exchanger is connected with absorber, and absorber is connected by return duct with generator, and solution pump is provided with return duct.
In the foregoing this device that chimney white cigarette is eliminated applied to coal-burning power plant, the exit of the chimney is provided with certainly
The temperature-detecting device and humidity detector of dynamic measurement.Warming-up section heat exchanger, temperature-detecting device and humidity detector are equal
It is connected with computer control system.The flue-gas temperature value detected is fed back to computer control system by temperature-detecting device；Together
The smoke moisture value detected is fed back to computer control system by reason humidity detector, according to the flue-gas temperature value of feedback and
Smoke moisture value, computer control system calculates flue gas warming-up section institute calorific requirement automatically, according to the flue gas warming-up section calculated
The flue gas of flue demister is passed through in institute's calorific requirement, computer control system control warming-up section heat exchanger heating so that the temperature of flue gas
Degree lifting eliminates the temperature of white cigarette to satisfaction.
To ensure the white cigarette for thoroughly eliminating chimney outlet, flue gas can be heated in warming-up section heat exchanger make state point
Temperature when line CD and humid air saturation curve minimum spacing are 3 DEG C to 10 DEG C, such as Fig. 2 humid air saturation plot institute
Show, A points are the state point of desulfurizing tower exit saturation wet flue gas in Fig. 2, B points are to reduce temperature and water capacity through step S01
Smoke behavior point, C points are the smoke behavior point after being heated up in warming-up section heat exchanger, and D points are the ambient condition of chimney outlet
Point.
At a certain temperature, the partial pressure of vapor is higher in humid air, and its absolute humidity is bigger.But, in a constant temperature
The partial pressure of the lower vapor of degree can not possibly exceed its corresponding saturation pressure, because when reaching saturation pressure, vapor starts to coagulate
Knot.Therefore, when vapor reaches saturation, humid air has absolute humidity maximum at this temperature, and humid air at this moment is referred to as satisfying
And air.Different temperatures, the line of saturated air water capacity is humid air saturation curve.
In the foregoing this device that chimney white cigarette is eliminated applied to coal-burning power plant, in addition to water leg, water leg and drop
The drain outlet connection of temperature section heat exchanger.Saturation wet flue gas through desulfurizing tower scrubbing CO_2 is cold in temperature descending section heat exchanger
But, the water that saturation wet flue gas is produced during cooling is collected by water leg, is used to by the collected water of water leg
Recycle, reduce the water consumption of power plant.
In the foregoing this device that chimney white cigarette is eliminated applied to coal-burning power plant, the generator is by delivery pipe with inhaling
Receive device connection.
In the foregoing this device that chimney white cigarette is eliminated applied to coal-burning power plant, the temperature descending section heat exchanger and warming-up section
Choke valve is provided with pipeline between heat exchanger.
Compared with prior art, method of the invention can be eliminated under low temperature, high humidity environment from coal-burning power plant's chimney row
The white flue gas gone out, can effectively remove the sulfur dioxide in flue gas, remove smoke in aerosol particle, improve dedusting effect
Rate.The device of the present invention makes saturation wet flue gas remove titanium dioxide through desulfurizing tower by the way that temperature descending section heat exchanger is connected with desulfurizing tower
After sulphur, the flue gas through desulfurization is cooled down by temperature descending section heat exchanger, and the water for cooling down out recycling is collected by water leg；And it is cold
The vapor that condensation goes out can be attached to fine dust surface, increase the volume and quality of dust granule, it is removed by flue
It is captured and removes during day with fog, and then efficiency of dust collection can be improved；Examined by the temperature-detecting device and humidity that are arranged on chimney breast
Device is surveyed, according to the temperature value and humidity value of detection, flue gas increasing extent of temperature is calculated, so as to be adjusted in time by computer control system
The increasing extent of temperature of flue gas in whole warming-up section heat exchanger, reduces the irrational consumption of the energy.
Brief description of the drawings
Fig. 1 is the structural representation of an embodiment of the present invention；
Fig. 2 is the humid air saturation plot of the present invention.
Reference：1- generators, 2- solution pumps, 3- choke valves, 4- steam pipes, 5- temperature descending section heat exchangers, 6- warming-up sections
Heat exchanger, 7- flue demisters, 8- pipelines, 9- desulfurizing towers, 10- temperature-detecting devices, 11- humidity detectors, 12- chimneys,
13- water legs, 14- absorbers, 15- return ducts, 16- fume pipes, 17- delivery pipes.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Embodiment
Embodiments of the invention 1：A kind of method that chimney white cigarette is eliminated applied to coal-burning power plant, comprises the following steps,
Step S01：The temperature of saturation wet flue gas is exported by reducing desulfurizing tower, to reduce the water capacity of saturation wet flue gas；
Step S02：The saturated flue gas of water capacity is reduced through step S01, by the flue demister of baffling channel-type, saturated flue gas is removed
In the small water droplet of aerosol particle and liquid；
Step S03：The flue gas for removing aerosol particle and the small water droplet of liquid is heated by warming-up section heat exchanger, plus
Heat arrives the temperature higher than humid air saturation curve, so as to eliminate white cigarette phenomenon.
Smoke behavior point B is down to from the smoke behavior point A in the exit of desulfurizing tower 9 by flue gas after temperature descending section heat exchanger, led to
Cross and smoke behavior point C is risen to after warming-up section heat exchanger, now flue gas is unsaturated flue gas, what unsaturated flue gas was reached by chimney
Ambient condition point D.The smoke behavior point C after the heating of warming-up section heat exchanger is set to meet smoke behavior point connection CD and humid air saturation
The minimum spacing of curve is 5 DEG C.
Embodiments of the invention 2：A kind of device that chimney white cigarette is eliminated applied to coal-burning power plant, including desulfurizing tower 9, desulfurization
Tower 9 is connected with temperature descending section heat exchanger 5, and temperature descending section heat exchanger 5 is connected by fume pipe 16 with warming-up section heat exchanger 6, and temperature descending section is changed
Flue demister 7 is provided with fume pipe 16 between hot device 5 and warming-up section heat exchanger 6, warming-up section heat exchanger 6 connects with chimney 12
It is logical；Also include generator 1, generator 1 is connected by steam pipe 4 with the steam inlet of warming-up section heat exchanger 6, warming-up section heat exchanger
6 are connected by pipeline 8 with temperature descending section heat exchanger 5, and temperature descending section heat exchanger 5 is connected with absorber 14, and absorber 14 passes through return duct
15 are connected with generator 1, and solution pump 2 is provided with return duct 15.The exit of chimney 12 is provided with the temperature inspection of automatic measurement
Survey device 10 and humidity detector 11.
Embodiments of the invention 3：A kind of device that chimney white cigarette is eliminated applied to coal-burning power plant, including desulfurizing tower 9, desulfurization
Tower 9 is connected with temperature descending section heat exchanger 5, and temperature descending section heat exchanger 5 is connected by fume pipe 16 with warming-up section heat exchanger 6, and temperature descending section is changed
Flue demister 7 is provided with fume pipe 16 between hot device 5 and warming-up section heat exchanger 6, warming-up section heat exchanger 6 connects with chimney 12
It is logical；Also include generator 1, generator 1 is connected by steam pipe 4 with the steam inlet of warming-up section heat exchanger 6, warming-up section heat exchanger
6 are connected by pipeline 8 with temperature descending section heat exchanger 5, and temperature descending section heat exchanger 5 is connected with absorber 14, and absorber 14 passes through return duct
15 are connected with generator 1, and solution pump 2 is provided with return duct 15.The exit of chimney 12 is provided with the temperature inspection of automatic measurement
Survey device 10 and humidity detector 11.
Further, in addition to water leg 13, water leg 13 is connected with the drain outlet of temperature descending section heat exchanger 5.
Further, generator 1 is connected by delivery pipe 17 with absorber 14.Temperature descending section heat exchanger 5 and warming-up section heat exchange
Choke valve 3 is provided with pipeline 8 between device 6.
The operation principle of the present invention：
Then saturation wet flue gas absorbs heat in temperature descending section heat exchanger 5 through the scrubbing CO_2 of desulfurizing tower 9 by heating agent,
Cooling down part water, reduces the water capacity of saturation wet flue gas, and the flue gas for reducing temperature and water capacity passes through flue demister 7,
Aerosol particle and the small water droplet of liquid are removed in flue demister 7, then through removing aerosol particle and the small water droplet of liquid
Flue gas is using heating agent heating in warming-up section heat exchanger 6, and increasing extent of temperature is according to temperature-detecting device 10 and humidity detector 11
The flue-gas temperature value and smoke moisture value in the exit of chimney 12 of detection is controlled, and the flue gas in warming-up section heat exchanger 6 is risen
Temperature eliminates the temperature of white cigarette to meeting.
The heating agent used in said process, is to be heated using vapor in generator 1 with certain density LiBr water
Solution, makes wherein to be evaporated as the water section of heating agent refrigerant, is then delivered to warming-up section heat exchanger 6 by steam pipe 4
Condensation turns into aqueous water, and the aqueous water of condensation is depressured through pipeline 8 by choke valve 3, aqueous water is changed into water vapour through decompression,
Then evaporated in temperature descending section heat exchanger 5, so as to absorb the heat of the saturation wet flue gas through scrubbing CO_2.The water of evaporation steams
Gas transports to absorber 14, and remaining LiBr concentrated solutions absorb in generating process is completed during absorber 14 is interior by generator 1, make
LiBr concentrated solutions are restored to the certain density LiBr aqueous solution needed for generator 1, and generator 1 is sent to by solution pump 2
It is middle to recycle.
Claims (6)
1. a kind of method that chimney white cigarette is eliminated applied to coal-burning power plant, it is characterised in that comprise the following steps,
Step S01：The temperature of saturation wet flue gas is exported by reducing desulfurizing tower, to reduce the water capacity of saturation wet flue gas；
Step S02：The saturated flue gas of water capacity is reduced through step S01, by the flue demister of baffling channel-type, saturation is removed
The small water droplet of aerosol particle and liquid in flue gas；
Step S03：The flue gas for removing aerosol particle and the small water droplet of liquid is heated by warming-up section heat exchanger, is heated to
Higher than the temperature of humid air saturation curve, so as to eliminate white cigarette phenomenon.
2. a kind of device for the method for being applied to coal-burning power plant's elimination white cigarette realized described in claim 1, it is characterised in that bag
Desulfurizing tower (9) is included, the desulfurizing tower (9) is connected with temperature descending section heat exchanger (5), and temperature descending section heat exchanger (5) passes through fume pipe (16)
It is connected with warming-up section heat exchanger (6), on the fume pipe (16) between the temperature descending section heat exchanger (5) and warming-up section heat exchanger (6)
Flue demister (7) is provided with, the warming-up section heat exchanger (6) connects with chimney (12)；
Also include generator (1), generator (1) is connected by steam pipe (4) with the steam inlet of warming-up section heat exchanger (6), rise
Temperature section heat exchanger (6) is connected by pipeline (8) with temperature descending section heat exchanger (5), the temperature descending section heat exchanger (5) and absorber (14)
Connection, absorber (14) is connected by return duct (15) with generator (1), and solution pump (2) is provided with the return duct (15).
3. a kind of device that chimney white cigarette is eliminated applied to coal-burning power plant according to claim 2, it is characterised in that described
The exit of chimney (12) is provided with the temperature-detecting device (10) and humidity detector (11) of automatic measurement.
4. a kind of device that chimney white cigarette is eliminated applied to coal-burning power plant according to claim 3, it is characterised in that also wrap
Water leg (13) is included, the water leg (13) is connected with the drain outlet of temperature descending section heat exchanger (5).
5. a kind of device that chimney white cigarette is eliminated applied to coal-burning power plant according to claim 4, it is characterised in that described
Generator (1) is connected by delivery pipe (17) with the absorber (14).
6. a kind of device that chimney white cigarette is eliminated applied to coal-burning power plant according to claim 2 or 5, it is characterised in that
Choke valve (3) is provided with pipeline (8) between the temperature descending section heat exchanger (5) and warming-up section heat exchanger (6).
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| CN201611216800.2A CN107042061A (en) | 2016-12-26 | 2016-12-26 | A kind of method and device that chimney white cigarette is eliminated applied to coal-burning power plant |
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| CN201611216800.2A CN107042061A (en) | 2016-12-26 | 2016-12-26 | A kind of method and device that chimney white cigarette is eliminated applied to coal-burning power plant |
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Cited By (9)
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| CN107559866A (en) * | 2017-10-31 | 2018-01-09 | 国电环境保护研究院 | A kind of cancellation element of wet plume |
| CN107899264A (en) * | 2017-11-29 | 2018-04-13 | 安徽未名科键环境有限公司 | A kind of dedusting demisting white-smoke-removing integrated apparatus |
| CN108194939A (en) * | 2018-01-24 | 2018-06-22 | 中国华电科工集团有限公司 | It is a kind of to be used for the exhaust heat stepped device and method using with eliminating white smoke of thermal power plant |
| CN108317503A (en) * | 2018-02-08 | 2018-07-24 | 西安交通大学 | A kind of coal-fired power station boiler smoke discharging residual heat and water reclamation system and operation method |
| CN108469034A (en) * | 2018-04-23 | 2018-08-31 | 西安热工研究院有限公司 | A kind of integral system and method carrying out flue gas deep treatment using drying brown coal lack of gas |
| CN108939837A (en) * | 2018-06-27 | 2018-12-07 | 东南大学 | A kind of gas dewatering ash disposal discharge eliminating white smoke method and apparatus and method |
| CN109248536A (en) * | 2018-09-26 | 2019-01-22 | 昊姆（上海）节能科技有限公司 | Disappear white system and the whitening method that disappears of phase transformation absorption condensation and peak regulation reheating |
| CN110270190A (en) * | 2018-07-19 | 2019-09-24 | 孙厚杰 | A kind of flue gas wet absorption tower neat stress takes off white technique |
| WO2021128105A1 (en) * | 2019-12-25 | 2021-07-01 | 深圳市能源环保有限公司 | Gas boiler flue gas depluming treatment system for municipal sludge drying and incineration treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108194939A (en) * | 2018-01-24 | 2018-06-22 | 中国华电科工集团有限公司 | It is a kind of to be used for the exhaust heat stepped device and method using with eliminating white smoke of thermal power plant |
| CN108194939B (en) * | 2018-01-24 | 2024-04-23 | 中国华电科工集团有限公司 | Device and method for waste heat cascade utilization and white smoke elimination of thermal power plant |
| CN108317503A (en) * | 2018-02-08 | 2018-07-24 | 西安交通大学 | A kind of coal-fired power station boiler smoke discharging residual heat and water reclamation system and operation method |
| CN108317503B (en) * | 2018-02-08 | 2019-07-02 | 西安交通大学 | A kind of coal-fired power station boiler smoke discharging residual heat and water reclamation system and operation method |
| CN108469034A (en) * | 2018-04-23 | 2018-08-31 | 西安热工研究院有限公司 | A kind of integral system and method carrying out flue gas deep treatment using drying brown coal lack of gas |
| CN108469034B (en) * | 2018-04-23 | 2024-03-12 | 西安热工研究院有限公司 | Integrated system and method for deep treatment of flue gas by utilizing dry brown coal exhaust gas |
| CN108939837A (en) * | 2018-06-27 | 2018-12-07 | 东南大学 | A kind of gas dewatering ash disposal discharge eliminating white smoke method and apparatus and method |
| CN110270190A (en) * | 2018-07-19 | 2019-09-24 | 孙厚杰 | A kind of flue gas wet absorption tower neat stress takes off white technique |
| CN109248536A (en) * | 2018-09-26 | 2019-01-22 | 昊姆（上海）节能科技有限公司 | Disappear white system and the whitening method that disappears of phase transformation absorption condensation and peak regulation reheating |
| WO2021128105A1 (en) * | 2019-12-25 | 2021-07-01 | 深圳市能源环保有限公司 | Gas boiler flue gas depluming treatment system for municipal sludge drying and incineration treatment |
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