CN108980881A - A kind of smoke processing system and method - Google Patents
A kind of smoke processing system and method Download PDFInfo
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- CN108980881A CN108980881A CN201810946918.3A CN201810946918A CN108980881A CN 108980881 A CN108980881 A CN 108980881A CN 201810946918 A CN201810946918 A CN 201810946918A CN 108980881 A CN108980881 A CN 108980881A
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- solution
- heat exchanger
- flue gas
- storage tank
- liquid storage
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- 239000000779 smoke Substances 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 71
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000003546 flue gas Substances 0.000 claims abstract description 62
- 238000006243 chemical reaction Methods 0.000 claims abstract description 54
- 238000001816 cooling Methods 0.000 claims abstract description 53
- 239000007921 spray Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002918 waste heat Substances 0.000 claims abstract description 34
- 230000000712 assembly Effects 0.000 claims abstract description 24
- 238000000429 assembly Methods 0.000 claims abstract description 24
- 230000008929 regeneration Effects 0.000 claims abstract description 17
- 238000011069 regeneration method Methods 0.000 claims abstract description 17
- 239000013589 supplement Substances 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 238000003672 processing method Methods 0.000 claims description 9
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 8
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229940059936 lithium bromide Drugs 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 238000007791 dehumidification Methods 0.000 claims description 3
- 208000011580 syndromic disease Diseases 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- 229910052791 calcium Inorganic materials 0.000 claims 1
- 239000011575 calcium Substances 0.000 claims 1
- 238000005660 chlorination reaction Methods 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 abstract description 10
- 239000003517 fume Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000243 solution Substances 0.000 description 177
- 239000012530 fluid Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The present invention provides a kind of smoke processing system and methods, the system includes the chimney to circulate for flue gas to be processed, the liquid storage tank for being contained with reaction solution, with solution regeneration unit, liquid storage tank is set to the bottom of the chimney, is provided with spray assemblies above the liquid storage tank；Solution regeneration unit includes Recuperative heat exchanger, solution processor and waste-heat recoverer；The weak solution entrance of Recuperative heat exchanger is connected with the taphole of the liquid storage tank, and weak solution outlet is connected with the solution inlet of the solution processor；The concentrated solution entrance of the Recuperative heat exchanger is connected with the taphole of the solution processor, and concentrated solution outlet is connected with the solution liquid return hole of the liquid storage tank；The steam inlet of the waste-heat recoverer is connected with the steam (vapor) outlet of the solution processor, and liquid outlet is connected with cooling tower water supplement port.In this way, the smoke processing system realizes flue gas dehumidifying, the white cigarette phenomenon that smoke evacuation generates is avoided, ensure that fume treatment efficiency and effect.
Description
Technical field
The present invention relates to boiler smoke processing technology fields, and in particular to a kind of smoke processing system.The invention further relates to
A kind of processing method based on the smoke processing system.
Background technique
Flue gas is because temperature reduces during throat is discharged into atmosphere, and part vapourous water and pollutant can occur in flue gas
Condensation, forms misty steam in throat, misty steam can occur because of the reasons such as sky background color and skylight photograph, viewing angle
The slight change of color is formed " coloured plume ", usually the colors such as white, canescence or blue.
Currently, China's coal fired generator set desulfurization system generallys use Limestone-gypsum Wet Flue Gas Desulfurization Process technique, it is de- in wet process
In the smoke processing system of sulphur, flue gas and the desulfurization aqueous solution of higher temperature are come into full contact with, and are reached saturated with moisture state, can be made cigarette
Temperature degree is reduced to 45-55 DEG C, these low temperature saturation wet flue gas directly enters atmospheric environment through chimney, condenses into small liquid to the cold
Drop, to generate " white plume ", i.e. white cigarette.
The white cigarette generated in technique is unfavorable for flue gas diffusion, is easily formed secondary pollution, and make to surrounding resident life
At puzzlement；Meanwhile it is 0.1302kg/m3 (flue gas), 90 DEG C of saturation wet flue gas that 60 DEG C of saturation wet flue gas, which contains water vapour amount,
It is 0.4235kg/m3 (flue gas) containing water vapour amount, the average evaporation latent heat enthalpy of water vapour is about 2500kJ/kg, therefore is saturated
Wet flue gas contains a large amount of latent heat, and direct emission will cause the waste of latent heat in an atmosphere, be unfavorable for energy-saving and emission-reduction.
Summary of the invention
The purpose of the present invention is to solve at least one above-mentioned problem, which is by the following technical programs
It realizes.
The present invention provides a kind of smoke processing system, comprising: for flue gas to be processed circulation chimney (100), for
Handle chimney (100), dehumidifying tower, cooling heat exchanger (500) and the solution regeneration unit of flue gas circulation；
The dehumidifying tower includes tower body, spray assemblies (102), liquid storage tank (101), the flue gas flow equalizing for being contained with reaction solution
And demister；
The solution inlet of the cooling heat exchanger (500) is connected with the taphole of the liquid storage tank (101), solution
Outlet is connected with the spray assemblies (102) in the chimney (100)；
The solution regeneration unit includes Recuperative heat exchanger (200), solution processor (300) and waste-heat recoverer (400)；
The weak solution entrance of the Recuperative heat exchanger (200) is connected with the taphole of the liquid storage tank (101), weak solution outlet
It is connected with the solution inlet of the solution processor (300)；The concentrated solution entrance of the Recuperative heat exchanger (200) with it is described molten
The taphole of liquid processor (300) is connected, and concentrated solution outlet is connected with the solution liquid return hole of the liquid storage tank (101)
It is logical；It is provided with heat exchange pipeline in the solution processor (300), the entrance of the heat exchange pipeline is connected with hot steam source
Logical, pipe outlet is connected with condensate tank；The steam inlet of the waste-heat recoverer (400) and the solution processor
(300) steam (vapor) outlet is connected, and liquid outlet is connected with cooling tower water supplement port.
Further, spray is provided on the connecting pipeline between the cooling heat exchanger (500) and the liquid storage tank (101)
It pumps (600), the pumping direction of the spray pump (600) is from the liquid storage tank (101) to the side of the cooling heat exchanger (500)
To.
Further, it is provided on the connecting pipeline between the waste-heat recoverer (400) and the solution processor (300)
Solution pump (700), the pumping direction of the solution pump (700) are from the waste-heat recoverer (400) to the cooling heat exchanger
(500) direction.
Further, the cooling heat exchanger (500) be double pipe heat exchanger, plate heat exchanger, spiral heat exchanger or
Heat-pipe heat exchanger；And/or the Recuperative heat exchanger (200) is double pipe heat exchanger, plate heat exchanger, spiral plate type heat exchange
Device or heat-pipe heat exchanger.
Further, the flue gas flow equalizing of the dehumidifying tower entrance is airflow guiding device.
Further, the solution includes lithium chloride solution, lithium-bromide solution or calcium chloride solution.
A kind of flue gas processing method, comprising the following steps:
S1: reaction solution is delivered to cooling heat exchanger (500), and solution is cooled in cooling heat exchanger (500) and removes
The spray assemblies (102) on chimney (100) top are delivered to after wet temp；
S2: solution through spray assemblies (102) be atomized to presetting granularity range drop, drop falls downward and with rising
Flue gas carries out caloic exchange, and the concentration of solution is diluted by the moisture by absorbing in flue gas, and the temperature of solution is due to the moisture of absorption
It increases, solution is back to liquid storage tank (101) again, forms solution spraying moisture absorption circulation loop；
S3: being delivered to Recuperative heat exchanger (200) for reaction solution, be heated in Recuperative heat exchanger (200), and temperature is promoted
After be transported to waste-heat recoverer (400), by heating steam further heat after, solution evaporates a part of water vapour and produces
The pyrosol of raw concentration；
S4: being delivered to Recuperative heat exchanger (200) for the concentrated solution of high temperature, defeated after being cooled down in Recuperative heat exchanger (200)
It send to the liquid storage tank of chimney (100) (101), forms solution regeneration cycle.
Further, the concentration of the reaction solution sprayed in step S1 is 0%~40%, and temperature is 0~50 DEG C, drop grain
Degree is 0.2mm~5mm, and flow velocity of the flue gas in dehumidification region is 0.5~15m/s.
Further, in step s3, reaction solution enters backheat heat exchange in the water vapour that waste-heat recoverer (400) is evaporated
Device (200) is condensed into water in Recuperative heat exchanger (200) and is delivered to cooling tower.
Further, in step s3, steam temperature caused by waste-heat recoverer (400) is 50~200 DEG C, and cooling is changed
The inlet temperature of the cooling medium of hot device (500) is 0~50 DEG C, and the temperature of Recuperative heat exchanger (200) temperature end and low-temperature end is 0
~200 DEG C.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural block diagram of specific embodiment of smoke processing system provided by the present invention；
Fig. 2 is a kind of flow chart of specific embodiment of flue gas processing method provided by the present invention.
Description of symbols:
100- chimney 101- liquid storage tank 102- spray assemblies
200- Recuperative heat exchanger
300- solution processor
400- waste-heat recoverer
500- cooling heat exchanger
600- spray pump
700- solution pump
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
A kind of smoke processing system of the invention is changed for the chimney (100) of flue gas to be processed circulation, dehumidifying tower, cooling
Hot device (500) and solution regeneration unit；
The dehumidifying tower includes tower body, spray assemblies (102), liquid storage tank (101), the flue gas flow equalizing for being contained with reaction solution
And demister.Dehumidifying tower effect be exactly the water capacity for reducing flue gas, i.e., using solution include lithium chloride solution, lithium-bromide solution or
Calcium chloride solution absorbs the moisture in flue gas.Dehumidifying tower includes material filling type structure, spray empty tower structure.The cigarette of dehumidifying tower entrance
Gas, which flows, improves the entirety of flue gas caloic exchange so that flue gas is in uniformly to flow up in dehumidifying tower for airflow guiding device
Effect.
In the transformation of built chimney, the whole design of newly-built chimney, dehumidifying tower can use chimney lining cylinder conduct
Tower body constitutes dehumidifying tower, cigarette by chimney lining cylinder, spray assemblies, liquid storage tank, flue gas flow equalizing and demister (not shown)
Gas flows and demister is arranged in chimney lining cylinder body bottom space；In the structure of this dehumidifying tower, the liquid storage tank
(101) it is set to the bottom of the chimney (100) liner cylinder, the inside setting of liner cylinder above the liquid storage tank (101)
There are spray assemblies (102).
In grassroot project, the dehumidifying tower can be independently of chimney outside, be an independent dehumidifying tower.
The solution inlet of the cooling heat exchanger (500) is connected with the taphole of the liquid storage tank (101), solution
Outlet is connected with the spray assemblies (102) in the chimney (100)；Company between the cooling heat exchanger and the liquid storage tank
Siphunculus road is provided with spray pump, and the pumping direction of the spray pump is from the liquid storage tank to the side of the cooling heat exchanger
To.The cooling heat exchanger is double pipe heat exchanger, plate heat exchanger, spiral heat exchanger or heat-pipe heat exchanger.
The solution regeneration unit includes Recuperative heat exchanger, solution processor and waste-heat recoverer；The effect of regeneration unit
There are three: first is that being concentrated weak solution for concentrated solution, recovery moisture absorbing；Second is that produced water vapour can be used as heat source, use
In UTILIZATION OF VESIDUAL HEAT IN；Third is that having recycled condensed water.
The weak solution entrance of the Recuperative heat exchanger is connected with the taphole of the liquid storage tank, weak solution outlet with
The solution inlet of the solution processor is connected；The concentrated solution entrance of the Recuperative heat exchanger is molten with the solution processor
Liquid outlet is connected, and concentrated solution outlet is connected with the solution liquid return hole of the liquid storage tank；
Heat exchange pipeline is provided in the solution processor, the entrance of the heat exchange pipeline is connected with hot steam source
Logical, pipe outlet is connected with condensate tank；The effect of solution processor is exactly to heat weak solution, evaporates moisture,
Structure is equivalent to the reboiler of distillation technique, or is equivalent to the generator of Absorption Refrigerator, belongs to heat exchanger structure.
The steam inlet of the waste-heat recoverer is connected with the steam (vapor) outlet of the solution processor, liquid outlet with it is cold
But tower water supplement port is connected.It is provided with solution pump on connecting pipeline between the waste-heat recoverer and the solution processor,
The pumping direction of the solution pump is from the waste-heat recoverer to the direction of the cooling heat exchanger.The Recuperative heat exchanger is
Double pipe heat exchanger, plate heat exchanger, spiral heat exchanger or heat-pipe heat exchanger.
During the work time, the reaction solution in liquid storage tank is divided into two branches arranged side by side, anti-in one of branch
Solution is answered to be delivered to cooling heat exchanger by spray pump, reaction solution and cooling medium carry out heat exchange in cooling heat exchanger, instead
The temperature of solution is answered to be minimized, to reduce the water vapour saturation partial pressure of reaction solution, reaction solution returns after cooling down
Return and chimney and be delivered to spray assemblies, be atomized in spray assemblies as drop, drop from top to bottom flow during with to
The flue gas of upper flowing carries out caloic exchange and completes the cyclic process of hygroscopic solution, water vapour to reduce the humidity and temperature of flue gas
The latent heat of release and the sensible heat of flue gas are absorbed by reaction solution, and the concentration of reaction solution reduces, and temperature increases, high temperature low concentration
Solution returns to liquid storage tank.
Another branch routing spray pump that reaction solution in liquid storage tank is divided into is delivered to Recuperative heat exchanger, at this point, one
Point weak solution stays in Recuperative heat exchanger, and another part weak solution enters in solution processor, in solution processor, weak solution
It is heated through high-temperature steam, the part water vapour evaporation in solution simultaneously enters waste-heat recoverer through steam (vapor) outlet, and remaining reaction is molten
Liquid concentration increases, and temperature improves, and resulting high concentration pyrosol is delivered to Recuperative heat exchanger by solution pump, changes in backheat
The hot device high concentration pyrosol exchanges heat with remaining weak solution, so that weak solution temperature gets a promotion, concentrated solution temperature
It is lowered, mixed reaction solution is finally delivered to liquid storage tank, completes the regeneration cycle of reaction solution.
The steam entered in waste-heat recoverer through steam (vapor) outlet is condensed into water through cooling medium cooling, discharges its latent heat, with
That realizes fume afterheat is extracted utilization.
In this way, the smoke processing system realizes flue gas dehumidifying, the white cigarette phenomenon that smoke evacuation generates is avoided, meanwhile, it realizes
The extraction of fume afterheat, avoids the waste of flue gas heat；Also, the smoke processing system can concentration to reaction solution into
Row circulation is adjusted, and to guarantee that reaction solution is in always in more appropriate concentration range, ensure that fume treatment efficiency and effect
Fruit.
Referring to FIG. 1, Fig. 1 is a kind of structural block diagram of specific embodiment of smoke processing system provided by the present invention.
In a specific embodiment, smoke processing system provided by the invention includes circulating for flue gas to be processed
Chimney 100, the liquid storage tank 101 and solution regeneration unit for being contained with reaction solution, the liquid storage tank 101 are set to the chimney
100 bottom is provided with spray assemblies 102 above the liquid storage tank 101；Wherein, the solution regeneration unit includes that backheat is changed
Hot device 200, solution processor 300 and waste-heat recoverer 400；The weak solution entrance of the Recuperative heat exchanger 200 and the reservoir
The taphole in pond 101 is connected, and weak solution outlet is connected with the solution inlet of the solution processor 300；Described time
The concentrated solution entrance of heat exchanger 200 is connected with the taphole of the solution processor 300, concentrated solution outlet with it is described
The solution liquid return hole of liquid storage tank 101 is connected；Heat exchange pipeline is provided in the solution processor 300, the heat exchange pipeline
Entrance is connected with hot steam source, and pipe outlet is connected with condensate tank；The steam of the waste-heat recoverer 400 enters
Mouth is connected with the steam (vapor) outlet of the solution processor 300, and liquid outlet is connected with cooling tower water supplement port, to extract
For providing heat demand to outside Thermal Power Station's system boundary or in Thermal Power Station's system boundary after to the heat of flue gas.
The reaction system further includes cooling heat exchanger 500, the solution inlet and the liquid storage tank of the cooling heat exchanger 500
101 taphole is connected, and taphole is connected with the spray assemblies 102 in the chimney 100.In this way, by should
Cooling heat exchanger 500 can reduce the temperature of the pyroreaction solution in liquid storage tank 101, to guarantee what spray assemblies 102 sprayed
The heat exchanging process of reaction solution and flue gas is smooth.
Connecting pipeline in order to improve the circulation power of solution, between the cooling heat exchanger 500 and the liquid storage tank 101
On be provided with spray pump 600, the pumping direction of the spray pump 600 is from the liquid storage tank 101 to the cooling heat exchanger 500
Direction.Likewise, being provided with solution on connecting pipeline between the waste-heat recoverer 400 and the solution processor 300
Pump 700, the pumping direction of the solution pump 700 are from the waste-heat recoverer 400 to the direction of the cooling heat exchanger 500.
Specifically, the cooling heat exchanger 500 is double pipe heat exchanger, plate heat exchanger, spiral heat exchanger or heat
Pipe heat exchanger；And/or the Recuperative heat exchanger 200 be double pipe heat exchanger, plate heat exchanger, spiral heat exchanger or
Heat-pipe heat exchanger.
During the work time, the reaction solution in liquid storage tank 101 is divided into two branches arranged side by side, in one of branch
Reaction solution by spray pump 600 be delivered to cooling heat exchanger 500, reaction solution and cooling medium in cooling heat exchanger 500 into
The temperature of row heat exchange, reaction solution is minimized, to reduce the water vapour saturation partial pressure of reaction solution, reaction solution
Returned after cooling down and chimney 100 and be delivered to spray assemblies 102, be atomized in spray assemblies 102 as drop, drop by up to
Caloic is carried out with the flue gas flowed up during lower flowing to exchange, and to reduce the humidity and temperature of flue gas, it is molten to complete moisture absorption
The cyclic process of liquid, the latent heat of water vapour release and the sensible heat of flue gas are absorbed by reaction solution, and the concentration of reaction solution reduces, temperature
Degree increases, and the solution of high temperature low concentration returns to liquid storage tank 101.
Another branch routing spray pump 600 that reaction solution in liquid storage tank 101 is divided into is delivered to Recuperative heat exchanger 200,
At this point, a part of weak solution stays in Recuperative heat exchanger 200, another part weak solution enters in solution processor 300, in solution
In processor 300, weak solution is heated through high-temperature steam, and the part water vapour evaporation in solution simultaneously enters waste heat time through steam (vapor) outlet
Device 400 is received, remaining reaction solution concentration increases, and temperature improves, and resulting high concentration pyrosol is defeated by solution pump 700
It send to Recuperative heat exchanger 200, exchanges heat with remaining weak solution in the Recuperative heat exchanger 200 high concentration pyrosol, so that
Weak solution temperature gets a promotion, and concentrated solution temperature is lowered, and mixed reaction solution is finally delivered to liquid storage tank 101, completes
The regeneration cycle of reaction solution.
The steam entered in waste-heat recoverer 400 through steam (vapor) outlet is condensed into water through cooling medium cooling, discharges its latent heat,
Utilization is extracted with realize fume afterheat.
In this way, the smoke processing system realizes flue gas dehumidifying, the white cigarette phenomenon that smoke evacuation generates is avoided, meanwhile, it realizes
The extraction of fume afterheat, avoids the waste of flue gas heat；Also, the smoke processing system can concentration to reaction solution into
Row circulation is adjusted, and to guarantee that reaction solution is in always in more appropriate concentration range, ensure that fume treatment efficiency and effect
Fruit.
In addition to above-mentioned smoke processing system, the present invention also provides a kind of fume treatment sides based on the smoke processing system
Method, as shown in Fig. 2, method includes the following steps:
S1: reaction solution is delivered to cooling heat exchanger 500, solution is cooled in cooling heat exchanger 500 except damp-warm syndrome
The spray assemblies 102 on 100 top of chimney are delivered to after degree；
S2: solution is atomized through spray assemblies 102 to the drop of presetting granularity range, drop falls downward and the cigarette with rising
Gas carries out caloic exchange, and the concentration of solution is diluted by the moisture by absorbing in flue gas, and the temperature of solution rises because of the moisture of absorption
Height, solution are back to liquid storage tank 101 again, form solution spraying moisture absorption circulation loop；
S3: being delivered to Recuperative heat exchanger 200 for reaction solution, be heated in Recuperative heat exchanger 200, quilt after temperature is promoted
It is delivered to waste-heat recoverer 400, after heating steam further heats, solution evaporates a part of water vapour and generates concentration
Pyrosol；
S4: the concentrated solution of high temperature is delivered to Recuperative heat exchanger 200, is delivered to after being cooled down in Recuperative heat exchanger 200
The liquid storage tank 101 of chimney 100 forms solution regeneration cycle.
Further, in step s3, reaction solution enters backheat heat exchange in the water vapour that waste-heat recoverer 400 is evaporated
Device 200 is condensed into water in Recuperative heat exchanger 200 and is delivered to cooling tower.
Specifically, above-mentioned reaction solution can for one of lithium chloride solution, lithium-bromide solution or calcium chloride solution or
At least two mixed solution；The concentration of the reaction solution sprayed in step S1 is 0%~40%, and temperature is 0~50 DEG C, liquid
Drop granularity is 0.2mm~5.0mm, and flow velocity of the flue gas in dehumidification region is 0.5~15m/s.
Further, in step s3, steam temperature caused by waste-heat recoverer 400 is 50~200 DEG C, and cooling is changed
The inlet temperature of the cooling medium of hot device 500 is 0~50 DEG C, Recuperative heat exchanger 200 as pyrosol and cryogenic fluid it
Between heat exchange, reduce solution processor heat demand, improve solution processor efficiency.Heat transfer is by high temperature fluid medium
It is transmitted to cryogen medium, an import of the pyrosol of Recuperative heat exchanger 200 and one outlet are all referred to as temperature end,
Equally, an import of cryogenic fluid and one outlet are referred to as low-temperature end.By the fluid temperature difference model of temperature end or low-temperature end
It encloses and is set as 0~200 DEG C, the fluid temperature difference range of temperature end and low-temperature end can also be all set as 0~200 DEG C.
In the flue gas processing method, dehumidifying tower is installed in the bottom of chimney 100, and reaction solution is in 100 bottom of chimney
Liquid storage tank 101 in storage, two pipelines are delivered to by spray pump 600, reaction solution is delivered to cooling by one of pipeline
Heat exchanger 500, reaction solution are delivered to the spray on 100 top of chimney after being cooled in cooling heat exchanger 500 except wet temp
Component 102, reaction solution through spray assemblies 102 atomization be suitable particle size range drop, drop falls downward and with rising
Flue gas carry out caloic exchange, the concentration of reaction solution is diluted by the moisture by absorbing in flue gas, and the temperature of solution is because of absorption
Moisture and increase, solution is back to liquid storage tank 101 again, forms solution spraying moisture absorption circulation loop.
The solution of liquid storage tank 101 is conveyed by spray pump 600 along another pipeline to Recuperative heat exchanger 200, is exchanged heat in backheat
It is heated in device 200, temperature is transported to solution processor 300 after being promoted, and further heats by heating steam, solution evaporation
Out a part of water vapour and the solution of the high temperature that generates concentration, the concentrated solution of high temperature are delivered to Recuperative heat exchanger by solution pump 700
200, it is delivered to the liquid storage tank 101 of chimney 100 after being cooled down in Recuperative heat exchanger 200, forms solution regeneration cycle.
The water vapour that reaction solution is evaporated in solution processor 300 enters waste-heat recoverer 400, in waste-heat recoverer
It is condensed into water in 400, is transported to the moisturizing of cooling water, gives water recycling, while water recovery heat release is for heating heat supply
Return water, so as to form the recovery of latent heat of flue gas, the full heat for constituting flue gas with the sensible heat of the absorption of cooling heat exchanger 500 is returned
Receipts system.
In this way, the flue gas processing method realizes flue gas dehumidifying, the white cigarette phenomenon that smoke evacuation generates is avoided, meanwhile, it realizes
The extraction of fume afterheat, avoids the waste of flue gas heat；Also, the smoke processing system can concentration to reaction solution into
Row circulation is adjusted, and to guarantee that reaction solution is in always in more appropriate concentration range, ensure that fume treatment efficiency and effect
Fruit.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention.Should all it cover in protection of the invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of smoke processing system characterized by comprising
Chimney (100), dehumidifying tower, cooling heat exchanger (500) and solution regeneration unit for flue gas to be processed circulation；
The dehumidifying tower includes tower body, spray assemblies (102), the liquid storage tank (101) for being contained with reaction solution, flue gas flow equalizing and removes
Day with fog；
The solution inlet of the cooling heat exchanger (500) is connected with the taphole of the liquid storage tank (101), taphole
It is connected with the spray assemblies (102) in the chimney (100)；
The solution regeneration unit includes Recuperative heat exchanger (200), solution processor (300) and waste-heat recoverer (400)；It is described
The weak solution entrance of Recuperative heat exchanger (200) is connected with the taphole of the liquid storage tank (101), weak solution outlet and institute
The solution inlet for stating solution processor (300) is connected；At the concentrated solution entrance and the solution of the Recuperative heat exchanger (200)
The taphole of reason device (300) is connected, and concentrated solution outlet is connected with the solution liquid return hole of the liquid storage tank (101)；Institute
It states in solution processor (300) and is provided with heat exchange pipeline, the entrance of the heat exchange pipeline is connected with hot steam source, pipe
Road outlet is connected with condensate tank；The steaming of the steam inlet of the waste-heat recoverer (400) and the solution processor (300)
Vapor outlet is connected, and liquid outlet is connected with cooling tower water supplement port.
2. smoke processing system according to claim 1, which is characterized in that the cooling heat exchanger (500) and the storage
It is provided on connecting pipeline between liquid pool (101) spray pump (600), the pumping direction of the spray pump (600) is described in
Direction of the liquid storage tank (101) to the cooling heat exchanger (500).
3. smoke processing system according to claim 2, which is characterized in that the waste-heat recoverer (400) with it is described molten
It is provided on connecting pipeline between liquid processor (300) solution pump (700), the pumping direction of the solution pump (700) is certainly
Direction of the waste-heat recoverer (400) to the cooling heat exchanger (500).
4. smoke processing system according to claim 1, which is characterized in that the cooling heat exchanger (500) is bushing type
Heat exchanger, plate heat exchanger, spiral heat exchanger or heat-pipe heat exchanger；And/or
The Recuperative heat exchanger (200) is double pipe heat exchanger, plate heat exchanger, spiral heat exchanger or heat pipe type heat exchanger
Device.
5. system according to claim 1, which is characterized in that the flue gas flow equalizing of dehumidifying tower entrance is airflow guiding device.
6. system according to claim 1, which is characterized in that solution includes lithium chloride solution, lithium-bromide solution or chlorination
Calcium solution.
7. a kind of flue gas processing method, which comprises the following steps:
S1: reaction solution is delivered to cooling heat exchanger (500), and solution is cooled in cooling heat exchanger (500) except damp-warm syndrome
The spray assemblies (102) on chimney (100) top are delivered to after degree；
S2: solution is atomized through spray assemblies (102) to the drop of presetting granularity range, drop falls downward and the flue gas with rising
Caloic exchange is carried out, the concentration of solution is diluted by the moisture by absorbing in flue gas, and the temperature of solution is increased because of the moisture of absorption,
Solution is back to liquid storage tank (101) again, forms solution spraying moisture absorption circulation loop；
S3: being delivered to Recuperative heat exchanger (200) for reaction solution, be heated in Recuperative heat exchanger (200), quilt after temperature is promoted
Waste-heat recoverer (400) are delivered to, after heating steam further heats, solution evaporates a part of water vapour and generates dense
The pyrosol of contracting；
S4: the concentrated solution of high temperature is delivered to Recuperative heat exchanger (200), is delivered to after being cooled down in Recuperative heat exchanger (200)
The liquid storage tank (101) of chimney (100) forms solution regeneration cycle.
8. flue gas processing method according to claim 7, which is characterized in that the reaction solution sprayed in step S1 it is dense
Degree be 0%~40%, temperature be 0~50 DEG C, liquid droplet size be 0.2mm~5mm, flue gas dehumidification region flow velocity be 0.5~
15m/s。
9. flue gas processing method according to claim 7, which is characterized in that in step s3, reaction solution is returned in waste heat
It receives the water vapour that device (400) are evaporated and enters Recuperative heat exchanger (200), be condensed into water in Recuperative heat exchanger (200) and convey
To cooling tower.
10. the flue gas processing method according to claim 7 or 9, which is characterized in that
In step s3, steam temperature caused by waste-heat recoverer (400) is 50~200 DEG C, cooling heat exchanger (500)
The inlet temperature of cooling medium is 0~50 DEG C, and the temperature difference of Recuperative heat exchanger (200) temperature end and/or low-temperature end is 0~200
℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946918.3A CN108980881A (en) | 2018-08-20 | 2018-08-20 | A kind of smoke processing system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946918.3A CN108980881A (en) | 2018-08-20 | 2018-08-20 | A kind of smoke processing system and method |
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| CN108980881A true CN108980881A (en) | 2018-12-11 |
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| CN201810946918.3A Pending CN108980881A (en) | 2018-08-20 | 2018-08-20 | A kind of smoke processing system and method |
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| CN109821340A (en) * | 2019-02-21 | 2019-05-31 | 中国华电科工集团有限公司 | A kind of double regenerated smoke processing systems |
| CN110529170A (en) * | 2019-08-30 | 2019-12-03 | 中国矿业大学 | Mine thermal environment dehumidifying regenerative system and method |
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