CN109442449A - A kind of spray treatment device of flue gas - Google Patents
A kind of spray treatment device of flue gas Download PDFInfo
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- CN109442449A CN109442449A CN201811457496.XA CN201811457496A CN109442449A CN 109442449 A CN109442449 A CN 109442449A CN 201811457496 A CN201811457496 A CN 201811457496A CN 109442449 A CN109442449 A CN 109442449A
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- heat exchanger
- heat
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- 239000007921 spray Substances 0.000 title claims abstract description 122
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000003546 flue gas Substances 0.000 title claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 151
- 238000010521 absorption reaction Methods 0.000 claims abstract description 134
- 238000010438 heat treatment Methods 0.000 claims abstract description 68
- 239000003517 fume Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 63
- 239000007789 gas Substances 0.000 claims description 29
- 239000000779 smoke Substances 0.000 claims description 21
- 230000001172 regenerating effect Effects 0.000 claims description 20
- 238000000605 extraction Methods 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 13
- 238000005496 tempering Methods 0.000 claims description 13
- 239000000498 cooling water Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 8
- 230000002441 reversible effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000002386 leaching Methods 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 claims 2
- -1 absorption plant Chemical compound 0.000 claims 1
- 239000000112 cooling gas Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 6
- 230000007704 transition Effects 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 114
- 238000001816 cooling Methods 0.000 description 32
- 239000010410 layer Substances 0.000 description 13
- 230000003009 desulfurizing effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 229920006395 saturated elastomer Polymers 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 238000004064 recycling Methods 0.000 description 7
- 239000003595 mist Substances 0.000 description 6
- 230000036961 partial effect Effects 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000007701 flash-distillation Methods 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000002633 protecting effect Effects 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 238000009938 salting Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 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
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- MXWHMTNPTTVWDM-NXOFHUPFSA-N mitoguazone Chemical compound NC(N)=N\N=C(/C)\C=N\N=C(N)N MXWHMTNPTTVWDM-NXOFHUPFSA-N 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 239000002351 wastewater Substances 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
- F23J15/006—Layout of treatment plant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- B01D53/1406—Multiple stage 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
- B01D53/14—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
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/50—Intercepting solids by cleaning fluids (washers or scrubbers)
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of spray treatment devices of flue gas.Reservoir unit is arranged in the device in absorption plant, inner cavity is divided into the first fume treatment area and the second fume treatment area using it, flue gas enters the concentrated solution counter current contacting with absorption plant top spray from the bottom of absorption plant, it is thinning that the concentrated solution in the second fume treatment area absorbs moisture in flue gas, the latent heat discharged in moisture phase transition process is precipitated, heats flue gas and concentrated solution to 55 DEG C -65 DEG C；Concentrated solution after heating draws to enter in First Heat Exchanger by reservoir unit to exchange heat with heat transferring medium (such as hot net water), heat transferring medium can be warmed 3-10 DEG C, concentrated solution is cooled to substantially uniform later into the first fume treatment area with solution inlet port temperature at the top of the second fume treatment area, continue to absorb moisture in flue gas, it is exchanged heat for the first time using step, the quality that heat is changed can be effectively promoted, depth recycles and the sensible heat of former flue gas and the latent heat of neat stress water vapour is utilized.
Description
Technical field
The invention belongs to environmental technology fields, and in particular to a kind of spray treatment device of flue gas.
Background technique
It is at present active response " Shanghai City coal-burning power plant gypsum rain and the test of coloured plume with China's expanding economy
Technical requirements (tentative) ", Zhejiang " Emission standards of air pollutants for coal-fired " (solicit meaning original text), Tianjin is " about further
Reinforce notice of the key industrys atmosphere pollution deep treatment such as city's thermoelectricity, steel in relation to work " and Tangshan, Zhang Jia
Mouthful, coloured plume specification is eliminated on the ground such as Handan.The technology path of various Mist heat recoverings is developed, common technology road
Line is to arrange flue gas condenser, spray column after desulfurizing tower or increase slurries cooler on serum recycle slurry pipe to make
Moisture is precipitated in the cooling of desulfurizing tower exiting flue gas, recycles neat stress of the MGGH system after former fume afterheat thermal dehydration.
Above-mentioned flue gas condensing or flue gas condensing regeneration techniques route, can not deep exploitation original flue gas sensible heat and neat stress
A large amount of latent heat of middle water vapour.Meanwhile it is latent need to take away flue gas condensing in order to be dehydrated flue gas cool-down with extraneous refrigerant for above-mentioned technology
Heat, later again with former obvious heat of smoke heating neat stress to promote degree of unsaturation and climbing ability, this mode causes pole to the energy
Big waste.Flue gas condensing discharges latent heat simultaneously, and takes away this part latent heat and need a large amount of cooling circulating water, which is mesh
Preceding every kind of technology path requires the problem of facing, especially for the area of regulation desulfurizing tower outlet smoke temperature and water capacity, no
But winter needs to condense or even summer is also required to flue gas condensing, and cooling tower is often oepration at full load when power plant's summer, can not
Effective cold source is provided, if newly-built cooling tower, needs to increase several ten million investments, while the moisture for evaporating cooling tower gains flue gas
In waste water, do not have water-saving result.If newly-built induced cooling tower, construction cost is high, unbearable to power plant.
Summary of the invention
Therefore, existing the technical problem to be solved by the present invention is to the technology path of existing Mist heat recovering can not depth benefit
With a large amount of latent heat of water vapour in the sensible heat and neat stress of former flue gas, while the energy and water resource waste, cost of investment are big, eliminate
Coloured plume only has the defect for investing not income, to propose a kind of spray treatment device of flue gas.
For this purpose, the technical solution that the application takes is,
A kind of spray treatment device of flue gas, dust-extraction unit, desulfurizer and absorption plant including being sequentially communicated setting,
Further include,
Reservoir unit is set in the absorption plant, and its inner cavity is divided into the first fume treatment area and the second flue gas
Treatment region, flue gas are suitable for entering second fume treatment area from first fume treatment area by the reservoir unit；
First Heat Exchanger, liquid feeding end are connected to the reservoir unit, and outlet end is close to the reservoir unit and described the
One fume treatment area connection, so that the solution in the reservoir unit enters heat exchange in the First Heat Exchanger, and will be after heat exchange
Solution be sent into first fume treatment area and smoke contacts；
Refrigerating plant, the liquid feeding end of the refrigerating plant are connected to the lower part of the absorption plant, the refrigerating plant
Outlet end is connected to second fume treatment area, so that the liquid after heating enters described the after the refrigerating plant is cooling
Two fume treatment areas.
Further, further include water storage device, be connected to the lower part of the absorption plant, it, will be described in non-heating season
Water in water storage device is sent into the absorption plant circulated sprinkling for carrying out flue gas；Heating season, will be in the absorption plant
Water is stored in the water storage device；
Device for storing liquid is connected to the lower part of the absorption plant, in non-heating season, by the absorption in the absorption plant
Liquid is stored in the device for storing liquid；Absorbing liquid in the device for storing liquid is sent into the absorption plant by heating season；With/
Or,
The outlet end of the refrigerating plant is connected to the First Heat Exchanger, by recirculated cooling water and comes from the reservoir
The liquid of unit exchanges heat in the First Heat Exchanger.
It further, further include regenerative system, the regenerative system includes,
Dilute solution inlet is arranged in flash tank, middle part, and steam (vapor) outlet is arranged in top, and lower part is arranged concentrated solution and exports；
6th heat exchanger, the lower part of the absorption plant, the 6th heat exchanger and dilute solution inlet are sequentially communicated；
Compressor and saturator, the steam (vapor) outlet, compressor, saturator and the 6th heat exchanger are sequentially communicated, so that dilute
After solution and secondary steam exchange heat in the 6th heat exchanger, into the flash tank.
Further, further include the first spray unit, in the inner close to the setting of the middle and upper part of the absorption plant, and be located at
The top of the reservoir unit, concentrated solution outlet, the 5th heat exchanger and the first spray unit are sequentially communicated setting, after exchanging heat
Concentrated solution by first spray unit spray on the flue gas of rising；
Second spray unit is set in the absorption plant, the storage close to the reservoir unit and being disposed below
Liquid unit, First Heat Exchanger and the second spray unit are sequentially communicated setting, after exchanging heat with the solution after smoke contacts, then spray
Drench on neat stress, with neat stress reverse convection.
Further, in non-heating season, the first spray unit spray-absorption liquid, the second spray unit spray
Water or the first spray unit shower water, the second spray unit shower water；
In heating season, first spray unit and the equal spray-absorption liquid of second spray unit.
Further, the reservoir unit, First Heat Exchanger and the second spray unit are sequentially communicated, by the reservoir list
Solution in member is sent into second spray unit after exchanging heat；
The lower part of the absorption plant, the 5th heat exchanger, the 6th heat exchanger and dilute solution inlet are sequentially communicated, in described
Concentrated solution in 5th heat exchanger with the concentrated solution outlet from flash tank exchanges heat, then after the 6th heat exchanger heat exchange, most
After be sent into the flash tank.
It further, further include the second heat exchanger, the lower part of the absorption plant, the second heat exchanger and the second spray unit
It is sequentially communicated setting, weak solution is sent into second spray unit after exchanging heat；
Solution filters tempering system, and the lower part of the absorption plant, solution filter tempering system, the second heat exchanger and second
Spray unit is sequentially communicated setting, is sent into second spray unit after weak solution is filtered quenched and heat exchange；
It is sequentially communicated the dust-extraction unit and desulfurizer of setting, the desulfurizer is connected to the absorption plant, so that
After flue gas passes sequentially through the dust-extraction unit and desulfurizer, into the absorption plant.
It further, further include third heat exchanger and the 4th heat exchanger, the First Heat Exchanger, the second heat exchanger, third
Heat exchanger and the 4th heat exchanger are sequentially communicated, so that heat supply network water or low pressure condensation water pass sequentially through the First Heat Exchanger,
Two heat exchangers, third heat exchanger and the 4th heat exchanger, and exchange heat to the substance entered in corresponding heat exchanger.
Further, the 6th heat exchanger is connected to the third heat exchanger and/or the 4th heat exchanger, by described
After the pumping condensed water of six heat exchangers is sent into the third heat exchanger and/or the heat exchange of the 4th heat exchanger, back boiler water supply will be described
After the secondary steam condensed water of 6th heat exchanger is sent into the 4th heat exchanger and/or the heat exchange of third heat exchanger, mended as technique
Water-filling；
The steam (vapor) outlet is also connected to the 4th heat exchanger, by secondary steam be sent into the 4th heat exchanger into
Row heat exchange.
Further, further include economizer, be set between the dust-extraction unit and desulfurizer or air preheater and dedusting
Between device, the 4th heat exchanger is connected to the economizer, and condensed water and the flue gas from the dust-extraction unit are existed
Heat exchange in the economizer, and the flue gas after heat exchange is sent into the desulfurizer.
Further, gas inlet is arranged in the lower part of the absorption plant, and exhanst gas outlet, the exhanst gas outlet is arranged in top
It is connected to the chimney, first spray unit, the reservoir unit and second spray unit are respectively positioned on the flue gas
Between import and exhanst gas outlet；
Demister is set in the absorption plant, and between first spray unit and the exhanst gas outlet.
Further, the absorption plant lower part and second heat exchanger or second heat exchanger and the second spray
The first pump of setting between unit；
The absorption plant lower part and solution filtering tempering system or solution filtering tempering system and described the
The second pump of setting between two heat exchangers or second heat exchanger and second spray unit；
The absorption plant lower part and the 5th heat exchanger or the 5th heat exchanger and the 6th heat exchanger, or
Third is arranged between 6th heat exchanger and the flash tank to pump；
The concentrated solution outlet and setting the 4th between the 5th heat exchanger or the 5th heat exchanger and the first spray unit
Pump；
6th pump of both setting connections between the outlet end of the refrigerating plant and second spray unit.
Technical solution of the present invention has the advantages that
1, reservoir unit is arranged in the spray treatment device of flue gas provided by the invention in absorption plant, will be interior using it
Chamber is divided into the first fume treatment area and the second fume treatment area, and flue gas enters from the bottom of absorption plant to be sprayed at the top of absorption plant
Concentrated solution (such as dense saline solution) counter current contacting of leaching, it is thinning that the concentrated solution in the second fume treatment area absorbs moisture in flue gas, is precipitated
The latent heat discharged in moisture phase transition process heats flue gas and concentrated solution to 55 DEG C -65 DEG C；Concentrated solution after heating passes through reservoir list
Member draws to enter in First Heat Exchanger and exchange heat with heat transferring medium (such as hot net water), and heat transferring medium can be warmed 3-10 DEG C, concentrated solution
Be cooled to the second fume treatment area at the top of solution inlet port temperature it is substantially uniform after enter the first fume treatment area, continue to absorb
Moisture in flue gas is exchanged heat using step for the first time, can effectively promote the quality that heat is changed, meanwhile, cooperate with refrigerating plant, utilizes refrigeration
Device makes the liquid after heating enter second fume treatment area after the refrigerating plant is cooling, eventually by above-mentioned means
Depth recycles and is utilized the sensible heat of former flue gas and the latent heat of neat stress water vapour, and prior art flue gas cool-down is avoided to condense needs
A large amount of cold sources, are greatly saved water resource.Moisture in neat stress has been recycled simultaneously, is reduced systematic running cost and is used, solves fire coal
Power plant or other industry eliminate that coloured plume, depth water pumping system is only put into does not have the problem of income, reach efficient energy-saving and emission-reducing
Equal environment protectings, have good social and economic effect.
2, neat stress is greatly lowered first with absorption plant in the spray treatment device of flue gas provided by the invention
Moisture content, steam in by concentrated solution absorption process due to phase transformation discharge latent heat so that the mass dryness fraction and temperature of neat stress are mentioned
Height can reach the dustiness product low with water vapour in recycling neat stress eliminated coloured plume, depth water lift, reduce neat stress simultaneously
The effect of matter latent heat；Then the concentrated solution after absorbing vapor in absorption plant becomes weak solution, and a part is logical in weak solution
The cooling of the 5th heat exchanger is crossed, then is restored by regenerative system to original content, is finally returned to the second fume treatment area；Another part
Heat heat transferring medium (such as hot net water) by the second heat exchanger, return again to the first fume treatment area, two strands of uninterrupteds according to
Specific requirement adjustment, the water absorbing capacity of unit mass concentrated solution can be changed by adjusting two-way flow-rate ratio；In addition, it is sent to regeneration
Weak solution in system becomes dense molten by the way that flash regeneration in flash tank is exchanged heat and entered with the saturated vapor that regenerative system generates
Liquid, then be transported in absorption plant, the saturation generated after the compression of the secondary steam at the top of regenerative system is utilized in regenerative process
Steam, the saturated vapor for discharging latent heat become secondary steam condensed water, which is again introduced into the 4th heat exchanger
And/or third heat exchanger and hot net water exchange heat, the condensed water after cooling can be used for desulfurizer mist eliminator flushing water or as
Technique supplements water etc., reduces costs and energy consumption.It avoids regeneration using power plant steam, can effectively reduce steam consumption.
3, the spray treatment device of flue gas provided by the invention, regenerative system heating season are evacuated using steam turbine come steam pumping,
Condensed water is evacuated after the heat exchange of third heat exchanger, back boiler water supply；Non- heating season uses compressor+saturator+flash column
Secondary steam, the saturated vapor generated after compression, condensed water are used for the moisturizing of desulfurizer technique.Hot net water or low pressure condensation water are logical
Cross absorption plant First Heat Exchanger and the second heat exchanger heat exchange heating and then with the third heat exchanger of regenerative system and the 4th
Heat exchanger heat exchange, heating season reach hot net water temperature requirement, heating season backheat net；Non- heating season goes low plus or removes low-level (stack-gas) economizer
Gone again after heat exchange it is low plus, can be used for heating low pressure condensation water, keep non-heating season unit generation ability unaffected.By with top
Formula solves the problems, such as that coal-burning power plant or other industry eliminate that wet plume, depth water pumping system is only put into does not have income, pass through compression
Machine+saturator+flash distillation Tower System further recycles the latent heat of neat stress water vapour after desulfurizer, recycles water in neat stress
Point, it reduces systematic running cost and uses, reach the environment protectings such as efficient energy-saving and emission-reduction.
4, the spray treatment device of flue gas provided by the invention, not only former obvious heat of smoke can be used to heat hot net water or
Low pressure condensation water, can also a large amount of latent heat of water vapour in recovered flue gas simultaneously, depth Mist heat recovering, due to recycling latent heat mistake
Flue-gas temperature raises simultaneously in journey, can reduce flue gas moisture content simultaneously and improve flue-gas temperature, reaches recycling latent heat collaboration and eliminates
Coloured plume and reduction dust content effect.The device recycles saving water resource by depth water lift, since system is set
It is standby simple, system operation pressure drop about one third can be reduced compared with presently relevant technology, save operating cost, have good
Environmental protection and energy saving effect.
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 the layout drawing of the spray treatment device of flue gas in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of absorption plant in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of regenerative system in the embodiment of the present invention；
Wherein appended drawing reference indicates are as follows:
1- dust-extraction unit；2- desulfurizer；3- absorption plant；The first spray unit of 3-1-；The second spray unit of 3-2-；3-
3- reservoir unit；3-4- gas inlet；3-5- exhanst gas outlet；3-6- demister；4- economizer；5- first is pumped；6- second is pumped；7-
Solution filters tempering system；8- First Heat Exchanger；The second heat exchanger of 9-；10- third heat exchanger；The 4th heat exchanger of 11-；12-
Three pumps；The 5th heat exchanger of 13-；14- the 4th is pumped；15- compressor；16- saturator；The 6th heat exchanger of 17-；18- flash tank；19-
Chimney；The 7th heat exchanger of 20-；21- solution supplements tank；22- the 5th is pumped；23- refrigerating plant；24- the 6th is pumped；25- device for storing liquid；
26- water storage device.
Specific embodiment
Technical solution of the present invention is clearly and completely described below, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
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" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
A kind of spray treatment device of flue gas is present embodiments provided, as illustrated in fig. 1 and 2, including being sequentially communicated setting
Dust-extraction unit 1, desulfurizer 2 and absorption plant 3, if dust-extraction unit 1 can be electric precipitator, desulfurizer 2 can be desulfurizing tower, inhale
Receiving apparatus 3 can be absorption tower, and absorption tower can be void tower or packed tower, and when for packed tower, filler can be single-layer or multi-layer, utilize
Filler is as gas-liquid contact face, when for void tower, forms gas-liquid contact face, the lower part setting of absorption plant 3 by spraying using void tower
Exhanst gas outlet 3-5 is arranged in gas inlet 3-4, top, further includes reservoir unit 3-3, such as reservoir unit 3-3 can be liquid dish,
As shown in figure 3, liquid dish has the disk being adapted with desulfurizing tower inner cavity, through-hole is opened up on disk, along the axial direction side of desulfurizing tower
To, through-hole has the extended segment extended to desulfurization column overhead, and it is reservoir space between adjacent extended segment, is set in absorption plant 3,
And its inner cavity is divided into the first fume treatment area and the second fume treatment area, flue gas is suitable for passing through reservoir from the first fume treatment area
Unit 3-3 enters the second fume treatment area；Specifically, reservoir unit 3-3 may be disposed in the middle part of desulfurizing tower；
First Heat Exchanger 8, liquid feeding end are connected to reservoir unit 3-3, and outlet end is close to reservoir unit 3-3 and the first flue gas
Treatment region connection so that the solution of 3-3 enters heat exchange in First Heat Exchanger 8 in reservoir unit, and the solution after heat exchange is sent into
First fume treatment area and smoke contacts；
The liquid feeding end of refrigerating plant 23, refrigerating plant 23 is connected to the lower part of absorption plant 3, the outlet end of refrigerating plant 23
It is connected to the second fume treatment area, so that the liquid after heating enters the second fume treatment area after refrigerating plant 23 is cooling；?
In the present embodiment, refrigerating plant 23 is cooling tower or enclosed induced cooling tower；The outlet end of refrigerating plant 23 is changed with first
Hot device 8 is connected to, and recirculated cooling water and the liquid from reservoir unit 3-3 are exchanged heat in First Heat Exchanger 8.
In above-mentioned spray treatment device, reservoir unit 3-3 is set in absorption plant 3, inner cavity is divided into first using it
Fume treatment area and the second fume treatment area, flue gas enter dense molten with 3 top spray of absorption plant from the bottom of absorption plant 3
Liquid (such as dense saline solution) counter current contacting, it is thinning that the concentrated solution in the second fume treatment area absorbs moisture in flue gas, and moisture phase transformation is precipitated
The latent heat discharged in the process heats flue gas and concentrated solution to 55 DEG C -65 DEG C；Concentrated solution after heating is drawn by reservoir unit 3-3
Enter in First Heat Exchanger out and exchange heat with heat transferring medium (such as hot net water), heat transferring medium can be warmed 3-10 DEG C, concentrated solution cooling
It is extremely substantially uniform later into the first fume treatment area with solution inlet port temperature at the top of the second fume treatment area, continue to absorb flue gas
Middle moisture is exchanged heat using step for the first time, can effectively promote the quality that heat is changed, meanwhile, cooperate with refrigerating plant 23, is filled using refrigeration
It sets the liquid after making heating and enters second fume treatment area after the refrigerating plant is cooling, it is deep eventually by above-mentioned means
Degree recycles and the sensible heat of former flue gas and the latent heat of neat stress water vapour is utilized, and avoids the condensation of prior art flue gas cool-down from needing big
Cold source is measured, water resource is greatly saved.Moisture in neat stress has been recycled simultaneously, systematic running cost has been reduced and uses, and solves coal-fired electricity
Factory or other industry eliminate that coloured plume, depth water pumping system is only put into does not have the problem of income, reach efficient energy-saving and emission-reducing etc.
Environment protecting has good social and economic effect.
Further, further include water storage device 26, be connected to the lower part of absorption plant 3, in non-heating season, water storage to be filled
It sets the water in 26 and is sent into absorption plant 3 circulated sprinkling for carrying out flue gas；Water in absorption plant 3 is stored in by heating season
In water installations 26；Specifically, water storage device 26 is filtered water tank；
Device for storing liquid 25 is connected to the lower part of absorption plant 3, in non-heating season, the absorbing liquid in absorption plant 3 to be stored up
It is stored in device for storing liquid 25；Absorbing liquid in device for storing liquid 25 is sent into absorption plant 3 by heating season.
As shown in figure 3, further including regenerative system, regenerative system includes flash tank 18, and dilute solution inlet is arranged in middle part, on
Steam (vapor) outlet is arranged in portion, and lower part is arranged concentrated solution and exports；6th heat exchanger 17, the lower part of absorption plant 3,17 and of the 6th heat exchanger
Dilute solution inlet is sequentially communicated；Compressor 15 and saturator 16, steam (vapor) outlet, compressor 15, saturator 16 and the 6th heat exchanger
17 are sequentially communicated, so that after weak solution and secondary steam exchange heat in the 6th heat exchanger 17, into flash tank 18.
In addition, the driving heat source heating season of regenerative system is machine assembly air-exhausting；Non- heating season uses compressor+saturator+sudden strain of a muscle
The saturated vapor that the secondary steam of tower generates is steamed, compressor+saturator+flash distillation Tower System can make non-heating season unit generation ability
It is unaffected.Not equality of temperature is heated to by heat supply network heat exchanger in Various Seasonal hot net water or circulation heat medium water or low pressure condensation water
Degree.
It in the present embodiment, further include the first spray unit 3-1, in the inner close to the setting of the middle and upper part of absorption plant 3, and
Positioned at the top of reservoir unit 3-3, concentrated solution outlet, the 5th heat exchanger 13 and the first spray unit 3-1 are sequentially communicated setting, with
Concentrated solution after heat exchange is sprayed by the first spray unit 3-1 on the flue gas of rising；Specifically, the first spray unit 3-1
It is 1-2, is in the present embodiment 1, when for two, is divided into upper layer and lower layer spraying layer, preferably two layers；
Second spray unit 3-2 is set in absorption plant 3, reservoir unit close to reservoir unit 3-3 and being disposed below
3-3, First Heat Exchanger 8 and the second spray unit 3-2 are sequentially communicated setting, after exchanging heat with the solution after smoke contacts, then
Spray on neat stress, with neat stress reverse convection；Specifically, the first spray unit 3-1 and the second spray unit 3-2 are wrapped
It includes spray conduit and is spaced the spray nozzle being arranged on, and the first spray unit 3-1 and the second spray unit 3-2 are close to absorb
It the exhanst gas outlet 3-5 of device 3 and is disposed below, in this way extension counter current contacting distance, it can heat effectively in recovered flue gas；Tool
Body, the second spray unit 3-2 is 2-4, is in the present embodiment two, is divided into upper layer and lower layer spraying layer, preferably three layers.
In non-heating season, the first spray unit 3-1 spray-absorption liquid, the second spray unit 3-2 shower water or the first spray
Drench unit 3-1 shower water, the second spray unit 3-2 shower water；
In heating season, the first spray unit 3-1 and the equal spray-absorption liquid of the second spray unit 3-2.
Specifically, reservoir unit 3-3, First Heat Exchanger 8 and the second spray unit 3-2 are sequentially communicated, by reservoir unit
Solution in 3-3 is sent into second spray unit after exchanging heat；First spray unit 3-1 and the second spray unit 3-2 are wrapped
It includes spray conduit and is spaced the spray nozzle being arranged on, and the first spray unit 3-1 and the second spray unit 3-2 are close to absorb
It the exhanst gas outlet of device 3 and is disposed below, in this way extension counter current contacting distance, it can heat effectively in recovered flue gas.
The lower part of absorption plant 3, the 5th heat exchanger 13, the 6th heat exchanger 17 and dilute solution inlet are sequentially communicated, and will be inhaled
It receives tower tower bottom solution to exchange heat in the concentrated solution in the 5th heat exchanger 13 with the concentrated solution outlet from flash tank, then through the 6th heat exchange
After device 17 exchanges heat, it is finally sent into flash tank 18；5th heat exchanger 13 can be plate heat exchanger；
In addition, also setting up the 7th heat exchanger 20, the concentrated solution come out out of the 5th heat exchanger 13 can enter the 7th heat exchanger
20, with after hot net water or the heat exchange of low plus condensed water, enter back into absorption plant 3.
In actual production process, in Heating Season, flue gas enters the dense salt with absorption tower top spray from absorb the bottom of the tower
Countercurrently, moisture is thinning in dense saline solution absorption flue gas at the top of absorption tower for solution, is precipitated in moisture phase transition process and discharges latent heat, heats
Flue gas and salting liquid are to 55 DEG C -70 DEG C.Heat supply network return water and weak solution heat exchange are heated to 40-65 DEG C, the weak solution after exchanging heat
Into the heating that exchanges heat in the 5th heat exchanger 13, subsequently enters regenerative system and gasified and flashed, the moisture of absorption is become two
Secondary steam, the concentrated solution of flash tank bottom, which enters in the 5th heat exchanger 13, is back to absorption tower top spray after heat exchange.Heating season
When, pumping condensed water enters third heat exchanger and/or the 4th heat exchanger exchanges heat with hot net water, the secondary steaming of flash drum overhead
Vapour enters the 4th heat exchanger and/or hot net water is promoted to 85 DEG C or so and is used to heat by third heat exchanger.
Non- heating season, if also need carry out flue gas water lift, use regenerative system, secondary steam from flash drum overhead exclude into
Enter compressor, become superheated steam through heating, become saturated vapor by spray, as flash tank driving heat source, release
Become condensed water after latent heat, which exchanges heat with hot net water again, hot net water (low pressure condensation water) can be heated to 60 DEG C
Left and right, the condensed water after cooling can be used for desulfurizer mist eliminator flushing water etc..Non- heating season can be made to take out by such method of operation
Gas energy consumption is almost cancelled out each other with recycling energy consumption, is not had a negative impact to unit generation ability.
Refrigerating plant is utilized simultaneously, is saturated neat stress cooling bleed using clear water spray in non-heating season come cooled flue gas,
To reach water lift effect, specifically, non-heating season send the absorbing liquid part of absorption tower lower semisection bottom to absorption tower upper half
Section bottom, so that upper semisection bottom absorbing liquid has certain liquid level in reservoir unit 3-3, later by absorption tower lower semisection residual absorption
Liquid is discharged into device for storing liquid 25 completely, then clear water is imported absorption tower lower semisection from filtered water tank, and absorption tower has in lower semisection bottom
Filtered water tank branch is closed after certain water, and absorb the bottom of the tower clear water is sent to absorption tower lower semisection top and is sprayed, is sprayed
In absorption tower after mass-and heat-transfer, flue-gas temperature is reduced for water and flue gas, and circulating water temperature increases, and condensed water enters circulating cooling
Water, it is cooling that the recirculated cooling water after the heating of absorption tower lower semisection bottom is sent to refrigerating plant.Refrigerating plant using cooling tower or
Enclosed induced cooling tower, the recirculated cooling water after heating can be sent directly to cooling tower or enclosed induced cooling tower,
The water got back in cooling tower is taken away by air, and enclosed induced cooling tower cannot evaporate extra condensed water,
Excessive moisture will be excluded before into enclosed induced cooling tower, it is remaining to enter back into induced cooling tower；In order to flexible
Regulation, the recirculated cooling water after heating can pass through regenerative system and the cooling water from cooling tower or enclosed induced cooling tower
Heat exchange, the tower bottom recirculated cooling water equally to heat up are also required to exclude condensed water before entering the 5th heat exchanger.Using on absorption tower
Half section of bottom concentrated solution, which is sent to absorption tower upper semisection top spray, to be absorbed and from the ventilator at the top of the lower semisection of absorption tower
Flue gas mass-and heat-transfer makes flue gas saturation temperature since neat stress reduces smoke temperature using recirculated cooling water in absorption tower lower semisection
Degree reduces, and flue gas water content reduces, and when it is in absorption tower upper semisection and absorbing liquid adverse current, absorbing liquid continues to draw water in flue gas
Point, steam becomes liquid phase from gas phase in flue gas, discharges latent heat, while heating flue gas and absorbing liquid, can reach flue gas reheat effect.
The absorbing liquid of water suction heating is pumped toward regenerative system, and absorption tower upper semisection bottom weak solution is introduced into the heat exchange of the 5th heat exchanger,
Subsequently enter the gasification of the 6th heat exchanger section, the weak solution after partial gasification enters flash tank flash separation, and secondary steam is from sudden strain of a muscle
Compressor is entered back at the top of steaming pot, the concentrated solution of flash tank bottom enters the 5th heat exchanger and weak solution exchanges heat, and is finally sent to suction
It receives tower upper semisection top spray and carries out water suction recycling heat.
Furthermore the double-deck absorption tower can also carry out clear water spray with upper layer and lower layer, and effect merchandiser layer absorption tower is consistent.It is logical
It crosses absorption tower upper-lower section and carries out spray low-temperature cooling water, saturated flue gas and shower water heat and mass, flue-gas temperature summer is down to
48 DEG C, winter is down to 45 DEG C, and absorb the bottom of the tower shower water and axis add condensed water heat exchange or refrigerating plant, reduces machine assembly air-exhausting, changes
Shower water after heat is back to absorption tower again；Absorb the bottom of the tower shower water is sent to cold water tower cooler, recycles after cooling.
Embodiment 2
The spray treatment device for present embodiments providing a kind of flue gas is changed on the basis of above-described embodiment 1 in order to improve
Thermal effect, sufficiently recycles the latent heat of the sensible heat and neat stress water vapour in former flue gas, and waste liquid is sufficiently regenerated, and further includes second
Heat exchanger 9, the lower part of absorption plant 3, the second heat exchanger 9 and the second spray unit 3-2 are sequentially communicated setting, weak solution are passed through
The second spray unit 3-2 is sent into after heat exchange；Meanwhile in order to which the concentrated solution in absorption plant as absorbing liquid is filtered and is adjusted
System, further includes solution filtering tempering system 7, the lower part of absorption plant 3, solution filtering tempering system 7, the second heat exchanger 9 and the
Two spray unit 3-2 are sequentially communicated setting, are sent into the second spray unit 3-2 after weak solution is filtered quenched and heat exchange；Tool
Body, as shown in Fig. 2, solution filtering tempering system 7 is made of the cyclone+filter being sequentially communicated, while setting successively connects
Logical solution supplement tank 21 and the 5th pump 22, the 5th pump 22 is connected to solution filtering tempering system 7, with make-up solution into it.
Embodiment 3
The spray treatment device for present embodiments providing a kind of flue gas further includes on the basis of above-described embodiment 1 or 2
Third heat exchanger 10 and the 4th heat exchanger 11, First Heat Exchanger 8, the second heat exchanger 9, third heat exchanger 10 and the 4th heat exchanger 11
It is sequentially communicated, so that heat supply network water or low pressure condensation water pass sequentially through First Heat Exchanger 8, the second heat exchanger 9, third heat exchanger 10
With the 4th heat exchanger 11, and to enter corresponding heat exchanger in substance exchange heat；
Further, the 6th heat exchanger 17 is connected to third heat exchanger 10 and the 4th heat exchanger 11, by the 6th heat exchanger
After 17 pumping condensed water is sent into third heat exchanger 10 and/or the heat exchange of the 4th heat exchanger 11, back boiler water supply, by the 6th heat exchanger
After 17 secondary steam condensed water is sent into the 4th heat exchanger 11 and/or the heat exchange of third heat exchanger 10, water is supplemented as technique；Steam
Outlet is also connected to the 4th heat exchanger 11, and secondary steam is sent into the 4th heat exchanger 11 and is exchanged heat；
In order to realize the flowing of liquid, 3 lower part of absorption plant and the second heat exchanger 9 or the second heat exchanger 9 and the second spray
The first pump 5 of setting between unit 3-2；3 lower part of absorption plant and solution filtering tempering system 7 or solution filtering tempering system 7 with
The second pump 6 of setting between second heat exchanger 9 or the second heat exchanger 9 and the second spray unit 3-2；3 lower part of absorption plant and the 5th
Third is arranged between heat exchanger 13 or the 5th heat exchanger 13 and the 6th heat exchanger 17 or the 6th heat exchanger 17 and flash tank 17 to pump
12；Concentrated solution outlet and the 4th pump 14 of setting between the 5th heat exchanger 13 or the 5th heat exchanger 13 and the first spray unit 3-1.
It is used to supply in addition, hot net water is promoted to 85 DEG C or so into the 4th heat exchanger by the secondary steam of flash drum overhead
It is warm；The heating of secondary steam compression+saturation steam is entered plate-type heat-exchange using compressor+saturator+flash column by non-heating season
Hot net water (low pressure condensation water) can be heated to 60 DEG C or so by the weak solution of device, condensed water, for heating low pressure condensation water, be led to
Crossing such method of operation can make non-heating season air exhaust energy consumption cancel out each other with recycling energy consumption, not generate negatively to unit generation ability
It influences.The concentrated solution of flash tank bottom in the 5th heat exchanger 13 (dilute concentrated solution heat exchanger) with weak solution exchange heat, then again with
Absorption tower top is back to after 7th heat exchanger (heat exchange of concentrated solution heat exchanger).Non- heating season secondary steam is arranged from regenerator overhead
Enter compressor out, becomes superheated steam through heating, become saturated vapor by spray, as regenerator driving heat source,
Become condensed water after release latent heat, which exchanges heat with third heat exchanger again.
Embodiment 4
The spray treatment device for present embodiments providing a kind of flue gas is also wrapped on the basis of above-described embodiment 1,2 or 3
Economizer 3-6 is included, is set between dust-extraction unit 1 and desulfurizer 2 or between air preheater and dust-extraction unit 1, the 4th exchanges heat
Device 11 is connected to economizer 3-6, and condensed water is exchanged heat in economizer 3-6 with the flue gas from dust-extraction unit 1, and will heat exchange
Flue gas afterwards is sent into desulfurizer 2.
Further, gas inlet 3-4 is arranged in the lower part of absorption plant 3, and exhanst gas outlet 3-5, exhanst gas outlet is arranged in top
3-5 is connected to chimney 19, and the first spray unit 3-1, reservoir unit 3-3 and the second spray unit 3-2 are respectively positioned on gas inlet 3-4
Between exhanst gas outlet 3-5；Demister 3-6 is set in absorption plant 3, and is located at the first spray unit 3-1 and exhanst gas outlet
Between 3-5.
If desired smoke temperature is promoted to higher temperature, can be arranged on flue behind the exhanst gas outlet 3-4 of absorption plant 3
Heat exchanger or the inner-heating tube at the top of 3 upper section of absorption plant again, by the temperature that smoke temperature is heated to environmental protection or owner needs.
In addition, the specific working principle of above-mentioned apparatus is as follows:
As illustrated in fig. 1 and 2, flue gas enters and the dense saline solution of absorption tower top spray adverse current, absorption from absorb the bottom of the tower
Moisture is thinning in dense saline solution absorption flue gas at the top of tower upper section, is precipitated in moisture phase transition process and discharges latent heat, heats flue gas and salt
Solution is to 55 DEG C -65 DEG C.Solution after heating is drawn by upper section bottom liquid dish enters First Heat Exchanger (heat supply network level-one heat exchange
Device) exchange heat with hot net water, hot net water can be warmed 3-10 DEG C, salting liquid be cooled to it is consistent with solution inlet port temperature at the top of upper section it
Enter at the top of the lower section of absorption tower afterwards, continues to absorb moisture in flue gas, absorption tower lower section bottom weak solution is respectively by first pump (dilute salt
Solution pump) it is sent to the second heat exchanger (heat supply network secondary heat exchanger) and the 5th heat exchanger (dilute concentrated solution heat exchanger), the first heat exchange out
The hot net water of device (heat supply network first-class heat exchanger) and the weak solution for entering the second heat exchanger (heat supply network secondary heat exchanger) exchange heat, by lower section
It is consistent that bottom weak solution is cooled to First Heat Exchanger taphole temperature, and exports with First Heat Exchanger (heat supply network first-class heat exchanger)
Solution is mixed into absorption tower lower section top spray, and hot net water is heated to 50-60 DEG C；Into the 5th heat exchanger (dilute concentrated solution
Heat exchanger) weak solution with from regenerative system come concentrated solution heat exchange after enter regenerative system.It is dilute after being heated through concentrated solution
Solution enter the 6th heat exchanger (plate heat exchanger) be continuously heating to 120 DEG C -140 DEG C (heat source be heating season using pump group steaming
Vapour, non-heating season pass through compressor+saturator+flash column secondary steam), then carry out flash tank flash distillation.When heating season, take out
Air cooling condensate enters third heat exchanger 10 (heat supply network three-level heat exchanger) and/or the 4th heat exchanger 11 (heat supply network level Four heat exchanger) and heat
Net water exchanges heat, and the secondary steam of flash drum overhead enters the 4th heat exchanger 11 (heat supply network level Four heat exchanger) and/or third is changed
Hot net water is promoted to 85 DEG C or so and is used to heat by hot device 10 (heat supply network three-level heat exchanger)；Non- heating season utilizes compressor+saturation
The heating of secondary steam compression+saturation steam is entered the weak solution of the 6th heat exchanger (plate heat exchanger), flash distillation by device+flash column
Secondary steam temperature is about 95 DEG C -110 DEG C at the top of device, is determined by concentration of salt solution used and water absorption, and secondary steam is from flash distillation
Tank top enters the superheated steam of compressor compresses to 300 DEG C or so, becomes about 130 DEG C -150 DEG C of temperature by spray saturation
Hot net water (low pressure condensation water) can be heated to 57 DEG C -70 DEG C or so by saturated vapor, condensed water, for heating low plus condensation
Water, or it is connected with low low-level (stack-gas) economizer, its temperature is continued to lift up to 65 DEG C -85 DEG C.Condensed water after cooling can be used for
Desulfurizer mist eliminator flushing water etc..Beginning sorption type heat pump system COP can be made to be promoted to 3-4 by such method of operation, can made non-
Heating season air exhaust energy consumption is cancelled out each other with recycling energy consumption, is not had a negative impact to unit generation ability.Flash tank bottom it is dense
Solution exchanges heat in the 5th heat exchanger (dilute concentrated solution heat exchanger) with weak solution, then is cooled to 30 by concentrated solution cooling heat exchanger
DEG C -50 DEG C are back at the top of the upper section of absorption tower and are recycled.
Specifically, desulfurizing tower lower section bottom solution is divided into three parts: first part returns after exchanging heat with heat supply network secondary heat exchanger
It returns and forms partial circulating at the top of the lower section of absorption tower；Second part enters regenerative system after being sent to dilute concentrated solution heat exchanger heating；
On the one hand Part III, which enters the quenched unit of solution filtering, can pass through rotation in the quenched unit of absorption tower lower section bottom ancillary filter
Flow crystal salt (sulfate, carbonate that device+filter device removes the solution solid particulate matter accumulated in absorption tower and generation
Deng) etc. substances, the pollutant for making absorption tower solution and Control of Impurities are to a certain degree；On the other hand calcium base salt is added, adjusts molten
The pH of liquid, keeps the absorbability of solution, while reducing the corrosivity of solution.Absorbing liquid enters at the top of absorption tower, by equal
Even spray and the neat stress reverse convection entered from absorb the bottom of the tower, water vapour is absorbed by concentrated solution in neat stress, upper section and under
The respective settable spare level of spraying layer of section, to improve the reliability on absorption tower.By adjusting absorption tower lower section partial circulating solution
The water absorbing capacity for measuring controllable unit mass salting liquid, arranges absorption tower, since absorb the bottom of the tower flue gas contains after desulfurizing tower
Water rate is high, and most of water suction occurs in this section, partial circulating is arranged in absorb the bottom of the tower, by reducing the control of partial circulating solution temperature
Lower section equilibrium temperature in absorption tower processed, to improve the water absorbing capacity of unit mass solution, the weak solution concentration after absorption is relatively dense
The ratio of solution reduction 1%-10%, partial circulating internal circulating load and regeneration cycle amount can be in 1:1-10:1.Desulfurizing tower in original system
It is not required to do any transformation, it includes single column Two-way Cycle and double tower binary cycle system which, which is suitable for desulfurization Tower System,.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of spray treatment device of flue gas, including absorption plant, which is characterized in that further include,
Reservoir unit is set in the absorption plant, and its inner cavity is divided into the first fume treatment area and the second fume treatment
Area, flue gas are suitable for entering second fume treatment area from first fume treatment area by the reservoir unit；
First Heat Exchanger, liquid feeding end are connected to the reservoir unit, and outlet end is close to the reservoir unit and first cigarette
Gas disposal area connection, so that the solution in the reservoir unit enters heat exchange in the First Heat Exchanger, and will be molten after heat exchange
Liquid is sent into first fume treatment area and smoke contacts；
Refrigerating plant, the liquid feeding end of the refrigerating plant are connected to the lower part of the absorption plant, and the refrigerating plant goes out liquid
End is connected to second fume treatment area, so that the liquid after heating enters second cigarette after the refrigerating plant is cooling
Gas disposal area.
2. smoke processing system according to claim 1, which is characterized in that further include water storage device, filled with the absorption
The lower part connection set, the water in the water storage device to be sent into the absorption plant and carries out following for flue gas in non-heating season
Ring spray leaching；Water in the absorption plant is stored in the water storage device by heating season；
Device for storing liquid is connected to the lower part of the absorption plant, in non-heating season, the absorbing liquid in the absorption plant to be stored up
It is stored in the device for storing liquid；Absorbing liquid in the device for storing liquid is sent into the absorption plant by heating season；And/or
The outlet end of the refrigerating plant is connected to the First Heat Exchanger, by recirculated cooling water and comes from the reservoir unit
Liquid exchange heat in the First Heat Exchanger.
3. smoke processing system according to claim 2, which is characterized in that it further include regenerative system, the regenerative system
Including,
Dilute solution inlet is arranged in flash tank, middle part, and steam (vapor) outlet is arranged in top, and lower part is arranged concentrated solution and exports；
6th heat exchanger, the lower part of the absorption plant, the 6th heat exchanger and dilute solution inlet are sequentially communicated；
Compressor and saturator, the steam (vapor) outlet, compressor, saturator and the 6th heat exchanger are sequentially communicated, so that weak solution
After exchanging heat in the 6th heat exchanger with secondary steam, into the flash tank.
4. smoke processing system according to claim 2, which is characterized in that further include,
First spray unit in the inner close to the setting of the middle and upper part of the absorption plant, and is located at the top of the reservoir unit,
Concentrated solution outlet, the 5th heat exchanger and the first spray unit are sequentially communicated setting, and the concentrated solution after exchanging heat passes through described the
One spray unit is sprayed on the flue gas of rising；
Second spray unit is set in the absorption plant, the reservoir list close to the reservoir unit and being disposed below
Member, First Heat Exchanger and the second spray unit are sequentially communicated setting, after exchanging heat with the solution after smoke contacts, then spray in
On neat stress, with neat stress reverse convection；And/or
In non-heating season, the first spray unit spray-absorption liquid, the second spray unit shower water or described first
Spray unit shower water, the second spray unit shower water；
In heating season, first spray unit and the equal spray-absorption liquid of second spray unit.
5. smoke processing system according to claim 4, which is characterized in that the reservoir unit, First Heat Exchanger and
Two spray units are sequentially communicated, and the solution in the reservoir unit is sent into second spray unit after exchanging heat；
The lower part of the absorption plant, the 5th heat exchanger, the 6th heat exchanger and dilute solution inlet are sequentially communicated, in the described 5th
Concentrated solution in heat exchanger with the concentrated solution outlet from flash tank exchanges heat, then after the 6th heat exchanger heat exchange, finally send
Enter the flash tank.
6. smoke processing system according to claim 4 or 5, which is characterized in that further include,
Second heat exchanger, the lower part of the absorption plant, the second heat exchanger and the second spray unit are sequentially communicated setting, will be dilute
Solution is sent into second spray unit after exchanging heat；
Solution filters tempering system, lower part, solution filtering tempering system, the second heat exchanger and the second spray of the absorption plant
Unit is sequentially communicated setting, is sent into second spray unit after weak solution is filtered quenched and heat exchange；
It is sequentially communicated the dust-extraction unit and desulfurizer of setting, the desulfurizer is connected to the absorption plant, so that flue gas
After passing sequentially through the dust-extraction unit and desulfurizer, into the absorption plant.
7. smoke processing system according to claim 6, which is characterized in that further include,
Third heat exchanger and the 4th heat exchanger, the First Heat Exchanger, the second heat exchanger, third heat exchanger and the 4th heat exchanger according to
Secondary connection so that heat supply network water or low pressure condensation water pass sequentially through the First Heat Exchanger, the second heat exchanger, third heat exchanger and
4th heat exchanger, and exchange heat to the substance entered in corresponding heat exchanger.
8. smoke processing system according to claim 7, which is characterized in that the 6th heat exchanger and the third exchange heat
The pumping condensed water of 6th heat exchanger is sent into the third heat exchanger and/or the by device and/or the connection of the 4th heat exchanger
After the heat exchange of four heat exchangers, the secondary steam condensed water of the 6th heat exchanger is sent into the 4th heat exchanger by back boiler water supply
And/or after the heat exchange of third heat exchanger, water is supplemented as technique；
The steam (vapor) outlet is also connected to the 4th heat exchanger, and secondary steam is sent into the 4th heat exchanger and is changed
Heat.
9. smoke processing system according to claim 8, which is characterized in that further include,
Economizer is set between the dust-extraction unit and desulfurizer or between air preheater and dust-extraction unit, and the described 4th changes
Hot device is connected to the economizer, and condensed water is exchanged heat in the economizer with the flue gas from the dust-extraction unit, and
Flue gas after heat exchange is sent into the desulfurizer.
10. the smoke processing system according to any one of claim 4-9, which is characterized in that under the absorption plant
Gas inlet is arranged in portion, and exhanst gas outlet is arranged in top, and the exhanst gas outlet is connected to the chimney, first spray unit,
The reservoir unit and second spray unit are respectively positioned between the gas inlet and exhanst gas outlet；
Demister is set in the absorption plant, and between first spray unit and the exhanst gas outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457496.XA CN109442449B (en) | 2018-11-30 | 2018-11-30 | Spraying treatment device for flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457496.XA CN109442449B (en) | 2018-11-30 | 2018-11-30 | Spraying treatment device for flue gas |
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| CN111256220A (en) * | 2020-01-20 | 2020-06-09 | 刘立新 | Full-automatic vacuum flash evaporation regeneration solution dehumidification constant-temperature constant-humidity air conditioning system |
| CN113324260A (en) * | 2021-04-01 | 2021-08-31 | 昊姆（上海）节能科技有限公司 | Open type absorption and open type generation heat pump system and method for improving boiler efficiency |
| CN114893786A (en) * | 2022-04-18 | 2022-08-12 | 北京科技大学 | Boiler flue gas total heat degree of depth recovery unit |
| CN116459653A (en) * | 2023-05-18 | 2023-07-21 | 北京天地融创科技股份有限公司 | Falling film absorber |
| CN116474527A (en) * | 2023-05-18 | 2023-07-25 | 北京天地融创科技股份有限公司 | Multistage flue gas absorption system |
| CN116658886A (en) * | 2023-05-18 | 2023-08-29 | 北京天地融创科技股份有限公司 | Boiler heat energy recovery device |
| CN117282232A (en) * | 2023-11-24 | 2023-12-26 | 中国华能集团清洁能源技术研究院有限公司 | Spray cooling system |
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| CN117282232A (en) * | 2023-11-24 | 2023-12-26 | 中国华能集团清洁能源技术研究院有限公司 | Spray cooling system |
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