CN109395539A - It is a kind of to spray the white device that disappears - Google Patents
It is a kind of to spray the white device that disappears Download PDFInfo
- Publication number
- CN109395539A CN109395539A CN201811459612.1A CN201811459612A CN109395539A CN 109395539 A CN109395539 A CN 109395539A CN 201811459612 A CN201811459612 A CN 201811459612A CN 109395539 A CN109395539 A CN 109395539A
- Authority
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- China
- Prior art keywords
- heat exchanger
- absorption plant
- heat
- water
- circulation circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims abstract description 69
- 238000010521 absorption reaction Methods 0.000 claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 239000007788 liquid Substances 0.000 claims abstract description 67
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000003546 flue gas Substances 0.000 claims abstract description 54
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 25
- 230000001172 regenerating effect Effects 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 14
- 238000005496 tempering Methods 0.000 claims description 13
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- 239000000498 cooling water Substances 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 5
- 238000007701 flash-distillation Methods 0.000 claims description 4
- 238000007710 freezing Methods 0.000 claims description 4
- 230000008014 freezing Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 230000002411 adverse Effects 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 32
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 7
- 229920006395 saturated elastomer Polymers 0.000 abstract description 6
- 238000009938 salting Methods 0.000 abstract description 4
- 230000007704 transition Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 10
- 230000003009 desulfurizing effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- 239000003595 mist Substances 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000036961 partial effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002699 waste material 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
- 230000008859 change Effects 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
- 239000000428 dust Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000000670 limiting effect Effects 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
- 239000000203 mixture Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 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
- 239000010959 steel Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—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
- B01D53/1431—Pretreatment by other processes
-
- 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
-
- 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
- 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
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The white device that disappears is sprayed the invention discloses a kind of.The device passes through setting at least one level second circulation circuit, the second heat exchanger of refrigerating plant and at least one level, flue gas enters the concentrated solution or clear water counter current contacting with absorption plant top spray from the bottom of absorption plant, in heating season, it is thinning that concentrated solution absorbs moisture in flue gas, it is precipitated in moisture phase transition process and discharges latent heat, heat flue gas and salting liquid, solution after heating passes through the second heat exchanger or refrigerating plant heat exchange on second circulation circuit, and the flexible in size for taking away heat is utilized to control the equilibrium state in absorption plant；In non-heating season, other than using concentrated solution, can be also sprayed using clear water come cooled flue gas, be saturated neat stress cooling bleed, thus reach water lift effect, after the water after heating can be by the second heat exchanger or refrigerating plant heat exchange, recycling.It is recycled eventually by above-mentioned means depth 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 to spray the white device that disappears.
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 no income, disappears white device to propose a kind of spray.
For this purpose, the technical solution that the application takes is,
It is a kind of to spray disappear white device, including absorption plant, further include,
At least one level second circulation circuit, the liquid feeding end in the second circulation circuit and the lower part of the absorption plant connect
Logical, outlet end is connected to the top of the absorption plant, so that the liquid of the outlet end enters in the absorption plant, and with
Into the flue gas adverse current contact in the absorption plant；
Refrigerating plant, in the fluid direction of motion in the second circulation circuit, the liquid feeding end of the refrigerating plant with it is upper
The liquid of the absorption plant lower part is sent into the refrigerating plant, the refrigerating plant by the second circulation circuit communication of trip
Outlet end and downstream second circulation circuit communication, liquid after freezing is sent into the absorption plant.
The second heat exchanger of at least one level is set on the second circulation circuit, and is located at the feed liquor of the refrigerating plant
End and outlet end are respectively between the tie point in the second circulation circuit.
Further, the outlet end of the refrigerating plant is connected to second heat exchanger, by recirculated cooling water and is come
It exchanges heat in second heat exchanger from the liquid of the absorption plant lower part.
Further, further include first circulation circuit, liquid feeding end is connected to the lower part of the absorption plant, outlet end with
The top of the absorption plant is connected to；
First spray unit is arranged in it close to the top of the absorption plant, first spray unit and described the
The outlet end of one circulation loop is connected to；
The second spray unit of at least one level, the top close to the absorption plant are arranged in it, second spray unit
It is connected to the outlet end in the second circulation circuit.
It further, further include water storage device, and the second circulation circuit communication, and the water storage device and described the
The tie point of two circulation loops is close to the lower part of the absorption plant, in non-heating season, the water in the water storage device to be sent
Enter to carry out the circulated sprinkling of flue gas in the absorption plant；Water in the absorption plant is stored in the water storage by heating season
In device；
Device for storing liquid, and the first circulation circuit communication, and the company of the device for storing liquid and the first circulation circuit
Contact is close to the lower part of the absorption plant, in non-heating season, the absorbing liquid in the absorption plant is stored in the storage
In liquid device；Absorbing liquid in the device for storing liquid is sent into the absorption plant by heating season.
It further, further include regenerative system, the regenerative system is set on the first circulation circuit, the regeneration
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, to supply
After warm season exchanges heat the weak solution of the absorption plant lower part and secondary steam in the 6th heat exchanger, into described
Flash tank.
Further, further include the 5th heat exchanger, be set on the first circulation circuit, under the absorption plant
Portion, the 5th heat exchanger, the 6th heat exchanger and dilute solution inlet are sequentially communicated, in the 5th heat exchanger and from flash tank
Concentrated solution outlet concentrated solution heat exchange, then through the 6th heat exchanger heat exchange after, be finally sent into the flash tank.
Further, further include solution filtering tempering system, the lower part of the absorption plant, solution filtering tempering system,
Second heat exchanger and the second spray unit are sequentially communicated setting, are sent into described second after weak solution is filtered quenched and heat exchange
Spray unit；
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, second heat exchanger, third heat exchanger and the 4th
Heat exchanger is sequentially communicated, so that heat supply network water or low pressure condensation water pass sequentially through second heat exchanger, third heat exchanger and
Four heat exchangers, and exchange heat to the substance entered in corresponding heat exchanger；
6th heat exchanger is connected to the third heat exchanger and/or the 4th heat exchanger, by the 6th heat exchanger
Pumping condensed water be sent into the third heat exchanger and/or the heat exchange of the 4th heat exchanger after, back boiler water supply the described 6th will exchange heat
After the secondary steam condensed water of device is sent into the 4th heat exchanger and/or the heat exchange of third heat exchanger, water is supplemented as technique；
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
Be connected to chimney, first spray unit and second spray unit be respectively positioned on the gas inlet and exhanst gas outlet it
Between；
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 the second circulation circuit.
It should be noted that " spray disappears white " refers to through the side by spray-absorption liquid and/or clear water in the present invention
Formula, the heat in recovered flue gas, and eliminate white cigarette phenomenon.
Technical solution of the present invention has the advantages that
1, provided by the invention to spray the white device that disappears, by the way that at least one level second circulation circuit is arranged, and refrigeration is set
Device, in the fluid direction of motion along second circulation circuit, the liquid feeding end of refrigerating plant and the second circulation circuit of upstream connect
It is logical, the liquid of absorption plant lower part is sent into refrigerating plant, the outlet end of refrigerating plant and the second circulation circuit in downstream connect
Logical, the liquid after freezing is sent into absorption plant.The second heat exchanger of at least one level is set on second circulation circuit simultaneously, and
Liquid feeding end and outlet end positioned at refrigerating plant is respectively between the tie point in second circulation circuit, in practical work process,
Flue gas enters the concentrated solution (such as dense saline solution) or clear water counter current contacting with absorption plant top spray from the bottom of absorption plant,
In heating season, moisture is thinning in concentrated solution absorption flue gas, is precipitated in moisture phase transition process and discharges latent heat, heats flue gas and salt is molten
Liquid, solution after heating is by the second heat exchanger on second circulation circuit or refrigerating plant heat exchange, using taking away heat
Flexible in size controls the equilibrium state in absorption plant；In non-heating season, other than using concentrated solution, also sprayed using clear water
Leaching carrys out cooled flue gas, and saturation neat stress cooling bleed, to reach water lift effect, the water after heating can pass through the second heat exchanger
Or after refrigerating plant heat exchange, recycling.Recycled eventually by above-mentioned means depth and be utilized former flue gas sensible heat and
The latent heat of neat stress water vapour avoids the condensation of prior art flue gas cool-down from needing a large amount of cold sources, water resource is greatly saved.Simultaneously
Moisture in neat stress has been recycled, systematic running cost has been reduced and uses, coal-burning power plant has been solved or other industry eliminates coloured plume, depth
Water pumping system, which is only put into, does not have the problem of income, reaches the environment protectings such as efficient energy-saving and emission-reducing, has society well and economy
It influences.
2, provided by the invention to spray the white device that disappears, the aqueous of neat stress is greatly lowered first with absorption plant
Rate, steam in by concentrated solution absorption process since phase transformation discharges latent heat, can so that the mass dryness fraction and temperature of neat stress are improved
Reach simultaneously and eliminates that coloured plume, depth water lift, water vapour is low-quality latent in the dustiness for reducing neat stress and recycling neat stress
The effect of heat；Then the concentrated solution after absorbing vapor in absorption plant becomes weak solution, and a part passes through the in weak solution
The cooling of five heat exchangers, then restored by regenerative system to original content, it finally returns to absorption plant；Another part passes through second
Heat exchanger heats heat transferring medium (such as hot net water), returns again to absorption plant, and two strands of uninterrupteds are adjusted according to specific requirement,
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 dilute molten in regenerative system
Liquid, which is exchanged heat by saturated vapor or the steam turbine pumping generated with regenerative system and enters flash regeneration in flash tank, becomes concentrated solution,
It is transported in absorption plant again, regenerative process is utilized the saturation generated after the compression of the secondary steam at the top of regenerative system and steams
Vapour, the saturated vapor for discharging latent heat become secondary steam condensed water, the secondary steam condensed water be again introduced into the 4th heat exchanger with
Hot net water heat exchange, the condensed water after cooling can be used for desulfurizer mist eliminator flushing water or as technique supplement water etc., reduce
Cost and energy consumption.It avoids regeneration using power plant steam, can effectively reduce steam consumption.
3, spray provided by the invention disappears white device, regenerative system heating season using steam turbine pumping come steam pumping, as
Regenerative drives heat source, pumping condensed water is after the heat exchange of third heat exchanger, back boiler water supply；Non- heating season is using compressor+full
With device+flash column secondary steam, the saturated vapor generated after compression, condensed water is used for the moisturizing of desulfurizer technique, or adopts
It is sprayed with clear water or the combination of the two.Hot net water or low pressure condensation water are exchanged heat by the second heat exchanger of absorption plant to be risen
It temperature and then exchanges heat with the third heat exchanger of regenerative system and the 4th heat exchanger, heating season reaches hot net water temperature requirement, heats
Ji Huire net；Non- heating season go it is low plus or go low-level (stack-gas) economizer exchange heat after go again it is low plus, can be used for heating low pressure condensation water, make non-
Heating season unit generation ability is unaffected.Coal-burning power plant is solved in the above manner or other industry eliminates wet plume, depth
Water pumping system, which is only put into, does not have the problem of income, further recycles desulfurizer by compressor+saturator+flash distillation Tower System
The latent heat of neat stress water vapour afterwards recycles moisture in neat stress, reduces systematic running cost and uses, reaches the rings such as efficient energy-saving and emission-reduction
Protect effect.
4, spray provided by the invention disappears white device, not only former obvious heat of smoke can be used to heat hot net water or it is low plus
Condensed water, can also a large amount of latent heat of water vapour in recovered flue gas simultaneously, depth Mist heat recovering, during recycling latent heat
Flue-gas temperature raises simultaneously, and can reduce flue gas moisture content simultaneously and improve flue-gas temperature, and it is coloured to reach recycling latent heat collaboration elimination
Plume and reduction dust content effect.The device recycles saving water resource by depth water lift, due to system equipment letter
It is single, system operation pressure drop about one third can be reduced compared with presently relevant technology, save operating cost, there is environmental protection well
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 that the white device that disappears is sprayed 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-；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- third pump；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；20- solution supplements tank；21- the 5th is pumped；22- refrigerating plant；23- the 6th
Pump；24- device for storing liquid；25- 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 is present embodiments provided to disappear white device, as illustrated in fig. 1 and 2, the dedusting including being sequentially communicated setting
Device 1, desulfurizer 2 and absorption plant 3, if dust-extraction unit 1 can be electric precipitator, desulfurizer 2 can be desulfurizing tower, absorb dress
Setting 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, absorption plant
Gas inlet is arranged in 3 lower part, and top is arranged exhanst gas outlet, further includes,
The liquid feeding end at least one level second circulation circuit, second circulation circuit is connected to the lower part of absorption plant 3, outlet end
Be connected to the top of absorption plant 3 so that the liquid of outlet end enters in absorption plant 3, and with the cigarette that enters in absorption plant 3
Gas countercurrent contact；In the present embodiment, as shown in Figure 1, second circulation circuit is two-stage；
Refrigerating plant 22, in the fluid direction of motion in second circulation circuit, the liquid feeding end of refrigerating plant 22 and upstream
The liquid of 3 lower part of absorption plant is sent into refrigerating plant 22 by second circulation circuit communication, and the outlet end of refrigerating plant 22 is under
The second circulation circuit communication of trip, the liquid after freezing are sent into absorption plant 3；In the present embodiment, refrigerating plant 22 is
Cooling tower or enclosed induced cooling tower；
The second heat exchanger of at least one level 9, is set on second circulation circuit, and is located at the liquid feeding end of refrigerating plant 22 and goes out
Liquid end is respectively between the tie point in second circulation circuit；In the present embodiment, the second heat exchanger 9 is two-stage, with second circulation
Circuit corresponds；Second heat exchanger 9 is plate heat exchanger；The outlet end of refrigerating plant 22 is connected to the second heat exchanger 9, will
Recirculated cooling water exchanges heat in the second heat exchanger 9 with the liquid from 3 lower part of absorption plant.
Above-mentioned spray disappears in white device, by the way that at least one level second circulation circuit is arranged, and refrigerating plant is arranged, on edge
In the fluid direction of motion in second circulation circuit, the liquid feeding end of refrigerating plant and the second circulation circuit communication of upstream will inhale
The liquid of receiving apparatus lower part is sent into refrigerating plant, the outlet end of refrigerating plant and the second circulation circuit communication in downstream, will make
Liquid after cold is sent into absorption plant.The second heat exchanger of at least one level is set on second circulation circuit simultaneously, and is located at refrigeration
The liquid feeding end and outlet end of device are respectively between the tie point in second circulation circuit, and in practical work process, flue gas is from suction
The bottom of receiving apparatus enters the concentrated solution (such as dense saline solution) or clear water counter current contacting with absorption plant top spray, in heating season
When, it is thinning that concentrated solution absorbs moisture in flue gas, is precipitated in moisture phase transition process and discharges latent heat, heats flue gas and salting liquid, heating
Solution afterwards passes through the second heat exchanger or refrigerating plant heat exchange on second circulation circuit, utilizes the flexible in size for taking away heat
Control the equilibrium state in absorption plant；In non-heating season, other than using concentrated solution, can also be sprayed using clear water to cool down
Flue gas, saturation neat stress cooling bleed, to reach water lift effect, the water after heating can pass through the second heat exchanger or refrigeration
After device heat exchange, recycling.The sensible heat and neat stress water of former flue gas are recycled and are utilized eventually by above-mentioned means depth
Latent heat of the steam avoids the condensation of prior art flue gas cool-down from needing a large amount of cold sources, water resource is greatly saved.It has recycled simultaneously net
Moisture in flue gas reduces systematic running cost and uses, and solves coal-burning power plant or other industry eliminates coloured plume, depth water pumping system
Only investment does not have the problem of income, reaches the environment protectings such as efficient energy-saving and emission-reducing, has good social and economic effect.
It further, further include first circulation circuit, liquid feeding end is connected to the lower part of absorption plant 3, outlet end and suction
The top of receiving apparatus 3 is connected to；
First spray unit 3-1, the top close to absorption plant 3 are arranged in it, the first spray unit 3-1 and first circulation
The outlet end in circuit is connected to；It specifically, is in the present embodiment 1 as shown in Fig. 2, the first spray unit 3-1 is 1-2, when
When being two, it is divided into upper layer and lower layer spraying layer, preferably two layers；
At least one level the second spray unit 3-2 is arranged in it close to the top of absorption plant 3, the second spray unit 3-2 with
The outlet end in second circulation circuit is connected to；Specifically, the second spray unit 3-2 is 2-4, is in the present embodiment two, point
For upper layer and lower layer spraying layer, preferably three layers.
In addition, the specific setting quantity of the first spray unit 3-1 and the second spray unit 3-2 can determine according to project exhaust gas volumn
Fixed, heat exchanger or circulating pump is separately provided in each circulation loop, and spare to the progress of dynamic equipment according to related specifications.Under desulfurizing tower
Section bottom solution is divided into three parts: first part is responsible for system regeneration by first circulation circuit (outer circulation)；Second part is logical
Second circulation circuit (interior circulation) is crossed to be responsible for maintaining absorption system equilibrium state；Third portion part enters solution and filters quenched list
On the one hand member can remove solution by cyclone+filter device and absorb in the quenched unit of absorption tower lower section bottom ancillary filter
The substances such as the solid particulate matter accumulated in tower and the crystal salt of generation (sulfate, carbonate etc.), make the pollution of absorption tower solution
Object and Control of Impurities are to a certain degree；On the other hand calcium base salt is added, adjusts the pH of solution, keeps the absorbability of solution, together
When reduce solution corrosivity.Absorbing liquid enters at the top of the absorption tower, by uniformly spray with enter from absorb the bottom of the tower it is net
Flue gas reverse convection, water vapour is absorbed by concentrated solution in neat stress, upper section and the settable spare level of the respective spraying layer of lower section, with
Improve the reliability on absorption tower.It can control the water absorbing capacity of unit mass salting liquid by adjusting absorption tower lower section partial circulating amount of solution
Power arranges absorption tower after desulfurizing tower, and since absorb the bottom of the tower flue gas moisture content is high, most of water suction occurs in this section,
Partial circulating is set in absorb the bottom of the tower, absorption tower lower section equilibrium temperature is controlled by reducing partial circulating solution temperature, to improve
The water absorbing capacity of unit mass solution, the weak solution concentration after absorption reduce 1%-10%, partial circulating internal circulating load with respect to concentrated solution
The ratio of (second circulation circuit) and regeneration cycle amount (first circulation circuit) can be in 1:1-10:1.
Specifically, the first spray unit 3-1 and the second spray unit 3-2 includes that spray conduit and interval are arranged on
Spray nozzle, and the first spray unit 3-1 and the second spray unit 3-2 are close to the exhanst gas outlet of absorption plant 3 and are located under it
Side, in this way extension counter current contacting distance, can heat in effective recovered flue gas.
It further, further include water storage device 25, and second circulation circuit communication, and water storage device 25 and second circulation are returned
The tie point on road is close to the lower part of absorption plant 3, in non-heating season, the water in water storage device 25 to be sent into absorption plant 3
Carry out the circulated sprinkling of flue gas；Water in absorption plant 3 is stored in water storage device 25 by heating season；Specifically, water storage device
25 be filtered water tank；
Device for storing liquid 24, and first circulation circuit communication, and device for storing liquid 24 and the tie point in first circulation circuit are close
The lower part of absorption plant 3, in non-heating season, the absorbing liquid in absorption plant 3 to be stored in device for storing liquid 24；Heating season,
Absorbing liquid in device for storing liquid 24 is sent into absorption plant 3.
Further, as shown in figure 3, further including regenerative system, regenerative system includes flash tank 18, and middle part setting is dilute molten
Steam (vapor) outlet is arranged in liquid import, top, and lower part is arranged concentrated solution and exports；6th heat exchanger 17, the lower part of absorption plant 3, the 6th
Heat exchanger 17 and dilute solution inlet are sequentially communicated；Compressor 15 and saturator 16, steam (vapor) outlet, compressor 15,16 and of saturator
6th heat exchanger 17 is sequentially communicated, so that after weak solution and secondary steam exchange heat in the 6th heat exchanger 17, into flash distillation
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.
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.Non- heating
Ji Ze cuts off regenerative system, by utilizing cooling tower or the recirculated cooling water of enclosed induced cooling tower manufacture on absorption tower
Middle carry out spraying cooling, to realize that the non-heating season of power plant eliminates wet plume environmental requirement.Shower water can directly remove cooling tower or machine
Power ventilating and cooling tower cooler, can also by the second heat exchanger and cooling tower or induced cooling tower come refrigerant change indirectly
Heat.Regenerative system can also be used to flue gas water lift in certain non-heating season, and secondary steam excludes to enter compressor from regenerator overhead,
Become superheated steam through heating, become saturated vapor by spray, as regenerative system driving heat source, after discharging latent heat
Become condensed water, which exchanges heat with hot net water again, hot net water (low pressure condensation water) can be heated to 60 DEG C or so, cooling
Condensed water afterwards can be used for mist eliminator flushing water etc. in desulfurizing tower.By such method of operation can make non-heating season air exhaust energy consumption with
Recycling energy consumption is almost cancelled out each other, and is not had a negative impact to unit generation ability.
In addition, further including the 5th heat exchanger 13, it is set on first circulation circuit, the lower part of absorption plant 3, the 5th heat exchange
Device 13, the 6th heat exchanger 17 and dilute solution inlet are sequentially communicated, by absorbing tower bottom solution in the 5th heat exchanger 13 and next
The concentrated solution heat exchange exported from the concentrated solution of flash tank, then after the heat exchange of the 6th heat exchanger 17, finally it is sent into flash tank 18；5th
Heat exchanger 13 can be plate heat exchanger；
First Heat Exchanger 8 is also set up, the concentrated solution come out out of the 5th heat exchanger 13 can enter First Heat Exchanger 8 and heat supply network
After water or the heat exchange of low plus condensed water, absorption plant 3 is entered back into.
Embodiment 2
It present embodiments provides a kind of spray to disappear white device, on the basis of above-described embodiment 1, in order to absorption plant
Concentrated solution in 3 as absorbing liquid is filtered and modulates, further include solution filtering tempering system 7, the lower part of absorption plant 3,
Solution filtering tempering system 7, the second heat exchanger 9 and the second spray unit 3-2 are sequentially communicated setting, and weak solution is adjusted through filtering
The second spray unit 3-2 is sent into after matter and heat exchange；Specifically, solution filtering tempering system 7 is by cyclone+filtering for being sequentially communicated
Device composition, while the solution supplement tank 21 and the 5th pump 22 that setting is sequentially communicated, the 5th pump 22 connect with solution filtering tempering system 7
It is logical, with make-up solution into it.
Embodiment 3
Present embodiments providing a kind of spray white device that disappears further includes third on the basis of above-described embodiment 1 or 2
Heat exchanger 10 and the 4th heat exchanger 11, the second heat exchanger 9, third heat exchanger 10 and the 4th heat exchanger 11 are sequentially communicated, so that hot
Net water or low pressure condensation water pass sequentially through the second heat exchanger 9, third heat exchanger 10 and the 4th heat exchanger 11, and corresponding to entering
Substance in heat exchanger exchanges heat；
Further, the 6th heat exchanger 17 is connected to third heat exchanger 10 and/or the 4th heat exchanger 11, by the 6th heat exchange
After the pumping condensed water of device 17 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 exchange
After the secondary steam condensed water of device 17 is sent into the 4th heat exchanger 11 and/or the heat exchange of third heat exchanger 10, water is supplemented as technique；It steams
Vapor 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；
6th pump 23 of both setting connections between the outlet end and second circulation circuit of refrigerating plant 22.
Embodiment 4
Present embodiments providing a kind of spray white device that disappears further includes province on the basis of above-described embodiment 1,2 or 3
Coal device 4, is set between dust-extraction unit 1 and desulfurizer 2 or between air preheater and dust-extraction unit 1, the 4th heat exchanger 11 with
Economizer 4 is connected to, and condensed water is exchanged heat in economizer 3-6 with the flue gas from dust-extraction unit 1, and by the flue gas after heat exchange
It is sent into desulfurizer 2.
Further, gas inlet is arranged in the lower part of absorption plant 3, and exhanst gas outlet, exhanst gas outlet and chimney is arranged in top
19 connections, the first spray unit 3-1 and the second spray unit 3-2 are respectively positioned between gas inlet and exhanst gas outlet；Demister is set
It is placed in absorption plant, and between the first spray unit 3-1 and exhanst gas outlet.
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:
The absorbing liquid at absorption tower bottom is discharged into device for storing liquid 24 with third pump 12 completely, uses circulating pump later by non-heating season
Clear water is imported into absorption tower from water storage device 25, water storage device 25 is closed after having certain liquid level in absorption tower, utilizes first
Absorb the bottom of the tower clear water is sent to tower top and is sprayed by pump 5, and temperature increases after mass-and heat-transfer in absorption tower for shower water and flue gas, is coagulated
It bears water and enters recirculated cooling water, it is cooling that the cooling water after absorb the bottom of the tower heating is sent to refrigerating plant 22.Refrigerating plant 22 is adopted
With cooling tower or enclosed induced cooling tower, the recirculated cooling water after heating can be sent directly to cooling tower or enclosed machine power is logical
Cooling Tower, the water got back in cooling tower are taken away by air, and enclosed induced cooling tower cannot evaporate it is extra
Condensed water excludes excessive moisture before entering enclosed induced cooling tower, remaining to enter back into induced cooling tower；When
So, the recirculated cooling water after heating can be exchanged heat by the second heat exchanger, and the refrigerant of the second heat exchanger comes from cooling tower or enclosed machine
The cooling water of power aerating and cooling tower, the tower bottom recirculated cooling water equally to heat up are also required to exclude condensation before entering the second heat exchanger
Water.
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)
- White device, including absorption plant 1. a kind of spray disappears, which is characterized in that further include,The liquid feeding end at least one level second circulation circuit, the second circulation circuit is connected to the lower part of the absorption plant, out Liquid end is connected to the top of the absorption plant so that the liquid of the outlet end enter the absorption plant in, and with entrance Flue gas adverse current contact in the absorption plant；Refrigerating plant, in the fluid direction of motion in the second circulation circuit, the liquid feeding end of the refrigerating plant and upstream The liquid of the absorption plant lower part is sent into the refrigerating plant by second circulation circuit communication, and the refrigerating plant goes out The second circulation circuit communication at liquid end and downstream, the liquid after freezing are sent into the absorption plant；The second heat exchanger of at least one level is set on the second circulation circuit, and be located at the refrigerating plant liquid feeding end and Outlet end is respectively between the tie point in the second circulation circuit.
- 2. the apparatus according to claim 1, which is characterized in that the outlet end of the refrigerating plant and second heat exchanger Connection, recirculated cooling water is exchanged heat in second heat exchanger with the liquid from the absorption plant lower part.
- 3. device according to claim 1 or 2, which is characterized in that further include first circulation circuit, liquid feeding end with it is described The lower part of absorption plant is connected to, and outlet end is connected to the top of the absorption plant；First spray unit, the top close to the absorption plant are arranged in it, and first spray unit is followed with described first The outlet end of loop back path is connected to；The second spray unit of at least one level, the top close to the absorption plant are arranged in it, second spray unit and institute State the outlet end connection in second circulation circuit.
- 4. device according to claim 3, which is characterized in that further include,Water storage device, and the second circulation circuit communication, and the tie point of the water storage device and the second circulation circuit Close to the lower part of the absorption plant, in non-heating season, by the water in the water storage device be sent into the absorption plant into The circulated sprinkling of row flue gas；Water in the absorption plant is stored in the water storage device by heating season；Device for storing liquid, and the first circulation circuit communication, and the tie point of the device for storing liquid and the first circulation circuit Close to the lower part of the absorption plant, the absorbing liquid in the absorption plant is stored in the liquid storage and is filled in non-heating season In setting；Absorbing liquid in the device for storing liquid is sent into the absorption plant by heating season.
- 5. device according to claim 4, which is characterized in that further include regenerative system, the regenerative system is set to institute It states on first circulation circuit, 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, in heating season After the weak solution of the absorption plant lower part and secondary steam are exchanged heat in the 6th heat exchanger, into the flash distillation Tank.
- 6. device according to claim 5, which is characterized in that further include the 5th heat exchanger, be set to the first circulation On circuit, 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.
- 7. device according to claim 6, which is characterized in that further include solution filtering tempering system, the absorption plant Lower part, solution filtering tempering system, the second heat exchanger and the second spray unit be sequentially communicated setting, by weak solution through filtering Second spray unit is sent into after 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.
- 8. device according to claim 7, which is characterized in that further include,Third heat exchanger and the 4th heat exchanger, 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 second heat exchanger, third heat exchanger and the 4th heat exchanger, and with enter phase The substance in heat exchanger is answered to exchange heat；6th heat exchanger is connected to the third heat exchanger and/or the 4th heat exchanger, by the pumping of the 6th heat exchanger After the condensate that is gas-cooled is sent into the third heat exchanger and/or the heat exchange of the 4th heat exchanger, back boiler water supply, by the 6th heat exchanger After secondary steam condensed water is sent into the 4th heat exchanger and/or 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. device 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 device according to any one of claim 3-9, which is characterized in that cigarette is arranged in the lower part of the absorption plant Exhanst gas outlet is arranged in gas import, top, and the exhanst gas outlet is connected to chimney, first spray unit and second spray Unit is 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.
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| CN110407384A (en) * | 2019-07-10 | 2019-11-05 | 中国华电科工集团有限公司 | A kind of waste heat recycles the device for the white joint wastewater treatment that disappears |
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| CN109395539B (en) | 2023-11-07 |
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