CN108970370A - It is a kind of low cost flue gas device for deep cleaning and its purification receive water eliminating white smoke technique - Google Patents
It is a kind of low cost flue gas device for deep cleaning and its purification receive water eliminating white smoke technique Download PDFInfo
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- CN108970370A CN108970370A CN201811171922.3A CN201811171922A CN108970370A CN 108970370 A CN108970370 A CN 108970370A CN 201811171922 A CN201811171922 A CN 201811171922A CN 108970370 A CN108970370 A CN 108970370A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000003546 flue gas Substances 0.000 title claims abstract description 118
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000779 smoke Substances 0.000 title claims abstract description 20
- 238000004140 cleaning Methods 0.000 title claims abstract description 17
- 238000000746 purification Methods 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 83
- 238000001816 cooling Methods 0.000 claims abstract description 53
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 42
- 230000023556 desulfurization Effects 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 32
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 21
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims abstract description 17
- 239000002826 coolant Substances 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 230000018044 dehydration Effects 0.000 claims abstract description 6
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000009833 condensation Methods 0.000 claims description 14
- 230000005494 condensation Effects 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 8
- 239000003517 fume Substances 0.000 claims description 7
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- 239000013618 particulate matter Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 239000000356 contaminant Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 238000004581 coalescence Methods 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 description 7
- 238000005457 optimization Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- -1 body Substances 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000010148 water-pollination Effects 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- 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
- B01D53/002—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 condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
- 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
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of inexpensive flue gas device for deep cleaning and its purification to receive water eliminating white smoke technique, purification device includes desulfurizing tower, desulfurization spray unit, cooling condenser, demisting dehydration layer, first outlet heat exchanger, second outlet heat exchanger are successively arranged in desulfurizing tower, enter cigarette channel to be connected with into chimney heat exchanger, desulfurizing tower is externally provided with heat exchange liquid surge tank, heat exchange liquid circulating pump, circulation fluid cooling tower, coolant recirculation pump.The present invention is by cooling down to flue gas, condensing, coalescence, and moisture realizes multi-pollutant deep purifying simultaneously in recovered flue gas；After off-gas recovery moisture, flue gas specific heat decline, the exiting flue gas white required heat exchange energy consumption that disappears is reduced, and is saved exiting flue gas and is disappeared white heat exchange energy consumption and cost；It is condensed and is cooled down using gas approach, reduce flue gas volume, improve gas residence time in tower, improve desulfurization column efficiency and reduce system operation energy consumption；Exiting flue gas heat exchange and heat exchanger self-cleaning technique solve fouling of heat exchangers, blocking problem.
Description
Technical field
The present invention relates to a kind of chemical industry and environmental technology field, especially a kind of inexpensive flue gas device for deep cleaning and its
Water eliminating white smoke technique is received in purification.
Background technique
Contain large quantity of moisture after Desulphurization for Coal-fired Power Plant in wet flue gas, every kilogram of dry flue gas water capacity about 80g in flue gas, and about
70% thermal energy is discharged in the form of vapor latent heat, and the saturated flue gas of desulphurization system outlet is discharged into the ambient air of lower temperature
Afterwards, after reaching supersaturated wet flue gas after flue gas is cooling, water mist starts to be precipitated, to generate " white plume ".After wet desulphurization
" white plume " discharges a large amount of vapor into air, causes water resource waste.In addition, remaining sour gas in desulfidation tail gas
The multiple pollutants such as body, dust particle, dissolubility salt, slurries droplet can not quickly expand because " white plume " density is higher
It dissipates, is enriched near desulfurizer, seriously endanger near power station region environment.Therefore, power plant's water consume how is effectively reduced
And flue gas loss, and chimney corrosion and " white cigarette " phenomenon are fundamentally solved, it is that an emphasis of Desulphurization for Coal-fired Power Plant system is ground
Study carefully direction.
Currently, eliminate wet desulphurization tail gas " white plume " be all made of heating flue gas method, by temperature after desulfurization be 45~
60 DEG C of flue gas makes dew-point temperature of the flue gas far from water to 70~80 DEG C, and guarantees flue gas in the still appropriate mistake of chimney breast
Heat can effectively weaken the corrosion of back-end ductwork and chimney.Improving flue-gas temperature enhances plume rise, diffusion effect, makes flue gas
After chimney is discharged, abundant dilution can be realized, to weaken " gypsum rain " phenomenon around chimney.By flue gas reheat come
Prevent appearing in for " white plume " theoretically feasible, however, the formation of plume is highly dependent on meteorological condition.
Heating flue gas method disappears, and there are following problems for white technique: 1, carrying out only by desulphurization system absorption tower exiting flue gas
Reheating can improve atmosphere hoist height and range of scatter to a certain extent, reduce chimney " white plume " and power plant periphery
The formation of " gypsum rain ", but the concentration of emission of pollutant and total emission volumn do not change in desulfidation tail gas, are unable to generation environment effect
Benefit；2, the flue gas after desulfurization is high humidity saturated flue gas, and flue gas specific heat is larger, eliminates " white cigarette using flue gas mode is directly heated
Plumage ", need to be even higher by 20-30 DEG C of smoke temperature promotion, and energy consumption is larger, and unit coal consumption rises at least 2 grams/kilowatt hour, operation cost
It is high；3, heat exchanger end portion is contacted with wet flue gas, the perishable heat exchanger of remaining acid gas in flue gas, heat exchanger upper end
Point, the particulate matter after being evaporated is easy bonding, blocking heat exchanger, and heat exchanger service life is short, it is difficult to operation steady in a long-term.
Summary of the invention
The object of the invention is to it is net to provide a kind of inexpensive flue gas depth in order to solve the shortcoming in background technique
Makeup, which is set and its purified, receives water eliminating white smoke technique.
In order to achieve the above objectives, the present invention adopts the following technical scheme: a kind of low cost flue gas device for deep cleaning, including
Desulfurizing tower, as desulfurization stock tank, the tower wall of desulfurization stock tank upper side desulfurizing tower is equipped with logical into cigarette the bottom space of desulfurizing tower
Road, the upper end side be equipped with outlet flue, it is characterized in that: be successively arranged from bottom to up in desulfurizing tower desulfurization spray unit, cooling it is cold
Condenser, demisting are dehydrated layer, first outlet heat exchanger, second outlet heat exchanger, enter and are connected on the pipeline of cigarette channel into cigarette
Road heat exchanger, desulfurizing tower are externally provided with heat exchange liquid surge tank, heat exchange liquid circulating pump, circulation fluid cooling tower, coolant recirculation pump, circulation
The bottom side of liquid cooling tower enters liquid with the first of cooling condenser respectively by being serially connected with the circulation line of coolant recirculation pump
Mouthful, the connection of the second liquid inlet of first outlet heat exchanger, the second of the first liquid outlet of the condenser that cools down, first outlet heat exchanger
Liquid outlet passes through pipeline respectively and is connected to connection with the liquid return hole of circulation fluid cooling tower；The liquid outlet of heat exchange liquid surge tank passes through concatenation
There is the pipeline of heat exchange liquid circulating pump to be connected to connection with the liquid inlet of chimney heat exchanger, the liquid outlet of chimney heat exchanger passes through pipeline point
It is not connected to the second heat transferring medium entrance of the first heat transferring medium entrance of first outlet heat exchanger, second outlet heat exchanger
It connects, the first heat transferring medium outlet of first outlet heat exchanger, the second heat transferring medium outlet of second outlet heat exchanger pass through respectively
Pipeline is connected to connection with the liquid return hole of heat exchange liquid surge tank.
For a kind of optimization of the invention, the desulfurization spray unit for liquid interface by being serially connected with slurry circulating pump
Pipeline is connected to connection with desulfurization stock tank.
For a kind of optimization of the invention, the second liquid inlet of first outlet heat exchanger, the second liquid outlet, the first heat exchange are situated between
It is provided on the pipeline that matter entrance, the second heat transferring medium entrance, the outlet of the first heat transferring medium, the outlet of the second heat transferring medium connect
Control valve.
For a kind of optimization of the invention, on the circulation line between coolant recirculation pump and the liquid inlet for the condenser that cools down
It is provided with control valve.
For a kind of optimization of the invention, the interlamellar spacing between first outlet heat exchanger and second outlet heat exchanger is
0.5m-2m。
A kind of low cost flue gas deep purifying receipts water eliminating white smoke technique, it is characterised in that comprise the technical steps that: coal-fired
Flue gas enters in desulfurizing tower after the heat exchange cooling of gas approach heat exchanger, the recycle slurry of flue gas and desulfurization spray unit after cooling
Liquid forms high-humidity gas fume after completing wet desulphurization；The high-humidity gas fume for completing desulfurization successively passes through cooling condenser, demisting is dehydrated layer,
First outlet heat exchanger, second outlet heat exchanger complete flue gas condensing, receive water drying and heating eliminating white smoke, it may be assumed that are saturated after desulfurization
Flue gas is upwardly into cooling condenser and cooling spray liquid carries out reverse contact heat-exchanging, and flue-gas temperature drops to 30-45 DEG C, and water steams
Gas and remaining acid gas are condensed into liquid droplet using slurries droplet, soluble-salt droplet, ultrafine dust particulate matter as the nuclei of condensation,
Realize the deep purifying of residual contaminants in flue gas；Complete cooling condensation flue gas continue up flow into demisting be dehydrated layer into
Row dehydrates, the condensed water in recovered flue gas；Low-temperature heat exchange medium is sent from heat exchange liquid surge tank to entering by heat exchange liquid circulating pump
Mouth chimney heat exchanger, carries out heat exchange heating with high-temperature flue gas, and the high temperature heat exchange medium for completing heating enters outlet heat exchanger, to complete
Heat exchange heating is carried out at the low-temperature flue gas of condensation demisting, realizes flue gas eliminating white smoke, the low-temperature heat exchange after completing flue gas heating heat exchange
Medium enters heat exchange liquid surge tank and continues cycling through use.
For a kind of optimization of the invention, with the operation of device, when first outlet heat exchanger resistance rises, the is closed
Control valve on the heat transferring medium entrance of one outlet heat exchanger, the pipeline of heat transferring medium outlet connection, opens first outlet and changes
Control valve on second liquid inlet of hot device, the second liquid outlet connecting line carries out flue gas using first outlet heat exchanger
Indirect condensing carries out self-cleaning to first outlet heat exchanger using condensed water.
For a kind of optimization of the invention, the condensed water of recycling enters circulation fluid cooling tower with circulating cooling liquid discharge tower outside
Cooling down is carried out, a part is used as desulfurization stock tank water, and a part is used as coolant liquid, is sent by coolant recirculation pump cold to cooling down
Condenser is recycled.
Compared with the background technology, the present invention, comprising:
1) present invention cooled down using circulating cooling liquid directly condenses in such a way that flue gas, condensed, coalescence, recycling cigarette
Moisture realizes multi-pollutant deep purifying simultaneously in gas；Meanwhile after off-gas recovery moisture, flue gas specific heat decline, when identical heating
Heat exchange area becomes smaller, and the exiting flue gas white required heat exchange energy consumption that disappears reduces, and saves exiting flue gas and disappears white heat exchange energy consumption and cost；
2) present invention is reduced flue gas volume, is improved gas residence time in tower, substantially mentioned using gas approach condensation cooling
High desulfurization column efficiency simultaneously reduces system operation energy consumption；
3) present invention solves fouling of heat exchangers, blocking using the heat exchange of multisection type exiting flue gas and heat exchanger self-cleaning technique
Problem reduces the operating cost of heat exchanger；Meanwhile flue gas is after outlet heat exchanger bottom completes evaporation, the corrosivity of flue gas compared with
It is small, the material requirement on outlet heat exchanger upper layer can be reduced, investment, the operating cost of heat exchanger are reduced；
4) present invention is by entrance cooling high-temperature fume, and will absorb heat and heat up heat source as condensed flue gas,
Flue gas disappear white process without external heat source, it can be achieved that flue gas low cost eliminating white smoke.
Detailed description of the invention
Fig. 1 is the theory structure schematic diagram of inexpensive flue gas device for deep cleaning.
Specific embodiment
Embodiment 1: referring to Fig.1.A kind of low cost flue gas device for deep cleaning, including desulfurizing tower 1, the bottom of desulfurizing tower 1
Space is equipped with as desulfurization stock tank 11, the tower wall of 11 upper side desulfurizing tower 1 of desulfurization stock tank into cigarette channel 12, the upper end side
Be successively arranged from bottom to up equipped with outlet flue 13, in desulfurizing tower 1 desulfurization spray unit 3, cooling condenser 4, demisting dehydration layer 5,
First outlet heat exchanger 61, second outlet heat exchanger 62 enter and are connected on the pipeline of cigarette channel 12 into chimney heat exchanger 2,
Desulfurizing tower 1 is externally provided with heat exchange liquid surge tank 7, heat exchange liquid circulating pump 8, circulation fluid cooling tower 9, coolant recirculation pump 10, circulation fluid
The bottom side of cooling tower 9 is by being serially connected with the circulation line 14 of coolant recirculation pump 10 first respectively with cooling condenser 4
Second liquid inlet 6f connection of liquid inlet 42, first outlet heat exchanger 61, the first liquid outlet 41 of condenser 4 that cools down, first go out
Second liquid outlet 6e of mouth heat exchanger 61 passes through pipeline respectively and is connected to connection with the liquid return hole 91 of circulation fluid cooling tower 9；Exchange heat liquid
The liquid outlet of surge tank 7 is connected to connection, cigarette with the liquid inlet of chimney heat exchanger 2 by being serially connected with the pipeline of heat exchange liquid circulating pump 8
The liquid outlet of road heat exchanger 2 by pipeline respectively with the first heat transferring medium entrance 6a of first outlet heat exchanger 61, second outlet
Second heat transferring medium entrance 6b of heat exchanger 62 is connected to connection, the first heat transferring medium outlet 6c of first outlet heat exchanger 61, the
The second heat transferring medium outlet 6d of two outlet heat exchangers 62 passes through pipeline respectively and is connected to the liquid return hole 71 for the liquid surge tank 7 that exchanges heat
It connects.
The desulfurization spray unit 3 for liquid interface 31 by be serially connected with slurry circulating pump 15 pipeline and desulfurization stock tank 11
Connection connection.The second liquid inlet 6f, the second liquid outlet 6e, the first heat transferring medium entrance 6a, second of first outlet heat exchanger 61
Heat transferring medium entrance 6b, the first heat transferring medium outlet 6c, the second heat transferring medium outlet 6d connection pipeline on be provided with control
Valve 16.Control valve 17 is provided on circulation line 14 between coolant recirculation pump 10 and the liquid inlet 42 for the condenser 4 that cools down.
Interlamellar spacing between first outlet heat exchanger 61 and second outlet heat exchanger 62 is 0.5m-2m.
Embodiment 2: referring to Fig.1.A kind of low cost flue gas deep purifying receipts water eliminating white smoke technique, including following technique step
Rapid: coal-fired flue-gas enters in desulfurizing tower 1 after the heat exchange cooling of gas approach heat exchanger 2, and the flue gas and desulfurization spray after cooling are single
The loop slurry of member 2 forms high-humidity gas fume after completing wet desulphurization；The high-humidity gas fume of desulfurization is completed successively by cooling condenser
4, demisting dehydration layer 5, first outlet heat exchanger 61, second outlet heat exchanger 62 complete flue gas condensing, the drying of receipts water and heat up to disappear
White cigarette, it may be assumed that saturated flue gas is upwardly into cooling condenser 4 after desulfurization and cooling spray liquid carries out reverse contact heat-exchanging, flue gas temperature
Degree drops to 30-45 DEG C, and vapor and remaining acid gas are with slurries droplet, soluble-salt droplet, ultrafine dust particulate matter
The nuclei of condensation are condensed into liquid droplet, realize the deep purifying of residual contaminants in flue gas；Complete cooling condensation flue gas continue to
On flow into demisting dehydration layer 5 dehydrated, the condensed water in recovered flue gas；The condensed water of recycling is with circulating cooling liquid
Enter circulation fluid cooling tower 9 outside discharge tower and carry out cooling down, a part is used as desulfurization stock tank water, and a part is as cooling
Liquid is sent to cooling condenser 4 by coolant recirculation pump 10 and is recycled.Low-temperature heat exchange medium is by heat exchange liquid circulating pump 8 from heat exchange
Liquid surge tank 7 is sent to 12 heat exchanger 2 of gas approach, carries out heat exchange heating with high-temperature flue gas, completes the high temperature heat exchange medium of heating
Into outlet heat exchanger 6, heat exchange heating is carried out to the low-temperature flue gas for completing condensation demisting, flue gas eliminating white smoke is realized, completes flue gas
Low-temperature heat exchange medium after heating heat exchange enters heat exchange liquid surge tank 7 and continues cycling through use.
With the operation of device, when 61 resistance of first outlet heat exchanger rises, the of first outlet heat exchanger 61 is closed
Control valve on one heat transferring medium entrance 6a, the first heat transferring medium outlet 6c connecting line, opens first outlet heat exchanger 61
Control valve 16 on second liquid inlet 6f, the second liquid outlet 6e connecting line, using first outlet heat exchanger 61 to flue gas into
Row indirect condensing carries out self-cleaning to first outlet heat exchanger 61 using condensed water.
Described enters chimney heat exchanger 2 for exchanging heat the heat in flue gas into thermal medium water, for cold to cooling down
Solidifying, dewatered flue gas carries out heating and eliminates white cigarette, as preferred: entrance flue gas temperature fall is 10-30 DEG C.
The cooling condenser is used to carry out the saturated vapor after desulfurization cooling condensation, realizes in condensing droplet and flue gas
Remaining multi-pollutant carries out coalescence increase, pollutant is switched to liquid by gaseous state, as preferred: denitration spray unit circulation fluid
Liquid-gas ratio be 1-3L/Nm3, spraying layer coverage rate is 200%-400%, gas-liquid contact time 0.2-2s, flue gas cool-down amplitude
It is 5-20 DEG C, height of the hydrops layer away from top layer desulfurization spraying layer is 0.5-2m, and the distance of hydrops layer distance cooling spraying layer is 1-
3m。
The outlet heat exchanger includes that several layers heat exchanger is superposed, and bottom outlet heat exchanger can carry out cold and hot medium and cut
It changes, top layer outlet heat exchanger only walks heat medium, as preferred: two layers of the setting of outlet heat exchanger point, i.e. first outlet heat exchanger 61,
Second outlet heat exchanger 62, interlamellar spacing 0.5m-2m, upper layer and lower layer heat exchange area ratio are 1:1-3:1, and outlet heat exchanger bottom is walked
When heating agent, flue gas temperature rise is 3-10 DEG C, when walking refrigerant, and smoke temperature drop is 1-5 DEG C, and outlet heat exchanger upper layer is to flue gas heating
10-30℃。
The demisting dehydration layer 5 is used to that the condensed flue gas that cools down to be dried, and the liquid droplet of condensation is completed in trapping,
Condensing drip in recovered flue gas.As preferred: demister is metal folded plate type, can be set as one or more levels, demister metal
Surface is in hydrophily by nanometered disposal, and demister vane thickness 0.2-2mm, demister blade pitgh is 10-30mm, demister
Layer height is 100-500mm.
Desulfurization spray unit 3: it is made of desulfurization slurry spray main pipe with several spray atomizing nozzles, desulfurization slurry is by desulfurization
After circulation is pumped to desulfurization spraying layer, droplet is atomized by desulfurization spraying layer and inversely contacts washing with former flue gas progress, is removed
SO in flue gas2, the sour gas such as HF, HCl.
Demisting is dehydrated layer 5: for a kind of demister being made of multiple metal folding blades, for remove in flue gas partial size compared with
Small condensing droplet.
Embodiment 3: certain thermoelectricity unit, 1 410t/h coal burning flue gas desulfurization improvement project use this technique, entrance cigarette
SO in gas2Concentration is 2513mg/m3, dust concentration is 42mg/m in inlet flue gas3, cooling condensation segment circulation fluid liquid-gas ratio be
2.8L/Nm3, spraying layer coverage rate is 300%, and flue gas cool-down amplitude is 16 DEG C；Outlet heat exchanger interlamellar spacing be 0.6m, upper and lower two
Layer heat exchange area ratio is 2:1, and when outlet heat exchanger bottom walks heating agent, flue gas temperature rise is 5 DEG C, when walking refrigerant, smoke temperature drop 3
DEG C, outlet heat exchanger upper layer is 17 DEG C to flue gas heating；Demister vane thickness 0.4mm, demister blade pitgh are 15mm, are removed
Day with fog layer height is 300mm.SO2 concentration is 7.1mg/m in exiting flue gas3, dust concentration is 1.2mg/m in exiting flue gas3, nothing
White cigarette.
Embodiment 4: certain steam power plant, 1 130t/h coal burning flue gas desulfurization improvement project use this technique, inlet flue gas
Middle SO2 concentration is 3823mg/m3, dust concentration is 47mg/m in inlet flue gas3, the liquid-gas ratio of cooling condensation segment circulation fluid is 3L/
Nm3, spraying layer coverage rate is 300%, and flue gas cool-down amplitude is 18 DEG C；Outlet heat exchanger interlamellar spacing is 0.8m, and upper layer and lower layer are changed
Heat area ratio is 3:1, and when outlet heat exchanger bottom walks heating agent, flue gas temperature rise is 7 DEG C, when walking refrigerant, and smoke temperature drop is 3 DEG C, out
Mouth heat exchanger upper layer is 19 DEG C to flue gas heating；Demister vane thickness 0.4mm, demister blade pitgh are 18mm, demister
Layer height is 300mm.SO in exiting flue gas2Concentration is 11.2mg/m3, dust concentration is 1.7mg/m in exiting flue gas3, without white
Cigarette.
It is to be understood that: although the present embodiment contrasts detailed description to the present invention, these explanations, only
It is to simple declaration of the invention, rather than limiting the invention, any invention without departing from true spirit is created
It makes, each falls within protection scope of the present invention.
Claims (8)
1. a kind of low cost flue gas device for deep cleaning, including desulfurizing tower (1), the bottom space of desulfurizing tower (1) are starched as desulfurization
Pond (11), the tower wall of desulfurization stock tank (11) upper side desulfurizing tower (1) are equipped with into cigarette channel (12), and the upper end side is equipped with
Mouth (13), it is characterized in that: being successively arranged desulfurization spray unit (3) in desulfurizing tower (1) from bottom to up, cooling condenser (4), removing
Mist is dehydrated layer (5), first outlet heat exchanger (61), second outlet heat exchanger (62), enters the company of connection on the pipeline of cigarette channel (12)
It is connected into chimney heat exchanger (2), desulfurizing tower (1) is externally provided with heat exchange liquid surge tank (7), heat exchange liquid circulating pump (8), circulation fluid cooling
Tower (9), coolant recirculation pump (10), the bottom side of circulation fluid cooling tower (9) is by being serially connected with coolant recirculation pump (10)
Circulation line (14) second enters liquid with cooling first liquid inlet (42) of condenser (4), first outlet heat exchanger (61) respectively
Mouth (6f) connection, first liquid outlet (41) of condenser (4) that cools down, the second liquid outlet (6e) point of first outlet heat exchanger (61)
Not Tong Guo pipeline with the liquid return hole (91) of circulation fluid cooling tower (9) be connected to connection；The liquid outlet of heat exchange liquid surge tank (7) passes through string
The pipeline for being connected to heat exchange liquid circulating pump (8) is connected to connection with the liquid inlet of chimney heat exchanger (2), and chimney heat exchanger (2) goes out liquid
Mouthful by pipeline respectively with the first heat transferring medium entrance (6a) of first outlet heat exchanger (61), second outlet heat exchanger (62)
The connection connection of second heat transferring medium entrance (6b), the first heat transferring medium outlet (6c) of first outlet heat exchanger (61), second go out
The second heat transferring medium outlet (6d) of mouth heat exchanger (62) is connected by pipeline and the liquid return hole (71) of heat exchange liquid surge tank (7) respectively
Lead to and connects.
2. low cost flue gas device for deep cleaning according to claim 1, it is characterized in that: the desulfurization spray unit (3)
Be connected to connection with desulfurization stock tank (11) by being serially connected with the pipeline of slurry circulating pump (15) for liquid interface (31).
3. low cost flue gas device for deep cleaning according to claim 1, it is characterized in that: first outlet heat exchanger (61)
Second liquid inlet (6f), the second liquid outlet (6e), the first heat transferring medium entrance (6a), the second heat transferring medium entrance (6b), first
Control valve (16) are provided on the pipeline that heat transferring medium outlet (6c), the second heat transferring medium outlet (6d) connect.
4. low cost flue gas device for deep cleaning according to claim 1, it is characterized in that: coolant recirculation pump (10) and drop
Control valve (17) are provided on circulation line (14) between the liquid inlet (42) of warm condenser (4).
5. low cost flue gas device for deep cleaning according to claim 1, it is characterized in that: first outlet heat exchanger (61) with
Interlamellar spacing between second outlet heat exchanger (62) is 0.5m-2m.
6. a kind of low cost flue gas deep purifying receives water eliminating white smoke technique, it is characterised in that comprise the technical steps that: coal-fired cigarette
Gas enters in desulfurizing tower (1) after gas approach heat exchanger (2) heat exchange cooling, the flue gas and desulfurization spray unit (2) after cooling
Loop slurry complete wet desulphurization after form high-humidity gas fume；Complete desulfurization high-humidity gas fume successively by cooling condenser (4),
Demisting is dehydrated layer (5), first outlet heat exchanger (61), second outlet heat exchanger (62) completion flue gas condensing, receives water drying and rise
Warm eliminating white smoke, it may be assumed that saturated flue gas is upwardly into cooling condenser (4) after desulfurization and cooling spray liquid carries out reverse contact heat-exchanging,
Flue-gas temperature drops to 30 DEG C -45 DEG C, and vapor and remaining acid gas are with slurries droplet, soluble-salt droplet, ultrafine dust
Particulate matter is that the nuclei of condensation are condensed into liquid droplet, realizes the deep purifying of residual contaminants in flue gas；Complete the cigarette of cooling condensation
Gas continue up flow into demisting dehydration layer (5) dehydrated, the condensed water in recovered flue gas；Low-temperature heat exchange medium by
Heat exchange liquid circulating pump (8) is sent from heat exchange liquid surge tank (7) to gas approach (12) heat exchanger (2), is exchanged heat with high-temperature flue gas
Heating, the high temperature heat exchange medium for completing heating enter outlet heat exchanger (6), exchange heat to the low-temperature flue gas for completing condensation demisting
Flue gas eliminating white smoke is realized in heating, and the low-temperature heat exchange medium after completing flue gas heating heat exchange, which enters heat exchange liquid surge tank (7), to be continued to follow
Ring uses.
7. low cost flue gas deep purifying according to claim 6 receives water eliminating white smoke technique, it is characterised in that with device
Operation, when first outlet heat exchanger (61) resistance rise when, close first outlet heat exchanger (61) the first heat transferring medium enter
Control valve on mouth (6a), the first heat transferring medium outlet (6c) connecting line, open first outlet heat exchanger (61) second enter
Control valve (16) on liquid mouth (6f), the second liquid outlet (6e) connecting line, using first outlet heat exchanger (61) to flue gas
Indirect condensing is carried out, self-cleaning is carried out to first outlet heat exchanger (61) using condensed water.
8. low cost flue gas deep purifying according to claim 6 receives water eliminating white smoke technique, it is characterised in that recycling is coagulated
It bears water with circulation fluid cooling tower (9) progress cooling down is entered outside circulating cooling liquid discharge tower, a part is used as desulfurization stock tank
Water, a part are used as coolant liquid, are sent by coolant recirculation pump (10) to cooling condenser (4) and are recycled.
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|---|---|---|---|
| CN201811171922.3A CN108970370A (en) | 2018-10-09 | 2018-10-09 | It is a kind of low cost flue gas device for deep cleaning and its purification receive water eliminating white smoke technique |
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| CN110207143A (en) * | 2019-05-28 | 2019-09-06 | 浙江南化防腐设备有限公司 | Flue gas condensing takes off white system and its control method |
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