CN109442451A - Boiler flue gas treatment system - Google Patents
Boiler flue gas treatment system Download PDFInfo
- Publication number
- CN109442451A CN109442451A CN201811488626.6A CN201811488626A CN109442451A CN 109442451 A CN109442451 A CN 109442451A CN 201811488626 A CN201811488626 A CN 201811488626A CN 109442451 A CN109442451 A CN 109442451A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- pipe
- regenerator
- boiler
- absorber
- 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
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 172
- 239000003546 flue gas Substances 0.000 title claims abstract description 171
- 239000006096 absorbing agent Substances 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000000779 smoke Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims description 35
- 238000009833 condensation Methods 0.000 claims description 17
- 230000005494 condensation Effects 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 10
- 239000003517 fume Substances 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 7
- 239000003595 mist Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 abstract description 10
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 36
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 21
- 239000000498 cooling water Substances 0.000 description 20
- 238000010521 absorption reaction Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000004064 recycling Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical group [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- -1 preferably Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- 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
- B01D53/1425—Regeneration of liquid absorbents
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
- F28D21/0007—Water heaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/306—Alkali metal compounds of potassium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2219/00—Treatment devices
- F23J2219/70—Condensing contaminants with coolers
-
- 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)
- Oil, Petroleum & Natural Gas (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of boiler flue gas treatment systems, including flue gas condensing unit, absorber, regenerator, steam condensing unit and more back-flowing and branched pipes, flue gas condensing unit is connected to by the first smoke exhaust pipe with boiler, absorber is connected to by the second smoke exhaust pipe with flue gas condensing unit, and absorber is connected to by third smoke exhaust pipe with chimney；It is connected to respectively by drain pipe and inlet tube between absorber and regenerator, regenerator is connected to by jet chimney with steam condensing unit, steam condensing unit and flue gas condensing unit are connected with a back-flowing and branched pipe heat exchange respectively, the water return pipeline connection of each back-flowing and branched Guan Junyu boiler.The present invention can be reduced the pollutant contained in smoke evacuation, reduce humidity of flue gas, reduce each part dimension and the waste heat to flue gas and moisture are effectively recycled.
Description
Technical field
The present invention relates to boiler smoke processing technology fields, refer in particular to a kind of boiler flue gas treatment system.
Background technique
With the propulsion of gas replacing coal project, gas fired-boiler in heating using more and more extensive.The row of gas fired-boiler
Cigarette water capacity (water vapour content) is significantly larger than the water capacity of coal-burning boiler, and vapor carries a large amount of latent heat, and waste heat recycling is latent
Power is very big.For heat supply in winter boiler, existing flue gas waste heat recovery mode there are two main classes mode: one kind is to pass through heating water return
Or the water at low temperature and flue gas heat exchange of heat pump preparation, including condensing waste heat recycling (condensing boiler), electric compression heat pump waste heat time
It receives, the recycling of enclosed absorption heat pump waste heat；Another kind of is directly to be contacted flue gas with solution based on solution dehumidification principle, is utilized
Hygroscopic solution absorbs the vapor and latent heat in flue gas, such as open type absorbent formula residual neat recovering system.
But during existing fume treatment, the flue gas that often will appear after processing is all low temperature saturated flue gas, is easy
Moisture condensation generates " white cigarette ", and low-temperature flue gas is not easy to spread, it is sometimes desirable to reheating；The water of high-quality cannot be directly recycled, condensate is wanted
Drain or needs subsequent processing that could utilize；Waste heat recovering effect is limited, and a large amount of latent heat cannot recycle in flue gas；Waste heat
Cost recovery is higher；Equipment is more huge, and nitrogen oxides removal effect is unobvious；Circulatory mediator (solution) is easy contaminated；If
The technical problems such as standby corrosion.Therefore, how to effectively reduce the pollutant contained in flue gas, reduce humidity of flue gas and to flue gas
Waste heat and moisture effectively recycled, become this field urgent problem to be solved.
Summary of the invention
The object of the present invention is to provide a kind of boiler flue gas treatment system, it can be reduced the pollutant contained in flue gas, reduce
The boiler smoke processing of humidity of flue gas, the size for reducing each component and waste heat and moisture progress effective recycling to flue gas
System.
In order to achieve the above objectives, the present invention provides a kind of boiler flue gas treatment systems, wherein the boiler smoke processing
System includes flue gas condensing unit, absorber, regenerator, steam condensing unit and more back-flowing and branched pipes, the flue gas condensing
Unit is connected to by the first smoke exhaust pipe with boiler, and the absorber is connected to by the second smoke exhaust pipe with the flue gas condensing unit,
And the absorber is connected to by third smoke exhaust pipe with chimney；Pass through drain pipe respectively between the absorber and the regenerator
Be connected to inlet tube, the regenerator is connected to by jet chimney with the steam condensing unit, the steam condensing unit and
The flue gas condensing unit is connected with a back-flowing and branched pipe heat exchange respectively, boiler described in each back-flowing and branched Guan Junyu
Water return pipeline connection.
Boiler flue gas treatment system as described above, wherein the flue gas condensing unit includes flue gas condenser, water circulation
Pipe, First Heat Exchanger and lye tank, the both ends of the water-circulating pipe are cold with the top of the flue gas condenser, the flue gas respectively
The bottom of condenser is connected to, and the First Heat Exchanger is set on the water-circulating pipe, and is returned described in the First Heat Exchanger and one
The heat exchange connection of moisture branch pipe, the water-circulating pipe is equipped with can be by the liquid in the flue gas condenser by the flue gas condenser
Bottom be delivered to the flue gas condenser top first pump housing, the lye tank passes through lye supply pipe and the flue gas
The bottom of condenser is connected to, and the lye supply pipe, which is equipped with, to be delivered to the flue gas condensing for the lye in the lye tank
Second pump housing of device, and the lye supply pipe be equipped with the liquid in the flue gas condenser can be prevented along the lye supply pipe
Flow to the check-valves of the lye tank, the check-valves be located at the connectivity part of the lye supply pipe and the flue gas condenser with
Between second pump housing；Liquid discharging tube, the company between the liquid discharging tube and the water-circulating pipe are communicated on the water-circulating pipe
Logical place is between the water-circulating pipe and the connectivity part and the First Heat Exchanger of the flue gas condenser, on the liquid discharging tube
Equipped with bleeder valve.
Boiler flue gas treatment system as described above, wherein the flue gas condenser is direct contact type condenser.
Boiler flue gas treatment system as described above, wherein the bottom of the first end of the drain pipe and the absorber
Connection, the second end of the drain pipe are connected to the top of the regenerator, the first end of the inlet tube and the regenerator
Bottom connection, the second end of the inlet tube be connected to the top of the absorber, the drain pipe be equipped with energy will described in
Solution in absorber is delivered to the third pump housing of the regenerator, and the inlet tube is equipped with can will be molten in the regenerator
Liquid is delivered to the 4th pump housing of the absorber, and the inlet tube is equipped with the second heat exchanger, second heat exchanger and one
The back-flowing and branched pipe heat exchange connection, the bottom connection of the absorber are equipped with a sewage pipe, and the sewage pipe is equipped with blowdown
Valve.
Boiler flue gas treatment system as described above, wherein regenerator is equipped between the regenerator and the absorber,
The second end of the drain pipe is connected to through the regenerator with the upper end of the regenerator, and the first end of the inlet tube runs through
The regenerator is connected to the lower end of the regenerator, and the drain pipe is changed with the inlet tube in the inside of the regenerator
Heat.
Boiler flue gas treatment system as described above, wherein the regenerator is Gas Direct-fired type regenerator, the regeneration
The smoke discharging pipe of device is connected to first smoke exhaust pipe.
Boiler flue gas treatment system as described above, wherein the inner upper of the regenerator is equipped with mist eliminating net.
Boiler flue gas treatment system as described above, wherein the steam condensing unit includes steam condenser, vacuum pump
And condensation tank, the vacuum pump are connected to by vacuum-pumping tube with the inside of the steam condenser, the condensation tank passes through condensate
Delivery pipe is connected to the inside of the steam condenser, and the steam condenser and a back-flowing and branched pipe heat exchange connect.
Boiler flue gas treatment system as described above, wherein pass through liquid back pipe between the drain pipe and the inlet tube
Connection, the liquid back pipe are equipped with back liquid valve.
Boiler flue gas treatment system as described above, wherein each back-flowing and branched pipe in parallel respectively with institute
It states water return pipeline connection or each back-flowing and branched pipe sequentially connects in series and is connected to the water return pipeline.
Compared with prior art, advantages of the present invention is as follows:
1, boiler flue gas treatment system provided by the invention is absorbed water by absorber flue gas condensing unit with absorber twice
The water content of flue gas can be effectively reduced in effect, and final smoke evacuation is unsaturated state, and the effect for the white drop nitrogen that disappears is obvious, have preferable
Ecological benefits.
2, boiler flue gas treatment system provided by the invention in the process of processing, is passing through flue gas condensing to flue gas
The circulating cooling water energy containing lye effectively absorbs the soluble nitrogen oxide in flue gas in unit, prevents flue gas to absorber
In hygroscopic solution pollute, while the preliminary water content reduced in flue gas reduces the moisture absorption load of absorber, can
Effectively to reduce the size of absorber, regenerator and steam condensing unit.
3, boiler flue gas treatment system provided by the invention passes through setting more return water being connected to boiler blow-down water pipeline point
Branch pipe and flue gas condensing unit, the heat exchange of steam condensing unit connect, and the water in each back-flowing and branched pipe can be made to improve temperature by heat exchange
The water return pipeline that boiler is flowed into after degree, to improve boiler blow-down water temperature, while the condensation water energy that steam condensing unit obtains is straight
It connects and is used as boiler replenishing water, so that fume afterheat and moisture be made to have obtained sufficient recycling, system only needs to put into a small amount of pump work more
With blower power consumption, operating cost is low, with good economic efficiency.
Detailed description of the invention
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural schematic diagram of boiler flue gas treatment system provided by the invention；
Fig. 2 is another structural schematic diagram of boiler flue gas treatment system provided by the invention.
Drawing reference numeral explanation:
1, flue gas condensing unit；
11, flue gas condenser；
12, water-circulating pipe；
121, first pump housing；
13, First Heat Exchanger；
14, lye tank；
15, the first back-flowing and branched pipe；
16, lye supply pipe；
161, second pump housing；
162, check-valves；
17, liquid discharging tube；
171, bleeder valve；
2, absorber；
21, drain pipe；
211, the third pump housing；
22, inlet tube；
221, the 4th pump housing；
222, the second heat exchanger；
223, the second back-flowing and branched pipe；
23, sewage pipe；
231, blowdown valve；
24, liquid back pipe；
241, liquid valve is returned；
3, regenerator；
31, jet chimney；
4, steam condensing unit；
41, steam condenser；
42, vacuum pump；
43, condensation tank；
44, vacuum tube；
45, condensate delivery pipe；
46, the back-flowing and branched pipe of third；
5, regenerator；
6, boiler；
61, the first smoke exhaust pipe；
62, the second smoke exhaust pipe；
63, third smoke exhaust pipe；
7, chimney；
8, air-introduced machine
Specific embodiment
In order to have clearer understanding to technical solution of the present invention, purpose and effect, now in conjunction with the Detailed description of the invention present invention
Specific embodiment.
As shown in Figures 1 and 2, the present invention provides a kind of boiler flue gas treatment systems, wherein boiler flue gas treatment system
Including flue gas condensing unit 1, absorber 2, regenerator 3, steam condensing unit 4 and more back-flowing and branched pipes, flue gas condensing unit 1
It is connected to by the first smoke exhaust pipe 61 with boiler 6, absorber 2 is connected to by the second smoke exhaust pipe 62 with flue gas condensing unit 1, and is absorbed
Device 2 is connected to by third smoke exhaust pipe 63 with chimney 7, and the flue gas in boiler 6 is cold into flue gas by the first smoke exhaust pipe 61 from boiler 6
Solidifying unit 1, contact and condenses with recirculated cooling water in flue gas condensing unit 1, so completes preliminary cooling, tentatively removes water and can
The removal of dissolubility nitrogen oxides then enters absorber 2 by the second smoke exhaust pipe 62, and second is carried out in absorber 2 and is removed water,
Obtain the flue gas of unsaturated state, the flue gas of unsaturated state on third smoke exhaust pipe 63 and third smoke exhaust pipe 63 by being arranged
Air-introduced machine 8 is introduced into chimney 7 and is discharged into atmosphere, can will be in flue gas after being removed water twice by flue gas condensing unit 1 and absorber 2
Most of moisture recycling, in the process, can be effectively reduced the water content of flue gas, and final smoke evacuation is unsaturated state, and is passed through
Circulating cooling water energy in flue gas condensing unit 1 effectively absorbs the soluble nitrogen oxide in flue gas, prevents flue gas to absorption
Hygroscopic solution in device 2 pollutes, while the preliminary water content reduced in flue gas, and the moisture absorption for reducing absorber 2 is negative
Lotus can effectively reduce the size of absorber 2, regenerator 3 and steam condensing unit 4；Between absorber 2 and regenerator 3 respectively
It is connected to by drain pipe 21 with inlet tube 22, the hygroscopic solution in absorber 2 is diluted after absorbing the moisture in flue gas, diluted
Hygroscopic solution is entered in regenerator 3 by drain pipe 21 carries out heating concentration, steams the moisture in diluted hygroscopic solution
The hygroscopic solution of hair, the hygroscopic solution being concentrated, concentration is flow back into absorber 2 by inlet tube 22 in flue gas again
Moisture is absorbed, and such hygroscopic solution recycles benefit by drain pipe 21 and inlet tube 22 between absorber 2 and regenerator 3
With so that effectively the moisture in flue gas be recycled；Regenerator 3 is connected to by jet chimney 31 with steam condensing unit 4, diluted
The hygroscopic solution vapor that heating evaporation goes out in regenerator 3 is entered in steam condenser 41 by jet chimney 31 to be obtained after condensation
To condensed water, the obtained condensed water is analogous to the high-quality condensate of distilled water, can enter directly as the moisturizing of boiler 6
Boiler 6；Steam condensing unit 4, flue gas condensing unit 1 and the second heat exchanger 222 are connected with a back-flowing and branched pipe heat exchange respectively,
The heat of flue gas is exchanged to the boiler made in each back-flowing and branched pipe to the boiler blow-down water in back-flowing and branched pipe in a manner of heat exchange
Return water temperature increases, the water return pipeline connection of each back-flowing and branched Guan Junyu boiler 6, the boiler blow-down water heat exchange in each back-flowing and branched pipe
The water return pipeline of boiler 6 is flow back into after heating, and flows into the water supply line of boiler 6 after heating again in boiler 6, due to boiler
Return water has utilized side of the heat of combustion gas generation in the fume afterheat and regenerator 3 of boiler 6 to exchange heat before flowing back to boiler 6
Formula is preheated, therefore the use of combustion gas in boiler 6 can be reduced during subsequent heat, what regenerator 3 was used with boiler 6
Combustion gas total amount is reduced, with good economic efficiency.
Further, as shown in Figures 1 and 2, boiler flue gas treatment system provided by the invention, wherein flue gas condensing list
Member 1 includes flue gas condenser 11, water-circulating pipe 12, First Heat Exchanger 13 and lye tank 14, and flue gas condenser 11 is directly to contact
Formula condenser, specially spray packed tower, the both ends of water-circulating pipe 12 respectively with the top of flue gas condenser 11, flue gas condenser
11 bottom connection, sprays the recirculated cooling water in flue gas condenser 11 downwards by the top of flue gas condenser 11, and in cigarette
The bottom of gas condenser 11 flows back into the top of flue gas condenser 11 by water-circulating pipe 12 again, realizes following for recirculated cooling water
Ring will enter soluble nitrogen oxide contained in the flue gas in flue gas condenser 11 during recirculated cooling water circulation
It absorbs, the part vapor condensation simultaneously because the cooling effect of recirculated cooling water makes flue gas cool-down, while in flue gas and with following
Ring cooling water flows away circulation together, the mesh for so reaching the polluted gas in removal flue gas, carrying out preliminary cooling water removal to flue gas
's；First Heat Exchanger 13 is set on water-circulating pipe 12, and First Heat Exchanger 13 and a back-flowing and branched pipe heat exchange connect, wherein
Changing hot linked back-flowing and branched pipe with First Heat Exchanger 13 is the first back-flowing and branched pipe 15, and recirculated cooling water is in flue gas condenser 11
In from top to bottom spray during can absorb the heat of flue gas and heat up, by the way that First Heat Exchanger is arranged on water-circulating pipe 12
13, the heat that recirculated cooling water absorbs can be passed to the boiler blow-down water in the first back-flowing and branched pipe 15 in a manner of heat exchange,
Realize the recycling of fume afterheat；Water-circulating pipe 12 is equipped with can be by the liquid in flue gas condenser 11 by flue gas condenser 11
Bottom be delivered to flue gas condenser 11 top first pump housing 121, to guarantee recirculated cooling water smooth circulation；Lye tank 14
It is connected to by lye supply pipe 16 with the bottom of flue gas condenser 11, lye supply pipe 16 is equipped with can be by the alkali in lye tank 14
Second pump housing 161 that liquid is delivered to flue gas condenser 11 can make recirculated cooling water by conveying lye into flue gas condenser 11
In alkaline water, so as to further improve absorption of the recirculated cooling water to nitrogen oxides, preferably, lye is potassium carbonate
Aqueous solution, the potassium nitrate generated after potassium carbonate absorbing NOx can do chemical fertilizer use after processing；And lye supply pipe 16 is equipped with
The recirculated cooling water in flue gas condenser 11 can be prevented to flow to the check-valves 162 of lye tank 14, check-valves along lye supply pipe 16
162 between lye supply pipe 16 and the connectivity part and second pump housing 161 of flue gas condenser 11；It is communicated on water-circulating pipe 12
Liquid discharging tube 17, the connectivity part between liquid discharging tube 17 and water-circulating pipe 12 are located at the connectivity part of water-circulating pipe 12 and flue gas condenser 11
Between First Heat Exchanger 13, liquid discharging tube 17 is equipped with bleeder valve 171, is arranged by setting liquid discharging tube 17 and on liquid discharging tube 17
Bleeder valve 171 periodically can discharge the recirculated cooling water in flue gas condenser 11 for staff, to guarantee liquid measure
Under the premise of guarantee the alkalinity of recirculated cooling water, the case where avoiding the recirculated cooling water in flue gas condenser 11 from largely increasing accumulation hair
It is raw；In addition, the connectivity part between liquid discharging tube 17 and water-circulating pipe 12 can also be located at water-circulating pipe 12 and flue gas condenser 11
Between the connectivity part and First Heat Exchanger 13 at top, change recirculated cooling water after the outflow of the bottom of flue gas condenser 11 with first
Hot device 13 is discharged again after exchanging heat, further raising fume afterheat utilization efficiency.
Further, as shown in Figures 1 and 2, boiler flue gas treatment system provided by the invention, wherein drain pipe 21
First end is connected to the bottom of absorber 2, and the second end of drain pipe 21 is connected to the top of regenerator 3, and the first of inlet tube 22
End is connected to the bottom of regenerator 3, and the second end of inlet tube 22 is connected to the top of absorber 2, the hygroscopic solution in absorber 2
It is flowed into regenerator 3 by the bottom of absorber 2 by drain pipe 21 after moisture in absorption flue gas and carries out heating evaporation, obtained
The hygroscopic solution of concentration is entered the inside of absorber 2 by the bottom of regenerator 3 by inlet tube 22 from the top of absorber 2, and
It sprays from top to bottom, the hygroscopic solution and smoke contacts after being concentrated during spray simultaneously absorb the moisture in flue gas again, such as
This circulation, the moisture in flue gas is recycled, and drain pipe 21, which is equipped with, can be delivered to the solution in absorber 2 the of regenerator 3
Three pump housings 211, inlet tube 22 is equipped with the 4th pump housing 221 that the solution in regenerator 3 can be delivered to absorber 2, by setting
It sets the third pump housing 211 and the 4th pump housing 221 can guarantee the smooth circulation of hygroscopic solution；Inlet tube 22 is equipped with the second heat exchanger
222, the second heat exchanger 222 and a back-flowing and branched pipe heat exchange connect, and change hot linked back-flowing and branched pipe with the second heat exchanger 222
For the second back-flowing and branched pipe 223, hygroscopic solution has very high temperature after heating in regenerator 3, is flowing into inlet tube 22
Effectively the heat of hygroscopic solution can be exchanged to the boiler blow-down water in the second back-flowing and branched pipe 223 by the second heat exchanger 222 afterwards,
Realize that the recycling of the heat of hygroscopic solution, the bottom connection of absorber 2 are equipped with a sewage pipe 23, sewage pipe 23 is equipped with row
Dirty valve 231 can carry out discharge replacement to the hygroscopic solution in absorber 2 by setting sewage pipe 23 and blowdown valve 231, to guarantee
The cleaning of hygroscopic solution.
Further, as shown in Figures 1 and 2, boiler flue gas treatment system provided by the invention, wherein regenerator 3 with
Regenerator 5 is equipped between absorber 2, the second end of drain pipe 21 is connected to through regenerator 5 with the upper end of regenerator 3, inlet tube
22 first end is connected to through regenerator 5 with the lower end of regenerator 3, and drain pipe 21 is changed with inlet tube 22 in the inside of regenerator 5
Heat.By be arranged regenerator 5 the diluted hygroscopic solution in drain pipe 21 can be preheated, make diluted hygroscopic solution into
Enter regenerator 3 and carry out temperature i.e. with higher before heating evaporation, is added with reducing regenerator 3 to diluted hygroscopic solution
The burden and cost of thermal evaporation.
Further, as shown in Figure 1 and Figure 2 above, boiler flue gas treatment system provided by the invention, wherein regenerator 3 is
Gas Direct-fired type regenerator, construction is similar with small gas boiler, boils diluted hygroscopic solution using combustion gas as heat source, makes
Its internal moisture evaporation, wherein absorber 2 to the evaporation capacity of moisture in the uptake and regenerator 3 of the moisture in flue gas with
And the condensation number of vapor is equal in steam condensing unit 4, so the moisture absorption load of absorber 2 is small to mean moisture absorption
Heat needed for solution concentration is small, can achieve the purpose for reducing the size of regenerator 3；The smoke discharging pipe of regenerator 3 and first
Smoke exhaust pipe 61 is connected to, and flue gas caused by combustion gas is handled together with the flue gas of boiler 6 in regenerator 3.
Preferably, boiler flue gas treatment system provided by the invention, wherein the inner upper of regenerator 3 is equipped with mist eliminating
Net prevents hygroscopic solution from being carried and being influenced during heating secretly the water quality of condensed water by vapor.
Further, as shown in Figures 1 and 2, boiler flue gas treatment system provided by the invention, wherein steam condensation is single
Member 4 includes steam condenser 41, vacuum pump 42 and condensation tank 43, and vacuum pump 42 passes through vacuum-pumping tube 44 and steam condenser 41
Inside connection, steam condenser 41 and regenerator 3 are the airtight cavity to link together, can be by the cavity by vacuum pump 42
Fixed gas is taken away, makes to maintain vacuum in the cavity, keeps preferable condensation effect, improves the condensation efficiency of steam condenser 41,
Meanwhile the hygroscopic solution in regenerator 3 being made to boil in the state that low-pressure low-temperature is low oxygen-containing, hygroscopic solution is reduced to regenerator
3 corrosion, condensation tank 43 are connected to by condensate delivery pipe 45 with the inside of steam condenser 41, and the condensed water obtained after condensation is logical
It crosses condensate delivery pipe 45 and is discharged into moisturizing in condensation tank 43 as boiler 6, steam condenser 41 and a back-flowing and branched pipe exchange heat
Connection, wherein in the back-flowing and branched pipe that steam condenser 41 connects be the back-flowing and branched pipe 46 of third, the back-flowing and branched pipe of third 46 with
Steam in steam condenser 41 exchanges heat, so that the heat to steam is recycled, improves the temperature of boiler blow-down water,
It is with good economic efficiency.
Preferably, as shown in Fig. 2, boiler flue gas treatment system provided by the invention, wherein drain pipe 21 and inlet tube
It is connected between 22 by liquid back pipe 24, liquid back pipe 24 is equipped with back liquid valve 241 or liquid back pipe 24 and passes through a triple valve and drain
The connection of pipe 21 can be discharged from absorber 2 by drain pipe 21 diluted by setting liquid back pipe 24 and time liquid valve 241
Hygroscopic solution only a fraction, which enters in regenerator 3, to be heated to boiling and is concentrated, and the heating of regenerator 3 can so be effectively reduced
Concentration burden to reduce the size of regenerator 3, while reducing the heat exchange burden of the second heat exchanger 222, reduces the second heat exchanger
222 size.
Preferably, boiler flue gas treatment system provided by the invention, wherein each back-flowing and branched pipe divides in parallel
It is not connected to water return pipeline or each back-flowing and branched pipe sequentially connects in series and is connected to water return pipeline, the present invention is simultaneously
It is not limited.
It should be noted that in the present invention, flow direction of the flue gas in absorber 2, which can be to pass through from bottom to top, inhales
It receives device 2 (adverse current), or absorber 2 (distributary) can also be horizontally through, the present invention is not limited thereto.
Compared with prior art, advantages of the present invention is as follows:
1, boiler flue gas treatment system provided by the invention is absorbed water by absorber flue gas condensing unit with absorber twice
The water content of flue gas can be effectively reduced in effect, and final smoke evacuation is unsaturated state, and the effect for the white drop nitrogen that disappears is obvious, have preferable
Ecological benefits.
2, boiler flue gas treatment system provided by the invention in the process of processing, is passing through flue gas condensing to flue gas
Circulating cooling water energy in unit effectively absorbs the soluble nitrogen oxide in flue gas, prevents flue gas to the moisture absorption in absorber
Solution pollutes, while the preliminary water content reduced in flue gas, reduces the moisture absorption load of absorber, can effectively contract
The size of small absorber, regenerator and steam condensing unit.
3, boiler flue gas treatment system provided by the invention passes through setting more return water being connected to boiler blow-down water pipeline point
Branch pipe and flue gas condensing unit, the heat exchange of steam condensing unit connect, and the water in each back-flowing and branched pipe can be made to improve temperature by heat exchange
The water return pipeline that boiler is flowed into after degree, to improve boiler blow-down water temperature, while the condensation water energy that steam condensing unit obtains is straight
It connects and is used as boiler replenishing water, so that fume afterheat and moisture be made to have obtained sufficient recycling, system only needs to put into a small amount of pump work more
With blower power consumption, operating cost is low, with good economic efficiency.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any
Those skilled in the art, under the premise of not departing from design and the principle of the present invention made equivalent variations with repair
Change, should belong to the scope of protection of the invention.
Claims (10)
1. a kind of boiler flue gas treatment system, which is characterized in that the boiler flue gas treatment system includes flue gas condensing unit, inhales
Device, regenerator, steam condensing unit and more back-flowing and branched pipes are received, the flue gas condensing unit passes through the first smoke exhaust pipe and boiler
Connection, the absorber are connected to by the second smoke exhaust pipe with the flue gas condensing unit, and the absorber is discharged fume by third
Pipe is connected to chimney；It is connected to respectively by drain pipe and inlet tube between the absorber and the regenerator, the regenerator
It is connected to by jet chimney with the steam condensing unit, the steam condensing unit and the flue gas condensing unit are respectively with one
Back-flowing and branched pipe heat exchange described in root connects, the water return pipeline connection of boiler described in each back-flowing and branched Guan Junyu.
2. boiler flue gas treatment system according to claim 1, which is characterized in that the flue gas condensing unit includes flue gas
Condenser, water-circulating pipe, First Heat Exchanger and lye tank, the both ends of the water-circulating pipe top with the flue gas condenser respectively
The bottom connection in portion, the flue gas condenser, the First Heat Exchanger is set on the water-circulating pipe, and the First Heat Exchanger
It is connected with a back-flowing and branched pipe heat exchange, the water-circulating pipe is equipped with can be by the liquid in the flue gas condenser by institute
State flue gas condenser bottom be delivered to the flue gas condenser top first pump housing, the lye tank pass through lye supply
Pipe is connected to the bottom of the flue gas condenser, and the lye supply pipe is equipped with and can be delivered to the lye in the lye tank
Second pump housing of the flue gas condenser, and the lye supply pipe be equipped with the liquid in the flue gas condenser can be prevented along institute
The check-valves that lye supply pipe flow to the lye tank is stated, the check-valves is located at the lye supply pipe and the flue gas condensing
Between the connectivity part of device and second pump housing；Liquid discharging tube is communicated on the water-circulating pipe, the liquid discharging tube is followed with the water
Connectivity part between endless tube is located between the water-circulating pipe and the connectivity part and the First Heat Exchanger of the flue gas condenser,
The liquid discharging tube is equipped with bleeder valve.
3. boiler flue gas treatment system according to claim 2, which is characterized in that the flue gas condenser is directly to contact
Formula condenser.
4. boiler flue gas treatment system according to claim 1, which is characterized in that the first end of the drain pipe with it is described
The bottom of absorber is connected to, and the second end of the drain pipe is connected to the top of the regenerator, the first end of the inlet tube
It is connected to the bottom of the regenerator, the second end of the inlet tube is connected to the top of the absorber, on the drain pipe
Equipped with the third pump housing that the solution in the absorber can be delivered to the regenerator, the inlet tube is equipped with energy will be described
Solution in regenerator is delivered to the 4th pump housing of the absorber, and the inlet tube is equipped with the second heat exchanger, and described second
Heat exchanger and a back-flowing and branched pipe heat exchange connect, and the bottom connection of the absorber is equipped with a sewage pipe, the blowdown
Pipe is equipped with blowdown valve.
5. boiler flue gas treatment system according to claim 4, which is characterized in that the regenerator and the absorber it
Between be equipped with regenerator, the second end of the drain pipe is connected to through the regenerator with the upper end of the regenerator, the feed liquor
The first end of pipe is connected to through the regenerator with the lower end of the regenerator, and the drain pipe and the inlet tube are in described time
The internal heat of hot device.
6. boiler flue gas treatment system according to claim 4 or 5, which is characterized in that the regenerator is Gas Direct-fired
Type regenerator, the smoke discharging pipe of the regenerator are connected to first smoke exhaust pipe.
7. boiler flue gas treatment system according to claim 4 or 5, which is characterized in that the inner upper of the regenerator
Equipped with mist eliminating net.
8. boiler flue gas treatment system according to claim 1, which is characterized in that the steam condensing unit includes steam
Condenser, vacuum pump and condensation tank, the vacuum pump are connected to by vacuum-pumping tube with the inside of the steam condenser, described solidifying
Water tank is connected to by condensate delivery pipe with the inside of the steam condenser, the steam condenser and one it is described back-flowing and branched
Pipe heat exchange connection.
9. described in any item boiler flue gas treatment systems according to claim 1~5, which is characterized in that the drain pipe and institute
It states and is connected between inlet tube by liquid back pipe, the liquid back pipe is equipped with back liquid valve.
10. described in any item boiler flue gas treatment systems according to claim 1~5, which is characterized in that each described back-flowing and branched
Pipe is connected to respectively with the water return pipeline in parallel or each back-flowing and branched pipe sequentially connects simultaneously in series
It is connected to the water return pipeline.
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| CN201811488626.6A CN109442451B (en) | 2018-12-06 | 2018-12-06 | Boiler flue gas treatment system |
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| CN201811488626.6A CN109442451B (en) | 2018-12-06 | 2018-12-06 | Boiler flue gas treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201498A (en) * | 2019-04-25 | 2019-09-06 | 上海海事大学 | A kind of desulfurization fume dehumidification system |
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| CN206905338U (en) * | 2017-06-21 | 2018-01-19 | 燕山大学 | A kind of fume afterheat depth recovery system based on Absorption heat-transformer |
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| EP0110763A1 (en) * | 1982-11-22 | 1984-06-13 | Gaz De France | Heating plant equipped with an absorption heat pump |
| US20070012187A1 (en) * | 2005-07-18 | 2007-01-18 | Siemens Westinghouse Power Corporation | System for removing water from flue gas |
| CN101858231A (en) * | 2010-04-07 | 2010-10-13 | 清华大学 | Energy supply system mainly through gas and steam combined cycle cogeneration |
| CN204756902U (en) * | 2015-05-13 | 2015-11-11 | 广州环渝能源科技有限公司 | System for utilize gasifier to realize that carbon reduces discharging |
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| CN109442451B (en) | 2024-02-23 |
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