CN108050850A - A kind of yellow phosphoric tail gas boiler flue gas purification system and purification method - Google Patents
A kind of yellow phosphoric tail gas boiler flue gas purification system and purification method Download PDFInfo
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- CN108050850A CN108050850A CN201711065046.1A CN201711065046A CN108050850A CN 108050850 A CN108050850 A CN 108050850A CN 201711065046 A CN201711065046 A CN 201711065046A CN 108050850 A CN108050850 A CN 108050850A
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- boiler
- tail gas
- flue gas
- gas
- yellow
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- 239000007789 gas Substances 0.000 title claims abstract description 138
- 239000003546 flue gas Substances 0.000 title claims abstract description 79
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000000746 purification Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 30
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000002485 combustion reaction Methods 0.000 claims abstract description 36
- 238000004140 cleaning Methods 0.000 claims abstract description 24
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 16
- 230000023556 desulfurization Effects 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 12
- 239000000567 combustion gas Substances 0.000 claims abstract description 4
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 48
- 229910052757 nitrogen Inorganic materials 0.000 claims description 24
- 239000011941 photocatalyst Substances 0.000 claims description 20
- 230000008929 regeneration Effects 0.000 claims description 16
- 238000011069 regeneration method Methods 0.000 claims description 16
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 14
- 239000011593 sulfur Substances 0.000 claims description 14
- 239000005864 Sulphur Substances 0.000 claims description 13
- 239000002918 waste heat Substances 0.000 claims description 13
- 239000012717 electrostatic precipitator Substances 0.000 claims description 12
- 230000003009 desulfurizing effect Effects 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 11
- 239000000779 smoke Substances 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 10
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000001508 sulfur Nutrition 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
-
- 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
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a kind of yellow phosphoric tail gas boiler flue gas purification systems, for the yellow phosphorus electric furnace tail gas when yellow phosphoric tail gas is used as boiler oil gas and boiler combustion gas cleaning processing, it is related to purifying exhausting gas of yellow phosphorus field, including desulphurization system, denitrating system, desulphurization system is arranged between boiler and yellow phosphorus electric furnace, for carrying out desulfurization to yellow phosphorus electric furnace tail gas, including exhaust fan connected in sequence, desulfurizer and drop catcher；The outlet of denitrating system and desulphurization system is connected, cycles and connects with boiler, for inhibit exhaust combustion in the process with the NO during boiler heat exchangexGeneration.Yellow phosphoric tail gas boiler flue gas purification system of the present invention can during ensureing to effectively remove sulfide in yellow phosphoric tail gas, inhibiting exhaust combustion and boiler heat exchange NOxGeneration, while meeting environmental requirement, efficiently uses the thermal energy of yellow phosphoric tail gas, and improves the comprehensive utilization ratio of exhaust heat-energy, achievees the effect that reduce purifying exhausting gas of yellow phosphorus cost.
Description
Technical field
The present invention relates to purifying exhausting gas of yellow phosphorus fields, and in particular to a kind of yellow phosphoric tail gas boiler flue gas purification system and purification
Method.
Background technology
At present, it is domestic that phosphorus production is mainly carried out using electric furnace process, to save the thermal energy of high temperature yellow phosphoric tail gas, production unit
The yellow phosphoric tail gas that often electric furnace is generated is used as boiler oil gas.It is used as the combustion process of boiler oil gas in yellow phosphoric tail gas
In, the boiler smoke after burning to be made to meet environmental requirement, it is necessary to sulfide, the NO in yellow phosphorus tail gas combustion boiler flue gasx
Carry out purification removal processing.
The exhaust gas cleaner containing desulphurization and denitration typically uses the equipment such as washing, alkali cleaning to tail in conventional boiler system
Sulfide in gas is removed, to the NO in flue gasxUsing using ammonia process and SCR in denitration in the stove, but due to the fact that,
The flue gas that conventional desulfurization, the exhaust gas cleaner of denitration are difficult to directly generate yellow phosphorus tail gas combustion boiler carries out purifying place up to standard
Reason, meets environmental requirement：
1st, general desulfurizer can only purify SO2The inorganic sulfurs such as gas, to organic sulfur in complex compound without clean-up effect,
Easily reaction generates other sulfide and causes secondary pollution in the follow-up process.
2nd, general desulfurizer carries out desulfurization using washing, alkali cleaning；General denitrification apparatus uses urea, ammonium hydroxide and SCR (choosings
Selecting property catalysis reduction) etc. carry out denitration in the stove, can all make in respective process flue gas contact with water and in the reaction generate greatly
The water of amount, and contain a large amount of HF, PH in yellow phosphorus flue gas3、SO2、P2O5Gases are waited, hydrofluoric acid, sulfuric acid, sulfurous are generated after meeting water
The acidic materials such as acid, phosphoric acid, metaphosphoric acid, these acidic materials can form serious to generations such as boiler, smoke wind pipe and air-introduced machines
Electrochemical corrosion.
3rd, general desulphurization and denitration device is arranged at boiler export end, burns, after boiler heat exchange through burner to fuel
The flue gas discharged is purified, that is, first passes through boiler heat exchange, the conventional method of rear gas cleaning, but in phosphorus production, by
Containing substantial amounts of sour gas in yellow phosphoric tail gas, using the conventional method boiler heat exchange element can be caused to be subject in flue gas sour object
It corrodes, damages, influence boiler continuous and steady operation, while sulfur-containing smoke gas volume tail gas than before is formed after exhaust combustion
Volume is significantly increased, and processing cost is caused to rise.
For solution problem above, occur the research papers for yellow phosphoric tail gas catalytic sweetening method in recent years, but
Catalytic desulfurization and denitrification method complex procedures, the cost of state-of-the art are higher, it is difficult to carry out practical application；Simultaneously at this method
The purpose of reason tail gas is using the unstripped gas as one chemical industry of carbon after the CO purifications in tail gas, its chemical energy can only be used, using this
Method is far higher by the economic value that tail gas is used as fuel gas and is used, can not be applied to yellow phosphorus to the purification cost of vent gas treatment
The heat integration field of tail gas.
The content of the invention
For defect in the prior art, it is an object of the invention to provide a kind of yellow phosphoric tail gas boiler flue gas purifications
System and purification method can effectively reduce yellow phosphorus tail while sulfide, NOx purification removal effects in ensureing yellow phosphoric tail gas
The purification cost of steam pot kiln gas.
To achieve the above objectives, the present invention adopts the technical scheme that：
A kind of yellow phosphoric tail gas boiler flue gas purification system, for the yellow phosphorus electric furnace when yellow phosphoric tail gas is used as boiler oil gas
Tail gas and boiler combustion gas cleaning processing, including desulphurization system and denitrating system, the desulphurization system be arranged on the boiler with
Between the yellow phosphorus electric furnace, for carrying out desulfurization to the yellow phosphorus electric furnace tail gas；The denitrating system entrance and the desulfurization system
System outlet is connected, and the denitrating system and boiler cycle connect, for inhibit during exhaust combustion with during boiler heat exchange
NOxGeneration.
Based on the above technical solutions, the desulphurization system include exhaust fan connected in sequence, desulfurizer and
Drop catcher；
The denitrating system includes low nitrogen combustion apparatus connected in sequence, flue gas recirculation device, waste-heat recovery device, draws
Wind turbine and chimney；
The flue gas recirculation device includes overfire air fan connected in sequence and primary air fan, the overfire air fan air inlet
It is connected with pipeline at the boiler flue gas outlet, the overfire air fan forms circulating flue gas access with the boiler, described secondary
Fan outlet is also connected with the primary air fan air inlet；The primary air fan air outlet and the low nitrogen combustion apparatus phase
Even.
Based on the above technical solutions, the low nitrogen combustion apparatus is low NO.
Based on the above technical solutions, the desulfurizer includes the desulfurizing tower being sequentially connected, rich solution slot, regeneration
Pump, desulfurization pump, lean liquid tank, dosing tank and jet regeneration tank, the rich solution trench bottom are connected with the dosing tank, the desulfurization pump
With being connected at the top of the desulfurizing tower, a liquid level regulator is equipped between the jet regeneration tank and the lean liquid tank, the injection is again
Raw groove top portion is equipped with an injector, and the regeneration pump discharge is connected with the injector.
Based on the above technical solutions, it is purple to include tower body, demister, photocatalyst partition plate and anticorrosion for the desulfurizing tower
Outer lamp, the demister, photocatalyst partition plate and anticorrosion ultraviolet lamp are fixed on the tower body, the demister, photocatalyst every
Onboard to have sulphur removal photocatalyst, the anticorrosion ultraviolet lamp can irradiate sulphur removal photocatalyst.
Based on the above technical solutions, tail-gas deep cleaning equipment is further included, the tail gas depth cleaning equipment includes
Electrostatic precipitator, dephosphorization apparatus, fine de-sulfur equipment, the electrostatic precipitator, dephosphorization apparatus, fine de-sulfur equipment sequentially connect
It connects, the tail gas depth cleaning equipment is between desulfurizer and drop catcher.
The present invention also provides a kind of purifications of the yellow phosphoric tail gas boiler flue gas purification system based on described in as above any one
Method comprises the following steps：
S1, desulphurization system is set between the boiler and the yellow phosphorus electric furnace, is set in desulphurization system outlet de-
Nitre system adds in sulphur removal photocatalyst in the desulphurization system；
S2, yellow phosphorus electric furnace tail gas is introduced into the desulphurization system, treated that tail gas is passed through denitration by the desulphurization system
System, denitrating system are connected with boiler Xun Huan, i.e., described denitrating system is directly connected to by low nitrogen combustion apparatus and boiler, through low
Tail gas after nitrogen combustion apparatus burning discharges heat and forms high-temperature flue gas and exchange heat in the boiler, through a part of derived from boiler
Flue gas imports the flue gas recirculation device by circulation line again；
S3, by the denitrating system, treated that flue gas is passed through waste-heat recovery device, then imports chimney by air-introduced machine
After discharge.
Based on the above technical solutions, the desulphurization system include exhaust fan connected in sequence, desulfurizer and
Drop catcher；
The denitrating system includes low nitrogen combustion apparatus connected in sequence, flue gas recirculation device, waste-heat recovery device, draws
Wind turbine and chimney；The flue gas recirculation device include overfire air fan connected in sequence and primary air fan, the overfire air fan into
Air port is connected with pipeline at the boiler flue gas outlet, and the overfire air fan air outlet also connects with the primary air fan air inlet
It is logical；The primary air fan air outlet is connected with the low nitrogen combustion apparatus.
In the step S2, after yellow phosphorus electric furnace tail gas is sequentially passed through exhaust fan, desulfurizer and drop catcher, it is introduced into
Low nitrogen combustion apparatus burns, and discharges heat and forms high-temperature flue gas, and the part of smoke drawn from boiler sequentially passes through Secondary Air
Machine, primary air fan, into boiler and low NO, form flue gas recirculation；Another part flue gas drawn from boiler is sequentially
By being discharged after waste-heat recovery device, air-introduced machine and chimney.
Based on the above technical solutions, tail gas depth cleaning equipment, institute are set between boiler and the yellow phosphorus electric furnace
Stating tail gas depth cleaning equipment includes electrostatic precipitator, dephosphorization apparatus, fine de-sulfur equipment, the electrostatic precipitator, dephosphorization dress
Put, fine de-sulfur equipment is sequentially connected with, the tail gas depth cleaning equipment is between desulfurizer and drop catcher.
Compared with prior art, the advantage of the invention is that：
(1) yellow phosphoric tail gas boiler flue gas purification system of the invention can effectively recycle exhaust gas cleaner and exhaust heat-energy
System organically combines, can during ensureing to effectively remove sulfide in yellow phosphoric tail gas, inhibiting exhaust combustion and boiler heat exchange NOx
Generation, while environmental requirement is met, efficiently uses the thermal energy of yellow phosphoric tail gas, while reaches reduction purifying exhausting gas of yellow phosphorus cost
Effect.
(2) yellow phosphoric tail gas boiler flue gas purification system of the invention can be carried out at desulfurization yellow phosphoric tail gas before boiler combustion
Reason, more traditional to be compared to producing flue gas progress desulfurization after exhaust combustion, handled tolerance volume reduces more than 80%, contracting
Subtract the volume and material cost of desulfurizer, reduce further the overall cost of yellow phosphoric tail gas processing.
(3) yellow phosphoric tail gas boiler flue gas purification system and purification method of the invention can be to the yellow phosphoric tail gas before boiler combustion
It is handled with the yellow phosphorus flue gas after exhaust combustion, is removed respectively with photocatalyst catalytic elimination sulfide and low NO respectively
NOxMode carry out tail gas clean-up processing, avoid contact of the yellow phosphoric tail gas with water in overall process, mitigate purifying exhausting gas of yellow phosphorus and
Corrosion of the gas to boiler during heat energy utilization.
(4) yellow phosphoric tail gas boiler flue gas purification system of the invention is enclosed by low NO, flue gas recirculation device etc.
The setting of flue gas recirculation pipeline is formed around boiler, high-temperature flue gas can be repeated to low nitrogen burning, is promoted while reusing heat source
The thermal efficiency and NOxRemoval rate, reduce further yellow phosphoric tail gas processing overall cost.
(5) high-temperature flue gas through boiler emission is returned again by waste heat in yellow phosphoric tail gas boiler flue gas purification system of the invention
Receiving apparatus carries out thermal energy recycling, and the heat recycled improves the comprehensive utilization ratio of energy exhaust heat-energy for producing.
Description of the drawings
Fig. 1 is the structure diagram of yellow phosphoric tail gas boiler flue gas purification system in the embodiment of the present invention；
Fig. 2 is the apparatus figure of yellow phosphoric tail gas boiler smoke desufurization system in the embodiment of the present invention.
Wherein, 1- desulfurizing towers, 2- drop catchers, 3- rich solution slots, 4- regeneration pumps, 5- desulfurization pump, 6- lean liquid tanks, 7- dosing tanks,
8- dosing pumps, 9- jet regeneration tanks, 10- liquid level regulators, 11- injectors, 12- jet regeneration tanks, 13- anticorrosion ultraviolet lamps.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of yellow phosphoric tail gas boiler flue gas purification system, in yellow phosphorus tail
Yellow phosphorus electric furnace tail gas and boiler combustion gas cleaning when gas is used as boiler oil gas are handled, including desulphurization system and denitration system
System, desulphurization system are arranged between boiler and the yellow phosphorus electric furnace, for carrying out desulfurization to yellow phosphorus electric furnace tail gas；Denitrating system entrance
Be connected with desulphurization system outlet, denitrating system and boiler cycle connect, for inhibit exhaust combustion in the process with boiler heat exchange mistake
NO in journeyxGeneration.
Denitrating system is connected with boiler Xun Huan, and referring to the connecting line of denitrating system and boiler includes at least one cycling
Circuit, the air inlet of boiler and gas outlet are all connected to the device in denitrating system, and boiler exit gas mouth extension flue gas can
It is exchanged heat again in denitrating system by being returned to after circulation loop through boiler air inlet in boiler.As in the present embodiment, boiler-
Overfire air fan-boiler forms first circulation loop, and boiler-overfire air fan-primary air fan-low NO-boiler forms the
Two circulation loops.
Wherein, desulphurization system may be configured as exhaust fan connected in sequence, desulfurizer and drop catcher；Denitrating system can be set
It is set to low nitrogen combustion apparatus connected in sequence, flue gas recirculation device, waste-heat recovery device, air-introduced machine and chimney；Flue gas follows again
Loop device includes overfire air fan connected in sequence and primary air fan, overfire air fan air inlet and pipeline phase at boiler flue gas outlet
Even, overfire air fan forms circulating flue gas access with boiler, and overfire air fan air outlet is also connected with primary air fan air inlet；First air
Machine air outlet is connected with low nitrogen combustion apparatus.
Low nitrogen combustion apparatus can be arranged to a low NO, which, which can realize, ensures that fuel stabilization catches fire
The processes such as the completely burned of burning and fuel, and inhibit NO in combustion processxGrowing amount.It is described in patent application document
Low NO and the preceding Chinese patent application of our company " for the burner for the yellow phosphoric tail gas that burns " described in it is consistent.
Preferably, as shown in Fig. 2, desulfurizer can be arranged to the desulfurizing tower being sequentially connected, rich solution slot, regeneration pump, de-
Sulphur pump, lean liquid tank, dosing tank and jet regeneration tank, and rich solution trench bottom is connected with dosing tank, desulfurization pump and desulfurizing tower top
It is connected, liquid level regulator between jet regeneration tank and lean liquid tank is set, an injector is set at the top of jet regeneration tank, will be regenerated
Pump discharge is connected with the injector.
Desulfurizing tower includes tower body, demister, photocatalyst partition plate and anticorrosion ultraviolet lamp, demister, photocatalyst partition plate and anti-
Corrosion ultraviolet lamp is fixed on tower body, and demister, photocatalyst partition plate are loaded with sulphur removal photocatalyst, and anticorrosion ultraviolet lamp being capable of irradiation light
The sulphur removal photocatalyst placed on catalyst partition plate.
Can tail-gas deep cleaning equipment be set in yellow phosphorus electric furnace and tail gas boiler room, tail-gas deep cleaning equipment includes electrostatic
Dust-extraction unit, dephosphorization apparatus, fine de-sulfur equipment, electrostatic precipitator, dephosphorization apparatus, fine de-sulfur equipment are sequentially connected with, and tail gas is deep
Cleaning equipment further promotes yellow phosphorus electric furnace tail gas clean-up treatment effect between desulfurizer and drop catcher.
The embodiment of the present invention also provides a kind of yellow phosphorus tail based on yellow phosphoric tail gas boiler flue gas purification system as described above
Gas boiler flue gas purifying method, comprises the following steps：
S1, desulphurization system between boiler and yellow phosphorus electric furnace is set, is set in desulphurization system outlet, boiler flue gas outlet de-
Nitre system adds in sulphur removal photocatalyst in desulphurization system；
S2, yellow phosphorus electric furnace tail gas is introduced into desulphurization system, treated that tail gas is passed through denitrating system, denitration by desulphurization system
System is connected with boiler Xun Huan, and specific connection mode fills to be directly connected to by low nitrogen combustion apparatus and boiler through low nitrogen burning
The tail gas after burning is put, discharge heat and forms high-temperature flue gas and exchanges heat in the boiler, the part of smoke after boiler comes out is again
Flue gas recirculation device is imported by circulator；
S3, the high-temperature flue gas gone out after denitrating system processing by boiler emission is carried out again by waste-heat recovery device
Heat-energy secondary recycles, and the heat recycled improves the comprehensive utilization ratio of energy exhaust heat-energy for producing.
S4, by the denitrating system, treated that flue gas is passed through after waste-heat recovery device carries out heat-energy secondary recycling, then
Drainage is ultimately discharged into chimney.
It, can be further according to the improvement of actual device and set-up mode to the net of yellow phosphoric tail gas and boiler smoke in step S2
Change method does adaptation adjustment, after yellow phosphorus electric furnace tail gas such as is sequentially passed through exhaust fan, desulfurizing tower and drop catcher, is introduced into low nitrogen
Burner burns, and discharges heat and forms high-temperature flue gas, and the part of smoke drawn from boiler sequentially passes through overfire air fan, one
Secondary wind turbine, into boiler and low NO, form cycle；Another part flue gas drawn from boiler sequentially passes through waste heat and returns
It is discharged after receiving apparatus, air-introduced machine and chimney.It can so use and be inhibited with photocatalyst catalytic elimination sulfide and low NO respectively
NOxThe mode of generation carries out tail gas clean-up processing, and contact of the yellow phosphoric tail gas with water is avoided in overall process, and it is net to mitigate yellow phosphoric tail gas
Change and corrosion of the gas to boiler during heat energy utilization.
In the present embodiment, the improved procedure of above equipment is in yellow phosphorus electric furnace and tail gas boiler room tail gas purification deeply to be set to set
It is standby.Tail gas depth cleaning equipment include electrostatic precipitator, dephosphorization apparatus, fine de-sulfur equipment, electrostatic precipitator, dephosphorization apparatus,
Fine de-sulfur equipment is sequentially connected with, and tail gas depth cleaning equipment is between desulfurizer and drop catcher.It therefore can be in the present embodiment
In yellow phosphoric tail gas purifying method for boiler fume step S2, by yellow phosphorus electric furnace tail gas pass sequentially through electrostatic precipitator, dephosphorization apparatus,
Fine de-sulfur equipment, to achieve the purpose that further enhance tail gas clean-up effect.Similarly, other are carried out according to system equipment variation
Logical step change is all included in the scope of the present invention.
Yellow phosphoric tail gas and exhaust combustion pot are carried out in yellow phosphoric tail gas boiler flue gas purification system provided in an embodiment of the present invention
During kiln gas, yellow phosphorus electric furnace generates processing of the tail gas Jing Guo desulfurization-low nitrogen burning-boiler heat exchange-denitration-waste heat recovery
Flow had both effectively raised the heat integration rate of yellow phosphoric tail gas, further through the reasonable setting of desulfurizer position so that
The technique is more traditional to be compared to producing flue gas progress sulfur removal technology after exhaust combustion, and handled tolerance volume reduces 80%
More than, the volume of desulfurizer is greatly reduced and material cost reduces further purifying exhausting gas of yellow phosphorus cost.
Meanwhile the water to yellow phosphoric tail gas or combustion product gases is avoided by the setting of special sulphur removal photocatalyst in the present invention
It washes, alkali cleaning processing, is shortening technological process, while reducing desulphurization cost, mitigate flue gas during yellow phosphoric tail gas heat energy utilization
Corrosion to boiler.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
On the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (9)
1. a kind of yellow phosphoric tail gas boiler flue gas purification system, for the yellow phosphorus electric furnace tail when yellow phosphoric tail gas is used as boiler oil gas
Gas and boiler combustion gas cleaning processing, it is characterised in that：Including desulphurization system and denitrating system, the desulphurization system is arranged on institute
It states between boiler and the yellow phosphorus electric furnace, for carrying out desulfurization to the yellow phosphorus electric furnace tail gas；The denitrating system entrance and institute
It states desulphurization system outlet to be connected, the denitrating system is connected with boiler Xun Huan, for inhibiting to change with boiler during exhaust combustion
NO in thermal processxGeneration.
2. yellow phosphoric tail gas boiler flue gas purification system as described in claim 1, it is characterised in that：The desulphurization system includes suitable
Exhaust fan, desulfurizer and the drop catcher of secondary connection；
The denitrating system includes low nitrogen combustion apparatus connected in sequence, flue gas recirculation device, waste-heat recovery device, air-introduced machine
And chimney；
The flue gas recirculation device includes overfire air fan connected in sequence and primary air fan, the overfire air fan air inlet and institute
It states pipeline at boiler flue gas outlet to be connected, the overfire air fan forms circulating flue gas access, the overfire air fan with the boiler
Air outlet is also connected with the primary air fan air inlet；The primary air fan air outlet is connected with the low nitrogen combustion apparatus.
3. yellow phosphoric tail gas boiler flue gas purification system as described in claim 1, it is characterised in that：The low nitrogen combustion apparatus is
Low NO.
4. yellow phosphoric tail gas boiler flue gas purification system as described in claim 1, it is characterised in that：The desulfurizer includes suitable
Secondary connected desulfurizing tower, rich solution slot, regeneration pump, desulfurization pump, lean liquid tank, dosing tank and jet regeneration tank, the rich solution trench bottom
It is connected with the dosing tank, the desulfurization pump at the top of the desulfurizing tower with being connected, between the jet regeneration tank and the lean liquid tank
Equipped with a liquid level regulator, an injector, the regeneration pump discharge and the injector phase are equipped at the top of the jet regeneration tank
Even.
5. yellow phosphoric tail gas boiler flue gas purification system as claimed in claim 4, it is characterised in that：The desulfurizing tower includes tower
Body, demister, photocatalyst partition plate and anticorrosion ultraviolet lamp, the demister, photocatalyst partition plate and anticorrosion ultraviolet lamp are fixed on
On the tower body, the demister, photocatalyst partition plate are loaded with sulphur removal photocatalyst, and the anticorrosion ultraviolet lamp can irradiate sulphur removal light
Catalyst.
6. yellow phosphoric tail gas boiler flue gas purification system as described in claim 1, it is characterised in that：Further include tail-gas deep purification
Equipment, the tail gas depth cleaning equipment include electrostatic precipitator, dephosphorization apparatus, fine de-sulfur equipment, the electrostatic precipitator,
Dephosphorization apparatus, fine de-sulfur equipment are sequentially connected with, and the tail gas depth cleaning equipment is between desulfurizer and drop catcher.
7. a kind of purification method based on yellow phosphoric tail gas boiler flue gas purification system as claimed in any one of claims 1 to 6,
It is characterised in that it includes following steps：
S1, desulphurization system is set between the boiler and the yellow phosphorus electric furnace, is exported in the desulphurization system and denitration system is set
System adds in sulphur removal photocatalyst in the desulphurization system；
S2, yellow phosphorus electric furnace tail gas is introduced into the desulphurization system, by the desulphurization system, treated that tail gas is passed through denitrating system,
Denitrating system is connected with boiler Xun Huan, i.e., described denitrating system is directly connected to by low nitrogen combustion apparatus and boiler, is fired through low nitrogen
The tail gas after device burning is burnt, discharge heat and forms high-temperature flue gas and exchanges heat in the boiler, through part of smoke derived from boiler
The flue gas recirculation device is imported by circulation line again；
S3, by the denitrating system, treated that flue gas is passed through waste-heat recovery device, then passes through air-introduced machine and imports chimney heel row
Go out.
8. a kind of yellow phosphoric tail gas purifying method for boiler fume as claimed in claim 7, it is characterised in that：The desulphurization system bag
Include exhaust fan connected in sequence, desulfurizer and drop catcher；
The denitrating system includes low nitrogen combustion apparatus connected in sequence, flue gas recirculation device, waste-heat recovery device, air-introduced machine
And chimney；The flue gas recirculation device includes overfire air fan connected in sequence and primary air fan, the overfire air fan air inlet
It is connected with pipeline at the boiler flue gas outlet, the overfire air fan air outlet is also connected with the primary air fan air inlet；Institute
Primary air fan air outlet is stated with the low nitrogen combustion apparatus to be connected；
In the step S2, after yellow phosphorus electric furnace tail gas is sequentially passed through exhaust fan, desulfurizer and drop catcher, low nitrogen is introduced into
Burner burns, and discharges heat and forms high-temperature flue gas, and the part of smoke drawn from boiler sequentially passes through overfire air fan, one
Secondary wind turbine, into boiler and low NO, form flue gas recirculation；Another part flue gas drawn from boiler sequentially passes through remaining
It is discharged after heat reclamation device, air-introduced machine and chimney.
9. a kind of yellow phosphoric tail gas purifying method for boiler fume as claimed in claim 7, it is characterised in that：In boiler and the Huang
Tail gas depth cleaning equipment is set between phosphorus electric furnace, and it is de- that the tail gas depth cleaning equipment includes electrostatic precipitator, dephosphorization apparatus, essence
Sulphur equipment, the electrostatic precipitator, dephosphorization apparatus, fine de-sulfur equipment are sequentially connected with, and the tail gas depth cleaning equipment is located at de-
Between sulphur device and drop catcher.
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| CN201711065046.1A CN108050850B (en) | 2017-11-02 | 2017-11-02 | Yellow phosphorus tail gas boiler flue gas purification system and purification method |
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| CN112393229A (en) * | 2020-10-16 | 2021-02-23 | 雷波凯瑞磷化工有限责任公司 | Boiler capable of reducing nitrogen oxide emission during combustion of yellow phosphorus tail gas |
| CN116510497A (en) * | 2023-06-26 | 2023-08-01 | 昆明理工大学 | Method and system for removing sulfur, phosphorus and nitrogen oxides in yellow phosphorus tail gas boiler by using phosphorus ore powder |
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| CN108050850B (en) | 2020-06-02 |
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