CN110433628A - A kind of System and method for of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury - Google Patents
A kind of System and method for of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury Download PDFInfo
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- CN110433628A CN110433628A CN201910639015.5A CN201910639015A CN110433628A CN 110433628 A CN110433628 A CN 110433628A CN 201910639015 A CN201910639015 A CN 201910639015A CN 110433628 A CN110433628 A CN 110433628A
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- flue
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- coal
- absorbent
- sulphur nitre
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 239000003546 flue gas Substances 0.000 title claims abstract description 51
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 38
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 36
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000005864 Sulphur Substances 0.000 title claims abstract description 30
- 239000002250 absorbent Substances 0.000 claims abstract description 33
- 230000002745 absorbent Effects 0.000 claims abstract description 33
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 14
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims abstract description 10
- 229960002218 sodium chlorite Drugs 0.000 claims abstract description 10
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 7
- 239000000292 calcium oxide Substances 0.000 claims abstract description 7
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000007800 oxidant agent Substances 0.000 claims description 35
- 230000001590 oxidative effect Effects 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 239000003344 environmental pollutant Substances 0.000 claims description 8
- 231100000719 pollutant Toxicity 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000005243 fluidization Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- -1 boiler (1) Chemical compound 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- UGDGKPDPIXAUJL-UHFFFAOYSA-N ethyl n-[4-[benzyl(2-phenylethyl)amino]-2-(4-ethylphenyl)-1h-imidazo[4,5-c]pyridin-6-yl]carbamate Chemical compound N=1C(NC(=O)OCC)=CC=2NC(C=3C=CC(CC)=CC=3)=NC=2C=1N(CC=1C=CC=CC=1)CCC1=CC=CC=C1 UGDGKPDPIXAUJL-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 239000008139 complexing agent Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000001925 catabolic effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—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
-
- 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
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- 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
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/108—Halogens or halogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- 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
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; 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
- F23J2215/00—Preventing emissions
- F23J2215/60—Heavy metals; 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
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/40—Intercepting solids by cyclones
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- 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
- F23J2219/50—Sorption with semi-dry devices, e.g. with slurries
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The invention discloses a kind of System and method fors of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury, belong to industrial waste gas purifying environmental protection and energy field.Present system includes boiler, and boiler is connected to by flue with semidry method reactor, and semidry method reactor is connect with cyclone separator, and cyclone separator is connect with deduster, and deduster is connected to by air-introduced machine with chimney.The present invention is classified NO and Hg in oxidation coal-fired flue-gas by sodium chlorite, then the sulphur nitre mercury in flue gas is absorbed as absorbent in circulating fluid bed semi-drying method reactor using quick lime, then the integrated high-efficiency cooperation-removal of dirt sulphur nitre mercury is realized in bag filter, have many advantages, such as simple and reliable system, investment and operating cost is low, occupied area is small, good economic benefit and environmental benefit can be generated.
Description
Technical field
The invention belongs to industrial waste gas purifying environmental protection and energy field, in particular to a kind of coal-fired flue-gas dirt sulphur nitre mercury one
Change the System and method for of cooperation-removal.
Background technique
Energy resource structure of the China based on coal will not change within the long duration, therefore, control the cigarette in coal-fired flue-gas
Dirt, SO2、SO3, the pollutant emissions such as NOx, Hg be China's control atmosphere pollution an important process.Enter industrial application at present
Coal-fired flue-gas pollutant catabolic gene method include SCR denitration, lime stone~gypsum wet desulfurization, electric precipitator, bag filter,
Thus activated carbon adsorption demercuration etc. brings combustion although the superposition use of various technologies can effectively control Pollutant emission concentration
The problems such as coal-fired plant's environmental protection facility is invested and is taken up a large area, operating cost is high, operation and maintenance amount is big.Therefore, energy is developed
The technology for enough realizing the integrative coordinated removing of dirt sulphur nitre mercury, is that current coal-fired flue-gas Pollutant Control Technology field is urgently to be resolved
Technical problem.
Chinese patent related to the present invention, such as 103566725 B of CN --- a kind of " circulating fluid bed semi-drying method joint
Desulfurization denitration demercuration device and method ", it is to be aoxidized to the NO and Hg in flue gas, then by spraying into ozone into flue
It realizes and removes into circulating fluid bed semi-drying method reactor.But existed in practical engineering applications using ozone as oxidant
Oxidant utilization efficiency is not high, the excessively high problem of system energy consumption cost.
For another example 101785965 B of CN --- " a kind of complexed absorption circulation half dry desulphurization system denitrification integral process and dress
Set ", it is the SO sprayed by elder generation into flue gas in alkaline complexing agent absorption flue gas2It is half-dried subsequently into recirculating fluidized bed with NO
Method reactor realizes removing.But the alkalinity complexing agent is only to SO2There is complexed absorption effect with NO, and to being not easy to remove in flue gas
Hg do not have absorption, cannot achieve effective removing of Hg.
Summary of the invention
The purpose of the present invention is being used for the superposition of current coal-burning power plant's environmental protection facility, invests and take up a large area, runs
Costly, the problems such as operation and maintenance amount is big, propose the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury a kind of with
Method.
Technical solution used by the present invention solves the above problems is: a kind of coal-fired flue-gas dirt sulphur nitre mercury is integrative coordinated de-
The system removed, including boiler, characterized in that the boiler is connected to by flue with semidry method reactor, the semidry method reaction
Device is connect with cyclone separator, and the cyclone separator is connect with deduster, and the deduster is connected to by air-introduced machine with chimney；
Oxidant nozzle is provided in the flue and semidry method reactor, the oxidant nozzle and oxidizing agent solution tank pass through pipe
Road connection；Absorbent nozzle is additionally provided in the semidry method reactor, the absorbent nozzle and absorbent tank pass through pipeline
Connection, the absorbent tank are connected to cyclone separator by pipeline；The cyclone separator and deduster are connected to grey library.
Further, in semidry method reactor, the oxidant nozzle be provided with it is multiple, and multiple oxidant nozzles from
Top to bottm layered arrangement.
Further, the lower section of oxidant nozzle is arranged in the absorbent nozzle, and oxidant nozzle is located at semidry method
The top of the gas inlet of reactor.
The working method of the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury is as follows, and flue gas is arranged from boiler
After out, pre-oxidation occurs with the oxidant of penetrating first in flue, subsequently into semidry method reactor；In absorbent tank
Absorbent through compressed air spray into semidry method reactor in, under the action of flue gas be in suspension fluidization state, adsorb sulphur nitre mercury；
Oxidant sprays into semidry method reactor through oxidant nozzle staged atomization, makes the sulphur nitre mercury in flue gas that oxidation reaction occur, promotees
Into the absorption of absorbent；Flue gas enters back into cyclone separator and isolates most of solid particle after the discharge of semidry method reactor,
The solid particle isolated largely reenters absorbent tank recycling, and remaining solid particle passes through pneumatic conveying to ash
Library；Flue gas subsequently enters bag filter and is dusted, simultaneous removing sulphur nitre mercury, then enters chimney through air-introduced machine, final to realize
Pollutant discharge in compliance with the standard.
Further, the oxidant is sodium chlorite, and absorbent is quick lime.
Further, the sodium chlorite solution's pH value sprayed into flue controls between 3~6, rubs with nitre mercury in flue gas
You are than control between 0.5~1.
Further, the sodium chlorite solution's pH value sprayed into semidry method reactor controls between 1~3, in flue gas
The molar ratio of nitre mercury controls between 1~3.
Further, the molar ratio of the quick lime and sulfureous in flue gas nitre that spray into semidry method reactor is controlled 1.1~2.0
Between.
Further, the separative efficiency of the cyclone separator is 99% or more, the solid particle that cyclone separator is isolated
In there is 80%~90% to reenter absorbent tank, remaining solid particle passes through pneumatic conveying to grey library.
Compared with prior art, the present invention having the following advantages that and effect:, can be to the dirt sulphur in flue gas by above system
The pollutants such as nitre mercury carry out integrative coordinated removing, have system is simple and reliable, investment and operating cost are low, occupied area is small etc.
Advantage can generate good economic benefit and environmental benefit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
In figure: boiler 1, flue 2, semidry method reactor 3, cyclone separator 4, deduster 5, air-introduced machine 6, chimney 7, oxidation
Agent solution tank 8, grey library 9, oxidant nozzle 10, absorbent nozzle 11, absorbent tank 12.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Referring to Fig. 1, the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury in the present embodiment, including boiler 1, pot
Furnace 1 is connected to by flue 2 with semidry method reactor 3, and semidry method reactor 3 is connect with cyclone separator 4, cyclone separator 4 and
Deduster 5 connects, and deduster 5 is connected to by air-introduced machine 6 with chimney 7；Oxidation is provided in flue 2 and semidry method reactor 3
Agent nozzle 10, oxidant nozzle 10 are connected to oxidizing agent solution tank 8 by pipeline；Absorption is additionally provided in semidry method reactor 3
Agent nozzle 11, absorbent nozzle 11 are connected to absorbent tank 12 by pipeline, and absorbent tank 12 and cyclone separator 4 pass through pipeline
Connection；In semidry method reactor 3, oxidant nozzle 10 is provided with multiple, and multiple oxidant nozzles 10 are layered from top to bottom
Arrangement；The lower section of oxidant nozzle 10 is arranged in absorbent nozzle 11, and oxidant nozzle 10 is located at the cigarette of semidry method reactor 3
The top of gas import；Cyclone separator 4 and deduster 5 are connected to grey library 9.
Working method is as follows, and flue gas pre-oxidizes in flue 2 with the oxidant of penetrating first after the discharge of boiler 1
Reaction, subsequently into semidry method reactor 3；Absorbent in absorbent tank 12 sprays into semidry method reactor 3 through compressed air,
It is in suspension fluidization state under the action of flue gas, adsorbs sulphur nitre mercury；Oxidant sprays into half-dried through 10 staged atomization of oxidant nozzle
In method reactor 3, makes the sulphur nitre mercury in flue gas that oxidation reaction occur, promote the absorption of absorbent；Flue gas is from semidry method reactor 3
After discharge, enters back into cyclone separator 4 and isolate most of solid particle, the solid particle isolated largely reenters suction
It receives agent tank 12 to be recycled, remaining solid particle passes through pneumatic conveying to grey library 9；Flue gas subsequently enter bag filter 5 into
Row dedusting, simultaneous removing sulphur nitre mercury, then enter chimney 7 through air-introduced machine 6, finally realize pollutant discharge in compliance with the standard.
Wherein, oxidant is sodium chlorite, and absorbent is quick lime.
The sodium chlorite solution's pH value sprayed into flue 2 controls between 3~6, controls with the molar ratio of nitre mercury in flue gas
Between 0.5~1.
The sodium chlorite solution's pH value sprayed into semidry method reactor 3 controls between 1~3, rubs with nitre mercury in flue gas
You are than control between 1~3.
The molar ratio of the quick lime and sulfureous in flue gas nitre that spray into semidry method reactor 3 controls between 1.1~2.0.
The separative efficiency of cyclone separator 4 is 99% or more, have 80% in the solid particle that cyclone separator 4 is isolated~
90% reenters absorbent tank 12, and remaining solid particle passes through pneumatic conveying to grey library 9.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology should belong to guarantor of the invention in made change without departing from the spirit and scope of the invention
Protect range.
Claims (9)
1. a kind of system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury, including boiler (1), characterized in that the boiler
(1) it is connected to by flue (2) with semidry method reactor (3), the semidry method reactor (3) connect with cyclone separator (4), institute
It states cyclone separator (4) to connect with deduster (5), the deduster (5) is connected to by air-introduced machine (6) with chimney (7)；The cigarette
It is provided with oxidant nozzle (10) in road (2) and semidry method reactor (3), the oxidant nozzle (10) and oxidizing agent solution
Tank (8) is connected to by pipeline；It is additionally provided with absorbent nozzle (11) in the semidry method reactor (3), the absorbent nozzle
(11) it is connected to absorbent tank (12) by pipeline, the absorbent tank (12) is connected to cyclone separator (4)；The whirlwind point
It is connected to grey library (9) from device (4) and deduster (5).
2. the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury according to claim 1, characterized in that half-dried
In method reactor (3), the oxidant nozzle (10) is provided with multiple, and multiple oxidant nozzles (10) are layered cloth from top to bottom
It sets.
3. the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury according to claim 2, characterized in that the suction
It receives agent nozzle (11) to be arranged in the lower section of oxidant nozzle (10), and oxidant nozzle (10) is located at semidry method reactor (3)
The top of gas inlet.
4. a kind of system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury according to any one of claims 1 to 3
Working method, characterized in that after flue gas is discharged from boiler (1), pre-oxidized first in flue (2) with the oxidant sprayed into
Reaction, subsequently into semidry method reactor (3)；Absorbent in absorbent tank (12) sprays into semidry method reactor through compressed air
(3) in, it is in suspension fluidization state under the action of flue gas, adsorbs sulphur nitre mercury；Oxidant is through oxidant nozzle (10) staged atomization
It sprays into semidry method reactor (3), makes the sulphur nitre mercury in flue gas that oxidation reaction occur, promote the absorption of absorbent；Flue gas is from partly
After dry process reaction device (3) discharge, enters back into cyclone separator (4) and isolate most of solid particle, the solid particle isolated
Major part reenters absorbent tank (12) recycling, and remaining solid particle passes through pneumatic conveying to grey library (9)；Flue gas with
Enter bag filter (5) afterwards to be dusted, simultaneous removing sulphur nitre mercury, then enters chimney (7) through air-introduced machine (6), it is final to realize
Pollutant discharge in compliance with the standard.
5. the working method of the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury according to claim 4, special
Sign is that the oxidant is sodium chlorite, and absorbent is quick lime.
6. the working method of the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury according to claim 5, special
Sign is that the sodium chlorite solution's pH value sprayed into flue (2) controls between 3~6, and the molar ratio control with nitre mercury in flue gas exists
Between 0.5~1.
7. the working method of the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury according to claim 5, special
Sign is that sodium chlorite solution's pH value in penetrating semidry method reactor (3) controls mole between 1~3, with nitre mercury in flue gas
Than controlling between 1~3.
8. the working method of the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury according to claim 5, special
Sign is that the molar ratio of the quick lime and sulfureous in flue gas nitre that spray into semidry method reactor (3) controls between 1.1~2.0.
9. the working method of the system of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury according to claim 4, special
Sign is that the separative efficiency of the cyclone separator (4) is 99% or more, is had in the solid particle that cyclone separator (4) is isolated
80%~90% reenters absorbent tank (12), and remaining solid particle passes through pneumatic conveying to grey library (9).
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| CN201910639015.5A CN110433628A (en) | 2019-07-16 | 2019-07-16 | A kind of System and method for of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury |
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| CN201910639015.5A CN110433628A (en) | 2019-07-16 | 2019-07-16 | A kind of System and method for of the integrative coordinated removing of coal-fired flue-gas dirt sulphur nitre mercury |
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| CN112058050A (en) * | 2020-09-16 | 2020-12-11 | 广东佳德环保科技有限公司 | Desulfurization and denitrification system device and method adopting ozone oxidation and semidry method |
| CN113019092A (en) * | 2021-02-06 | 2021-06-25 | 唐山钢铁集团有限责任公司 | Flue gas desulfurization and denitrification method and system based on dense-phase semi-dry method |
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