CN106994287A - A kind of system and method for coal fired power plant flue gas dry desulfurizing denitration - Google Patents
A kind of system and method for coal fired power plant flue gas dry desulfurizing denitration Download PDFInfo
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- CN106994287A CN106994287A CN201710329941.3A CN201710329941A CN106994287A CN 106994287 A CN106994287 A CN 106994287A CN 201710329941 A CN201710329941 A CN 201710329941A CN 106994287 A CN106994287 A CN 106994287A
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- flue gas
- activated coke
- desulfurizing tower
- tower
- regenerator
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- 239000003546 flue gas Substances 0.000 title claims abstract description 87
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 72
- 239000003245 coal Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000571 coke Substances 0.000 claims abstract description 98
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 83
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 40
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 38
- 230000023556 desulfurization Effects 0.000 claims abstract description 35
- 239000003054 catalyst Substances 0.000 claims abstract description 34
- 239000000779 smoke Substances 0.000 claims abstract description 33
- 230000006698 induction Effects 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 20
- 238000001179 sorption measurement Methods 0.000 claims abstract description 18
- 230000008929 regeneration Effects 0.000 claims abstract description 14
- 238000011069 regeneration method Methods 0.000 claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 30
- 230000000694 effects Effects 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 231100000719 pollutant Toxicity 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
- 238000005070 sampling Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000011949 solid catalyst Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
-
- 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
- B01D53/60—Simultaneously removing sulfur oxides and 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
- B01D53/86—Catalytic 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
- B01D53/86—Catalytic processes
- B01D53/8637—Simultaneously removing sulfur oxides and 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
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
-
- 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
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of system and method for coal fired power plant flue gas dry desulfurizing denitration, system includes desulfurization adsorption system, denitration also original system, active coke regeneration system, activated coke induction system, flue gas system and ammonia hybrid system；Desulfurization adsorption system is the desulfurizing tower filled with activated coke, denitration also original system is the denitrating tower filled with carbon base catalyst, active coke regeneration system is activated coke regenerator, activated coke induction system includes activated coke after absorption being delivered to the first induction system of regenerator from desulfurizing tower and activated coke that regenerator is lived again is delivered to the second induction system of desulfurizing tower from regenerator, flue gas system includes the flue gas blower fan that flue gas is delivered to desulfurizing tower smoke inlet, and ammonia hybrid system includes being used to mixing ammonia into the first ammonia hybrid system and the second ammonia hybrid system into flue gas.System and method of the present invention can realize the desulphurization denitration of flue gas, and desulfurization and denitration are separately carried out, and denitration after first desulfurization, it is ensured that collaboration high-efficiency desulfurization and denitration.
Description
Technical field
The invention belongs to environmental technology field, it is related to the purified treatment of coal fired power plant flue gas, and in particular to one kind is used to fire
The system and method for coal generating plant flue gas dry desulfurization denitration.
Background technology
Activated coke (or activated carbon) is by having formed by the techniques such as coal blending, shaping, charing, activation by raw material of coal
There is the particulate matter of adsoption catalysis function.Carbon base catalyst is that based on activated coke, active component is added by early stage coal blending, is adjusted
Become pore passage structure and modified surface functional group, being formed has high catalytic activity, high selectivity, the new catalyst of high intensity.
Active coke desulphurizing technological principle is based on SO2SO in characterization of adsorption on activated coke surface, flue gas2At 110-150 DEG C
At a temperature of, occur chemical reaction generation sulfuric acid absorption in activated coke hole with the oxygen in flue gas, vapor, reaction equation is such as
Under：
SO2+1/2O2+H2O=H2SO4+178.4KJ/mol
SO3+H2O→H2SO4+79.5kJ
Carbon base catalyst denitrating technique principle is to utilize its catalysis characteristics, and a small amount of NH is configured in flue gas3, promote NO
Selective catalytic reduction reaction generates harmless N2Directly discharge, carbon base catalyst only plays a part of catalyst, without regeneration
Its catalysis can be played, reaction equation is as follows：
NO+NH3+1/4H2O=N2+3/2H2O-407.9KJ/mol
NO2+2NH3+1/2O2=3/2N2+3H2O-699.594KJ/mol
Gas-solid catalyst reactor can use fluid bed, fixed bed and moving bed.Moving bed be divided into again cross-flow bed and following current,
Adverse current bed.Fluid bed is to the abrasion of activated coke/carbon base catalyst than larger.The small and fluid of solid abrasion in fixed bed reactors
Flowing is close to laminar flow, and reaction speed is fast, but it is poor to conduct heat, it is impossible to constantly regenerating continuous operation.
Simultaneously containing SO in coal fired power plant flue gas2、SO3、NO、NO2, how using set of system and method simultaneously by SO2、SO3、
NO、NO2Efficient removal, so as to meet the problem of flue gas minimum discharge environmental requirement is primarily solved as each power plant's environmental transformation.
The content of the invention
To realize high efficiency desulphurization denitration, the environmental requirement of power plant's minimum discharge is met, the first object of the present invention is
A kind of system for coal fired power plant flue gas dry desulfurizing denitration is provided, the second purpose is to provide one kind using the system to cigarette
The method that gas carries out dry desulfurization denitration, realizes efficient, the disposable removing of sulfureous in flue gas and nitre.
Above-mentioned purpose is achieved by the following technical solution：
A kind of system for coal fired power plant flue gas dry desulfurizing denitration, including desulfurization adsorption system, denitration also original system,
Active coke regeneration system, activated coke induction system, flue gas system and ammonia hybrid system；
The desulfurization adsorption system is the desulfurizing tower filled with activated coke, and top is activated coke entrance, and bottom is activated coke
Outlet, bottom is provided with smoke inlet, and top is provided with exhanst gas outlet；
The denitration also original system is the denitrating tower filled with carbon base catalyst, and right side is smoke inlet, and left side is flue gas
Outlet；
The active coke regeneration system is activated coke regenerator；
The activated coke induction system includes the first delivery system that activated coke after absorption is delivered to regenerator from desulfurizing tower
System and the activated coke that regenerator is lived again are delivered to the second induction system of desulfurizing tower from regenerator, and the first induction system is communicated in
The activated coke outlet of desulfurizing tower and regenerator top entry, the second induction system are communicated in regenerator outlet at bottom and desulfurizing tower
Activated coke entrance, the first induction system, the second induction system include conveyer and conveyance conduit respectively；
The flue gas system includes the flue gas blower fan that flue gas is delivered to desulfurizing tower smoke inlet, and desulfurizing tower and denitration
The flue after flue, denitrating tower exhanst gas outlet between tower；
The ammonia hybrid system includes being used to mixing ammonia into the first ammonia hybrid system and the second ammonia mixing into flue gas
System, the first ammonia hybrid system is located between flue gas blower fan and desulfurizing tower smoke inlet, and the second ammonia hybrid system is located at desulfurizing tower
Between exhanst gas outlet and denitrating tower smoke inlet.
Denitrification process is necessarily required to mix appropriate ammonia into flue gas, while those skilled in the art think sweetening process simultaneously
Ammonia is not needed, but it is a discovery of the invention that a small amount of ammonia is mixed in the forward direction flue gas of desulfurization can be particularly helpful to improve desulfurization
Rate.
Preferably, the desulfurizing tower is a kind of three storehouse body structure, is from left to right divided into cup, middle room, rear chamber, cup,
Sieve plate is provided between middle room, rear chamber and is respectively communicated with activated coke entrance and the activated coke outlet of desulfurizing tower, its smoke inlet, cigarette
Gas outlet is respectively located at cup, rear chamber side.Desulfurizing tower from left to right direction, is divided into cup, middle room, rear chamber three work of formation
Property coke bin, have sieve plate between each room, flue gas can pass through, each room uses single batcher discharge, batcher passes through frequency conversion control
Speed processed is adjustable, and each room can set the holdup time of activated coke respectively and can set the optimal holdup time according to flue gas condition.
Preferably, the denitrating tower is a kind of two storehouse body structure, cup and rear chamber is divided into from right to left, centre is provided with sieve
Plate, its smoke inlet is located at cup side, and exhanst gas outlet is located at rear chamber side.Denitrating tower is fixed bed reactors, fills high work
Property high intensity carbon base catalyst, being divided into front and rear room forms 2 storehouses, can both realize that flue gas laminar flow passed through catalyst layer, operation
It is stable, it can also realize sampling and the local replacing of preceding storehouse catalyst.High-activity high-strength carbon base catalyst is filled in by the present invention
Fixed bed reactors, do not result in catalyst abrasion, and catalyst loss is small.
Preferably, the smoke inlet of the desulfurizing tower is shutter, and exhanst gas outlet is microwell plate structure；The denitration
The smoke inlet of tower is shutter, and exhanst gas outlet is microwell plate structure.Flue gas is used in desulfurizing tower and denitrating tower entrance
A kind of shutter, realizes that drag losses is smaller when flue gas enters device, and flue gas even distribution is realized on section, work is also can guarantee that
Property Jiao/carbon base catalyst be not scattering into outside device.It is hardened using a kind of micropore in desulfurizing tower and denitrating tower outlet section position
Structure, drag losses is smaller when realizing flue gas separating device, also can guarantee that activated coke/carbon-based catalysed particulate is not brought into after purification
Flue gas in.
Preferably, in addition to activated coke heating system, the activated coke heating system is located at regenerator top.
Preferably, the activated coke heating system includes thermal source and thermal source blower fan, the intake stack and thermal source blower fan of thermal source
Wind pipe be communicated in regenerator top.The intake stack of thermal source blower fan is also communicated in regenerator top and can made full use of
The waste heat on regenerator top, reduces the energy resource consumption of activated coke heating system.
Preferably, the SO in addition in the middle part of regenerator2Blower fan.
Preferably, in addition to the cooling system located at regenerator bottom.
Preferably, the regenerator outlet at bottom is provided with sifter, and screened device is connected with the second induction system again.
A kind of method that use said system carries out dry desulfurization denitration to coal fired power plant flue gas, comprises the following steps：Will
Enter desulfurizing tower, activated coke entrance of the activated coke from desulfurizing tower from the smoke inlet of desulfurizing tower after coal fired power plant flue gas blending ammonia
Direction to activated coke Way out move, flue gas on desulfurizing tower bottom, top through activated coke cross-flow adsorption cleaning, in desulfurizing tower
Portion is purified through activated coke counter current absorption, and then the exhanst gas outlet discharge through desulfurizing tower, is blended after ammonia, from the cigarette of denitrating tower again
Gas entrance enters denitrating tower, is discharged after being catalyzed through carbon base catalyst from the exhanst gas outlet of denitrating tower.
Denitrating flue gas process has to spray into NH3, but SO2Can elder generation and NH3The sulphur ammonium of reaction generation has plugging hole to catalyst
SO in gap and the influence of unfavorable regeneration, flue gas2There is inhibitory action to NO removing, and NO is to SO2The without hindrance effect of removing, because
This flue gas desulfurization and denitration, which should be separated, to be carried out, and denitration after first desulfurization.
SO is adsorbed in activated coke2During, chemisorbed generation sulfuric acid absorption is in activated coke hole, and activated coke needs logical
Cross regenerative system to be regenerated, isolate high-concentration sulfur dioxide gas into byproduct recovery process device, recover after regeneration
The activated coke of activity returns to desulfurizing tower and is continuing with.
Beneficial effects of the present invention：
1st, the system for desulfuration and denitration that the present invention is provided can realize the desulphurization denitration of flue gas, and desulfurization and denitration are separately carried out,
And denitration after first desulfurization, it is ensured that collaboration high-efficiency desulfurization and denitration；
2nd, in present system, desulfurizing tower adds counter-flow moving bed, smoke movement in desulfurization reactor using activated coke cross-flow
Direction is cross-flow in entrance and exit section with the activated coke direction of motion, is adverse current in middle main adsorption section；In the flue gas of tower bottom
Dust is removed and preliminary multiple pollutant purification absorption, the multiple pollutant in flue gas is carried out in adsorption section in the middle part of tower efficient
Absorption, the flue gas on tower top carries out final essence in outlet section and fresh activity Jiao and removed, compared with conventional simple cross-flow adsorption tower,
Activated coke utilization rate and physical and chemical adsorption ability are greatly improved；
3rd, in present system, denitrating tower uses high activity carbon base catalyst fixed bed, it is possible to achieve flue gas horizontal sliding is circulated
Catalyst layer is crossed, compared with regular activated burnt denitration moving bed, denitration reaction speed, and reaction tower structure is not only greatly improved
Simply, run easy to operate；
4th, the moving bed that system and method for the present invention are used reinforces fixed bed pattern and is adapted to coal fired power plant fume treatment spy
Point, desulfuration efficiency reaches more than 99.0%, and adsorbs SO simultaneously3, flue dust, a small amount of material such as heavy metal, denitration efficiency reaches
More than 85.0%, while realizing high efficiency desulphurization denitration, meet the environmental requirement of power plant's minimum discharge；Simultaneity factor is than traditional
Moving bed desulphurization denitration pattern solid amount of movement is small, catalyst loss is small, simple in construction, and investment and operating cost have subtracted
It is few.
Brief description of the drawings
Fig. 1 is present system structured flowchart；
Wherein, 1 is desulfurizing tower, and 2 be denitrating tower, and 3 be regenerator, and 4 be the first induction system, and 5 be the second induction system, 6
For flue gas blower fan, 7 be the first ammonia hybrid system, and 8 be the second ammonia hybrid system, 9-11 be followed successively by the cup of desulfurizing tower, middle room and
Rear chamber, 12 and 13 be respectively the cup and rear chamber of denitrating tower, and 14 be activated coke heating system, and 15 be thermal source, and 16 be thermal source blower fan,
17 be SO2Blower fan, 18 be cooling blower, and 19 be sifter.
Embodiment
Technical scheme is specifically introduced below in conjunction with the accompanying drawings.
A kind of system for coal fired power plant flue gas dry desulfurizing denitration as shown in Figure 1, including desulfurization adsorption system, take off
Nitre also original system, active coke regeneration system, activated coke induction system, flue gas system and ammonia hybrid system.
Desulfurization adsorption system is the desulfurizing tower 1 filled with activated coke, and top is activated coke entrance, and bottom goes out for activated coke
Mouthful, bottom is provided with smoke inlet, and top is provided with exhanst gas outlet.Desulfurizing tower 1 is a kind of three storehouse body structure, before being from left to right divided into
Room 9, middle room 10, rear chamber 11, enter between cup 9, middle room 10, rear chamber 11 provided with sieve plate and the activated coke that is respectively communicated with desulfurizing tower
Mouth and activated coke outlet, its smoke inlet, exhanst gas outlet are respectively located at cup 9, the side of rear chamber 11.Smoke inlet is shutter
Structure, exhanst gas outlet is microwell plate structure.Desulfurizing tower from left to right direction, is divided into cup, middle room, rear chamber three activated cokes of formation
There is sieve plate between storehouse, each room, flue gas can pass through, each room uses single batcher discharge, batcher passes through VFC speed
Degree is adjustable, and each room can set the holdup time of activated coke respectively and can set the optimal holdup time according to flue gas condition.
Denitration also original system is the denitrating tower 2 filled with carbon base catalyst, and right side is smoke inlet, and left side goes out for flue gas
Mouthful.Denitrating tower 2 is a kind of two storehouse body structure, and cup 12 and rear chamber 13 are divided into from right to left, and centre is provided with sieve plate, and its flue gas enters
Mouth is located at the side of cup 12, and exhanst gas outlet is located at the side of rear chamber 13.Smoke inlet is shutter, and exhanst gas outlet is microwell plate
Structure.Denitrating tower is fixed bed reactors, fills high-activity high-strength carbon base catalyst, is divided into front and rear room and forms 2 storehouses, both may be used
It is stable to realize flue gas laminar flow by catalyst layer, it can also realize sampling and the local replacing of preceding storehouse catalyst.This hair
It is bright that high-activity high-strength carbon base catalyst is filled in fixed bed reactors, catalyst abrasion is not resulted in, catalyst loss is small.
Active coke regeneration system is activated coke regenerator 3.The top of regenerator 3 is provided with activated coke heating system 14, activated coke
Heating system includes thermal source 15 and thermal source blower fan 16, and the intake stack of thermal source and the wind pipe of thermal source blower fan are communicated in regeneration
The top of tower 3, can make full use of the waste heat on regenerator top, reduce the energy resource consumption of activated coke heating system.The middle part of regenerator 3
Provided with SO2Blower fan 17, bottom is provided with cooling blower 18.The outlet at bottom of regenerator 3 is provided with sifter 19, and screened device 19 is again with the
Two induction systems 5 are connected.
Activated coke induction system includes being delivered to activated coke after absorption into the He of the first induction system 4 of regenerator from desulfurizing tower
The activated coke that regenerator is lived again is delivered to the second induction system 5 of desulfurizing tower from regenerator, and the first induction system 4 is communicated in de-
The activated coke outlet of sulphur tower 1 and regenerator top entry, the second induction system 5 are communicated in the outlet at bottom of regenerator 3 and desulfurizing tower 1
Activated coke entrance, the first induction system 4, the second induction system 5 respectively include conveyer and conveyance conduit.
Flue gas system includes the flue gas blower fan 6 that flue gas is delivered to desulfurizing tower smoke inlet, and desulfurizing tower and denitrating tower
Between flue, the flue after denitrating tower exhanst gas outlet.
Ammonia hybrid system includes being used to mixing ammonia into the first ammonia hybrid system 7 and the second ammonia hybrid system into flue gas
8, the first ammonia hybrid system 7 is located between flue gas blower fan 6 and the smoke inlet of desulfurizing tower 1, and the second ammonia hybrid system 8 is located at desulfurizing tower
Between 1 exhanst gas outlet and the smoke inlet of denitrating tower 2.
Denitrification process is necessarily required to mix appropriate ammonia into flue gas, while those skilled in the art think sweetening process simultaneously
Ammonia is not needed, but it is a discovery of the invention that a small amount of ammonia is mixed in the forward direction flue gas of desulfurization can be particularly helpful to improve desulfurization
Efficiency.
Flue gas uses a kind of shutter in desulfurizing tower and denitrating tower entrance, realizes that resistance is damaged when flue gas enters device
Mistake is smaller, and flue gas even distribution is realized on section, also can guarantee that activated coke/carbon base catalyst is not scattering into outside device.In desulfurization
Tower and denitrating tower outlet section position, using a kind of microwell plate structure, drag losses is smaller when realizing flue gas separating device, can also protect
Card activated coke/carbon-based catalysed particulate is not brought into the flue gas after purification.
Dry desulfurization denitration can be carried out to coal fired power plant flue gas using said system, comprised the following steps：By coal-fired electricity
Enter desulfurizing tower from the smoke inlet of desulfurizing tower after flue gas of standing blending ammonia, activated coke from the activated coke Way in of desulfurizing tower to
Activated coke Way out move, flue gas on desulfurizing tower bottom, top through activated coke cross-flow adsorption cleaning, through work in the middle part of desulfurizing tower
Property burnt counter current absorption purification, the then exhanst gas outlet discharge through desulfurizing tower is blended after ammonia again, from the smoke inlet of denitrating tower
Into denitrating tower, discharged after being catalyzed through carbon base catalyst from the exhanst gas outlet of denitrating tower.
Denitrating flue gas process has to spray into NH3, but SO2Can elder generation and NH3The sulphur ammonium of reaction generation has plugging hole to catalyst
SO in gap and the influence of unfavorable regeneration, flue gas2There is inhibitory action to NO removing, and NO is to SO2The without hindrance effect of removing, because
This flue gas desulfurization and denitration, which should be separated, to be carried out, and denitration after first desulfurization.
SO is adsorbed in activated coke2During, chemisorbed generation sulfuric acid absorption is in activated coke hole, and activated coke needs logical
Cross regenerative system to be regenerated, isolate high-concentration sulfur dioxide gas into byproduct recovery process device, recover after regeneration
The activated coke of activity returns to desulfurizing tower and is continuing with.
Inventive desulfurization denitrating system can realize the desulphurization denitration of flue gas, and desulfurization and denitration are separately carried out, and first desulfurization
Denitration afterwards, it is ensured that desulfurization is not interfere with each other with denitration；In present system, desulfurizing tower added using activated coke cross-flow it is counter-flow moving bed,
Compared with conventional simple cross-flow adsorption tower, activated coke utilization rate and physical and chemical adsorption ability are greatly improved；Denitrating tower is using high
Absorbent charcoal based catalyst fixed bed, compared with regular activated burnt moving bed, not only greatly improves denitration reaction speed, and reaction
Tower structure is simple, runs easy to operate；The moving bed that system and method for the present invention are used reinforces fixed bed pattern and is adapted to fire coal
Generating plant flue gas processing feature, desulfuration efficiency reaches more than 99.0%, and adsorbs SO simultaneously3, flue dust, a small amount of material such as heavy metal,
Denitration efficiency reaches more than 85.0%, while realizing high efficiency desulphurization denitration, meets the environmental requirement of power plant's minimum discharge；Simultaneously
System is smaller than traditional moving bed desulphurization denitration pattern solid amount of movement, catalyst loss is small, simple in construction, invests and runs into
This has been reduced.
The effect of above-described embodiment is only that the essentiality content of the explanation present invention, but the guarantor of the present invention is not limited with this
Protect scope.It will be understood by those within the art that, technical scheme can be modified or equally replaced
Change, without departing from the essence and protection domain of technical solution of the present invention.
Claims (10)
1. a kind of system for coal fired power plant flue gas dry desulfurizing denitration, it is characterised in that：Including desulfurization adsorption system, denitration
Also original system, active coke regeneration system, activated coke induction system, flue gas system and ammonia hybrid system；
The desulfurization adsorption system is the desulfurizing tower filled with activated coke, and top is activated coke entrance, and bottom exports for activated coke,
Bottom is provided with smoke inlet, and top is provided with exhanst gas outlet；
The denitration also original system is the denitrating tower filled with carbon base catalyst, and right side is smoke inlet, and left side is exhanst gas outlet；
The active coke regeneration system is activated coke regenerator；
The activated coke induction system include by activated coke after absorption from desulfurizing tower be delivered to regenerator the first induction system and
The activated coke that regenerator is lived again is delivered to the second induction system of desulfurizing tower from regenerator, and the first induction system is communicated in desulfurization
The activated coke outlet of tower and regenerator top entry, the second induction system are communicated in the activity of regenerator outlet at bottom and desulfurizing tower
Burnt entrance, the first induction system, the second induction system include conveyer and conveyance conduit respectively；
The flue gas system includes the flue gas blower fan and flue that flue gas is delivered to desulfurizing tower smoke inlet, and desulfurizing tower
The flue after flue, denitrating tower exhanst gas outlet between denitrating tower；
The ammonia hybrid system includes being used to ammonia mixing the first ammonia hybrid system and the second ammonia hybrid system into flue gas,
First ammonia hybrid system is located between flue gas blower fan and desulfurizing tower smoke inlet, and the second ammonia hybrid system goes out located at desulfurization tower flue gas
Between mouth and denitrating tower smoke inlet.
2. system according to claim 1, it is characterised in that：The desulfurizing tower be a kind of three storehouse body structure, from a left side to
The right side is divided into cup, middle room, rear chamber, and provided with sieve plate and activated coke entrance in desulfurizing tower is respectively communicated between cup, middle room, rear chamber
With activated coke outlet, its smoke inlet, exhanst gas outlet are respectively located at cup, rear chamber side.
3. system according to claim 1, it is characterised in that：The denitrating tower be a kind of two storehouse body structure, from the right side to
A left side is divided into cup and rear chamber, and centre is provided with sieve plate, and its smoke inlet is located at cup side, and exhanst gas outlet is located at rear chamber side.
4. the system according to Claims 2 or 3, it is characterised in that：The smoke inlet of the desulfurizing tower is shutter,
Exhanst gas outlet is microwell plate structure；The smoke inlet of the denitrating tower is shutter, and exhanst gas outlet is microwell plate structure.
5. system according to claim 1, it is characterised in that：Also include activated coke heating system, activated coke heating system
System is located at regenerator top.
6. system according to claim 5, it is characterised in that：The activated coke heating system includes thermal source and thermal source wind
Machine, the intake stack of thermal source and the wind pipe of thermal source blower fan are communicated in regenerator top.
7. system according to claim 1, it is characterised in that：Also include the SO in the middle part of regenerator2Blower fan.
8. system according to claim 1, it is characterised in that：Also include the cooling system located at regenerator bottom.
9. system according to claim 1, it is characterised in that：The regenerator outlet at bottom is provided with sifter, screened
Device is connected with the second induction system again.
10. a kind of method that any systems of use claim 1-9 carry out dry desulfurization denitration to coal fired power plant flue gas, its
It is characterised by, comprises the following steps：Desulfurizing tower will be entered from the smoke inlet of desulfurizing tower after coal fired power plant flue gas blending ammonia, it is living
Property Jiao from the activated coke Way in of desulfurizing tower to activated coke Way out move, flue gas is on desulfurizing tower bottom, top through activity
Burnt cross-flow adsorption cleaning, is purified in the middle part of desulfurizing tower through activated coke counter current absorption, then the exhanst gas outlet discharge through desulfurizing tower, then
After secondary blending ammonia, enter denitrating tower from the smoke inlet of denitrating tower, go out after being catalyzed through carbon base catalyst from the flue gas of denitrating tower
Mouth discharge.
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| CN108097043A (en) * | 2018-02-05 | 2018-06-01 | 山东大学 | A kind of system and method for powdered activated coke fluid-bed sweetening afterbody spray ammonia combined denitration |
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| CN108744960B (en) * | 2018-06-14 | 2021-06-18 | 华北电力大学（保定） | Device and method for simultaneously desulfurizing, denitrifying, removing mercury and recycling flue gas |
| CN110856792A (en) * | 2018-08-23 | 2020-03-03 | 中国石化工程建设有限公司 | System and method for purifying flue gas by active coke adsorption |
| CN110772983A (en) * | 2019-11-11 | 2020-02-11 | 中国科学院山西煤炭化学研究所 | Device and method for low-temperature denitration of flue gas |
| CN111589303A (en) * | 2020-06-03 | 2020-08-28 | 中冶华天工程技术有限公司 | Sintering flue gas combined desulfurization and denitrification system |
| CN113667519B (en) * | 2021-08-25 | 2023-06-27 | 中冶赛迪上海工程技术有限公司 | Desulfurization system for blast furnace gas and control method thereof |
| CN113667519A (en) * | 2021-08-25 | 2021-11-19 | 中冶赛迪上海工程技术有限公司 | Desulfurization system for blast furnace gas and control method thereof |
| CN114367193A (en) * | 2022-01-24 | 2022-04-19 | 哈尔滨工业大学 | Efficient low-temperature combined desulfurization and denitrification system and method based on active coke function partition |
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