CN107398173A - A kind of lime stone carries out CO in double tower fluid bed2Circularly trapping device and its technique - Google Patents
A kind of lime stone carries out CO in double tower fluid bed2Circularly trapping device and its technique Download PDFInfo
- Publication number
- CN107398173A CN107398173A CN201710746465.5A CN201710746465A CN107398173A CN 107398173 A CN107398173 A CN 107398173A CN 201710746465 A CN201710746465 A CN 201710746465A CN 107398173 A CN107398173 A CN 107398173A
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- Prior art keywords
- regenerator
- absorber
- absorbent
- lime stone
- flyash
- Prior art date
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- Granted
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- 235000019738 Limestone Nutrition 0.000 title claims abstract description 54
- 239000006028 limestone Substances 0.000 title claims abstract description 54
- 230000005532 trapping Effects 0.000 title claims abstract description 28
- 239000012530 fluid Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000002250 absorbent Substances 0.000 claims abstract description 57
- 230000002745 absorbent Effects 0.000 claims abstract description 51
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 34
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 26
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 239000006096 absorbing agent Substances 0.000 claims description 85
- 239000007789 gas Substances 0.000 claims description 61
- 239000010881 fly ash Substances 0.000 claims description 38
- 238000000926 separation method Methods 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 18
- 239000000446 fuel Substances 0.000 claims description 13
- 238000001354 calcination Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 230000003134 recirculating effect Effects 0.000 claims description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 238000006555 catalytic reaction Methods 0.000 claims description 6
- 239000003153 chemical reaction reagent Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000000320 mechanical mixture Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 238000004513 sizing Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000004568 cement Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000010459 dolomite Substances 0.000 abstract 1
- 229910000514 dolomite Inorganic materials 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 229960004424 carbon dioxide Drugs 0.000 description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 235000011089 carbon dioxide Nutrition 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—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
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon 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
- B01D53/81—Solid phase 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- 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
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- 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
- F23J2215/50—Carbon dioxide
-
- 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
-
- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/32—Direct CO2 mitigation
Abstract
The present invention relates to energy-conserving and emission-cutting technology field, especially a kind of lime stone carries out CO2 circularly trappings device and its technique in double tower fluid bed, preparation including absorbent, absorbent mixes, the trapping of carbon dioxide, the recycling step recycled with carbon dioxide of absorbent, using cheap lime stone and dolomite as cyclic absorption agent, it is greatly improved the capture rate of carbon dioxide, it can reach more than 90%, and the waste residue discharged can be used for manufacture of cement industry, twice laid has reached the purpose of energy-saving and emission-reduction, recycled in a regenerator using the carbon dioxide of high concentration, on the one hand the high temperature of circulating air is utilized, on the other hand the gas concentration lwevel of outlet can be improved, reduce CO2Energy consumption needed for trapping.
Description
Technical field
The present invention relates to energy-conserving and emission-cutting technology field, more particularly to a kind of lime stone to carry out CO in double tower fluid bed2Follow
Ring capturing device and its technique.
Background technology
Economic fast development, cause the exhaustion of the energy and the deterioration of environment, and most severe environmental problem is exactly complete
Ball warms, wherein the CO of excessive emissions2It is the arch-criminal for causing this present situation.CO2Emission reduction is an extremely complex system work
Journey.Thermal power plant is discharge CO2Maximum industry.The CO discharged after the combustion of fossil fuels of thermal power plant2It is same to account for whole world burning
The 30% of kind fuel discharge amount, constitute about global human activity discharge CO224%.Therefore, the most combustion of carbon dioxide is discharged
Coal-fired plant turns into the industry of most potential implementation collecting carbonic anhydride.
The content of the invention
The invention aims to solve to have the excessive shortcoming of thermal power plant CO2 emissions in the prior art,
And a kind of lime stone proposed carries out CO in double tower fluid bed2Circularly trapping device and its technique.
To achieve these goals, present invention employs following technical scheme：
Design a kind of lime stone and CO is carried out in double tower fluid bed2Circularly trapping device, including regenerator and absorber, institute
The bottom for stating regenerator is provided with primary air access tube, and the side wall of the regenerator is provided with auxiliary air access tube and three times
Air access tube, the bottom of the regenerator offer discharge port, and the side wall of the regenerator offers fuel inlet, the combustion
Expect the openend connection screw feeder of entrance, the bottom of the regenerator is connected by connecting pipe with bottom cycle device, institute
State bottom cycle device to be connected with absorber by overflow pipe, the bottom of the absorber is provided with gas distributor, the gas
Disperser is connected with outside power plant's flue gas leading, and absorber gas vent is offered at the top of the absorber, and absorber gas goes out
Mouth is connected with cyclone separation system one, and regenerator outlet is connected with cyclone separation system two, and the top of the absorber also opens up
There is feeding mouth, the first cyclone separator bottom of cyclone separation system two is connected with a material drop pipe, and material drop pipe is inserted
Enter inside absorber.
A kind of lime stone carries out CO in double tower fluid bed2The technique of circularly trapping, comprises the following steps：
S1, absorbent preparation, take lime stone to be ground in launching into grinder, filter out bulky grain lime stone and continue to grind
Mill, the lime stone after grinding is subjected to sizing screening, selectes the particle of particle size range required for meeting fluidized bed flow, it is stand-by,
Equally flyash is ground, calcined in launching into crucible, and maintains the temperature at 910-950 DEG C, by the flyash after calcining
It is cooled to room temperature and launches into reactive tank, then adds soda bath and be sufficiently stirred, the burning in last emptying reactive tank
Aqueous slkali, take out flyash and dried for standby in reactive tank；
S2, absorbent mixing, take the flyash 100-400 parts dried in S1, take granular lime stone 300-1200 parts,
Then it is stand-by the flyash of 100-400 parts and the graininess lime stone of 300-1200 parts to be subjected to the obtained absorbent of mechanical mixture；
S3, carbon dioxide trapping, the absorbent prepared in S2 is launched into absorber through feeding mouth, through following
Ring is entered in regenerator, keeps absorbent of the temperature of regenerator after 910-950 DEG C, calcining to be admitted to recirculating fluidized bed
In absorber, power plant exhaust enters absorber through gas distributor from the bottom of absorber as flowing gas, in power plant exhaust
CO2CaCO is generated with the CaO in absorbent3, flyash plays a part of catalysis；
S4, absorbent circulation, reacted absorbent is sent back in recirculating fluidized bed regenerator through bottom cycle device in S3,
Calcined, while obtained composite absorber in S2 is supplemented by charging aperture, pass through the cyclone separation system of regenerator outlet
The too small absorbent of two exclusion particle diameters focuses on；
S5, carbon dioxide recovery, the high concentration dioxy after regenerator gases outlet is handled through three-level whirlwind
Change carbon gas is circulated using 15-30% as fluidizing reagent is passed through regenerator bottoms, and the high concentration carbon dioxide gas of remainder enters
Row compression storage.
Preferably, tip temperature sensor, middle portion temperature sensor are disposed with the regenerator, bottom temp passes
Sensor, regenerator total pressure sensor and regenerator epimere, interruption, hypomere piezometry.
Preferably, temperature sensor is provided with the absorber, bottom cycle device is provided with temperature sensor, is absorbing
Pressure sensor is provided between device and bottom cycle device.
A kind of lime stone proposed by the present invention carries out CO in double tower fluid bed2Circularly trapping device and its technique are beneficial
Effect is：Using cheap lime stone and flyash as cyclic absorption agent, processing cost is reduced, the flyash after processing
Catalyst can be used as to promote lime stone to be reacted with carbon dioxide, be greatly improved the capture rate of carbon dioxide, can reach
More than 90%, and the waste residue discharged can be used for manufacture of cement industry, and twice laid has reached the purpose of energy-saving and emission-reduction, regenerated
Recycled in device using the carbon dioxide of high concentration, on the one hand using the high temperature of circulating air, on the other hand can improve outlet
Gas concentration lwevel, further reduce CO2Energy consumption needed for processing.
Brief description of the drawings
Fig. 1 is that a kind of lime stone proposed by the present invention carries out CO in double tower fluid bed2The schematic diagram of circularly trapping device.
In figure：1 tip temperature sensor, 2 regenerators, 3 middle portion temperature sensors, 4 total pressure sensors, 5 fuel inlets,
6 bottom temp sensors, 7 bottom cycle device temperature sensors, 8 absorbers, 9 absorber temperatures sensors, 10 absorber gases
Outlet, 11 cyclone separation systems two, 12 cyclone separation systems one, 13 screw feeders, 14 gas distributors, 15 bottom cycles
Device, 16 charging apertures, 17 pressure sensors, 18 discharge ports.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
Embodiment one
Reference picture 1, a kind of lime stone carry out CO in double tower fluid bed2Circularly trapping device, including regenerator 2 and absorption
Device 8, the bottom of regenerator 2 are provided with primary air access tube, and the side wall of regenerator 2 is provided with auxiliary air access tube and three times
Air access tube, the bottom of regenerator 2 offer discharge port 18, and the side wall of regenerator 2 offers fuel inlet 5, fuel inlet 5
Openend connection screw feeder 13, the bottom of regenerator 2 is connected by connecting pipe D with bottom cycle device 15, and bottom is followed
Ring device 15 is connected by overflow pipe C with absorber 8, and the bottom of absorber 8 is provided with gas distributor 14, gas distributor 14 with
Outside power plant's flue gas leading connection, the top of absorber 8 offers absorber gas vent 10, absorber gas vent 10 and whirlwind
Unified 12 connection of segregative line, regenerator 2 export A and are connected with cyclone separation system 2 11, and the top of absorber 8 is further opened with pan feeding
Mouth 16, the first cyclone separator bottom of cyclone separation system 2 11 is connected with a material drop pipe B, and material drop pipe B is inserted
Enter inside absorber 8.
It is disposed with tip temperature sensor 1, middle portion temperature sensor 3 on regenerator 2, bottom temp sensor 6, then
Device total pressure sensor 4 and regenerator epimere, interruption, hypomere piezometry are given birth to, temperature sensor 9, bottom are provided with absorber 8
Portion's circulator 15 is provided with temperature sensor 7, and pressure sensor 17 is provided between absorber 8 and bottom cycle device 15.
A kind of lime stone carries out CO in double tower fluid bed2The technique of circularly trapping, comprises the following steps：
S1, absorbent preparation, take lime stone to be ground in launching into grinder, filter out bulky grain lime stone and continue to grind
Mill, the lime stone after grinding is subjected to sizing screening, selectes the particle of particle size range required for meeting fluidized bed flow, it is stand-by,
Equally flyash is ground, calcined in launching into crucible, and maintains the temperature at 910 DEG C, the flyash after calcining is cooled down
To room temperature and launch into reactive tank, then add soda bath and be sufficiently stirred, the caustic soda in last emptying reactive tank is molten
Liquid, take out flyash and dried for standby in reactive tank；
S2, absorbent mixing, take 100 parts of the flyash dried in S1, granular 300 parts of lime stone are taken, then by 100
Part flyash with 300 parts of graininess lime stone to carry out the obtained absorbent of mechanical mixture stand-by；
S3, carbon dioxide trapping, the absorbent prepared in S2 is launched into absorber 8 through feeding mouth 16,
Through being recycled into regenerator 2, keeping the temperature of regenerator 2, the absorbent after calcining is admitted to recirculating fluidized bed at 910 DEG C
Absorber 8 in, power plant exhaust enters absorber 8 through gas distributor from the bottom of absorber 8 as flowing gas, and power plant gives up
CO in gas2CaCO is generated with the CaO in absorbent3, flyash plays a part of catalysis；
S4, absorbent circulation, reacted absorbent sends recirculating fluidized bed regenerator 2 back to through bottom cycle device in S3
In, calcined, while obtained composite absorber in S2 is supplemented by charging aperture 16, pass through the cyclonic separation of regenerator outlet
System 2 11 excludes the too small absorbent of particle diameter and focused on；
S5, carbon dioxide recovery, the high concentration two after the gas vent A of regenerator 2 is handled through three-level whirlwind
Carbon oxide gas are passed through the bottom of regenerator 2 using 15% as fluidizing reagent circulation, and the high concentration carbon dioxide gas of remainder enters
Row compression storage.
Embodiment two
Reference picture 1, a kind of lime stone carry out CO in double tower fluid bed2Circularly trapping device, including regenerator 2 and absorption
Device 8, the bottom of regenerator 2 are provided with primary air access tube, and the side wall of regenerator 2 is provided with auxiliary air access tube and three times
Air access tube, the bottom of regenerator 2 offer discharge port 18, and the side wall of regenerator 2 offers fuel inlet 5, fuel inlet 5
Openend connection screw feeder 13, the bottom of regenerator 2 is connected by connecting pipe D with bottom cycle device 15, and bottom is followed
Ring device 15 is connected by overflow pipe C with absorber 8, and the bottom of absorber 8 is provided with gas distributor 14, gas distributor 14 with
Outside power plant's flue gas leading connection, the top of absorber 8 offers absorber gas vent 10, absorber gas vent 10 and whirlwind
Unified 12 connection of segregative line, regenerator 2 export A and are connected with cyclone separation system 2 11, and the top of absorber 8 is further opened with pan feeding
Mouth 16, the first cyclone separator bottom of cyclone separation system 2 11 is connected with a material drop pipe B, and material drop pipe B is inserted
Enter inside absorber 8.
It is disposed with tip temperature sensor 1, middle portion temperature sensor 3 on regenerator 2, bottom temp sensor 6, then
Device total pressure sensor 4 and regenerator epimere, interruption, hypomere piezometry are given birth to, temperature sensor 9, bottom are provided with absorber 8
Portion's circulator 15 is provided with temperature sensor 7, and pressure sensor 17 is provided between absorber and bottom cycle device.
2nd, a kind of lime stone carries out CO in double tower fluid bed2The technique of circularly trapping, comprises the following steps：
S1, absorbent preparation, take lime stone to be ground in launching into grinder, filter out bulky grain lime stone and continue to grind
Mill, the lime stone after grinding is subjected to sizing screening, selectes the particle of particle size range required for meeting fluidized bed flow, it is stand-by,
Equally flyash is ground, calcined in launching into crucible, and maintains the temperature at 920 DEG C, the flyash after calcining is cooled down
To room temperature and launch into reactive tank, then add soda bath and be sufficiently stirred, the caustic soda in last emptying reactive tank is molten
Liquid, take out flyash and dried for standby in reactive tank；
S2, absorbent mixing, take 200 parts of the flyash dried in S1, granular 600 parts of lime stone are taken, then by 200
Part flyash with 600 parts of graininess lime stone to carry out the obtained absorbent of mechanical mixture stand-by；
S3, carbon dioxide trapping, the absorbent prepared in S2 is launched into absorber 8 through feeding mouth 16,
Through being recycled into regenerator 2, keeping the temperature of regenerator 2, the absorbent after calcining is admitted to recirculating fluidized bed at 920 DEG C
Absorber 8 in, power plant exhaust enters absorber 8 through gas distributor from the bottom of absorber 8 as flowing gas, and power plant gives up
CO in gas2CaCO is generated with the CaO in absorbent3, flyash plays a part of catalysis；
S4, absorbent circulation, reacted absorbent sends recirculating fluidized bed regenerator 2 back to through bottom cycle device in S3
In, calcined, while obtained composite absorber in S2 is supplemented by charging aperture 16, pass through the cyclonic separation of regenerator outlet
System 2 11 excludes the too small absorbent of particle diameter and focused on；
S5, carbon dioxide recovery, the high concentration two after the gas vent A of regenerator 2 is handled through three-level whirlwind
Carbon oxide gas are passed through the bottom of regenerator 2 using 20% as fluidizing reagent circulation, and the high concentration carbon dioxide gas of remainder enters
Row compression storage.
Embodiment three
Reference picture 1, a kind of lime stone carry out CO in double tower fluid bed2Circularly trapping device, including regenerator 2 and absorption
Device 8, the bottom of regenerator 2 are provided with primary air access tube, and the side wall of regenerator 2 is provided with auxiliary air access tube and three times
Air access tube, the bottom of regenerator 2 offer discharge port 18, and the side wall of regenerator 2 offers fuel inlet 5, fuel inlet 5
Openend connection screw feeder 13, the bottom of regenerator 2 is connected by connecting pipe D with bottom cycle device 15, and bottom is followed
Ring device 15 is connected by overflow pipe C with absorber 8, and the bottom of absorber 8 is provided with gas distributor 14, gas distributor 14 with
Outside power plant's flue gas leading connection, the top of absorber 8 offers absorber gas vent 10, absorber gas vent 10 and whirlwind
Unified 12 connection of segregative line, regenerator 2 export A and are connected with cyclone separation system 2 11, and the top of absorber 8 is further opened with pan feeding
Mouth 16, the first cyclone separator bottom of cyclone separation system 2 11 is connected with a material drop pipe B, and material drop pipe B is inserted
Enter inside absorber 8.
It is disposed with tip temperature sensor 1, middle portion temperature sensor 3 on regenerator 2, bottom temp sensor 6, then
Device total pressure sensor 4 and regenerator epimere, interruption, hypomere piezometry are given birth to, temperature sensor 9, bottom are provided with absorber 8
Portion's circulator 15 is provided with temperature sensor 7, and pressure sensor 17 is provided between absorber and bottom cycle device.
A kind of lime stone carries out CO in double tower fluid bed2The technique of circularly trapping, comprises the following steps：
S1, absorbent preparation, take lime stone to be ground in launching into grinder, filter out bulky grain lime stone and continue to grind
Mill, the lime stone after grinding is subjected to sizing screening, selectes the particle of particle size range required for meeting fluidized bed flow, it is stand-by,
Equally flyash is ground, calcined in launching into crucible, and maintains the temperature at 930 DEG C, the flyash after calcining is cooled down
To room temperature and launch into reactive tank, then add soda bath and be sufficiently stirred, the caustic soda in last emptying reactive tank is molten
Liquid, take out flyash and dried for standby in reactive tank；
S2, absorbent mixing, take 300 parts of the flyash dried in S1, granular 900 parts of lime stone are taken, then by 300
Part flyash with 900 parts of graininess lime stone to carry out the obtained absorbent of mechanical mixture stand-by；
S3, carbon dioxide trapping, the absorbent prepared in S2 is launched into absorber 8 through feeding mouth 16,
Through being recycled into regenerator 2, keeping the temperature of regenerator 2, the absorbent after calcining is admitted to recirculating fluidized bed at 930 DEG C
Absorber 8 in, power plant exhaust enters absorber 8 through gas distributor from the bottom of absorber 8 as flowing gas, and power plant gives up
CO in gas2CaCO is generated with the CaO in absorbent3, flyash plays a part of catalysis；
S4, absorbent circulation, reacted absorbent sends recirculating fluidized bed regenerator 2 back to through bottom cycle device in S3
In, calcined, while obtained composite absorber in S2 is supplemented by charging aperture 16, pass through the cyclonic separation of regenerator outlet
System 2 11 excludes the too small absorbent of particle diameter and focused on；
S5, carbon dioxide recovery, the high concentration two after the gas vent A of regenerator 2 is handled through three-level whirlwind
Carbon oxide gas are passed through the bottom of regenerator 2 using 25% as fluidizing reagent circulation, and the high concentration carbon dioxide gas of remainder enters
Row compression storage.
Example IV
Reference picture 1, a kind of lime stone carry out CO in double tower fluid bed2Circularly trapping device, including regenerator 2 and absorption
Device 8, the bottom of regenerator 2 are provided with primary air access tube, and the side wall of regenerator 2 is provided with auxiliary air access tube and three times
Air access tube, the bottom of regenerator 2 offer discharge port 18, and the side wall of regenerator 2 offers fuel inlet 5, fuel inlet 5
Openend connection screw feeder 13, the bottom of regenerator 2 is connected by connecting pipe D with bottom cycle device 15, and bottom is followed
Ring device 15 is connected by overflow pipe C with absorber 8, and the bottom of absorber 8 is provided with gas distributor 14, gas distributor 14 with
Outside power plant's flue gas leading connection, the top of absorber 8 offers absorber gas vent 10, absorber gas vent 10 and whirlwind
Unified 12 connection of segregative line, regenerator 2 export A and are connected with cyclone separation system 2 11, and the top of absorber 8 is further opened with pan feeding
Mouth 16, the first cyclone separator bottom of cyclone separation system 2 11 is connected with a material drop pipe B, and material drop pipe B is inserted
Enter inside absorber 8.
It is disposed with tip temperature sensor 1, middle portion temperature sensor 3 on regenerator 2, bottom temp sensor 6, then
Device total pressure sensor 4 and regenerator epimere, interruption, hypomere piezometry are given birth to, temperature sensor 9, bottom are provided with absorber 8
Portion's circulator 15 is provided with temperature sensor 7, and pressure sensor 17 is provided between absorber and bottom cycle device.
A kind of lime stone carries out CO in double tower fluid bed2The technique of circularly trapping, comprises the following steps：
S1, absorbent preparation, take lime stone to be ground in launching into grinder, filter out bulky grain lime stone and continue to grind
Mill, the lime stone after grinding is subjected to sizing screening, selectes the particle of particle size range required for meeting fluidized bed flow, it is stand-by,
Equally flyash is ground, calcined in launching into crucible, and maintains the temperature at 940 DEG C, the flyash after calcining is cooled down
To room temperature and launch into reactive tank, then add soda bath and be sufficiently stirred, the caustic soda in last emptying reactive tank is molten
Liquid, take out flyash and dried for standby in reactive tank；
S2, absorbent mixing, take 400 parts of the flyash dried in S1, take granular 1200 parts of lime stone, then will
400 parts of flyash and 1200 parts of graininess lime stone carry out mechanical mixture, and that absorbent is made is stand-by；
S3, carbon dioxide trapping, the absorbent prepared in S2 is launched into absorber 8 through feeding mouth 16,
Through being recycled into regenerator 2, keeping the temperature of regenerator 2, the absorbent after calcining is admitted to recirculating fluidized bed at 940 DEG C
Absorber 8 in, power plant exhaust enters absorber 8 through gas distributor from the bottom of absorber 8 as flowing gas, and power plant gives up
CO in gas2CaCO is generated with the CaO in absorbent3, flyash plays a part of catalysis；
S4, absorbent circulation, reacted absorbent sends recirculating fluidized bed regenerator 2 back to through bottom cycle device in S3
In, calcined, while obtained composite absorber in S2 is supplemented by charging aperture 16, pass through the cyclonic separation of regenerator outlet
System 2 11 excludes the too small absorbent of particle diameter and focused on；
S5, carbon dioxide recovery, the high concentration two after the gas vent A of regenerator 2 is handled through three-level whirlwind
Carbon oxide gas are passed through the bottom of regenerator 2 using 30% as fluidizing reagent circulation, and the high concentration carbon dioxide gas of remainder enters
Row compression storage.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (4)
1. a kind of lime stone carries out CO in double tower fluid bed2Circularly trapping device, including regenerator (2) and absorber (8), institute
The bottom for stating regenerator (2) is provided with primary air access tube, and the side wall of the regenerator (2) is provided with auxiliary air access tube
With tertiary air access tube, the bottom of the regenerator (2) offers discharge port (18), it is characterised in that the regenerator (2)
Side wall offer fuel inlet (5), the openend connection screw feeder (13) of the fuel inlet (5), the regenerator
(2) bottom is connected by connecting pipe (D) with bottom cycle device (15), and the bottom cycle device (15) passes through overflow pipe (C)
Be connected with absorber (8), the bottom of the absorber (8) is provided with gas distributor (14), the gas distributor (14) with
Outside power plant's flue gas leading is connected, and absorber gas vent (10), absorber gas vent are offered at the top of the absorber (8)
(10) it is connected with cyclone separation system one (12), regenerator (2) outlet (A) is connected with cyclone separation system two (11), the suction
Receive and be further opened with feeding mouth (16) at the top of device (8), the first cyclone separator bottom of cyclone separation system two (11) is connected with
One material drop pipe (B), material drop pipe (B) insertion absorber (8) are internal.
2. a kind of lime stone according to claim 1 carries out CO in double tower fluid bed2The technique of circularly trapping, its feature
It is, comprises the following steps：
S1, absorbent preparation, take lime stone to be ground in launching into grinder, filter out bulky grain lime stone and continue to grind, will
Lime stone after grinding carries out sizing screening, selectes the particle of particle size range required for meeting fluidized bed flow, stand-by, equally will
Flyash is ground, and is calcined in launching into crucible, and maintains the temperature at 910-950 DEG C, and the flyash after calcining is cooled to
Room temperature is simultaneously launched into reactive tank, is then added soda bath and is sufficiently stirred, the soda bath in last emptying reactive tank,
Take out the flyash and dried for standby in reactive tank；
S2, absorbent mixing, take the flyash 100-400 parts dried in S1, take granular lime stone 300-1200 parts, then
It is stand-by that the flyash of 100-400 parts and the graininess lime stone of 300-1200 parts are subjected to the obtained absorbent of mechanical mixture；
S3, carbon dioxide trapping, the absorbent prepared in S2 is launched into absorber (8) through feeding mouth (16),
Through being recycled into regenerator (2), keep absorbent of the temperature of regenerator (2) after 910-950 DEG C, calcining to be admitted to and follow
In the absorber (8) of ring fluid bed, power plant exhaust enters from the bottom of absorber (8) through gas distributor as flowing gas to be inhaled
Device (8) is received, the CO in power plant exhaust2CaCO is generated with the CaO in absorbent3, flyash plays a part of catalysis；
S4, absorbent circulation, reacted absorbent is sent back in recirculating fluidized bed regenerator (2) through bottom cycle device in S3,
Calcined, while obtained composite absorber in S2 is supplemented by charging aperture (16), pass through the cyclonic separation of regenerator outlet
System two (11) excludes the too small absorbent of particle diameter and focused on；
S5, carbon dioxide recovery, the high concentration two after regenerator (2) gas vent (A) is handled through three-level whirlwind
Carbon oxide gas are circulated using 15-30% as fluidizing reagent is passed through regenerator (2) bottom, the high concentration carbon dioxide gas of remainder
Body is compressed storage.
3. a kind of lime stone according to claim 1 carries out CO in double tower fluid bed2Circularly trapping device, its feature exist
In being disposed with tip temperature sensor (1), middle portion temperature sensor (3) on the regenerator (2), bottom temp sensing
Device (6), regenerator total pressure sensor (4) and regenerator epimere, interruption, hypomere piezometry.
4. a kind of lime stone according to claim 1 carries out CO in double tower fluid bed2Circularly trapping device, its feature exist
In being provided with temperature sensor (9) on the absorber (8), bottom cycle device (15) is provided with temperature sensor (7), inhaled
Receive and be provided with pressure sensor (17) between device (8) and bottom cycle device (15).
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