WO2021131459A1 - 排気ガス処理設備、及びガスタービンプラント - Google Patents
排気ガス処理設備、及びガスタービンプラント Download PDFInfo
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- WO2021131459A1 WO2021131459A1 PCT/JP2020/043630 JP2020043630W WO2021131459A1 WO 2021131459 A1 WO2021131459 A1 WO 2021131459A1 JP 2020043630 W JP2020043630 W JP 2020043630W WO 2021131459 A1 WO2021131459 A1 WO 2021131459A1
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- exhaust gas
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- carbon dioxide
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 182
- 238000010438 heat treatment Methods 0.000 claims abstract description 106
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 91
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 91
- 238000010521 absorption reaction Methods 0.000 claims description 116
- 239000007788 liquid Substances 0.000 claims description 89
- 238000011084 recovery Methods 0.000 claims description 48
- 238000001816 cooling Methods 0.000 claims description 45
- 230000008929 regeneration Effects 0.000 claims description 40
- 238000011069 regeneration method Methods 0.000 claims description 40
- 238000000605 extraction Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 179
- 239000000779 smoke Substances 0.000 description 14
- 239000002250 absorbent Substances 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 2
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 2
- 229940043276 diisopropanolamine Drugs 0.000 description 2
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/343—Heat recovery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—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
- B01D53/77—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
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/34—Gas-turbine plants characterised by the use of combustion products as the working fluid with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
-
- 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
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/61—Removal of CO2
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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
- 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
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- 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
Definitions
- the present disclosure relates to exhaust gas treatment equipment and gas turbine plants.
- the present application claims priority based on Japanese Patent Application No. 2019-239,000 filed in Japan on December 27, 2019, the contents of which are incorporated herein by reference.
- the exhaust gas may contain water.
- white smoke is generated when the exhaust gas is discharged.
- the exhaust gas directly drops near the outlet and is accompanied by a small amount of nitrogen oxides in the exhaust gas remaining. Therefore, in the technique according to Patent Document 1 below, a method is adopted in which the used absorption liquid is heated and regenerated by the heat of the exhaust gas, and the exhaust gas is heated by using the heat of the regenerated absorption liquid. As a result, the water content in the exhaust gas evaporates, and it is said that the generation of white smoke can be suppressed.
- Patent Document 1 since the heat of the regenerated absorption liquid is limited, there is a possibility that the exhaust gas cannot be sufficiently heated only by using the absorption liquid. Therefore, the device described in Patent Document 1 may still generate white smoke.
- the present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide an exhaust gas treatment facility capable of suppressing the generation of white smoke and a gas turbine plant.
- the exhaust gas treatment facility is provided on an exhaust line through which the exhaust gas discharged from the boiler flows and on the exhaust line, and recovers carbon dioxide contained in the exhaust gas.
- the carbon dioxide recovery device is provided with an exhaust gas heating device provided on the downstream side of the carbon dioxide recovery device in the exhaust line to heat the exhaust gas, and the first medium is distributed in the carbon dioxide recovery device.
- the exhaust gas heating device has a first medium line and a second medium line through which a second medium having a temperature higher than that of the first medium flows, and the exhaust gas heating device exchanges heat with the first medium to exchange the exhaust gas. It has a first heating unit that heats the exhaust gas, and a second heating unit that further heats the exhaust gas that has passed through the first heating unit by heat exchange with the second medium.
- the generation of white smoke can be suppressed.
- the gas turbine plant 100 includes a gas turbine 1, an exhaust heat recovery boiler 2 (boiler), a steam turbine 4, an exhaust gas treatment facility 6, and an EGR line L2.
- the gas turbine 1 includes a compressor 11, a combustor 12, and a turbine 13.
- the compressor 11 compresses the outside air to generate high-pressure air.
- the combustor 12 produces high-temperature and high-pressure combustion gas by mixing fuel with the high-pressure air and burning it.
- the turbine 13 is driven by this combustion gas.
- the rotational energy of the turbine 13 is taken out from the shaft end and used for driving, for example, the generator G.
- the exhaust gas discharged from the turbine 13 is recovered by the exhaust line L1 and sent to the exhaust heat recovery boiler 2.
- the exhaust heat recovery boiler 2 generates superheated steam by exchanging heat between the exhaust gas flowing in the exhaust line L1 and water. This superheated steam is sent to the steam turbine 4 through the first steam line S1 and used to drive the steam turbine 4. The rotational energy of the steam turbine 4 is used, for example, to drive the generator G. The steam discharged from the steam turbine 4 is recovered by the condenser 41.
- An exhaust gas treatment facility 6 is provided on the exhaust line L1 on the downstream side of the exhaust heat recovery boiler 2.
- the exhaust gas treatment facility 6 is provided to clean the exhaust gas flowing through the exhaust line L1 and dissipate it to the outside air.
- the exhaust gas treatment equipment 6 includes a carbon dioxide recovery device 3 and an exhaust gas heating device 5.
- the carbon dioxide recovery device 3 is a device for recovering and removing carbon dioxide contained in the exhaust gas. As shown in FIG. 2, the carbon dioxide recovery device 3 includes a cooling tower 31, an absorption tower 32, and a regeneration tower 33.
- the cooling tower 31 is a facility for cooling the exhaust gas flowing through the exhaust line L1 prior to the recovery of carbon dioxide in the absorption tower 32 described later.
- a cooling line L6 is connected to the cooling tower 31.
- the cooling line L6 is a flow path in which a part of the heat medium (first medium) circulating inside the cooling tower 31 is taken out, cooled by the cooler H1, and then returned to the inside of the cooling tower 31 again.
- a pump P1, a first heating unit 51 (described later), and a cooler H1 are provided on the cooling line L6.
- the heat medium that has become hot due to heat exchange with the exhaust gas in the cooling tower 31 passes through the first heating unit 51 and the cooler H1 by the pump P1 and becomes cold, and returns to the inside of the cooling tower 31 again.
- the first heating unit 51 exchanges heat between the heat medium (first medium) circulating in the cooling line L6 and the exhaust gas discharged from the carbon capture and storage device 3. It is provided to heat the exhaust gas.
- the exhaust gas cooled by the cooling tower 31 is sent to the absorption tower 32 through the exhaust line L1.
- the absorption tower 32 has a tubular shape extending in the vertical direction, and an exhaust line L1 extending from the cooling tower 31 is connected to the lower portion thereof.
- an absorption liquid capable of chemically bonding with carbon dioxide flows from above to below.
- an aqueous solution of amine containing monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diisopropanolamine (DIPA), methyldiethanolamine (MDEA) or A water-free organic solvent, a mixture thereof, and an amino acid-based aqueous solution are preferably used.
- the absorption tower cooling line L8 is connected to the upper part of the absorption tower 32.
- the absorption tower cooling line L8 is a flow path in which a part of the heat medium for cooling the exhaust gas in the absorption tower 32 is taken out to the outside, cooled by the cooler H2, and then returned to the inside of the absorption tower 32 again. ..
- a cooler H2 and a pump P2 are provided on the absorption tower cooling line L8. The heat medium that has become hot due to heat exchange with the exhaust gas in the absorption tower 32 is sent to the cooler H2 by the pump P2 to become cold, and then sent to the absorption tower 32 again.
- the exhaust gas that has flowed into the lower part of the absorption tower 32 rises in the absorption tower 32 while contacting the absorption liquid flowing from above. At this time, carbon dioxide contained in the exhaust gas is chemically absorbed by the absorbing liquid. The residual exhaust gas from which carbon dioxide has been removed flows into the exhaust line L1 again from the upper part of the absorption tower 32.
- the absorption liquid that has absorbed carbon dioxide is sent to the regeneration tower 33 by the pump P4 through the absorption liquid recovery line L4 connected to the lower part of the absorption tower 32.
- the regeneration tower 33 is a device for regenerating (separating carbon dioxide) the absorbing liquid in a state of absorbing carbon dioxide.
- a third steam line S3 through which steam taken out from the exhaust heat recovery boiler 2 described above flows is connected to the regeneration tower 33.
- a reboiler 34 is provided on the third steam line S3. Steam from the exhaust heat recovery boiler 2 is supplied to the reboiler 34 through the third steam line S3. In the reboiler 34, a part of the water contained in the absorbing liquid is heated by the heat exchange with the steam to become stripping steam.
- the stripping steam is sent into the regeneration tower 33 through the absorption liquid extraction line L7.
- the stripping steam comes into contact with the pre-regeneration absorption liquid supplied from the absorption liquid recovery line L4.
- carbon dioxide is dissipated from the absorption liquid before regeneration, and the absorption liquid is regenerated (carbon dioxide is not contained).
- the carbon dioxide released from the absorption liquid before regeneration is sent to a carbon dioxide compression device (not shown) through a carbon dioxide recovery line L9 provided in the upper part of the regeneration tower 33.
- a part of the absorbed liquid after regeneration (that is, the component that did not become stripping steam) is sent to the absorption liquid supply line L5 connected to the lower part of the regeneration tower 33.
- a heat exchanger H4, a pump P3, and a cooler H3 are provided on the absorbent liquid supply line L5 in this order.
- the pump P3 By driving the pump P3, the regenerated absorption liquid is supplied from the regeneration tower 33 to the heat exchanger H4.
- the absorbent liquid recovery line L4 and the absorbent liquid supply line L5 intersect. As a result, heat exchange is performed between the absorption liquid before regeneration and the absorption liquid after regeneration.
- the absorbed liquid after regeneration passes through the heat exchanger H4 and the cooler H3, and becomes low in temperature.
- the regenerated absorption liquid at a low temperature is supplied to the upper part of the absorption tower 32.
- the absorption liquid recovery line L4 and the absorption liquid supply line L5 are provided with valves V1 and V2, respectively. By opening and closing these valves V1 and V2, the open state of these flow paths can be switched.
- the exhaust gas heating device 5 heats the exhaust gas in order to suppress whitening of the exhaust gas discharged from the carbon dioxide recovery device 3 via the exhaust line L1.
- the exhaust gas heating device 5 includes a first heating unit 51, a second heating unit 52, and a third heating unit 53.
- the first heating unit 51 and the second heating unit 52 heat the exhaust gas by utilizing the excess heat generated by the carbon dioxide recovery device 3.
- the first heating unit 51 is a heat exchanger HA provided on the cooling line L6 (first medium line M1) described with reference to FIG. That is, the exhaust gas is exchanged between the heat medium (first medium) used for cooling the exhaust gas in the cooling tower 31 and the exhaust gas discharged from the carbon dioxide recovery device 3 in the heat exchanger HA. Is heated.
- the temperature of the exhaust gas flowing into the first heating unit 51 is about 30 to 35 ° C. Further, the temperature of the first medium when performing heat exchange is 40 to 50 ° C. as an example. As a result, the temperature of the exhaust gas after passing through the first heating unit 51 becomes about 40 ° C.
- the cooler H1 can be omitted. That is, it is possible to make the function of the cooler H1 coexist in the heat exchanger HA.
- the second heating unit 52 is provided to further heat the exhaust gas heated by the first heating unit 51.
- the second heating unit 52 is a heat exchanger HB provided on the downstream side of the reboiler 34 described with reference to FIG. 2 (that is, the fifth steam line S5 as the second medium line M2). That is, the exhaust gas is further heated by exchanging heat between the steam as the heat medium (second medium) circulating in the reboiler 34 and the exhaust gas in the heat exchanger HB.
- the steam discharged from the heat exchanger HB is sent to the exhaust heat recovery boiler 2 through the fourth steam line S4.
- the temperature of the second medium when heat exchange is performed is, for example, 70 to 100 ° C., which is higher than that of the first medium described above. As a result, the temperature of the exhaust gas after passing through the second heating unit 52 becomes about 65 ° C.
- the third heating unit 53 is provided to further heat the exhaust gas heated by the second heating unit 52.
- High-temperature steam led from the exhaust heat recovery boiler 2 through the sixth steam line S6 flows into the third heating unit 53.
- the exhaust gas is further heated by exchanging heat between the steam and the exhaust gas.
- the temperature of the exhaust gas after passing through the third heating unit 53 becomes about 90 ° C.
- the exhaust gas is released into the outside air in a state in which white smoke is less likely to be generated due to the condensation of water.
- the EGR line L2 is a pipe for extracting at least a part of the exhaust gas that has passed through the cooling tower 31 of the carbon dioxide recovery device 3 and guiding it to the compressor 11 of the gas turbine 1.
- the temperature is higher than that of the first medium flowing through the cooling line L6 (first medium line) of the carbon dioxide capture device 3 and the first medium flowing through the fifth steam line S5 (second medium line).
- the exhaust gas discharged from the carbon dioxide recovery device 3 can be heated by the second medium.
- the excess heat generated by the carbon dioxide capture device 3 can be used for heating the exhaust gas.
- the exhaust gas can be heated in two stages by the first medium and the second medium having a temperature higher than that of the first medium, the exhaust gas is exhausted more strongly than the configuration in which only one of these media is used for heating. The gas can be heated. Thereby, the generation of white smoke can be further suppressed.
- the heat exchanger HA as the first heating unit 51 discharges from the carbon dioxide recovery device 3.
- the exhaust gas can be heated.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- a heat medium other than the absorbing liquid is used as the first medium, the influence on the environment when the absorbing liquid leaks, for example, can be suppressed to a smaller size.
- the heat exchanger HB as the second heating unit 52 was heated by the first heating unit 51 by utilizing the heat of the second medium used for the regeneration of the absorption liquid in the regeneration tower 33.
- the exhaust gas can be further heated.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- the exhaust gas can be further heated in the third heating unit 53 by the heat of the steam generated in the exhaust heat recovery boiler 2.
- the possibility of white smoke generation can be further reduced.
- the exhaust gas is concentrated by supplying a part of the exhaust gas to the gas turbine 1 again through the EGR line L2, and the carbon dioxide concentration can be increased.
- carbon dioxide can be recovered more efficiently by the carbon dioxide recovery device 3.
- the first heating unit 51 in the exhaust gas heating device 5 is different from that of the first embodiment.
- the first heating unit 51b according to the present embodiment is a heat exchanger HA provided between the pump P2 and the cooler H2 on the absorption tower cooling line L8 of the absorption tower 32.
- the cooler H2 can be omitted. That is, it is possible to make the function of the cooler H2 coexist in the heat exchanger HA.
- the heat exchanger HA as the first heating unit 51b discharges the exhaust gas from the carbon dioxide recovery device 3.
- the exhaust gas produced can be heated.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- a heat medium other than the absorbing liquid is used as the first medium, the influence on the environment when the absorbing liquid leaks, for example, can be suppressed to a smaller size.
- the heat exchanger HA as the first heating unit 51c is provided on the absorbing liquid supply line L5. More specifically, the heat exchanger HA is provided between the pump P3 and the cooler H3 on the absorbing liquid supply line L5.
- the cooler H3 can be omitted. That is, it is possible to make the function of the cooler H3 coexist in the heat exchanger HA.
- the exhaust gas can be heated by the heat exchanger HA as the first heating unit 51c by utilizing the heat of the absorption liquid heated by the regeneration of the absorption liquid in the regeneration tower 33. it can.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- the configuration of the first heating unit 51 is the same as that of the first embodiment, but the configuration of the heat exchanger HB as the second heating unit 52b is different.
- the heat exchanger HB is provided on the carbon dioxide capture line L9 extending from the upper part of the regeneration tower 33.
- the heat exchanger HB as the second heating unit 52 heats the exhaust gas heated by the first heating unit 51 by utilizing the heat of carbon dioxide discharged from the regeneration tower 33. be able to. As a result, the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- the exhaust gas treatment facility 6 is provided on the exhaust line L1 through which the exhaust gas discharged from the boiler (exhaust heat recovery boiler 2) flows and the exhaust line L1.
- a carbon dioxide recovery device 3 that recovers the carbon dioxide contained in the exhaust gas, and an exhaust gas heating device 5 that is provided on the downstream side of the carbon dioxide recovery device 3 in the exhaust line L1 and heats the exhaust gas.
- the carbon dioxide recovery device 3 has a first medium line through which the first medium is distributed and a second medium line through which the second medium having a temperature higher than that of the first medium is distributed.
- the first heating unit 51 that heats the exhaust gas by heat exchange with the first medium and the second heating unit 51 that further heats the exhaust gas that has passed through the first heating unit 51 by heat exchange with the second medium. It has a heating unit 52 and.
- the exhaust gas can be heated by the first medium line of the carbon dioxide capture device 3, the first medium circulating through the second medium line, and the second medium.
- the excess heat generated by the carbon dioxide capture device 3 can be used for heating the exhaust gas.
- the exhaust gas can be heated in two stages by the first medium and the second medium, the exhaust gas can be heated more strongly than the configuration in which only one of these media is used for heating. .. Thereby, the generation of white smoke can be further suppressed.
- the carbon dioxide recovery device 3 is an absorption tower through which an absorption liquid that chemically adsorbs carbon dioxide in the exhaust gas when it comes into contact with the exhaust gas flows. 32 and the first medium line provided in the absorption tower 32 and through which a heat medium as the first medium for cooling the exhaust gas by exchanging heat with the exhaust gas in the absorption tower 32 flows.
- the exhaust gas heating device 5 has an absorption tower cooling line L8, and is provided on the absorption tower cooling line L8 as the first heating unit 51b for heat exchange between the first medium and the exhaust gas. Has a heat exchanger HA.
- the exhaust gas can be heated by the heat exchanger HA as the first heating unit 51 by utilizing the heat taken when the exhaust gas in the absorption tower 32 is cooled.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- a heat medium other than the absorbing liquid is used as the first medium, the influence on the environment when the absorbing liquid leaks, for example, can be suppressed to a smaller size.
- the carbon dioxide recovery device 3 is an absorption tower through which an absorption liquid that chemically adsorbs carbon dioxide in the exhaust gas flows when it comes into contact with the exhaust gas. 32, a regeneration tower 33 that regenerates by heating the absorption liquid that chemically adsorbs carbon dioxide in the absorption tower 32, and the first that supplies the absorption liquid regenerated in the regeneration tower 33 to the absorption tower 32. Further having an absorption liquid supply line L5 as one medium, the exhaust gas heating device 5 is provided on the absorption liquid supply line L5, and the absorption liquid as the first medium and the exhaust gas. Has a heat exchanger HA as the first heating unit 51c that heats the exhaust gas by exchanging heat.
- the exhaust gas can be heated by the heat exchanger HA as the first heating unit 51c by utilizing the heat of the absorbing liquid heated by the regeneration.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- the carbon dioxide recovery device 3 is an absorption tower through which an absorption liquid that chemically adsorbs carbon dioxide in the exhaust gas when it comes into contact with the exhaust gas flows. 32, a regeneration tower 33 that regenerates by heating the absorption liquid that chemically adsorbs carbon dioxide in the absorption tower 32, and the first medium provided on the upstream side of the absorption tower 32 in the exhaust line L1.
- the cooling tower 31 that cools the exhaust gas by exchanging heat between the heat medium and the exhaust gas, and the first medium line through which a part of the first medium taken out from the cooling tower 31 is distributed.
- the exhaust gas heating device 5 is provided on the cooling line L6 and heats the exhaust gas by exchanging heat between the heat medium and the exhaust gas. It has a heat exchanger HA as one heating unit 51.
- the exhaust gas can be heated by the heat exchanger HA as the first heating unit 51 by utilizing the heat taken when the exhaust gas in the cooling tower 31 is cooled.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- a heat medium other than the absorbing liquid is used as the first medium, the influence on the environment when the absorbing liquid leaks, for example, can be suppressed to a smaller size.
- the carbon dioxide recovery device 3 is an absorption tower through which an absorption liquid that chemically adsorbs carbon dioxide in the exhaust gas flows when it comes into contact with the exhaust gas.
- 32 a regeneration tower 33 through which the absorption liquid in which carbon dioxide is chemically adsorbed by the absorption tower 32 flows, an absorption liquid extraction line L7 for extracting the absorption liquid in the regeneration tower 33, and the absorption liquid extraction line L7.
- the revoiler 34 which is provided above and heats and regenerates the absorbed liquid by exchanging heat between the absorbed liquid and the second medium, is further provided, and the exhaust gas heating device 5 is provided in the revoir 34. It has a heat exchanger HB as the second heating unit 52 that is connected and heats the exhaust gas by exchanging heat between the second medium and the exhaust gas.
- the exhaust gas can be heated by the heat exchanger HB as the second heating unit 52 by utilizing the heat of the second medium used for the regeneration of the absorbing liquid.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- the carbon dioxide recovery device 3 is an absorption tower through which an absorption liquid that chemically adsorbs carbon dioxide in the exhaust gas flows when it comes into contact with the exhaust gas. It has a regeneration tower 33 that heats and regenerates the absorption liquid by exchanging heat between the 32 and the absorption liquid in which carbon dioxide is chemically adsorbed by the absorption tower 32 and a heat medium as the second medium.
- the exhaust gas heating device 5 has a heat exchanger HB as the second heating unit 52b that heats the exhaust gas by exchanging heat between the carbon dioxide discharged from the regeneration tower 33 and the exhaust gas.
- the exhaust gas can be heated by the heat exchanger HB as the second heating unit 52 by utilizing the heat of carbon dioxide discharged from the regeneration tower 33.
- the heat can be effectively utilized as compared with the configuration in which the exhaust gas is heated by using, for example, another heat source.
- the exhaust gas heating device 5 has passed a part of the steam generated by the boiler (exhaust heat recovery boiler 2) and the second heating unit 52. It further has a third heating unit 53 that further heats the exhaust gas by exchanging heat with the exhaust gas.
- the exhaust gas can be further heated by the heat of the steam generated by the boiler (exhaust heat recovery boiler 2). As a result, the possibility of white smoke generation can be further reduced.
- the gas turbine plant 100 according to the eighth aspect uses the heat of the exhaust gas treatment facility 6, the gas turbine 1, and the exhaust gas according to the fourth aspect to generate steam. It includes the generated boiler (exhaust heat recovery boiler 2) and an EGR line L2 that guides at least a part of the exhaust gas that has passed through the cooling tower 31 to the gas turbine 1.
- the exhaust gas can be concentrated and the carbon dioxide concentration can be increased.
- carbon dioxide can be recovered more efficiently by the carbon dioxide recovery device 3.
- the generation of white smoke can be suppressed.
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Abstract
Description
本願は、2019年12月27日に、日本国に出願された特願2019-239000号に基づき優先権を主張し、この内容をここに援用する。
(ガスタービンプラントの構成)
以下、本開示の第一実施形態に係るガスタービンプラント100について、図1と図2を参照して説明する。図1に示すように、ガスタービンプラント100は、ガスタービン1と、排熱回収ボイラー2(ボイラー)と、蒸気タービン4と、排気ガス処理設備6と、EGRラインL2と、を備えている。
ガスタービン1は、圧縮機11と、燃焼器12と、タービン13と、を有している。圧縮機11は、外部の空気を圧縮して高圧空気を生成する。燃焼器12は、この高圧空気に燃料を混合して燃焼させることで高温高圧の燃焼ガスを生成する。タービン13は、この燃焼ガスによって駆動される。タービン13の回転エネルギーは軸端から取り出されて例えば発電機Gの駆動に利用される。タービン13から排出される排気ガスは、排気ラインL1によって回収されて、排熱回収ボイラー2に送られる。
排熱回収ボイラー2は、排気ラインL1中を流通する排ガスと水とを熱交換させることで過熱蒸気を生成する。この過熱蒸気は、第一蒸気ラインS1を通じて蒸気タービン4に送られ、当該蒸気タービン4の駆動に用いられる。蒸気タービン4の回転エネルギーは例えば発電機Gの駆動に利用される。蒸気タービン4から排出された蒸気は復水器41によって回収される。
二酸化炭素回収装置3は、排気ガス中に含まれる二酸化炭素を回収除去するための装置である。図2に示すように、二酸化炭素回収装置3は、冷却塔31と、吸収塔32と、再生塔33と、を有している。
排気ガス加熱装置5は、排気ラインL1を経て上記の二酸化炭素回収装置3から排出された排気ガスの白煙化を抑制するために排気ガスを加熱する。図1に示すように、排気ガス加熱装置5は、第一加熱部51と、第二加熱部52と、第三加熱部53と、を有している。
上記構成によれば、二酸化炭素回収装置3の冷却ラインL6(第一媒体ライン)を流通する第一媒体、及び第五蒸気ラインS5(第二媒体ライン)を流通する第一媒体よりも高温の第二媒体によって、二酸化炭素回収装置3から排出された排気ガスを加熱することができる。これにより、排気ガスが大気中に放散される際の白煙の発生を抑制することができる。つまり、上記の構成では、二酸化炭素回収装置3で生じた余剰の熱を排ガスの加熱に利用することができる。さらに、第一媒体、及び第一媒体よりも高温の第二媒体によって二段階で排気ガスを加熱することができるため、これら媒体のいずれか一方のみによる加熱を行う構成に比べて、より強く排気ガスを加熱することができる。これにより、白煙発生をさらに抑制することができる。
次に、本開示の第二実施形態について、図3を参照して説明する。なお、上記第一実施形態と同様の構成については同一の符号を付し、詳細な説明を省略する。同図に示すように、本実施形態では、排気ガス加熱装置5における第一加熱部51の構成が上記第一実施形態とは異なっている。本実施形態に係る第一加熱部51bは、吸収塔32の吸収塔冷却ラインL8上におけるポンプP2と冷却器H2との間に設けられた熱交換器HAである。なお、上記の熱交換器HAを設けた場合には、冷却器H2を省略することが可能である。つまり、熱交換器HAに冷却器H2の機能を並存させることが可能である。
続いて、本開示の第三実施形態について、図4を参照して説明する。なお、上記の各実施形態と同様の構成については同一の符号を付し、詳細な説明を省略する。同図に示すように、本実施形態では、第一加熱部51cとしての熱交換器HAが、吸収液供給ラインL5上に設けられている。より具体的には、熱交換器HAは、吸収液供給ラインL5上におけるポンプP3と冷却器H3との間に設けられている。なお、上記の熱交換器HAを設けた場合には、冷却器H3を省略することが可能である。つまり、熱交換器HAに冷却器H3の機能を並存させることが可能である。
次いで、本開示の第四実施形態について、図5を参照して説明する。なお、上記の各実施形態と同様の構成については同一の符号を付し、詳細な説明を省略する。同図に示すように、本実施形態では、第一加熱部51の構成は上記第一実施形態と同様である一方で、第二加熱部52bとしての熱交換器HBの構成が異なっている。本実施形態では、熱交換器HBが、再生塔33の上部から延びる二酸化炭素回収ラインL9上に設けられている。
以上、本開示の実施形態について図面を参照して詳述したが、具体的な構成はこの実施形態に限られるものではなく、本開示の要旨を逸脱しない範囲の設計変更等も含まれる。例えば、第四実施形態で説明した第二加熱部52bの構成を、第二実施形態及び第三実施形態の第一加熱部51b,51cと組み合わせることも可能である。
各実施形態に記載の排気ガス処理設備、及びガスタービンプラントは、例えば以下のように把握される。
1 ガスタービン
2 排熱回収ボイラー
3 二酸化炭素回収装置
4 蒸気タービン
5 排気ガス加熱装置
6 排気ガス処理設備
11 圧縮機
12 燃焼器
13 タービン
31 冷却塔
32 吸収塔
33 再生塔
34 リボイラー
51,51b,51c 第一加熱部
52,52b 第二加熱部
53 第三加熱部
G 発電機
H1,H2,H3,H4 冷却器
HA,HB 熱交換器
L1 排気ライン
L2 EGRライン
L4 吸収液回収ライン
L5 吸収液供給ライン
L6 冷却ライン
L7 吸収液抽出ライン
L8 吸収塔冷却ライン
L9 二酸化炭素回収ライン
P1,P2,P3,P4 ポンプ
S1 第一蒸気ライン
S2 第二蒸気ライン
S3 第三蒸気ライン
S4 第四蒸気ライン
S5 第五蒸気ライン
S6 第六蒸気ライン
Claims (8)
- ボイラーから排出された排気ガスが流通する排気ラインと、
前記排気ライン上に設けられ、前記排気ガスに含まれる二酸化炭素を回収する二酸化炭素回収装置と、
前記排気ラインにおける前記二酸化炭素回収装置の下流側に設けられ、前記排気ガスを加熱する排気ガス加熱装置と、
を備え、
前記二酸化炭素回収装置は、
第一媒体が流通する第一媒体ラインと、
前記第一媒体よりも高温の第二媒体が流通する第二媒体ラインと、
を有し、
前記排気ガス加熱装置は、
前記第一媒体との熱交換によって前記排気ガスを加熱する第一加熱部と、
前記第二媒体との熱交換によって前記第一加熱部を通過した前記排気ガスをさらに加熱する第二加熱部と、
を有する排気ガス処理設備。 - 前記二酸化炭素回収装置は、
前記排気ガスと接触することで該排気ガス中の二酸化炭素を化学吸着する吸収液が流通する吸収塔と、
該吸収塔に設けられ、該吸収塔内の前記排気ガスと熱交換することで該排気ガスを冷却する前記第一媒体としての熱媒体が流通する前記第一媒体ラインとしての吸収塔冷却ラインと、
を有し、
前記排気ガス加熱装置は、
前記吸収塔冷却ライン上に設けられ、前記第一媒体と前記排気ガスとを熱交換させる前記第一加熱部としての熱交換器を有する請求項1に記載の排気ガス処理設備。 - 前記二酸化炭素回収装置は、
前記排気ガスと接触することで該排気ガス中の二酸化炭素を化学吸着する吸収液が流通する吸収塔と、
前記吸収塔で二酸化炭素を化学吸着した前記吸収液を加熱することで再生する再生塔と、
該再生塔で再生された前記吸収液を前記吸収塔に供給する前記第一媒体ラインとしての吸収液供給ラインと、
をさらに有し、
前記排気ガス加熱装置は、
該吸収液供給ライン上に設けられ、前記第一媒体としての前記吸収液と前記排気ガスとを熱交換させることで該排気ガスを加熱する前記第一加熱部としての熱交換器を有する請求項1に記載の排気ガス処理設備。 - 前記二酸化炭素回収装置は、
前記排気ガスと接触することで該排気ガス中の二酸化炭素を化学吸着する吸収液が流通する吸収塔と、
前記吸収塔で二酸化炭素を化学吸着した前記吸収液を加熱することで再生する再生塔と、
前記排気ラインにおける前記吸収塔よりも上流側に設けられ、前記第一媒体としての熱媒体と前記排気ガスとを熱交換させることで該排気ガスを冷却する冷却塔と、
該冷却塔から取り出された前記第一媒体の一部が流通する前記第一媒体ラインとしての冷却ラインと、
をさらに有し、
前記排気ガス加熱装置は、
前記冷却ライン上に設けられ、前記熱媒体と前記排気ガスとを熱交換させることで該排気ガスを加熱する前記第一加熱部としての熱交換器を有する請求項1に記載の排気ガス処理設備。 - 前記二酸化炭素回収装置は、
前記排気ガスと接触することで該排気ガス中の二酸化炭素を化学吸着する吸収液が流通する吸収塔と、
前記吸収塔で二酸化炭素を化学吸着した前記吸収液が流通する再生塔と、
該再生塔内の前記吸収液を抽出する吸収液抽出ラインと、
前記吸収液抽出ライン上に設けられ、前記吸収液と前記第二媒体とを熱交換させることで前記吸収液を加熱し、再生するリボイラーと、
をさらに有し、
前記排気ガス加熱装置は、
前記リボイラーに接続され、前記第二媒体と前記排気ガスとを熱交換させることで該排気ガスを加熱する前記第二加熱部としての熱交換器を有する請求項1から4のいずれか一項に記載の排気ガス処理設備。 - 前記二酸化炭素回収装置は、
前記排気ガスと接触することで該排気ガス中の二酸化炭素を化学吸着する吸収液が流通する吸収塔と、
前記吸収塔で二酸化炭素を化学吸着した前記吸収液と前記第二媒体としての熱媒体とを熱交換させることで前記吸収液を加熱し、再生する再生塔を有し、
前記排気ガス加熱装置は、前記再生塔から排出された二酸化炭素と前記排気ガスとを熱交換させることで該排気ガスを加熱する前記第二加熱部としての熱交換器を有する請求項1から4のいずれか一項に記載の排気ガス処理設備。 - 前記排気ガス加熱装置は、前記ボイラーで生成した蒸気の一部と前記第二加熱部を通過した前記排気ガスとを熱交換させることで該排気ガスをさらに加熱する第三加熱部をさらに有する請求項1から6のいずれか一項に記載の排気ガス処理設備。
- 請求項4に記載の排気ガス処理設備と、
ガスタービンと、
前記ガスタービンからの排気ガスの熱を利用して蒸気を発生する前記ボイラーと、
前記冷却塔を通過した前記排気ガスの少なくとも一部を前記ガスタービンに導くEGRラインと、
を備えるガスタービンプラント。
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