WO2014129402A1 - 排ガス処理システム及び排ガス処理方法 - Google Patents
排ガス処理システム及び排ガス処理方法 Download PDFInfo
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- WO2014129402A1 WO2014129402A1 PCT/JP2014/053499 JP2014053499W WO2014129402A1 WO 2014129402 A1 WO2014129402 A1 WO 2014129402A1 JP 2014053499 W JP2014053499 W JP 2014053499W WO 2014129402 A1 WO2014129402 A1 WO 2014129402A1
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- exhaust gas
- heat
- recovery
- treatment system
- heat exchanger
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- 238000000034 method Methods 0.000 title claims description 55
- 238000011084 recovery Methods 0.000 claims abstract description 290
- 238000010438 heat treatment Methods 0.000 claims abstract description 103
- 238000001816 cooling Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 76
- 238000010304 firing Methods 0.000 claims description 47
- 239000002250 absorbent Substances 0.000 claims description 33
- 230000002745 absorbent Effects 0.000 claims description 33
- 230000008929 regeneration Effects 0.000 claims description 32
- 238000011069 regeneration method Methods 0.000 claims description 32
- 238000010521 absorption reaction Methods 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 description 700
- 239000012855 volatile organic compound Substances 0.000 description 207
- 238000010248 power generation Methods 0.000 description 55
- 239000003054 catalyst Substances 0.000 description 31
- 238000003672 processing method Methods 0.000 description 25
- 239000000243 solution Substances 0.000 description 16
- 239000002803 fossil fuel Substances 0.000 description 15
- 239000003949 liquefied natural gas Substances 0.000 description 14
- 238000006555 catalytic reaction Methods 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 239000000428 dust Substances 0.000 description 11
- 239000000446 fuel Substances 0.000 description 10
- 239000013618 particulate matter Substances 0.000 description 10
- 239000003208 petroleum Substances 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
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- 206010037660 Pyrexia Diseases 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 6
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- 239000002912 waste gas Substances 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 4
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000012717 electrostatic precipitator Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- GIAFURWZWWWBQT-UHFFFAOYSA-N 2-(2-aminoethoxy)ethanol Chemical compound NCCOCCO GIAFURWZWWWBQT-UHFFFAOYSA-N 0.000 description 1
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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- 230000005494 condensation Effects 0.000 description 1
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- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 1
- 229940043276 diisopropanolamine Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000000791 photochemical oxidant Substances 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
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
- B01D53/46—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
- B01D53/14—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
- B01D53/34—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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
- B01D2255/2065—Cerium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20746—Cobalt
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- 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
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- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/50—Carbon dioxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Definitions
- the present invention relates to an exhaust gas treatment system and an exhaust gas treatment method for treating exhaust gas discharged from, for example, a boiler or turbine of a power generation facility.
- steam is generated by burning fossil fuels such as coal, oil, and LNG in a boiler, and power is generated by rotating the steam turbine with this steam.
- fuel such as light oil, kerosene, and natural gas is burned and compressed, and power is generated by rotating a gas turbine with high-temperature and high-pressure gas.
- the exhaust gas discharged from the boiler or turbine contains harmful substances such as sulfur oxide (SO X ), particulate matter (PM), carbon dioxide (CO 2 ), and impurities, etc. to remove sO X and PM desulfurization cooling device, further recovering CO 2 in the CO 2 recovery apparatus, after removing, so that discharging exhaust gas from the stack to the atmosphere.
- SO X sulfur oxide
- PM particulate matter
- CO 2 carbon dioxide
- impurities etc.
- an alkanolamine-based CO 2 absorbing solution (amine-based CO 2 absorbing solution) is obtained from the exhaust gas 3 that has been processed by the desulfurization cooling device 2 and reduced in temperature. was heated an absorption tower 5 which lean solution 4) and in contact with to absorb CO 2, CO 2 absorbent having absorbed CO 2 absorption tower 5 (rich solution 6), CO 2 from the CO 2 absorbing solution 6 And a regeneration tower 7 that desorbs and recovers the catalyst (see Patent Document 1 and Patent Document 2).
- the CO 2 absorbent 4 from which most of the CO 2 has been removed by the regeneration tower 7 is sent to the absorption tower 5 and used again for absorbing CO 2 . That is, in the CO 2 recovery device 1, CO 2 is recovered and removed from the exhaust gas 3 while circulating the CO 2 absorbents 4 and 6 between the absorption tower 5 and the regeneration tower 7.
- the CO 2 recovered by the regeneration tower 7 is processed as compressed CO 2 by the compressor 8.
- compressed CO 2 can be used as CO 2 for enhanced oil recovery (EOR) to increase the amount of oil (crude oil) collected and increase the oil recovery rate, or released into the atmosphere. In order to prevent global warming, it is processed by storing it in the deep underground.
- EOR enhanced oil recovery
- exhaust gases discharged from boilers and turbines include a wide variety of materials such as toluene, xylene, and ethyl acetate, in addition to sulfur oxide (SO X ), particulate matter (PM), and carbon dioxide (CO 2 ).
- Volatile organic compounds (VOC) are included. When this type of VOC is released into the atmosphere and irradiated with sunlight (particularly ultraviolet rays) in a state where it is mixed with nitrogen oxides (NO x ), a photochemical oxidant is generated by a photochemical reaction. For this reason, it is required to remove VOC from exhaust gas discharged from a boiler or turbine.
- VOC in the exhaust gas can be decomposed and removed (reduced).
- a large amount of exhaust gas is generated at a thermal power plant or the like, it is difficult to combust all the large amount of exhaust gas from the viewpoint of economy and the like.
- VOC decomposition catalyst VOC removal device
- this VOC decomposition catalyst VOC removal device
- the thermal power plants it is necessary to lower temperatures of the exhaust gas in order to increase the absorption efficiency of the CO 2 to the CO 2 absorbing solution in the CO 2 recovery apparatus, the exhaust gas after the treatment with the CO 2 recovery apparatus
- the temperature is about 30 to 40 ° C., for example. Therefore, in the thermal power plant, the CO 2 thereby removing from the flue gas in the CO 2 recovery apparatus, method for removing VOC in VOC removal apparatus from the exhaust gas after the treatment with the CO 2 recovery apparatus is strongly demanded .
- an exhaust gas treatment system includes a CO 2 recovery device that recovers CO 2 from exhaust gas discharged from a boiler or a turbine, and VOC from the exhaust gas that has been processed by the CO 2 recovery device.
- An exhaust gas treatment system including a VOC removal device to be removed, the heating means for heating the exhaust gas after being treated by the CO 2 recovery device and before being treated by the VOC removal device, and the VOC removal device Cooling means for cooling the exhaust gas after the treatment.
- the heating means may include a duct firing device that heats the exhaust gas after being treated by the CO 2 recovery device that circulates in the duct by a flame formed by a burner.
- a first heat exchanger that absorbs heat of exhaust gas into a heat medium is provided between the boiler or the turbine and the CO 2 recovery device.
- the heating means includes a second heat exchanger that heats the exhaust gas after the heat is discharged from the heat medium fed from the first heat exchanger and is processed by the CO 2 recovery device. Also good.
- the cooling means includes a third heat exchanger that absorbs heat of the exhaust gas after being treated by the VOC removal device into a heat medium
- the heating means may include a fourth heat exchanger that heats the exhaust gas after releasing heat from the heat medium fed from the third heat exchanger and treating the heat medium with the CO 2 recovery device.
- the CO 2 recovery device contacts the exhaust gas discharged from the boiler or turbine with the CO 2 absorbing liquid, and absorbs CO 2 from the exhaust gas. Play the absorption tower to remove water vapor by heating the CO 2 absorbing solution that has absorbed CO 2 in the absorption tower with, the CO 2 absorbing solution and while recovered by release of CO 2 from the CO 2 absorbing solution.
- a regenerator to be regenerated, and the cooling means includes a first exhaust heat recovery boiler that generates steam with the heat of the exhaust gas after being processed by the VOC removal device, and regenerating the CO 2 recovery device steam for heating the towers CO 2 absorbing liquid may be a water vapor generated in the first exhaust heat recovery boiler.
- the heating means includes a steam heating device that heats the exhaust gas after being treated by the CO 2 recovery device with steam,
- steam which heats exhaust gas may be the water vapor
- a second exhaust heat recovery boiler that generates steam with the heat of exhaust gas is provided between the boiler or the turbine and the CO 2 recovery device.
- the steam that heats the CO 2 absorbent in the regeneration tower of the CO 2 recovery device and / or the steam of the steam heating device that heats the exhaust gas after being treated by the CO 2 recovery device is the second exhaust gas. Steam generated by a heat recovery boiler may be used.
- a seventh aspect of the present invention in the exhaust gas treatment system, there is provided a fifth heat exchanger that causes the heat medium to absorb the heat of the exhaust gas discharged from another boiler or another turbine, and the heating means There may be provided a sixth heat exchanger for heating the exhaust gas after treatment by the CO 2 recovery apparatus heat is released from the fed heat medium from the fifth heat exchanger.
- a third exhaust heat recovery boiler that generates steam with the heat of the exhaust gas discharged from another boiler or another turbine
- the heating means Is provided with a steam heating device that heats the exhaust gas after being treated by the CO 2 recovery device with steam, and the steam that heats the exhaust gas with the steam heating device is the steam generated by the third exhaust heat recovery boiler Good.
- an exhaust gas treatment method the CO 2 is recovered from the exhaust gas discharged from the boiler or turbine by the CO 2 recovery apparatus, after the treatment with the CO 2 recovery apparatus by VOC removal apparatus
- the exhaust gas treatment method for removing VOC from exhaust gas the exhaust gas after being treated by the CO 2 recovery device and before being treated by the VOC removal device is heated by a heating means and treated by the VOC removal device Was cooled with a cooling means.
- the VOC removal device is heated by heating the exhaust gas that has been cooled to, for example, about 30 to 40 ° C. after being treated by the CO 2 recovery device by heating means such as a duct firing device.
- the exhaust gas before the treatment can be heated to 200 to 300 ° C. or higher.
- the temperature of the exhaust gas whose temperature has been reduced after CO 2 is recovered by the CO 2 recovery device is increased to a temperature at which VOC can be decomposed (or adsorbed) by the catalyst and removed. It is possible to recover and remove CO 2 with a CO 2 recovery device from a large-capacity exhaust gas generated in a power generation facility such as a thermal power plant, and to reliably remove VOC by a catalytic reaction of the VOC removal device. It becomes possible.
- FIG. 1 is a diagram illustrating an exhaust gas treatment system and an exhaust gas treatment method according to a first embodiment of the present invention. It is a figure which shows the exhaust gas processing system and exhaust gas processing method which concern on 2nd Embodiment of this invention. It is a figure which shows the exhaust gas processing system and exhaust gas processing method which concern on 3rd Embodiment of this invention. It is a figure which shows the exhaust gas processing system and exhaust gas processing method which concern on 4th Embodiment of this invention. It is a figure which shows the exhaust gas processing system and exhaust gas processing method which concern on 5th Embodiment of this invention. It is a figure which shows the exhaust gas processing system and exhaust gas processing method which concern on 6th Embodiment of this invention.
- the exhaust gas treatment system according to the present embodiment will be described as an exhaust gas treatment system for treating exhaust gas discharged from power generation equipment such as a thermal power plant.
- the power generation facility according to the exhaust gas treatment system A of the present embodiment is a boiler that generates steam for turning a power generation turbine by burning a large amount of fossil fuel such as coal, petroleum, and LNG. 10 is provided.
- the exhaust gas treatment system A of this embodiment is for treating the exhaust gas 3 discharged from the boiler 10, and includes an air heater (A / H) 11, a first heat exchanger (GGH) 12, and an electric A dust collector (ESP) 13, a blower 14 such as an induction blower (IDF), a wet scrubber (WFGD) 15, a CO 2 recovery device 1, a second heat exchanger (GGH) 16, and a duct firing device 17, a fourth heat exchanger (GGH) 18, a VOC removal device 19, and a third heat exchanger (GGH) 20.
- the exhaust gas treatment system A includes the air heater 11 to the third heat exchanger 20 in the above order until the exhaust gas 3 discharged from the boiler 10 is released to the atmosphere by the chimney 21.
- the air heater 11 is installed for recovering heat from the exhaust gas at the boiler outlet and preheating the combustion air for burning the fossil fuel in the boiler. Therefore, the exhaust gas at 350 to 400 ° C. at the boiler outlet (economizer outlet) is cooled to about 130 to 170 ° C.
- the first heat exchanger 12 uses a liquid heat medium 22 and performs heat exchange between the heat medium 22 and the exhaust gas 3. Further, the heat medium 22 of the first heat exchanger 12 circulates with the second heat exchanger 16 that also performs heat exchange with the exhaust gas 3, and the heat of the exhaust gas 3 is transferred by the first heat exchanger 12. The absorbed heat medium 22 is fed to the second heat exchanger 16, and the heat of the heat medium 22 is released to the exhaust gas 3 by the second heat exchanger 16. At this time, the amount of heat absorbed from the exhaust gas 3 by the first heat exchanger 12 is set to an amount of heat that does not cause condensation in the subsequent electric dust collector 13.
- the electric dust collector 13 is, for example, a dust collector that applies electrostatic force, and includes a discharge electrode and a dust collector plate.
- electrostatic precipitator 13 when a high voltage is applied to the discharge electrode, electrolysis is formed between the discharge plate and the gas surrounding the discharge electrode. And if the exhaust gas flows between the discharge electrode where the gas ionized by this ionization exists and the dust collecting plate, dust, mist (smoke, particulate matter (PM)), etc. in the exhaust gas 3 are charged and collected by Coulomb force. It is collected in a dust plate. Thereby, the smoke body, particulate matter (PM), etc. in the exhaust gas 3 are removed by the electrostatic precipitator 13.
- the blower 14 such as an induction blower circulates the exhaust gas 3 so as to be sequentially processed by each device from the boiler 10 to the chimney 21 by its driving.
- the wet scrubber 15 introduces the exhaust gas 3, sprays washing water or an absorbent containing an alkaline absorbent, and brings the spray liquid and the exhaust gas 3 into contact with each other, whereby particulate matter in the exhaust gas 3, sulfur oxide (SOX) ), Nitrogen oxides (NOX) and the like are adsorbed / absorbed by the spray liquid and removed from the exhaust gas 3.
- the wet scrubber 15 also cools the exhaust gas 3 and exhibits the effect of increasing the recovery efficiency of CO 2 in the exhaust gas 3 and the absorption efficiency by the CO 2 absorbent in the subsequent CO 2 recovery device 1.
- the CO 2 recovery apparatus 1 is the same as that shown in FIG. 14, and an absorption tower 5 for removing CO 2 from the exhaust gas 3 by bringing the exhaust gas 3 and the CO 2 absorbent 4 into contact with each other. accept the CO 2 absorbing solution 6 that has absorbed CO 2, and a regeneration tower 7 for separating and recovering CO 2 absorbed into the CO 2 absorbing liquid 6.
- the absorption tower 5 circulates the exhaust gas 3 introduced from the wet scrubber 15 through the duct from the lower part to the upper part, and sprays the CO 2 absorbent 4 with the absorbent scrubber 23. Thereby, the CO 2 absorbent 4 and the exhaust gas 3 come into contact with each other, and the CO 2 in the exhaust gas 3 dissolves in the CO 2 absorbent 4 and is removed. Moreover, CO 2 absorbing solution 6 that has absorbed CO 2 is accumulated in the lower portion of the absorption tower 5.
- an amine-based absorbent can be employed as the CO 2 absorbent 4.
- alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, methyldiethanolamine, diisopropanolamine, and diglycolamine can be employed as the CO 2 absorbent 4.
- hindered amines can be employed. Each of these single aqueous solutions or a mixed aqueous solution of two or more of these can be used as the CO 2 absorbent.
- Regeneration tower 7, separating and recovering CO 2 from the CO 2 absorbing solution 6 that has absorbed CO 2 and the like in the absorption tower 5.
- the CO 2 absorbent (rich liquid) 6 accumulated in the lower part of the absorption tower 5 is supplied to the regeneration tower 7 from the upper side.
- the regenerator 7 is supplied with the high temperature steam from the lower side, by heating the CO 2 absorbing solution 6 which has fallen, CO 2 from the CO 2 absorbing solution 6 is gasified dissociated. Then, the CO 2 gasified from the upper part of the regeneration tower 7 is led out and cooled and recovered.
- the CO 2 absorption liquid (lean liquid) 4 from which CO 2 has been dissociated and removed is accumulated in the lower part of the regeneration tower 7, drives the return pump 25, is further cooled by the cooler 26, and is sent to the absorption tower 5. It is done. Then, the CO 2 absorbent 4 returned from the regeneration tower 7 is supplied from the absorbent scrubber 23 into the absorption tower 5, absorbs CO 2 again, and accumulates in the lower part of the absorption tower 5. That is, in this CO 2 recovery apparatus 1, the CO 2 absorption liquid 6 that has absorbed CO 2 and the like from the absorption tower 5 is sent to the regeneration tower 7 through the absorption liquid feed pipe, and the CO 2 from which CO 2 has been recovered by the regeneration tower 7. The two absorbents 4 are returned from the regeneration tower 7 to the absorption tower 5 again through the absorbent supply pipe, and the CO 2 absorbents 4 and 6 are circulated between the absorption tower 5 and the regeneration tower 7.
- the exhaust gas 3 from which CO 2 has been removed by the CO 2 recovery device 1 passes through the second heat exchanger 16 that is a heating means and absorbs heat by the first heat exchanger 12. Then, heat is released from the heat medium 22 sent to the second heat exchanger 16 to the exhaust gas 3 and heated.
- the duct firing device 17 includes a burner, burns fuel such as natural gas to form a flame, and heats the exhaust gas 3 flowing through the duct by this flame.
- the exhaust gas 3 after being heated by the duct firing device 17 is further heated by the fourth heat exchanger 18 which is a heating means.
- the heat medium 27 that releases heat to the exhaust gas 3 by the fourth heat exchanger 18 circulates between the third heat exchanger 20 at the subsequent stage that also performs heat exchange with the exhaust gas 3.
- fever of the waste gas 3 with the 3rd heat exchanger 20 which is a cooling means is sent to the 4th heat exchanger 18, and the heat
- the exhaust gas 3 before being processed by the VOC removal device 19 is further heated by the fourth heat exchanger 18.
- the VOC removal device 19 includes a noble metal such as platinum, cobalt, cerium, or the like as a catalyst, and decomposes and / or adsorbs and removes VOC (volatile organic compound) in the exhaust gas 3 by a catalytic reaction.
- the exhaust gas 3 from which the VOC has been removed by the VOC removal device 19 passes through the third heat exchanger 20 and, as described above, the heat is absorbed by the heat medium 27 and is cooled to a predetermined temperature in the chimney. 21 is released into the atmosphere.
- duct fire is used as a heating means for heating the exhaust gas 3 after being treated by the CO 2 recovery device 1 and before being treated by the VOC removal device 19.
- a ring device 17 is provided.
- the exhaust gas 3 was low temperature after the treatment with the CO 2 recovery apparatus 1, VOC by the duct firing device 17 It can be heated to 200 to 300 ° C. or higher before being supplied to the removing device 19.
- the exhaust gas treatment system A and an exhaust gas processing method of the embodiment with respect to the exhaust gas 3 of large capacity generated from power generation equipment, it is possible to recover the CO 2 at a CO 2 recovery apparatus 1, the CO 2 It is possible to raise the temperature of the exhaust gas 3 whose temperature has been lowered after the CO 2 is recovered by the recovery device 1 to a temperature at which the VOC can be decomposed / adsorbed by the catalyst and removed.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the heat medium 22 that has absorbed the heat is the second heat exchanger 16 as the heating means.
- the exhaust gas 3 before being processed by the VOC removal device 19 can be heated.
- the second heat exchanger 16 can also raise the temperature of the exhaust gas 3 to a temperature necessary for processing with the VOC removal device 19.
- the heat of the exhaust gas 3 is absorbed by the heat medium 27 by the third heat exchanger 20 of the cooling means, The heat medium 27 that has absorbed the heat is sent to the fourth heat exchanger 18 of the heating means, and the exhaust gas 3 before being processed by the VOC removal device 19 can be heated.
- fever of the waste gas 3 is collect
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12 and the exhaust gas 3 before being processed by the VOC removal device 19 can be heated by the second heat exchanger 16, the third heat exchanger 20, the heat of the exhaust gas 3 is absorbed and the exhaust gas 3 before being processed by the VOC removal device 19 can be heated by the fourth heat exchanger 18, so even if the heating by the duct firing device 17 is reduced
- the exhaust gas 3 can be heated to a temperature at which the VOC removal device 19 can remove the VOC.
- fuel such as natural gas required for heating the exhaust gas 3 by the duct firing device 17 can be reduced, and the running cost of the exhaust gas treatment system A can be reduced. That is, the exhaust gas 3 can be treated efficiently, economically, and energy saving.
- FIG. 1 An exhaust gas treatment system and an exhaust gas treatment method according to a second embodiment of the present invention will be described with reference to FIG.
- This embodiment relates to an exhaust gas treatment system for treating exhaust gas discharged from a boiler of a power generation facility such as a thermal power plant, similarly to the exhaust gas treatment system of the first embodiment. Accordingly, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the power generation facility according to the exhaust gas treatment system A of the present embodiment is a boiler that generates steam for turning a turbine for power generation by burning a large amount of fossil fuel such as coal, oil, and LNG. 10 is provided.
- the exhaust gas treatment system A of the present embodiment includes an air heater 11, a first heat exchanger 12, an electric dust collector 13, a blower 14 such as an induction blower, a wet scrubber 15, and a CO 2 recovery device 1.
- the second heat exchanger 16, the duct firing device 17, and the VOC removal device 19 are provided.
- the exhaust gas treatment system A of the present embodiment does not include the fourth heat exchanger 18 and the third heat exchanger 20 with respect to the first embodiment, and instead of these heat exchangers, a VOC removal device 19 and a chimney 21 are provided.
- the first exhaust heat recovery boiler (HRSG) 30 of the cooling means is provided.
- the exhaust gas 3 after being treated by the CO 2 recovery device 1 and before being treated by the VOC removal device 19 is treated as in the first embodiment.
- a duct firing device 17 is provided as a heating means for heating.
- the exhaust gas 3 was low temperature after the treatment with the CO 2 recovery apparatus 1, VOC by the duct firing device 17 Before supplying to the removal apparatus 19, it can heat and can raise in temperature.
- the exhaust gas treatment system A and an exhaust gas processing method of the embodiment with respect to the exhaust gas 3 of large capacity generated from power generation equipment, it is possible to recover the CO 2 at a CO 2 recovery apparatus 1, the CO 2 It is possible to raise the temperature of the exhaust gas 3 whose temperature has been lowered after the CO 2 is recovered by the recovery device 1 to a temperature at which the VOC can be decomposed / adsorbed by the catalyst and removed.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the heat medium 22 that has absorbed this heat is the heating means.
- the exhaust gas 3 before being processed by the VOC removing device 19 can be heated.
- the second heat exchanger 16 can also raise the temperature of the exhaust gas 3 to a temperature necessary for processing with the VOC removal device 19.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the exhaust gas 3 before being processed by the VOC removal device 19 can be heated by the second heat exchanger 16, so the heating by the duct firing device 17 Even if it is reduced, the exhaust gas 3 can be heated to a temperature at which the VOC removal device 19 can reliably remove the VOC.
- fuel such as natural gas required for heating the exhaust gas 3 by the duct firing device 17 can be reduced, and the running cost of the exhaust gas treatment system A can be reduced.
- the exhaust gas 3 that has been heated to high temperature by the heating means of the duct firing device 17 and the second heat exchanger 16 and decomposed / adsorbed by the VOC removal device 19 is sent to the first exhaust heat recovery boiler 30 of the cooling means. It is done. Then, the steam 31 is generated by the first exhaust heat recovery boiler 30 using the heat of the high temperature exhaust gas 3.
- the water vapor 31 thus generated in the first exhaust heat recovery boiler 30 is sent to the regeneration tower 7 of the CO 2 recovery device 1, and this water vapor 31 is used. Then, the CO 2 absorbent 6 is heated. Thereby, the water vapor 31 can be generated by the heat recovered from the exhaust gas 3 by the first exhaust heat recovery boiler 30, and CO 2 can be recovered from the exhaust gas 3 by using the water vapor 31 in the CO 2 recovery device 1. it can. Therefore, it is not necessary to separately generate steam in the boiler 10, or the consumption of steam can be reduced, and the running cost of the exhaust gas treatment system A can be reduced while removing CO 2 and VOC from the exhaust gas 3. It becomes possible.
- the high-temperature exhaust gas 3 after being treated with the VOC removal device 19 can be cooled. For this reason, the exhaust gas 3 can be reliably cooled to a predetermined temperature or lower and released from the chimney 21 to the atmosphere.
- FIG. 1 An exhaust gas treatment system and an exhaust gas treatment method according to a third embodiment of the present invention will be described with reference to FIG.
- This embodiment relates to an exhaust gas treatment system for treating exhaust gas discharged from a boiler of a power generation facility such as a thermal power plant, similarly to the exhaust gas treatment systems of the first embodiment and the second embodiment. Therefore, the same reference numerals are given to the same configurations as those in the first embodiment and the second embodiment, and detailed description thereof is omitted.
- the power generation facility according to the exhaust gas treatment system A of the present embodiment is a boiler that generates steam for turning a turbine for power generation by burning a large amount of fossil fuel such as coal, petroleum, and LNG. 10 is provided.
- the exhaust gas treatment system A of the present embodiment is similar to the first embodiment in that the air heater 11, the first heat exchanger 12, the electrostatic precipitator 13, the blower 14 such as an induction blower, and the wet scrubber 15
- the CO 2 recovery device 1, the second heat exchanger 16, the fourth heat exchanger 18, the VOC removal device 19, and the third heat exchanger 20 are configured.
- the exhaust gas treatment system A of the present embodiment does not include the duct firing device 17 and is provided between the fourth heat exchanger 18 serving as a heating unit and the VOC removal device 19. Further, a steam heating device 33 as a heating means for heating the exhaust gas 3 before being processed by the VOC removing device 19 with the steam 32 is provided.
- the steam heating device 33 is fed with high-pressure and high-temperature steam 32 generated in the boiler 10, and heats the exhaust gas 3 using the steam 32 of the boiler 10.
- the temperature of the exhaust gas 3 that has been lowered after being treated by the CO 2 recovery device 1 is increased before being supplied to the VOC removal device 19 by the steam heating device 33. Heating with water vapor 32 makes it possible to increase the temperature.
- the exhaust gas treatment system A and an exhaust gas processing method of the embodiment with respect to the exhaust gas 3 of large capacity generated from power generation equipment, it is possible to recover the CO 2 at a CO 2 recovery apparatus 1, the CO 2 It is possible to raise the temperature of the exhaust gas 3 whose temperature has been lowered after the CO 2 is recovered by the recovery device 1 to a temperature at which the VOC can be decomposed / adsorbed by the catalyst and removed.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the heat medium 22 that has absorbed this heat is the heating means.
- the exhaust gas 3 before being processed by the VOC removing device 19 can be heated.
- the second heat exchanger 16 can also raise the temperature of the exhaust gas 3 to a temperature necessary for processing with the VOC removal device 19.
- the heat of the exhaust gas 3 is absorbed by the heat medium 27 by the third heat exchanger 20 of the cooling means, The heat medium 27 that has absorbed the heat is sent to the fourth heat exchanger 18 of the heating means, and the exhaust gas 3 before being processed by the VOC removal device 19 can be heated.
- fever of the waste gas 3 is collect
- the exhaust gas 3 can be heated to a temperature at which the VOC removal device 19 can remove the VOC. That is, the amount of water vapor 32 generated in the boiler 10 can be reduced in the steam heating device 33. As a result, the fuel consumed in the boiler 10 can be reduced, and the running cost of the exhaust gas treatment system A can be reduced. It becomes possible to plan.
- FIG. 1 An exhaust gas treatment system and an exhaust gas treatment method according to a fourth embodiment of the present invention will be described with reference to FIG.
- This embodiment relates to an exhaust gas treatment system for treating exhaust gas discharged from a boiler of a power generation facility such as a thermal power plant, similarly to the exhaust gas treatment systems of the first to third embodiments. Therefore, the same components as those in the first to third embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
- the power generation facility burns a large amount of fossil fuel such as coal, oil, and LNG, and generates a steam for turning a turbine for power generation. 10 is provided.
- the exhaust gas treatment system A of the present embodiment includes an air heater 11, a first heat exchanger 12, an electric dust collector 13, a blower 14 such as an induction blower, a wet scrubber 15, and a CO 2 recovery device 1.
- the second heat exchanger 16 and the VOC removal device 19 are provided.
- a first exhaust heat recovery boiler 30 as a cooling means is provided between the VOC removal device 19 and the chimney 21.
- a steam heating device 33 that heats the exhaust gas 3 before being processed by the VOC removal device 19 with the steam 32 is provided between the second heat exchanger 16 and the VOC removal device 19.
- the steam heater 33 is supplied with high-pressure and high-temperature steam 32 from the boiler 10, and heats the exhaust gas 3 using the steam 32 of the boiler 10.
- the temperature of the exhaust gas 3 that has been lowered after being treated by the CO 2 recovery device 1 is increased before being supplied to the VOC removal device 19 by the steam heating device 33. Heating with water vapor 32 makes it possible to increase the temperature.
- the exhaust gas treatment system A and an exhaust gas processing method of the embodiment with respect to the exhaust gas 3 of large capacity generated from power generation equipment, it is possible to recover the CO 2 at a CO 2 recovery apparatus 1, the CO 2 It is possible to raise the temperature of the exhaust gas 3 whose temperature has been lowered after the CO 2 is recovered by the recovery device 1 to a temperature at which the VOC can be decomposed / adsorbed by the catalyst and removed.
- the heat medium 27 that has absorbed the heat of the exhaust gas 3 by the first heat exchanger 12 is the second heat exchanger of the heating means. 16 and the exhaust gas 3 before being processed by the VOC removing device 19 can be heated. Thereby, between the CO 2 recovery device 1 and the VOC removal device 19, the second heat exchanger 16 can also raise the temperature of the exhaust gas 3 to a temperature necessary for processing with the VOC removal device 19.
- the heating by the steam heating device 33 is performed. Even if it is reduced, the exhaust gas 3 can be heated to a temperature at which the VOC removal device 19 can reliably remove the VOC. That is, the amount of steam 32 generated in the boiler 10 used in the steam heating device 33 can be reduced, the fuel consumed in the boiler 10 can be reduced, and the running cost of the exhaust gas treatment system A can be reduced. It becomes possible.
- the exhaust gas 3 after the temperature is raised by the heating means of the second heat exchanger 16 and the steam heating device 33 and the VOC is decomposed / adsorbed and removed by the VOC removal device 19 becomes the first exhaust of the cooling means. It is sent to the heat recovery boiler 30. Then, the steam 31 is generated by the first exhaust heat recovery boiler 30 using the heat of the high temperature exhaust gas 3.
- the water vapor 31 thus generated in the first exhaust heat recovery boiler 30 is sent to the regeneration tower 7 of the CO 2 recovery device 1, and the water vapor 31 is used to make CO 2 2 Absorbing liquid 6 is heated.
- the water vapor 31 can be generated by the heat recovered from the exhaust gas 3 by the first exhaust heat recovery boiler 30, and CO 2 can be recovered from the exhaust gas 3 by using the water vapor 31 in the CO 2 recovery device 1. it can. Therefore, it is not necessary to separately generate steam in the boiler 10, or the consumption of steam can be reduced, and the running cost of the exhaust gas treatment system A can be reduced while removing CO 2 and VOC from the exhaust gas 3. It becomes possible.
- the high-temperature exhaust gas 3 after being treated with the VOC removal device 19 can be cooled. For this reason, the exhaust gas 3 can be reliably cooled to a predetermined temperature or lower and released from the chimney 21 to the atmosphere.
- the power generation facility according to the exhaust gas treatment system A of the present embodiment includes a power generation gas turbine 34 that is driven by burning fossil fuels such as petroleum and LNG, as shown in FIG.
- the exhaust gas treatment system A of the present embodiment includes a duct firing device 17, a first heat exchanger 12, a second exhaust heat recovery boiler 35, a CO 2 recovery device 1, and a second heat exchanger 16. , A fourth heat exchanger 18, a VOC removal device 19, and a third heat exchanger 20.
- the exhaust gas treatment system A of the present embodiment moves the third heat exchanger 20 from the duct firing device 17 in the above order until the exhaust gas 3 discharged from the gas turbine 34 is released to the atmosphere by the chimney 21. I have.
- the high-temperature exhaust gas 3 discharged from the gas turbine 34 is further heated to a high temperature by the duct firing device 17.
- the exhaust gas 3 thus heated passes through the first heat exchanger 12, and the heat of the exhaust gas 3 is absorbed by the heat medium 22 by the first heat exchanger 12.
- the heat medium 22 that has absorbed heat from the exhaust gas 3 by the first heat exchanger 12 is fed to the second heat exchanger 16 disposed in the rear stage of the CO 2 recovery device 1 and circulated.
- the heat absorbed from the exhaust gas 3 by the first heat exchanger 12 is released from the heat medium 22 to the exhaust gas 3 by the second heat exchanger 16 of the heating means, and after being processed by the CO 2 recovery device 1, and The exhaust gas 3 before being processed by the VOC removing device 19 is heated.
- the exhaust gas 3 that has released heat through the first heat exchanger 12 is still in a high temperature state, and the exhaust gas 3 is sent to the second exhaust heat recovery boiler 35 to generate water vapor 36.
- the water vapor 36 generated in the second exhaust heat recovery boiler 35 is sent to the regeneration tower 7 of the CO 2 recovery apparatus 1, and the CO 2 absorbent 6 is heated using this water vapor 36.
- the water vapor 36 can be generated by the heat recovered from the exhaust gas 3 by the second exhaust heat recovery boiler 35, and the CO 2 recovery device 1 can be used to recover CO 2 from the exhaust gas 3. it can.
- the low temperature exhaust gas 3 after CO 2 is recovered by the CO 2 recovery device 1 passes through the second heat exchanger 16 and is heated. Further, the heat absorbed by the third heat exchanger 20 provided between the VOC removal device 19 and the chimney 21 is sent to the fourth heat exchanger 18 of the heating means through the heat medium 27, and this fourth heat exchanger 18. Thus, the exhaust gas 3 before being processed by the VOC removal device 19 is further heated.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the heat medium 22 that has absorbed this heat is the second heat exchanger 16 of the heating means.
- the exhaust gas 3 before being processed by the VOC removal device 19 can be heated.
- the heat of the exhaust gas 3 is recovered by the third heat exchanger 20 before being emitted from the chimney 21, and the exhaust gas 3 is also brought to a temperature necessary for processing by the VOC removal device 19 by the fourth heat exchanger 18.
- the temperature can be increased.
- by absorbing and cooling the heat of the exhaust gas 3 by the third heat exchanger 20 it becomes possible to reliably reduce the temperature of the exhaust gas 3 to a predetermined temperature or less and release it from the chimney 21 to the atmosphere.
- the third heat exchanger 20 can absorb the heat of the exhaust gas 3 and the exhaust gas 3 before being processed by the VOC removal device 19 can be heated by the fourth heat exchanger 18, so that the VOC removal device 19 can reliably remove the VOC.
- the exhaust gas 3 can be heated to a high temperature.
- the exhaust gas treatment system A and an exhaust gas processing method of the embodiment with respect to the exhaust gas 3 of large capacity generated from power generation equipment, it is possible to recover the CO 2 at a CO 2 recovery apparatus 1, the CO 2 It is possible to raise the temperature of the exhaust gas 3 whose temperature has been lowered after the CO 2 is recovered by the recovery device 1 to a temperature at which the VOC can be decomposed / adsorbed by the catalyst and removed.
- the water vapor 36 can be generated by the heat recovered from the exhaust gas 3 by the second exhaust heat recovery boiler 35, and the CO 2 recovery device 1 can be used to recover CO 2 from the exhaust gas 3. it can. Therefore, it is not necessary to separately generate water vapor with an auxiliary boiler or the like in the CO 2 recovery apparatus 1 or the consumption of water vapor can be reduced, and CO 2 and VOC can be reliably removed from the exhaust gas 3. At the same time, the running cost can be reduced.
- the present embodiment relates to an exhaust gas treatment system for treating exhaust gas discharged from a gas turbine of a power generation facility. Therefore, the same reference numerals are given to the same configuration as that of the fifth embodiment and other configurations similar to those of the first to fourth embodiments, and detailed description thereof will be omitted.
- the power generation facility according to the exhaust gas treatment system A of the present embodiment includes a power generation gas turbine 34 that is driven by burning fossil fuel such as petroleum or LNG as shown in FIG.
- the exhaust gas treatment system A of the present embodiment includes a duct firing device 17, a first heat exchanger 12, a second exhaust heat recovery boiler 35, a CO 2 recovery device 1, and a second heat exchanger 16. , And a VOC removing device 19.
- the exhaust gas treatment system A of the present embodiment is different from the fifth embodiment in that the fourth heat exchanger 18 and the third heat exchanger 20 are not provided, and the first exhaust heat is provided between the VOC removal device 19 and the chimney 21.
- a recovery boiler 30 is provided.
- the high-temperature exhaust gas 3 discharged from the gas turbine 34 is heated to a higher temperature by the duct firing device 17 as in the fifth embodiment.
- the exhaust gas 3 heated in this way passes through the first heat exchanger 12, and the heat of the exhaust gas 3 is absorbed by the heat medium 22 by the first heat exchanger 12.
- the heat medium 22 that has absorbed heat from the exhaust gas 3 by the first heat exchanger 12 is fed to the second heat exchanger 16 disposed in the rear stage of the CO 2 recovery device 1 and circulated.
- the heat absorbed from the exhaust gas 3 by the first heat exchanger 12 is released from the heat medium 22 to the exhaust gas 3 by the second heat exchanger 16 of the heating means, and after being processed by the CO 2 recovery device 1, and The exhaust gas 3 before being processed by the VOC removing device 19 is heated.
- the exhaust gas 3 that has released heat through the first heat exchanger 12 is still in a high temperature state, and the exhaust gas 3 is sent to the second exhaust heat recovery boiler 35 to generate water vapor 36.
- the exhaust gas 3 is sent to the CO 2 recovering apparatus 1 is low temperature, with respect to the exhaust gas 3 of large capacity generated from the gas turbine 34 of the power plant, and recovering the CO 2 efficiently in the CO 2 recovery apparatus 1 Can do.
- the water vapor 36 generated in the second exhaust heat recovery boiler 35 is sent to the regeneration tower 7 of the CO 2 recovery apparatus 1, and the CO 2 absorbent 6 is heated using this water vapor 36.
- the water vapor 36 can be generated by the heat recovered from the exhaust gas 3 by the second exhaust heat recovery boiler 35, and the CO 2 recovery device 1 can be used to recover CO 2 from the exhaust gas 3. it can.
- the low-temperature exhaust gas 3 after CO 2 is recovered by the CO 2 recovery device 1 passes through the second heat exchanger 16 and is heated, and the exhaust gas 3 is heated to a temperature required for processing by the VOC removal device 19. Increase in temperature.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the heat medium 22 that has absorbed this heat is the second heat exchanger 16 of the heating means.
- the exhaust gas 3 before being processed by the VOC removal device 19 can be heated.
- the exhaust gas 3 can be heated to a temperature at which the VOC removal device 19 can reliably remove the VOC.
- the exhaust gas treatment system A and an exhaust gas processing method of the embodiment with respect to the exhaust gas 3 of large capacity generated from power generation equipment, it is possible to recover the CO 2 at a CO 2 recovery apparatus 1, the CO 2 It is possible to raise the temperature of the exhaust gas 3 whose temperature has been lowered after the CO 2 is recovered by the recovery device 1 to a temperature at which the VOC can be decomposed / adsorbed by the catalyst and removed.
- the exhaust gas 3 that has released heat through the first heat exchanger 12 is still in a high temperature state, and the exhaust gas 3 is sent to the second exhaust heat recovery boiler 35 to generate water vapor 36.
- the exhaust gas 3 is low temperature, sent to the CO 2 recovering apparatus 1, with respect to the exhaust gas 3 of large capacity generated from the gas turbine 34 of the power plant, and recovering the CO 2 efficiently in the CO 2 recovery apparatus 1 Can do.
- the water vapor 36 generated in the second exhaust heat recovery boiler 35 is sent to the regeneration tower 7 of the CO 2 recovery apparatus 1, and the CO 2 absorbent 6 is heated using this water vapor 36.
- the water vapor 36 can be generated by the heat recovered from the exhaust gas 3 by the second exhaust heat recovery boiler 35, and the CO 2 recovery device 1 can be used to recover CO 2 from the exhaust gas 3. it can.
- the exhaust gas 3 after the temperature is raised by the heating means of the second heat exchanger 16 and the VOC is decomposed / adsorbed by the VOC removal device 19 is the cooling means. It is sent to the first exhaust heat recovery boiler 30. Then, the steam 31 is generated by the first exhaust heat recovery boiler 30 using the heat of the high temperature exhaust gas 3. Thus, the water vapor 31 generated in the first exhaust heat recovery boiler 30 is also sent to the regeneration tower 7 of the CO 2 recovery device 1, and the CO 2 absorbent 6 is heated using this water vapor 31. Thus, the steam 31 can be generated by the heat recovered from the exhaust gas 3 also by the first exhaust heat recovery boiler 30, and the CO 2 is recovered from the exhaust gas 3 by using the steam 31 in the CO 2 recovery device 1. Can do.
- FIG. 7 relates to an exhaust gas treatment system for treating exhaust gas discharged from a gas turbine of a power generation facility, as in the fifth and sixth embodiments. Therefore, the same components as those in the fifth embodiment and the sixth embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the power generation facility includes a power generation gas turbine 34 that is driven by burning fossil fuel such as petroleum or LNG.
- the exhaust gas treatment system A of the present embodiment includes a second exhaust heat recovery boiler 35, a first heat exchanger 12, a CO 2 recovery device 1, a second heat exchanger 16, and a duct firing device 17. , A fourth heat exchanger 18, a VOC removal device 19, and a third heat exchanger 20.
- the exhaust gas 3 from the gas turbine 34 is sent to the second exhaust heat recovery boiler 35 to generate water vapor 36. Further, the exhaust gas 3 whose temperature has been lowered by the second exhaust heat recovery boiler 35 passes through the first heat exchanger 12, and heat is absorbed by the first heat exchanger 12. Thus, the exhaust gas 3 is low temperature, sent to the CO 2 recovering apparatus 1, with respect to the exhaust gas 3 of large capacity generated from the gas turbine 34 of the power plant, and recovering the CO 2 efficiently in the CO 2 recovery apparatus 1 Can do.
- the water vapor 36 generated in the second exhaust heat recovery boiler 35 is sent to the regeneration tower 7 of the CO 2 recovery device 1 to heat the CO 2 absorbent 6.
- CO 2 can be recovered from the exhaust gas 3 by using the steam 36 generated by the heat recovered from the exhaust gas 3 by the second exhaust heat recovery boiler 35 in the CO 2 recovery device 1.
- the low-temperature exhaust gas 3 after CO 2 is recovered by the CO 2 recovery device 1 passes through the second heat exchanger 16, and the heat absorbed by the first heat exchanger 12 is received by the second heat exchanger 16.
- the exhaust gas 3 discharged and passed through the CO 2 recovery device 1 is heated. Further, it is heated to a higher temperature by the duct firing device 17. Further, before the exhaust gas 3 is discharged from the chimney 21, the heat of the exhaust gas 3 is absorbed by the third heat exchanger 20, and the heat medium 27 that has absorbed this heat is sent to the fourth heat exchanger 18, and the VOC removal device
- the exhaust gas 3 before being treated at 19 is further heated by the fourth heat exchanger 18.
- the low-temperature exhaust gas 3 after being treated by the CO 2 recovery device 1 is heated before being supplied to the VOC removal device 19, and is heated to 200 to 300 ° C. or higher, and the exhaust gas 3 is catalytically reacted by the VOC removal device 19. 3 VOC can be reliably removed and reduced.
- the second heat exchanger 16, the duct firing device 17, by the heating means of the fourth heat exchanger 18, the CO 2 in the CO 2 recovering apparatus 1 In order to efficiently recover the exhaust gas 3, the temperature of the exhaust gas 3 can be increased to a temperature at which VOC can be decomposed / adsorbed with a catalyst. With respect to the large-capacity exhaust gas 3 generated from the gas turbine 34 of the power generation facility, In addition to removing CO 2 , VOC can be decomposed / adsorbed with a catalyst and removed.
- the water vapor 36 generated by the second exhaust heat recovery boiler 35 is sent to the regeneration tower 7 of the CO 2 recovery apparatus 1 to heat the CO 2 absorbent 6.
- CO 2 can be recovered from the exhaust gas 3 by using the steam 36 generated by the heat recovered from the exhaust gas 3 by the second exhaust heat recovery boiler 35 in the CO 2 recovery device 1. Therefore, it is not necessary to separately generate water vapor with an auxiliary boiler or the like in the CO 2 recovery apparatus 1 or the consumption of water vapor can be reduced, and CO 2 and VOC can be reliably removed from the exhaust gas 3.
- the running cost of the exhaust gas treatment system A can be reduced.
- the low-temperature exhaust gas 3 that has been treated by the CO 2 recovery device 1 is heated before being supplied to the VOC removal device 19 by the duct firing device 17. However, it becomes possible to increase the temperature.
- CO 2 can be recovered by the CO 2 recovery device 1 with respect to the large-capacity exhaust gas 3 generated from the power generation facility, and the low-temperature exhaust gas after CO 2 is recovered by the CO 2 recovery device 1 3 can be heated to a temperature at which VOC can be decomposed / adsorbed and removed by the catalyst, and VOC can also be reliably removed and reduced by the catalytic reaction of the VOC removal device 19.
- the third heat exchange is further performed. Since the heat of the exhaust gas 3 is absorbed by the vessel 20 and the exhaust gas 3 before being fed to the VOC removal device 19 by the fourth heat exchanger 18 can be heated, the heating by the duct firing device 17 is reduced and optimal The exhaust gas 3 can be heated to a high temperature. As a result, fuel such as natural gas required for heating the exhaust gas 3 by the duct firing device 17 can be reduced, and the running cost can be reduced.
- FIG. 1 An exhaust gas treatment system and an exhaust gas treatment method according to an eighth embodiment of the present invention will be described with reference to FIG.
- This embodiment relates to an exhaust gas treatment system for treating exhaust gas discharged from a gas turbine of a power generation facility, as in the fifth to seventh embodiments. Therefore, the same components as those in the fifth to seventh embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
- the power generation facility includes a power generation gas turbine 34 that is driven by burning fossil fuel such as petroleum or LNG.
- the exhaust gas treatment system A of the present embodiment includes a second exhaust heat recovery boiler 35, a first heat exchanger 12, a CO 2 recovery device 1, a second heat exchanger 16, and a duct firing device 17.
- the VOC removal device 19 and the first exhaust heat recovery boiler 30 are provided.
- the exhaust gas 3 from the gas turbine 34 is sent to the second exhaust heat recovery boiler 35 to generate water vapor 36. Further, the exhaust gas 3 whose temperature has been lowered by the second exhaust heat recovery boiler 35 passes through the first heat exchanger 12, and heat is absorbed by the first heat exchanger 12. Thus, the exhaust gas 3 is low temperature, sent to the CO 2 recovering apparatus 1, with respect to the exhaust gas 3 of large capacity generated from the gas turbine 34 of the power plant, and recovering the CO 2 efficiently in the CO 2 recovery apparatus 1 Can do.
- the water vapor 36 generated in the second exhaust heat recovery boiler 35 is sent to the regeneration tower 7 of the CO 2 recovery apparatus 1, and the CO 2 absorbent 6 is heated using this water vapor 36.
- CO 2 can be recovered from the exhaust gas 3 by using the steam 36 generated by the second exhaust heat recovery boiler 35 in the CO 2 recovery device 1.
- the low-temperature exhaust gas 3 after CO 2 is recovered by the CO 2 recovery device 1 passes through the second heat exchanger 16, and the heat absorbed by the first heat exchanger 12 is received by the second heat exchanger 16.
- the exhaust gas 3 discharged and passed through the CO 2 recovery device 1 is heated. Further, it is heated to a higher temperature by the duct firing device 17.
- the low-temperature exhaust gas 3 that has been treated by the CO 2 recovery device 1 is heated before being supplied to the VOC removal device 19 and is heated to a high temperature. It can be removed and reduced.
- the exhaust gas 3 after the VOC is decomposed / adsorbed and removed by the VOC removal device 19 is sent to the first exhaust heat recovery boiler 30.
- the steam 31 is generated by the first exhaust heat recovery boiler 30 using the heat of the high temperature exhaust gas 3.
- the water vapor 31 generated in the first exhaust heat recovery boiler 30 is sent to the regeneration tower 7 of the CO 2 recovery device 1, and the CO 2 absorbent 6 is heated using this water vapor 31.
- the CO 2 can be recovered from the exhaust gas 3 by using the steam 31 generated by the first exhaust heat recovery boiler 30 in the CO 2 recovery device 1.
- the exhaust gas 3 was low temperature to recover the CO 2 efficiently in the CO 2 recovery device 1, capable of decomposition / adsorbent removed catalyst VOC
- the temperature can be increased to a temperature, and CO 2 can be removed from the large-capacity exhaust gas 3 generated from the gas turbine 34 of the power generation facility, and VOC can be decomposed / adsorbed with a catalyst and removed.
- the low-temperature exhaust gas 3 that has been treated by the CO 2 recovery device 1 is heated before being supplied to the VOC removal device 19 by the duct firing device 17. However, it becomes possible to increase the temperature.
- CO 2 can be recovered by the CO 2 recovery device 1 with respect to the large-capacity exhaust gas 3 generated from the power generation facility, and the low-temperature exhaust gas after CO 2 is recovered by the CO 2 recovery device 1 3 can be heated to a temperature at which VOC can be decomposed / adsorbed and removed by the catalyst, and VOC can also be reliably removed and reduced by the catalytic reaction of the VOC removal device 19.
- the steam 36 and 31 can be generated by the heat recovered from the exhaust gas 3 by the second exhaust heat recovery boiler 35 and the first exhaust heat recovery boiler 30, and the steam 36 and 31 are used in the CO 2 recovery device 1.
- CO 2 can be recovered from the exhaust gas 3. Therefore, it is not necessary to separately generate water vapor with an auxiliary boiler or the like in the CO 2 recovery apparatus 1 or the consumption of water vapor can be reduced, and CO 2 and VOC can be reliably removed from the exhaust gas 3.
- the running cost can be reduced.
- the heat of the exhaust gas 3 is recovered by the first exhaust heat recovery boiler 30 and cooled, so that the exhaust gas 3 having a reduced temperature can be discharged from the chimney 21. .
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the heat medium 22 that has absorbed this heat is sent to the second heat exchanger 16.
- the exhaust gas 3 before being processed by the VOC removing device 19 can be heated.
- the exhaust gas 3 can be heated to a temperature at which the VOC can be decomposed / adsorbed and removed by the catalyst between the CO 2 recovery device 1 and the VOC removal device 19.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the exhaust gas 3 before being fed to the VOC removal device 19 by the second heat exchanger 16 can be heated. It is possible to reduce the heating by 17 and to raise the temperature of the exhaust gas 3 to an optimum temperature. As a result, fuel such as natural gas required for heating the exhaust gas 3 by the duct firing device 17 can be reduced, and the running cost can be reduced.
- FIG. 1 An exhaust gas treatment system and an exhaust gas treatment method according to a ninth embodiment of the present invention will be described with reference to FIG.
- This embodiment relates to an exhaust gas treatment system for treating exhaust gas discharged from a gas turbine of a power generation facility, as in the fifth to eighth embodiments. Therefore, the same components as those in the fifth to eighth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
- the power generation facility includes a power generation gas turbine 34 that is driven by burning fossil fuel such as petroleum or LNG.
- the exhaust gas treatment system A of the present embodiment includes a second exhaust heat recovery boiler 35, a first heat exchanger 12, a CO 2 recovery device 1, a second heat exchanger 16, and a fourth heat exchanger 18. And a steam heating device 33, a VOC removal device 19, and a third heat exchanger 20.
- the exhaust gas 3 from the gas turbine 34 is sent to the second exhaust heat recovery boiler 35 to generate water vapor 36. Further, the exhaust gas 3 whose temperature has been lowered by the second exhaust heat recovery boiler 35 passes through the first heat exchanger 12, and heat is absorbed by the first heat exchanger 12. Thus, the exhaust gas 3 is low temperature, sent to the CO 2 recovering apparatus 1, with respect to the exhaust gas 3 of large capacity generated from the gas turbine 34 of the power plant, and recovering the CO 2 efficiently in the CO 2 recovery apparatus 1 Can do.
- the low-temperature exhaust gas 3 after CO 2 is recovered by the CO 2 recovery device 1 passes through the second heat exchanger 16, and the heat absorbed by the first heat exchanger 12 is used to change the CO 2 recovery device 1.
- the passed exhaust gas 3 is heated.
- the heat of the exhaust gas 3 is absorbed by the third heat exchanger 20, and the heat medium 27 that has absorbed this heat is sent to the fourth heat exchanger 18, and the VOC removal device
- the exhaust gas 3 before being treated at 19 is heated.
- the steam 36 generated by the second exhaust heat recovery boiler 35 is sent to the steam heater 33, and the exhaust gas 3 is heated by the steam heater 33 using the steam 36.
- the low-temperature exhaust gas 3 that has been treated by the CO 2 recovery device 1 is heated before being supplied to the VOC removal device 19 and is heated to a high temperature. It can be removed and reduced.
- the exhaust gas 3 was low temperature to recover the CO 2 efficiently in the CO 2 recovery device 1, capable of decomposition / adsorbent removed catalyst VOC
- the temperature can be increased to a temperature, and CO 2 can be removed from the large-capacity exhaust gas 3 generated from the gas turbine 34 of the power generation facility, and VOC can be decomposed / adsorbed with a catalyst and removed.
- the steam 36 generated in the second exhaust heat recovery boiler 35 before being supplied to the CO 2 recovery apparatus 1 is sent to the steam heating apparatus 33, and the exhaust gas 3 before being processed by the VOC removal apparatus 19 using this steam 36.
- the VOC of the exhaust gas 3 can be reliably removed and reduced by the catalytic reaction of the VOC removal device 19. Therefore, it is not necessary to burn the fuel separately with the steam heating device 33 to generate heat, and the running cost can be reduced.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12 and the exhaust gas 3 before being fed to the VOC removing device 19 can be heated by the second heat exchanger 16
- the third heat exchange is also possible. Since the heat of the exhaust gas 3 is absorbed by the vessel 20 and the exhaust gas 3 before being fed to the VOC removal device 19 by the fourth heat exchanger 18 can be heated, the running cost can be reduced from this point as well. become.
- the heat of the exhaust gas 3 is absorbed by the fourth heat exchanger 18, and the heat medium 27 that has absorbed this heat is sent to the fourth heat exchanger 18, and the VOC removal device
- the exhaust gas 3 before being treated at 19 can be heated.
- released from the chimney 21 can be collect
- the heat of the exhaust gas 3 is absorbed and cooled by the third heat exchanger 20 as described above, so that the low temperature exhaust gas 3 can be released from the chimney 21.
- the power generation facility of the present embodiment includes a power generation gas turbine 34 that is driven by burning fossil fuel such as petroleum or LNG.
- the exhaust gas treatment system A of the present embodiment includes a second exhaust heat recovery boiler 35, a first heat exchanger 12, a CO 2 recovery device 1, a second heat exchanger 16, a steam heating device 33, A VOC removal device 19 and a first exhaust heat recovery boiler 30 are provided.
- the exhaust gas 3 from the gas turbine 34 is sent to the second exhaust heat recovery boiler 35 to generate water vapor 36. Further, the exhaust gas 3 whose temperature has been lowered by the second exhaust heat recovery boiler 35 passes through the first heat exchanger 12, and heat is further absorbed by the first heat exchanger 12. Thus, the exhaust gas 3 is low temperature, sent to the CO 2 recovering apparatus 1, with respect to the exhaust gas 3 of large capacity generated from the gas turbine 34 of the power plant, and recovering the CO 2 efficiently in the CO 2 recovery apparatus 1 Can do.
- the steam 36 generated in the second exhaust heat recovery boiler 35 is sent to the steam heating device 33, and the exhaust gas 3 that has passed through the CO 2 recovery device 1 is heated by the steam heating device 33 using the steam 36. .
- the low-temperature exhaust gas 3 after CO 2 is recovered by the CO 2 recovery device 1 passes through the second heat exchanger 16 and the heat absorbed by the first heat exchanger 12 is used to change the CO 2 recovery device 1.
- the passed exhaust gas 3 is heated.
- the low-temperature exhaust gas 3 that has been treated by the CO 2 recovery device 1 is heated before being supplied to the VOC removal device 19 and is heated to a high temperature. It can be removed and reduced.
- the exhaust gas 3 after the VOC is decomposed / adsorbed and removed by the VOC removal device 19 is sent to the first exhaust heat recovery boiler 30.
- the steam 31 is generated by the first exhaust heat recovery boiler 30 using the heat of the high temperature exhaust gas 3.
- the water vapor 31 generated in the first exhaust heat recovery boiler 30 is sent to the regeneration tower 7 of the CO 2 recovery device 1, and the CO 2 absorbent 6 is heated using this water vapor 31.
- the water vapor 31 can be generated by the heat recovered from the exhaust gas 3 by the first exhaust heat recovery boiler 30, and CO 2 can be recovered from the exhaust gas 3 by using the water vapor 31 in the CO 2 recovery device 1. it can.
- the exhaust gas 3 was low temperature to recover the CO 2 efficiently in the CO 2 recovery device 1, capable of decomposition / adsorbent removed catalyst VOC
- the temperature can be increased to a temperature, and CO 2 can be removed from the large-capacity exhaust gas 3 generated from the gas turbine 34 of the power generation facility, and VOC can be decomposed / adsorbed with a catalyst and removed.
- the water vapor 36 generated in the second exhaust heat recovery boiler 35 is supplied to the steam heating device 33 before being supplied to the CO 2 recovery device 1, and this water vapor 36 It is possible to heat the exhaust gas 3 before being processed by the VOC removal device 19 using. As a result, the VOC of the exhaust gas 3 can be reliably removed and reduced by the catalytic reaction of the VOC removal device 19. Therefore, it is not necessary to burn the fuel separately with the steam heating device 33 to generate heat, and the running cost can be reduced. That is, the exhaust gas 3 can be treated efficiently, economically, and energy saving.
- the water vapor 31 generated by the first exhaust heat recovery boiler 30 is sent to the regeneration tower 7 of the CO 2 recovery device 1, and the water vapor 31 is used to produce CO 2.
- the absorption liquid 6 is heated.
- the water vapor 31 can be generated by the heat recovered from the exhaust gas 3 by the first exhaust heat recovery boiler 30, and CO 2 can be recovered from the exhaust gas 3 by using the water vapor 31 in the CO 2 recovery device 1. it can. Therefore, it is not necessary to separately generate water vapor with an auxiliary boiler or the like in the CO 2 recovery apparatus 1 or the consumption of water vapor can be reduced, and CO 2 and VOC can be reliably removed from the exhaust gas 3.
- the running cost can be reduced. Further, before the exhaust gas 3 is released from the chimney 21, the heat of the exhaust gas 3 is recovered by the first exhaust heat recovery boiler 30 and cooled, so that the exhaust gas 3 having a reduced temperature can be discharged from the chimney 21. .
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the heat medium 22 that has absorbed this heat is sent to the second heat exchanger 16.
- the exhaust gas 3 before being processed by the VOC removing device 19 can be heated.
- the exhaust gas 3 can be heated to a temperature at which the VOC can be decomposed / adsorbed and removed by the catalyst between the CO 2 recovery device 1 and the VOC removal device 19.
- the heat of the exhaust gas 3 is absorbed by the first heat exchanger 12, and the exhaust gas 3 before being fed to the VOC removal device 19 by the second heat exchanger 16 can be heated. Running costs can be reduced.
- the power generation facility of the present embodiment includes a power generation gas turbine 34 that is driven by burning fossil fuel such as petroleum or LNG.
- the exhaust gas treatment system A of the present embodiment is configured to include a duct firing device 17, a VOC removal device 19, and a first exhaust heat recovery boiler 30. Further, the exhaust gas treatment system A of the present embodiment removes the first exhaust heat recovery boiler 30 from the duct firing device 17 in the above order until the exhaust gas 3 discharged from the gas turbine 34 is released to the atmosphere by the chimney 21. It is equipped with.
- the CO 2 recovery apparatus 1 is provided separately for treating an exhaust gas 3 from the other boiler other power plant, treated in this CO 2 recovery apparatus 1
- the exhaust gas 3 is introduced between the duct firing device 17 and the VOC removal device 19 and mixed with the exhaust gas 3 from the gas turbine 34 for processing.
- the exhaust gas 3 from the gas turbine 34 is heated to a higher temperature by the duct firing device 17. Further, the exhaust gas 3 after being processed by the CO 2 recovery device 1 of another system is mixed with the exhaust gas 3 heated by the duct firing device 17 in this way. In this way, the exhaust gas 3 having been cooled after being treated by the CO 2 recovery device 1 is mixed with the exhaust gas 3 heated by the duct firing device 17 before being supplied to the VOC removal device 19.
- the temperature of the exhaust gas 3 is 200 to 300 ° C. or higher. As a result, the VOC of the exhaust gas 3 can be reliably removed and reduced by the catalytic reaction of the VOC removal device 19.
- the heat of the exhaust gas 3 is recovered by the first exhaust heat recovery boiler 30 and cooled, whereby the exhaust gas 3 having a reduced temperature is released from the chimney 21.
- the exhaust gas 3 was low temperature to recover the CO 2 efficiently in the CO 2 recovery apparatus 1 separately provided, with a duct firing device 17 by mixing by introducing the exhaust gas 3 from the heated gas turbine 34, VOC and can be high temperature to a temperature capable of decomposing / adsorbing and removing the catalyst, CO in the exhaust gas 3 by another CO 2 recovering apparatus 1 2 and the large-capacity exhaust gas 3 generated from the gas turbine 34 of the power generation facility and the VOC in the exhaust gas 3 can be decomposed / adsorbed by the catalyst and removed.
- the heat of the exhaust gas 3 is recovered by the first exhaust heat recovery boiler 30 and cooled, so that the exhaust gas 3 having a reduced temperature can be discharged from the chimney 21. .
- the power generation facility of the present embodiment is, for example, a combined cycle power generation facility in which a gas turbine 34 and a steam turbine are combined.
- the first exhaust gas treatment system 40 for treating the exhaust gas 3 from the power generation gas turbine 34 driven by burning fossil fuel such as LNG and the second exhaust gas treatment system 41 for treating the exhaust gas 3 from the boiler or the like are combined. Configured.
- the first exhaust gas treatment system 40 for treating the exhaust gas 3 from the gas turbine 34 and the duct firing device 17 and the first heat exchange until the exhaust gas 3 discharged from the gas turbine 34 is released to the atmosphere by the chimney 21. And a third exhaust heat recovery boiler 42 in this order.
- the second exhaust gas treatment system 41 for treating the exhaust gas 3 from the boiler or the like performs the second heat exchange with the CO 2 recovery device 1 until the exhaust gas 3 discharged from the boiler or the like is released to the atmosphere by the chimney 21.
- the VOC removal device 19 and the fourth exhaust heat recovery boiler 43 are provided in this order.
- the exhaust gas 3 from the gas turbine 34 is heated by the duct firing device 17, and this heat is recovered by the first heat exchanger 12 and steam is generated by the third exhaust heat recovery boiler 42. The temperature is lowered and discharged from the chimney 21.
- the CO 2 is recovered from the exhaust gas 3 discharged from a boiler or the like by the CO 2 recovering apparatus 1, and low temperature due to this
- the exhaust gas 3 is heated by the second heat exchanger 16.
- the heat medium 22 is transferred between the first heat exchanger 12 that recovers the heat heated by the duct firing device 17 of the first exhaust gas treatment system 40 and the second heat exchanger 16 of the second exhaust gas treatment system 41.
- the exhaust gas 3 before being processed by the VOC removing device 19 is heated by the heat recovered by the first exhaust gas processing system 40.
- the low-temperature exhaust gas 3 after being treated by the CO 2 recovery device 1 is heated before being supplied to the VOC removal device 19, and the VOC of the exhaust gas 3 is reliably removed and reduced by the catalytic reaction of the VOC removal device 19. It becomes possible.
- the exhaust gas 3 after the VOC is removed by the VOC removal device 19 of the second exhaust gas treatment system 41 is processed by the fourth exhaust heat recovery boiler 43 to generate water vapor 44 and the exhaust gas 3 is cooled. Then, water vapor 44 generated in the fourth exhaust heat recovery boiler 43 is supplied to the CO 2 recovering apparatus 1, used for the recovery of CO 2 from the exhaust gas 3. In addition, the exhaust gas 3 which has been processed by the fourth exhaust heat recovery boiler 43 and lowered in temperature is emitted from the chimney 21 to the atmosphere.
- the exhaust gas 3 from the gas turbine 34 of another system is heated by the duct firing device 17, and this heat is recovered and utilized to obtain the CO 2 recovery device 1.
- the exhaust gas 3 after being treated with is heated.
- CO 2 can be recovered by the CO 2 recovery device 1 with respect to the large-capacity exhaust gas 3 generated from the power generation facility, and the low-temperature exhaust gas after CO 2 is recovered by the CO 2 recovery device 1 3 can be heated to a temperature at which VOC can be decomposed / adsorbed and removed by the catalyst, and VOC can also be reliably removed and reduced by the catalytic reaction of the VOC removal device.
- the absorption liquid 6 is heated.
- the water vapor 44 can be generated by the heat recovered from the exhaust gas 3 by the fourth exhaust heat recovery boiler 43, and the CO 2 recovery device 1 can be used to recover CO 2 from the exhaust gas 3. it can. Therefore, it is not necessary to separately generate water vapor with an auxiliary boiler or the like in the CO 2 recovery apparatus 1 or the consumption of water vapor can be reduced, and CO 2 and VOC can be reliably removed from the exhaust gas 3. At the same time, the running cost can be reduced.
- the exhaust gas 3 can be treated efficiently, economically, and energy saving.
- the heat of the exhaust gas 3 is recovered by the third exhaust heat recovery boiler 42 and the fourth exhaust heat recovery boiler 43 and cooled to reduce the temperature of the exhaust gas 3 from the chimney 21. Can be released.
- the power generation facility of the present embodiment is, for example, a combined cycle type power generation facility that combines a gas turbine 34 and a steam turbine.
- the exhaust gas treatment system A of the present embodiment includes: As shown in FIG. 13, the first exhaust gas treatment system 40 for treating the exhaust gas 3 from the gas turbine 34 for power generation that is driven by burning fossil fuel such as oil and LNG, and the exhaust gas 3 from the boiler or the like are treated.
- the second exhaust gas treatment system 41 is combined.
- the first exhaust gas treatment system 40 that treats the exhaust gas 3 from the gas turbine 34 according to the present embodiment until the exhaust gas 3 exhausted from the gas turbine 34 is released to the atmosphere by the chimney 21 is used.
- a third exhaust heat recovery boiler 42 in this order.
- the second exhaust gas treatment system 41 for treating an exhaust gas 3 from the boiler or the like, between the exhaust gas 3 discharged from a boiler or the like to be released into the atmosphere in stack 21, the CO 2 recovering apparatus 1, the first heat exchanger 12 And the steam heating device 33, the VOC removal device 19, and the second heat exchanger 16 are provided in this order.
- the exhaust gas 3 from the gas turbine 34 is heated by the duct firing device 17, steam is generated by the third exhaust heat recovery boiler 42 with this heat, the temperature is lowered, and the exhaust gas is discharged from the chimney 21. .
- the CO 2 is recovered from the exhaust gas 3 discharged from a boiler or the like by the CO 2 recovering apparatus 1, and low temperature due to this
- the exhaust gas 3 is heated by the first heat exchanger 12.
- the heat medium 22 circulates between the second heat exchanger 16 that absorbs the heat of the exhaust gas 3 that has been processed by the VOC removal device 19, whereby the first heat exchanger 12 causes the VOC removal device 19 to circulate.
- the exhaust gas 3 before processing is heated.
- the exhaust gas 3 that has passed through the first heat exchanger 12 is heated by the steam heating device 33.
- the exhaust gas 3 from the gas turbine 34 of the first exhaust gas treatment system 40 is heated by the duct firing device 17, and the steam 45 generated in the third exhaust heat recovery boiler 42 is supplied to the steam heater 33 by this heat.
- the exhaust gas 3 of the second exhaust gas treatment system 41 is heated by the heat of the water vapor 45.
- the low-temperature exhaust gas 3 after being treated by the CO 2 recovery device 1 is heated before being supplied to the VOC removal device 19, and the VOC of the exhaust gas 3 is reliably removed and reduced by the catalytic reaction of the VOC removal device 19. It becomes possible.
- the exhaust gas 3 after the VOC is removed by the VOC removal device 19 of the second exhaust gas treatment system 41 as described above is subjected to heat radiation treatment by the second heat exchanger 16 to be cooled, and released from the chimney 21 to the atmosphere.
- the exhaust gas 3 from the gas turbine 34 of another system is heated by the duct firing device 17 and this heat is recovered by the third exhaust heat recovery boiler 42.
- the exhaust gas 3 processed at the CO 2 recovery device 1 and lowered in temperature is heated to a temperature at which VOC can be decomposed / adsorbed and removed by the catalyst.
- the VOC in the exhaust gas 3 is removed by decomposition / adsorbent with the catalyst together with the exhaust gas 3 of large capacity generated from the gas turbine 34 of the power plant It becomes possible.
- the heat of the exhaust gas 3 is absorbed by the second heat exchanger 16, and the heat medium 22 that has absorbed this heat is sent to the first heat exchanger 12, and the VOC removal device
- the exhaust gas 3 before being treated at 19 can be heated.
- released from the chimney 21 can be collect
- the heat of the exhaust gas 3 is absorbed and cooled by the second heat exchanger 16 as described above, so that the low temperature exhaust gas 3 can be released from the chimney 21.
- this invention is not limited to said 1st thru
- the exhaust gas whose temperature has been lowered after CO 2 is recovered by the CO 2 recovery device can be increased to a temperature at which VOC can be decomposed (or adsorbed) with a catalyst and removed. It is possible to recover and remove CO 2 from a large-capacity exhaust gas generated in a power generation facility such as a thermal power plant with a CO 2 recovery device and to reliably remove VOC by a catalytic reaction of the VOC removal device. .
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Abstract
Description
本願は、2013年2月22日に、米国に出願された米国特許出願第13/774,442号に基づき優先権を主張し、その内容をここに援用する。
以下、図1を参照し、本発明の第1実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。ここで、本実施形態に係る排ガス処理システムは、火力発電所などの発電設備から排出される排ガスを処理するための排ガス処理システムであるものとして説明を行う。
次に、図2を参照し、本発明の第2実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第1実施形態の排ガス処理システムと同様、火力発電所などの発電設備のボイラから排出される排ガスを処理するための排ガス処理システムに関するものである。よって、第1実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図3を参照し、本発明の第3実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第1実施形態、第2実施形態の排ガス処理システムと同様、火力発電所などの発電設備のボイラから排出される排ガスを処理するための排ガス処理システムに関するものである。よって、第1実施形態、第2実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図4を参照し、本発明の第4実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第1から第3実施形態の排ガス処理システムと同様、火力発電所などの発電設備のボイラから排出される排ガスを処理するための排ガス処理システムに関するものである。よって、第1から第3実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図5を参照し、本発明の第5実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第1から第4実施形態のようにボイラではなく、発電設備のガスタービンから排出される排ガスを処理するための排ガス処理システムに関するものである。但し、第1から第4実施形態と同様の他の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図6を参照し、本発明の第6実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第5実施形態と同様、発電設備のガスタービンから排出される排ガスを処理するための排ガス処理システムに関するものである。よって、第5実施形態と同様の構成、及び第1から第4実施形態と同様の他の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図7を参照し、本発明の第7実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第5実施形態、第6実施形態と同様、発電設備のガスタービンから排出される排ガスを処理するための排ガス処理システムに関するものである。よって、第5実施形態、第6実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図8を参照し、本発明の第8実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第5から第7実施形態と同様、発電設備のガスタービンから排出される排ガスを処理するための排ガス処理システムに関するものである。よって、第5から第7実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図9を参照し、本発明の第9実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第5から第8実施形態と同様、発電設備のガスタービンから排出される排ガスを処理するための排ガス処理システムに関するものである。よって、第5から第8実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図10を参照し、本発明の第10実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。本実施形態は、第5から第9実施形態と同様、発電設備のガスタービンから排出される排ガスを処理するための排ガス処理システムに関するものである。よって、第5から第9実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図11を参照し、本発明の第11実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。なお、第1から第10実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図12を参照し、本発明の第12実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。なお、第1から第11実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
次に、図13を参照し、本発明の第13実施形態に係る排ガス処理システム及び排ガス処理方法について説明する。なお、第1から第12実施形態と同様の構成に対しては同一符号を付し、その詳細な説明を省略する。
2 脱硫冷却装置
3 排ガス
4 CO2吸収液(リーン液)
5 吸収塔
6 CO2吸収液(リッチ液)
7 再生塔
8 圧縮機
10 ボイラ
11 エアヒータ
12 第1熱交換器
13 電気集塵装置
14 送風機
15 湿式スクラバー
16 第2熱交換器(加熱手段)
17 ダクトファイアリング装置(加熱手段)
18 第4熱交換器(加熱手段)
19 VOC除去装置
20 第3熱交換器(冷却手段)
21 煙突
22 熱媒体
23 吸収液スクラバー
24 送液ポンプ
25 返送ポンプ
26 冷却器
27 熱媒体
30 第1排熱回収ボイラ(冷却手段)
31 水蒸気
32 水蒸気
33 水蒸気加熱装置(加熱手段)
34 ガスタービン
35 第2排熱回収ボイラ
36 水蒸気
40 第1排ガス処理系統
41 第2排ガス処理系統
42 第3排熱回収ボイラ(冷却手段)
43 第4排熱回収ボイラ(冷却手段)
44 水蒸気
45 水蒸気
A 排ガス処理システム
Claims (10)
- ボイラ又はタービンから排出された排ガスからCO2を回収するCO2回収装置と、該CO2回収装置で処理した後の排ガスからVOCを除去するVOC除去装置とを備えた排ガス処理システムであって、
前記CO2回収装置で処理した後で、且つ前記VOC除去装置で処理する前の排ガスを加熱する加熱手段と、
前記VOC除去装置で処理した後の排ガスを冷却する冷却手段とを備えている排ガス処理システム。 - 請求項1に記載の排ガス処理システムにおいて、
前記加熱手段が、バーナで形成した火炎によって、ダクト内を流通する前記CO2回収装置で処理した後の排ガスを加熱するダクトファイアリング装置を備えている排ガス処理システム。 - 請求項1に記載の排ガス処理システムにおいて、
前記ボイラ又は前記タービンと前記CO2回収装置の間に、排ガスの熱を熱媒体に吸収させる第1熱交換器が設けられており、
前記加熱手段が、前記第1熱交換器から給送された熱媒体から熱を放出させて前記CO2回収装置で処理した後の排ガスを加熱する第2熱交換器を備えている排ガス処理システム。 - 請求項1に記載の排ガス処理システムにおいて、
前記冷却手段が、前記VOC除去装置で処理した後の排ガスの熱を熱媒体に吸収させる第3熱交換器を備え、
前記加熱手段が、前記第3熱交換器から給送された前記熱媒体から熱を放出させて前記CO2回収装置で処理した後の排ガスを加熱する第4熱交換器を備えている排ガス処理システム。 - 請求項1に記載の排ガス処理システムにおいて、
前記CO2回収装置が、ボイラ又はタービンから排出された排ガスにCO2吸収液を接触させ、排ガスからCO2を吸収して除去する吸収塔と、
水蒸気を用いて前記吸収塔でCO2を吸収した前記CO2吸収液を加熱し、該CO2吸収液からCO2を放出させて回収しつつ前記CO2吸収液を再生させる再生塔とを備えて構成されており、
前記冷却手段が、前記VOC除去装置で処理した後の排ガスの熱で水蒸気を生成する第1排熱回収ボイラを備え、
前記CO2回収装置の再生塔のCO2吸収液を加熱する水蒸気が前記第1排熱回収ボイラで生成した水蒸気である排ガス処理システム。 - 請求項1に記載の排ガス処理システムにおいて、
前記加熱手段が、前記CO2回収装置で処理した後の排ガスを水蒸気で加熱する水蒸気加熱装置を備え、
前記水蒸気加熱装置で排ガスを加熱する水蒸気が前記ボイラで生成した水蒸気である排ガス処理システム。 - 請求項1に記載の排ガス処理システムにおいて、
前記ボイラ又は前記タービンと前記CO2回収装置の間に、排ガスの熱で水蒸気を生成する第2排熱回収ボイラが設けられており、
前記CO2回収装置の再生塔のCO2吸収液を加熱する水蒸気、及び/又は前記CO2回収装置で処理した後の排ガスを加熱する前記水蒸気加熱装置の水蒸気が、前記第2排熱回収ボイラで生成した水蒸気である排ガス処理システム。 - 請求項1に記載の排ガス処理システムにおいて、
他のボイラ又は他のタービンから排出された排ガスの熱を熱媒体に吸収させる第5熱交換器が設けられ、
前記加熱手段が、前記第5熱交換器から給送された熱媒体から熱を放出させて前記CO2回収装置で処理した後の排ガスを加熱する第6熱交換器を備えている排ガス処理システム。 - 請求項1に記載の排ガス処理システムにおいて、
他のボイラ又は他のタービンから排出された排ガスの熱で水蒸気を生成する第3排熱回収ボイラが設けられ、
前記加熱手段が、前記CO2回収装置で処理した後の排ガスを水蒸気で加熱する水蒸気加熱装置を備え、
前記水蒸気加熱装置で排ガスを加熱する水蒸気が前記第3排熱回収ボイラで生成した水蒸気である排ガス処理システム。 - CO2回収装置によってボイラ又はタービンから排出された排ガスからCO2を回収し、VOC除去装置によって前記CO2回収装置で処理した後の排ガスからVOCを除去する排ガス処理方法において、
前記CO2回収装置で処理した後で、且つ前記VOC除去装置で処理する前の排ガスを加熱手段で加熱し、
前記VOC除去装置で処理した後の排ガスを冷却手段で冷却するようにしたことを特徴とする排ガス処理方法。
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