WO2019162992A1 - 排ガス処理装置及び排ガス処理方法 - Google Patents
排ガス処理装置及び排ガス処理方法 Download PDFInfo
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- WO2019162992A1 WO2019162992A1 PCT/JP2018/005945 JP2018005945W WO2019162992A1 WO 2019162992 A1 WO2019162992 A1 WO 2019162992A1 JP 2018005945 W JP2018005945 W JP 2018005945W WO 2019162992 A1 WO2019162992 A1 WO 2019162992A1
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- Prior art keywords
- exhaust gas
- integrated
- combustion exhaust
- power generation
- combustion
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- 238000003672 processing method Methods 0.000 title 1
- 239000007789 gas Substances 0.000 claims abstract description 669
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 576
- 238000010248 power generation Methods 0.000 claims abstract description 188
- 238000011084 recovery Methods 0.000 claims abstract description 158
- 239000003546 flue gas Substances 0.000 claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000002485 combustion reaction Methods 0.000 claims description 319
- 239000003638 chemical reducing agent Substances 0.000 claims description 33
- 230000006835 compression Effects 0.000 claims description 30
- 238000007906 compression Methods 0.000 claims description 30
- 239000000446 fuel Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 11
- 239000003054 catalyst Substances 0.000 claims description 9
- 239000002918 waste heat Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 32
- 239000002250 absorbent Substances 0.000 description 21
- 230000002745 absorbent Effects 0.000 description 21
- 230000007423 decrease Effects 0.000 description 18
- 238000000354 decomposition reaction Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 12
- 230000009467 reduction Effects 0.000 description 12
- 238000006722 reduction reaction Methods 0.000 description 12
- 238000009825 accumulation Methods 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 7
- 238000011069 regeneration method Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to an exhaust gas treatment apparatus and an exhaust gas treatment method, for example, an exhaust gas treatment apparatus and an exhaust gas treatment method for treating combustion exhaust gas discharged from a power generation facility.
- an exhaust gas treatment apparatus including a plurality of exhaust gas flow paths including an exhaust heat recovery boiler that is connected to each of a plurality of gas turbines and recovers exhaust heat of combustion exhaust gas discharged from the gas turbine (for example, Patent Document 1).
- the exhaust heat from the combustion exhaust gas discharged from each gas turbine is recovered by an exhaust heat recovery boiler provided in each exhaust gas passage.
- the flue gas in each flue gas passage from which the exhaust heat is recovered is integrated into an integrated flue gas, and then the carbon dioxide (CO 2 ) in the integrated flue gas is converted into a CO 2 absorbent by the CO 2 recovery device. Is recovered by.
- nitrogen oxides contained in the combustion exhaust gas e.g., nitrogen dioxide (NO 2)
- NO 2 nitrogen dioxide
- a nitrogen oxide removing device for removing nitrogen oxide in the exhaust gas is provided.
- the gas turbine is in a low power generation load state during operation, the emission amount of nitrogen oxides in the combustion exhaust gas significantly increases. Even if a nitrogen oxide removal device is provided in front of the CO 2 recovery device, the combustion exhaust gas The nitrogen oxides in the inside may not always be sufficiently removed.
- the nitrogen oxides remaining in the flue gas, reclaiming the storage component due to nitrogen oxides accumulate in the CO 2 absorbing solution for CO 2 recovery apparatus, to remove accumulated components due to nitrogen oxides from the CO 2 absorbing solution
- the frequency of processing may increase and the operating cost may increase.
- An object of the present invention is to provide an exhaust gas treatment apparatus and an exhaust gas treatment method that can reduce the amount of nitrogen oxide-derived components accumulated in a CO 2 absorbent and reduce the operating cost.
- the exhaust gas treatment apparatus of the present invention includes a first exhaust gas passage through which the first combustion exhaust gas discharged from the first power generation facility flows, a second exhaust gas passage through which the second combustion exhaust gas discharged from the second power generation facility flows, The first combustion exhaust gas flowing from the first exhaust gas flow channel and the first combustion exhaust gas channel, which is branched from at least one of the first exhaust gas flow channel and the second exhaust gas flow channel and flows through the first exhaust gas flow channel.
- a nitrogen oxide removing unit that removes nitrogen oxide in the combustion exhaust gas
- an integrated exhaust heat recovery unit that collects exhaust heat of the integrated combustion exhaust gas from which nitrogen oxide has been removed by the nitrogen oxide removing unit
- heat Waste heat in yield portion is characterized by comprising a CO 2 recovery unit for recovering by a CO 2 CO 2 recovery liquid in the integrated flue gas recovered.
- the exhaust gas treatment apparatus can adjust the concentration of nitrogen oxides in the integrated combustion exhaust gas introduced into the nitrogen oxide removing unit to a concentration range suitable for the decomposition treatment of nitrogen oxides. It becomes possible to efficiently decompose and remove the nitrogen oxides therein. Therefore, it is possible to realize an exhaust gas treatment apparatus that can reduce the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent and reduce the operating cost.
- the exhaust gas treatment apparatus of the present invention preferably includes an exhaust exhaust heat recovery section that recovers exhaust heat of exhaust combustion exhaust gas flowing through the exhaust gas exhaust passage.
- the exhaust gas treatment device can recover the exhaust heat of the combustion exhaust gas flowing through at least one of the first exhaust gas channel and the second exhaust gas channel in the exhaust exhaust heat recovery unit. 2 It becomes possible to effectively utilize the exhaust heat of the combustion exhaust gas.
- the exhaust gas treatment apparatus controls the flow rates of the first combustion exhaust gas and the second combustion exhaust gas introduced into the integrated exhaust heat recovery unit, thereby reducing the power generation load of the first power generation facility and the second power generation facility. Since at least a part of the first combustion exhaust gas and the second combustion exhaust gas discharged from at least one can be discharged to the outside, the concentration of nitrogen oxide in the integrated combustion exhaust gas introduced into the nitrogen oxide removal unit It can be easily adjusted to a concentration range suitable for the decomposition treatment.
- the control unit is configured to introduce the first combustion exhaust gas and the second exhaust gas to be introduced into the integrated exhaust heat recovery unit based on power generation loads of the first power generation facility and the second power generation facility. It is preferable to control the flow rate of the combustion exhaust gas.
- the exhaust gas treatment apparatus can discharge at least a part of the first combustion exhaust gas and the second combustion exhaust gas discharged from at least one of the first power generation facility and the second power generation facility whose power generation load is reduced,
- the concentration of nitrogen oxides in the integrated combustion exhaust gas introduced into the nitrogen oxide removing section can be easily adjusted to a concentration range suitable for the nitrogen oxide decomposition treatment.
- the control unit introduces the first combustion introduced into the integrated exhaust heat recovery unit based on the power generation outputs of the first power generation facility and the second power generation facility as the power generation load. It is preferable to control the flow rates of the exhaust gas and the second combustion exhaust gas.
- the exhaust gas treatment apparatus can discharge at least a part of the first combustion exhaust gas and the second combustion exhaust gas discharged from at least one of the first power generation facility and the second power generation facility whose power generation output is reduced,
- the concentration of nitrogen oxides in the integrated combustion exhaust gas introduced into the nitrogen oxide removing section can be easily adjusted to a concentration range suitable for the nitrogen oxide decomposition treatment.
- the control unit as the power generation load, has a flow rate of the first combustion exhaust gas flowing through the first exhaust gas flow channel, and a flow rate of the second combustion exhaust gas flowing through the second exhaust gas flow channel.
- the flow rates of the first combustion exhaust gas and the second combustion exhaust gas introduced into the integrated exhaust heat recovery unit are controlled based on at least one of the flow rates of the exhaust combustion exhaust gas flowing through the exhaust gas exhaust passage.
- the exhaust gas treatment apparatus is capable of at least one of the first combustion exhaust gas and the second combustion exhaust gas discharged from at least one of the first power generation facility and the second power generation facility in which the flow rates of the first combustion exhaust gas and the second combustion exhaust gas are reduced. Since a part can be discharged to the outside, the concentration of nitrogen oxide in the integrated combustion exhaust gas introduced into the nitrogen oxide removing unit can be easily adjusted to a concentration range suitable for the decomposition treatment of nitrogen oxide.
- the control unit when the power generation load becomes a predetermined threshold value or less, based on the exhaust gas load calculated based on the following formula (1), the integrated exhaust heat recovery. It is preferable to control the flow rates of the first combustion exhaust gas and the second combustion exhaust gas introduced into the section. With this configuration, the exhaust gas treatment device controls the flow rates of the first combustion exhaust gas and the second combustion exhaust gas to be introduced into the integrated exhaust heat recovery unit based on the exhaust gas load.
- At least part of the first combustion exhaust gas and the second combustion exhaust gas discharged from at least one of the second power generation facilities can be discharged to the outside, and the concentration of nitrogen oxides in the integrated combustion exhaust gas introduced into the nitrogen oxide removal unit It can be easily adjusted to a concentration range suitable for nitrogen oxide decomposition treatment.
- Exhaust gas load (%) the flow rate of the first combustion exhaust gas or the second combustion exhaust gas flowing through the first exhaust gas channel or the second exhaust gas channel to be measured / the first flow through the first exhaust gas channel or the second exhaust gas channel Rated flow rate of combustion exhaust gas or second combustion exhaust gas x 100 (1)
- the flow rates of the first combustion exhaust gas and the second combustion exhaust gas introduced into the nitrogen oxide removing unit are adjusted, and the temperature of the integrated combustion exhaust gas is set to 300 ° C. or more and 400 ° C. or less. It is preferable that a control unit for controlling is provided. With this configuration, since the gas temperature of the integrated combustion exhaust gas introduced into the nitrogen oxide removing portion can below 400 ° C. 300 ° C. or higher which is suitable for decomposition treatment of the nitrogen oxides, to the CO 2 recovering solution in the CO 2 recovery unit It is possible to efficiently reduce the amount of nitrogen oxide-derived components accumulated.
- the nitrogen oxide removing unit is provided in the integrated exhaust heat recovery unit.
- the integrated exhaust heat recovery unit and the nitrogen oxide removal unit can be integrated, so that the equipment of the exhaust gas treatment device can be downsized and simplified.
- the nitrogen oxide removing unit includes a nitrogen oxide removing catalyst for removing nitrogen oxides and a reducing agent injecting unit for injecting a reducing agent.
- the exhaust gas treatment apparatus further includes a control unit that controls the supply amount of the reducing agent based on the gas flow rate and nitrogen oxide concentration of the integrated combustion exhaust gas introduced into the CO 2 recovery unit. .
- the nitrogen oxide in the integrated combustion exhaust gas introduced into the CO 2 recovery unit can be controlled to a desired concentration range.
- the integrated exhaust heat recovery unit drives a CO 2 compression unit that compresses CO 2 discharged from the CO 2 recovery unit by the exhaust heat of the integrated combustion exhaust gas from which the nitrogen oxides have been removed. generates use steam, it is preferable to supply the generated CO 2 compression unit driving steam to CO 2 compression unit.
- the exhaust heat of the integrated combustion exhaust gas can be effectively utilized as the CO 2 compression unit driving steam, and the operating cost of the exhaust gas treatment device can be reduced.
- the integrated exhaust heat recovery unit generates turbine driving steam by exhaust heat of the integrated combustion exhaust gas from which the nitrogen oxides have been removed, and the generated turbine driving steam is used as a steam turbine. It is preferable to supply. With this configuration, the exhaust heat of the integrated combustion exhaust gas can be effectively utilized as turbine driving steam, and the operating cost of the exhaust gas treatment device can be reduced.
- the temperature and gas flow rate of the integrated combustion exhaust gas introduced into the nitrogen oxide removing unit are measured and supplied to the combustor of the power generation facility based on the measured temperature and gas flow rate. It is preferable to provide a control unit that controls at least one of the amount of fuel to be supplied and the amount of steam supplied to the steam turbine. With this configuration, it is possible to control the temperature and flow rate of the integrated combustion exhaust gas introduced into the nitrogen oxide removing unit within a desired range.
- At least one of the first power generation facility and the second power generation facility includes an existing power generation facility.
- the exhaust gas treatment method of the present invention is such that when at least one power generation load of the first power generation facility and the second power generation facility is less than a predetermined threshold, the power generation load is lower than the predetermined threshold. At least a part of the first combustion exhaust gas discharged and the second combustion exhaust gas discharged from the second power generation facility are discharged to the outside, and at least a part of the combustion exhaust gas discharge process is discharged to the outside.
- a nitrogen oxide removal step of integrating the first combustion exhaust gas and the second combustion exhaust gas to remove nitrogen oxides in the integrated combustion exhaust gas; and the integrated combustion exhaust gas from which nitrogen oxides have been removed in the nitrogen oxide removal step ingredients and integrated heat recovery step and a CO 2 recovery step of recovering the CO 2 in the integrated flue gas waste heat is recovered in the integrated heat recovery process by CO 2 recovery liquid for recovering the waste heat Characterized in that it.
- the exhaust gas treatment device can adjust the concentration of nitrogen oxides in the integrated combustion exhaust gas to a concentration range suitable for the decomposition treatment of nitrogen oxides, so that the nitrogen oxides in the integrated combustion exhaust gas are efficiently decomposed. It can be removed. Therefore, it is possible to realize an exhaust gas treatment method that can reduce the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent and reduce the operating cost.
- an exhaust gas treatment apparatus and an exhaust gas treatment method that can reduce the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent and reduce the operating cost.
- FIG. 1 is a schematic diagram showing an example of an exhaust gas treatment apparatus according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram of the power generation facility according to the embodiment of the present invention.
- FIG. 3 is a diagram showing the relationship between the exhaust gas load and the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent.
- FIG. 4 is a schematic diagram showing another example of the exhaust gas treatment apparatus according to the embodiment of the present invention.
- FIG. 5 is a schematic diagram showing another example of the exhaust gas treatment apparatus according to the embodiment of the present invention.
- FIG. 6 is a schematic view showing another example of the exhaust gas treatment apparatus according to the embodiment of the present invention.
- FIG. 7 is a diagram illustrating an accumulation amount of nitrogen oxide-derived components in the CO 2 absorbent of the exhaust gas treatment apparatus according to the example and the comparative example.
- the inventors have focused on the fact that nitrogen oxides in the combustion exhaust gas discharged from the power generation facility significantly increase when the power generation load of the power generation facility decreases. Then, the present inventors have conceived that, among a plurality of power generation facilities, exhaust of combustion exhaust gas in which the power generation load is reduced and nitrogen oxides are increased through the exhaust gas exhaust passage. Accordingly, the present inventors to reduce the nitrogen oxides concentration in the integrated combustion exhaust gas that integrates the combustion exhaust gas discharged from a plurality of power generation equipment becomes possible, the nitrogen oxide component due to the CO 2 absorbing solution It has been found that the amount of accumulation can be reduced and the operating cost can be reduced, and the present invention has been completed.
- FIG. 1 is a schematic diagram showing an example of an exhaust gas treatment apparatus 1 according to an embodiment of the present invention.
- the exhaust gas treatment apparatus 1 according to this embodiment, power plant flue gas (first combustion gas) discharged from the (first power plant) 10-1 which generates the flue gas G 11 G
- the integrated exhaust heat recovery boiler 12 After the exhaust heat of the combustion exhaust gas (second combustion exhaust gas) G 11-2 discharged from 11-1 and the power generation facility (second power generation facility) 10-2 is recovered by the integrated exhaust heat recovery boiler 12, the integrated combustion exhaust gas G21 CO 2 contained in is recovered by the CO 2 recovery unit 13 and discharged.
- Exhaust gas treatment apparatus 1 includes a power generation equipment 10-1 for discharging the combustion exhaust gas G 11-1, a power generation equipment 10-2 for discharging the combustion exhaust gas G 11-2, power generation equipment in the flow direction of the combustion exhaust gas G 11 10- an exhaust heat recovery boiler 11 and the integrated heat recovery steam generator 12 is provided in one of the subsequent, the CO 2 recovery unit 13 disposed downstream of the integrated heat recovery boiler 12, provided downstream of the CO 2 recovery unit 13 The CO 2 compression unit 14 is provided.
- a chimney 15 for discharging a part of the combustion exhaust gas G 11 is provided at the rear stage of the exhaust exhaust heat recovery boiler 11.
- FIG. 2 is a schematic diagram of the power generation facilities 10-1 and 10-2 according to the present embodiment.
- the power generation facilities 10-1 and 10-2 are shown as the power generation facility 10 because they have the same configuration.
- the power generation facility 10 is a single-shaft combined power generation facility (gas turbine combined cycle) in which a gas turbine 210, a steam turbine 220, and a generator 230 are configured as a single shaft.
- the gas turbine 210 includes a compressor 211 that compresses the air A, a combustor 212 that combusts the air A compressed by the compressor together with the fuel F, and a turbine 213 that is rotationally driven by the combustion gas generated in the combustor 212.
- the compressor 211 and the turbine 213 are connected via a turbine shaft 240.
- the steam turbine 220 is a medium-pressure / high-pressure steam in which a low-pressure steam turbine 221 that is rotationally driven by low-pressure steam, an intermediate-pressure steam turbine 222A that is rotationally driven by medium-pressure steam, and a high-pressure steam turbine 222B that is rotationally driven by high-pressure steam.
- the low-pressure steam turbine 221 and the intermediate-pressure / high-pressure steam turbine 222 are connected to the generator 230 via the turbine shaft 240 and are connected to the gas turbine 210.
- the generator 230 generates power by rotating the gas turbine 210 and the steam turbine 220 via the turbine shaft 240.
- the power generation facility 10-1 discharges the combustion exhaust gas G 11-1 generated by the power generation to the exhaust gas line (first exhaust gas flow path) L 11-1 .
- the exhaust gas line L 11-1 supplies the combustion exhaust gas G 11-1 discharged from the power generation facility 10-1 toward the integrated exhaust heat recovery boiler 12.
- the exhaust gas line L 11-1, the flow control valve V 11-1 for adjusting the flow rate of the combustion exhaust gas G 11-1 through the exhaust gas line L 11-1 are provided.
- the exhaust gas line L 11-1 includes an exhaust gas exhaust line that branches from the exhaust gas line L 11-1 downstream of the flow control valve V 11-1 between the power generation facility 10-1 and the integrated exhaust heat recovery boiler 12.
- An exhaust gas exhaust flow path) L 12-1 is provided.
- the exhaust gas exhaust line L 12-1 is provided with a flow control valve V 12-1 , an exhaust exhaust heat recovery boiler 11 and a chimney 15 in this order.
- the flow rate control valve V 12-1 adjusts the flow rate of the exhaust combustion exhaust gas G 12-1 flowing through the exhaust gas exhaust line L 12-1 .
- the exhaust exhaust heat recovery boiler 11 recovers exhaust heat of the exhaust combustion exhaust gas G 12-1 flowing through the exhaust gas exhaust line L 12-1 , and supplies the exhaust combustion exhaust gas G 12-1 recovered from the exhaust heat to the chimney 15.
- the chimney 15 discharges the exhaust combustion exhaust gas G 12-1 from which the exhaust heat has been recovered to the outside. Note that the exhaust exhaust heat recovery boiler 11 is not necessarily provided.
- the power generation facility 10-2 discharges the combustion exhaust gas G 11-2 generated by the power generation to the exhaust gas line (second exhaust gas flow path) L 11-2 .
- the exhaust gas line L 11-2 supplies the combustion exhaust gas G 11-2 discharged from the power generation facility 10-2 toward the integrated exhaust heat recovery boiler 12.
- the exhaust gas line L 11-2, the flow control valve V 11-2 for adjusting the flow rate of the combustion exhaust gas G 11-1 through the exhaust gas line L 11-1 are provided.
- the exhaust gas line L 11-2 includes an exhaust gas exhaust line that branches from the exhaust gas line L 11-2 downstream of the flow control valve V 11-2 between the power generation facility 10-2 and the integrated exhaust heat recovery boiler 12 ( An exhaust gas exhaust flow path) L 12-2 is provided.
- This exhaust gas exhaust line L 12-2, the flow control valve V 12-2 for adjusting the flow rate of the exhaust combustion exhaust gas G 12-2 through the gas exhaust line L 12-2 are provided. Further, the exhaust gas exhaust line L 12-2 is connected to the exhaust gas exhaust line L 12-1 to become an integrated exhaust gas exhaust line L 31 .
- Integration heat recovery boiler 12 is integrated flue gas G21 which the combustion exhaust gas G 11-2 through the combustion exhaust gas G 11-1 and the exhaust gas line L 11-2 through the exhaust gas line L 11-1 are integrated is supplied .
- the integrated exhaust heat recovery boiler 12 recovers the exhaust heat of the integrated combustion exhaust gas G21.
- the integrated exhaust heat recovery boiler 12 is provided with a nitrogen oxide removing unit 120 for reducing and removing nitrogen oxides such as nitrogen monoxide and nitrogen dioxide contained in the integrated combustion exhaust gas G21.
- the nitrogen oxide removing unit 120 is not necessarily provided integrally with the integrated exhaust heat recovery boiler 12, and may be provided outside the integrated exhaust heat recovery boiler 12.
- the nitrogen oxide removing unit 120 is provided downstream of the reducing agent supply unit 121 that injects a reducing agent that reduces nitrogen oxides into the integrated combustion exhaust gas G21, and the reducing agent supply unit 121, and selectively reduces nitrogen oxides. And a selective catalytic reduction (SCR) portion 122 filled with a denitration catalyst.
- the reducing agent in the reducing agent supply unit 121 is not particularly limited as long as it can decompose and remove nitrogen oxides such as nitrogen monoxide and nitrogen dioxide.
- the denitration catalyst of the selective catalyst reduction unit 122 is not particularly limited as long as it can decompose and remove nitrogen oxides such as nitrogen monoxide and nitrogen dioxide.
- the integrated exhaust heat recovery boiler 12 supplies the reducing agent from the reducing agent supply unit 121 into the integrated combustion exhaust gas G21 in the nitrogen oxide removing unit 120, and decomposes the nitrogen oxide supplied with the reducing agent in the selective catalyst reduction unit 122. Process. Further, the integrated exhaust heat recovery boiler 12 recovers exhaust heat of the integrated combustion exhaust gas G21 in which nitrogen oxides are decomposed, and supplies the integrated combustion exhaust gas G21 recovered from the exhaust heat to the CO 2 recovery unit 13.
- CO 2 recovery unit 13 the CO 2 absorption tower in which carbon dioxide in the integrated flue gas G21 of (CO 2) is recovered by the CO 2 absorbing liquid, by heating the CO 2 absorbing solution which has absorbed CO 2 CO 2 absorbing solution And a CO 2 regeneration tower for releasing CO 2 from the reactor.
- the CO 2 recovery liquid is not particularly limited as long as it can recover carbon dioxide (CO 2 ) in the integrated combustion exhaust gas G21.
- an amine-based absorption liquid can be used.
- the CO 2 recovery unit 13 discharges the integrated combustion exhaust gas G21 from which CO 2 has been recovered to the outside, and supplies the recovered CO 2 to the CO 2 compression unit 14.
- the CO 2 compression unit 14 compresses and discharges CO 2 supplied from the CO 2 recovery unit 13.
- the exhaust gas treatment apparatus 1 includes a first exhaust gas measurement unit 16 that measures the gas flow rate and temperature of the integrated combustion exhaust gas G21 introduced into the integrated exhaust heat recovery boiler 12, and an integrated combustion exhaust gas that is introduced into the CO 2 recovery unit 13.
- a second exhaust gas measurement unit 17 that measures the gas flow rate and nitrogen oxide concentration of G21; the flow rates of combustion exhaust gases G 11-1 and G 11-2 that are introduced into the integrated exhaust heat recovery boiler 12; and the fuel F to the power generation facility 10
- a control unit 18 for controlling the supply amount of the reducing agent supplied from the reducing agent supply unit 121 into the integrated combustion exhaust gas G21, and the combustion exhaust gas G 11- flowing through the exhaust gas lines L 11-1 and L 11-2.
- a flow rate measuring unit 19 for measuring the flow rate of G 11-2 and the flow rate of exhaust combustion exhaust gas G 12-1 and G 12-2 flowing through the exhaust gas exhaust lines L 12-1 and L 12-2 ;
- an output measuring unit 20 that measures the power generation output of 1,10-2. Measurement of gas flow rate and temperature in the first exhaust gas measurement unit 16, measurement of gas flow rate and nitrogen oxide concentration in the second exhaust gas measurement unit 17, combustion exhaust gases G 11-1 and G 11-2 and exhaust combustion in the flow rate measurement unit 19 The measurement of the flow rates of the exhaust gases G 12-1 and G 12-2 and the measurement of the power generation output of the power generation facilities 10-1 and 10-2 in the output measuring unit 20 are performed by a conventionally known method.
- the control unit 18 controls the flow rate control valves V 11-1 , V 11-2 , V 12-1 , V 12-2. And the amount of fuel supplied to the power generation facility 10 are adjusted. Further, the control unit 18 flows through the exhaust gas line L 11-1 , the flow rate of the combustion exhaust gas G 11-1 , the flow rate of the combustion exhaust gas G 11-2 flowing through the exhaust gas line L 11-2 , and the exhaust gas exhaust line L 12-1 . Based on at least one of the flow rate of the exhaust combustion exhaust gas G 12-1, the flow rate of the exhaust combustion exhaust gas G 12-2 flowing through the exhaust gas exhaust line L 12-2 , and the power generation output of the power generation equipment 10-1, 10-2.
- the flow rate of the combustion exhaust gas G 11-1 and G 11-2 introduced into the exhaust heat recovery boiler 12 is controlled. Further, the control unit 18 controls the supply amount of the fuel F to the power generation facility 10 based on the gas flow rate and the nitrogen oxide concentration of the integrated combustion exhaust gas G21 measured by the second exhaust gas measurement unit 17.
- the control unit 18 adjusts the opening degree of the flow rate control valves V 11-1 , V 11-2 , V 12-1 , and V 12-2 based on the power generation load of the power generation facilities 10-1 and 10-2, and exhaust gas.
- the flow rate of the exhaust combustion exhaust gas G 12-1 and G 12-2 flowing through the exhaust lines L 12-1 and L 12-2 is controlled.
- the control unit 18 controls the flow rate control valve V 11-1. Is controlled at least one of the reduction of the opening degree and the increase of the opening degree of the flow control valve V12-1 .
- the combustion exhaust gas G 11-1 having an increased concentration of nitrogen oxides due to a decrease in the power generation output can be discharged as the exhaust combustion exhaust gas G 12-1. Therefore, the concentration of nitrogen oxides in the integrated combustion exhaust gas G21 Can be reduced. As a result, it is possible to reduce the introduction amount of nitrogen oxides in the integrated heat recovery steam 12, it is possible to reduce the storage amount of nitrogen oxides due components in the CO 2 recovery liquid CO 2 recovery unit 13 .
- the control unit 18 increases the opening degree of the flow control valve V11-1 and sets the flow control valve V12-1 . Control at least one of the reduction of the opening.
- the exhaust combustion exhaust gas G 12-1 having a reduced nitrogen oxide concentration due to an increase in power generation output can be introduced into the integrated exhaust heat recovery boiler 12 as the combustion exhaust gas G 11-1 , so that the integrated exhaust heat recovery boiler 12 The amount of exhaust heat recovered at 12 can be increased.
- the control unit 18 controls the flow rate control valve V 11. At least one of the reduction of the opening of -2 and the increase of the opening of the flow control valve V12-2 are controlled.
- the exhaust combustion exhaust gas G 12-1 having an increased concentration of nitrogen oxides due to a decrease in power generation output can be discharged as the exhaust combustion exhaust gas G 12-2 , so that the nitrogen oxides in the integrated combustion exhaust gas G21 The concentration can be reduced.
- the control unit 18 increases the opening degree of the flow control valve V11-2 and sets the flow control valve V12-2 . Control at least one of the reduction of the opening.
- the exhaust combustion exhaust gas G 12-2 in which the concentration of nitrogen oxides is reduced by increasing the power generation output can be introduced into the integrated exhaust heat recovery boiler 12 as the combustion exhaust gas G 11-2. The amount of exhaust heat recovered at 12 can be increased.
- the control unit 18 At least one of the reduction of the opening degree of the flow control valve V 11-1 and the increase of the opening degree of the flow control valve V 12-1 is controlled.
- the flow rate decreases as the power generation output decreases, and the combustion exhaust gas G 11-1 having an increased concentration of nitrogen oxides can be discharged as the exhaust combustion exhaust gas G 12-1. Therefore, the integrated combustion exhaust gas G21 The concentration of nitrogen oxides therein can be reduced.
- the control unit 18 increases the opening degree of the flow control valve V 11-1 and At least one of the reductions in the opening degree of the flow control valve V 12-1 is controlled. As a result, the flow rate increases as the power generation output increases, and the combustion exhaust gas G 11-1 with reduced nitrogen oxides can be introduced into the integrated exhaust heat recovery boiler 12. The amount of exhaust heat recovered can be increased.
- the control unit 18 At least one of the reduction of the opening degree of the flow control valve V 11-2 and the increase of the opening degree of the flow control valve V 12-2 are controlled.
- the flow rate decreases as the power generation output decreases, and the combustion exhaust gas G 11-2 having an increased nitrogen oxide concentration can be discharged as the exhaust combustion exhaust gas G 12-2.
- the concentration of nitrogen oxides therein can be reduced.
- the control unit 18 increases the opening degree of the flow control valve V 11-2 and At least one of the reductions in the opening degree of the flow control valve V 12-2 is controlled.
- the flow rate increases as the power generation output increases, and the introduction amount of the combustion exhaust gas G 11-2 having a reduced concentration of nitrogen oxides into the integrated exhaust heat recovery boiler 12 can be increased.
- the amount of exhaust heat recovered by the exhaust heat recovery boiler 12 can be increased.
- the control unit 18 for example, the combustion exhaust gas to be introduced into the integrated exhaust heat recovery boiler 12 based on the exhaust gas load calculated based on the following formula (1). It is preferable to control the flow rates of G 11-1 and G 11-2 .
- the rated flow rate is the flow rate of the combustion exhaust gas G 11-1 and G 11-2 flowing through the exhaust gas lines L 11-1 and L 11-2 during the normal operation of the power generation facilities 10-1 and 10-2. is there.
- the exhaust gas line to be measured is a line in which combustion exhaust gas is supplied to the integrated exhaust gas line L 21 .
- Exhaust gas load (%) flow rate of combustion exhaust gas G 11-1 and G 11-2 flowing through exhaust gas lines L 11-1 and L 11-2 to be measured / flowing through exhaust gas lines L 11-1 and L 11-2
- the control unit 18 reduces the opening degree of the flow control valves V 11-1 and V 11-2 and controls the flow rate. It controls at least one of the increase of the opening degree of the valves V 12-1 and V 12-2 .
- the combustion exhaust gases G 11-1 and G 11-2 whose nitrogen oxide concentration increases with a decrease in exhaust gas load can be discharged as exhaust combustion exhaust gases G 12-1 and G 12-2 .
- the concentration of nitrogen oxides in the integrated combustion exhaust gas G21 can be reduced. As a result, it is possible to reduce the introduction amount of nitrogen oxides in the integrated heat recovery steam 12, it is possible to reduce the storage amount of nitrogen oxides due components in the CO 2 recovery liquid CO 2 recovery unit 13 .
- the control unit 18 increases the opening degree of the flow control valves V 11-1 and V 11-2 and the flow rate. Control of at least one of the opening reductions of the control valves V 12-1 and V 12-2 is performed. As a result, it is possible to increase the introduction amount of the combustion exhaust gases G 11-1 and G 11-2 in which the concentration of nitrogen oxides decreases with an increase in the exhaust gas load into the integrated exhaust heat recovery boiler 12. The amount of exhaust heat recovered by the heat recovery boiler 12 can be increased.
- FIG. 3 is a diagram showing the relationship between the exhaust gas load and the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent.
- the accumulation amount of the nitrogen oxide-derived component in the CO 2 absorbent decreases as the exhaust gas load calculated by the above formula (1) increases.
- the exhaust gas load is 60% and the accumulated amount of nitrogen oxide-derived components is about 0.28 times that of the case where the nitrogen oxide removing unit 120 is not provided, and 70% is not provided with the nitrogen oxide removing unit 120. About 0.17 times the case.
- the exhaust gas load is less than 60%, the accumulation amount of the nitrogen oxide-derived component is remarkably increased, and when the exhaust gas load is 70% or more, the rate of decrease in the accumulation amount of the nitrogen oxide-derived component is reduced.
- the reduction rate becomes the maximum in the range of% or less. Further, as the exhaust gas load approaches 100%, the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent decreases.
- the threshold value of the exhaust gas load to be set in advance is 60% or more from the viewpoint of reducing the operation amount of the exhaust gas treatment device 1 by reducing the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent. Preferably, 70% or more is more preferable, and 100% or less is preferable.
- control unit 18 adjusts at least one of the flow rate of the combustion exhaust gas G 11-1 and G 11-2 introduced into the integrated exhaust heat recovery boiler 12 and the amount of fuel supplied to the power generation facility 10 to measure the first exhaust gas.
- the temperature of the integrated combustion exhaust gas G21 measured by the unit 16 is controlled to be 300 ° C. or higher and 400 ° C. or lower.
- the exhaust gas treatment device 1 can set the temperature of the integrated combustion exhaust gas G21 supplied to the nitrogen oxide removal unit 120 of the integrated exhaust heat recovery boiler 12 to a temperature suitable for decomposition and removal of nitrogen oxides. Therefore, the nitrogen oxides in the integrated combustion exhaust gas G21 can be decomposed and removed more efficiently.
- the control unit 18 When the temperature of the integrated combustion exhaust gas G21 measured by the first exhaust gas measurement unit 16 is less than 300 ° C., the control unit 18 is connected to the power generation facilities 10-1 and 10-2 whose exhaust gas load or power generation output has decreased. and exhaust gas line L 11-1, the flow control valve V 11-1 of L 11-2, reducing the opening of the V 11-2 and the exhaust gas line L 11-1, the exhaust gas exhaust line L branching from L 11-2
- the exhaust gas G 11-1 and G 11-2 in the integrated combustion exhaust gas G21 are controlled by at least one of the increase control of the flow control valves V 12-1 and V 12-2 of the flow control valves 12-1 and L 12-2.
- the control unit 18 is connected to the power generation facilities 10-1 and 10-2 having high exhaust gas load or power generation output. has been the exhaust gas line L 11-1, the flow control valve V 11-1 of L 11-2, reducing the opening of the V 11-2 and the exhaust gas line L 11-1, the exhaust gas exhaust line branched from L 11-2
- the combustion exhaust gases G 11-1 and G 11- in the integrated combustion exhaust gas G21 are controlled by at least one of the increase of the opening degree of the flow control valves V 12-1 and V 12-2 of L 12-1 and L 12-2. Reduce the ratio of 2 .
- the amount of the exhaust gas G 11-1 and G 11-2 introduced into the integrated exhaust heat recovery boiler 12 can be reduced because the exhaust gas load or the power generation output in the integrated combustion exhaust gas G21 is high and the temperature rises.
- the temperature of the integrated combustion exhaust gas G21 measured by the first exhaust gas measurement unit 16 decreases.
- the control unit 18 maintains the opening degree of the flow control valves V 11-1 , V 11-2 , V 12-1 , and V 12-2 to generate the power generation equipment 10-1,
- the temperature of the integrated combustion exhaust gas G21 may be increased by decreasing the supply amount of the fuel F to 10-2.
- control unit 18 adjusts the supply amount of the reducing agent supplied from the reducing agent supply unit 121, and the nitrogen oxide concentration in the integrated combustion exhaust gas G21 measured by the second exhaust gas measurement unit 17 is less than or equal to a predetermined value. Control to be. When the nitrogen oxide concentration in the integrated combustion exhaust gas G21 measured by the second exhaust gas measurement unit 17 exceeds a predetermined value, the control unit 18 increases the supply amount of the reducing agent from the reducing agent supply unit 121. Further, when the nitrogen oxide concentration in the integrated combustion exhaust gas G21 measured by the second exhaust gas measurement unit 17 is less than a predetermined value, the supply amount of the reducing agent from the reducing agent supply unit 121 is maintained or reduced.
- Such control exhaust gas treatment apparatus since the concentration of nitrogen oxides in the integrated flue gas G21 introduced into the CO 2 recovery unit 13 can be controlled to a predetermined value or less, is discharged from the CO 2 recovery unit 13 CO 2 Nitrogen oxides in the integrated combustion exhaust gas G21 after recovery can be efficiently reduced.
- the combustion exhaust gas G 11-1 discharged from the power generation facility 10-1 is supplied to the integrated exhaust gas line L 21 via the exhaust gas line L 11-1 .
- the power generation output of the power generation facility 10-1 and the exhaust gas load and at least part of the flow rate of the combustion exhaust gas G 11-1 flowing through the exhaust gas line L 11-1 are reduced, and the nitrogen oxidation in the combustion exhaust gas G 11-1 is reduced.
- the concentration of the substance increases, at least a part of the combustion exhaust gas G 11-1 branches to the exhaust gas exhaust line L 12-1 and flows as exhaust combustion exhaust gas G 12-1 .
- the exhaust combustion exhaust gas G 12-1 flowing through the exhaust gas exhaust line L 12-1 is supplied to the integrated exhaust gas exhaust line L 31 after the exhaust heat is recovered by the exhaust exhaust heat recovery boiler 11. Further, the combustion exhaust gas G 11-2 discharged from the power generation facility 10-2 is supplied to the integrated exhaust gas line L 21 via the exhaust gas line L 11-2 .
- the power generation output of the power generation facility 10-2, the exhaust gas load, and at least part of the flow rate of the combustion exhaust gas G 11-2 flowing through the exhaust gas line L 11-2 are reduced, and the nitrogen oxidation in the combustion exhaust gas G 11-2 is reduced.
- the concentration of the substance increases, at least a part of the combustion exhaust gas G 11-2 branches to the exhaust gas exhaust line L 12-2 and flows as exhaust combustion exhaust gas G 12-2 .
- the exhaust combustion exhaust gas G 12-2 flowing through the exhaust gas exhaust line L 12-2 is supplied to the integrated exhaust gas exhaust line L 31 .
- the exhaust combustion exhaust gas G 12-1 and G 12-2 supplied to the integrated exhaust gas exhaust line L 31 are integrated into the integrated exhaust combustion exhaust gas G 31 and discharged from the chimney 15.
- the combustion exhaust gases G 11-1 and G 11-2 supplied to the integrated exhaust gas line L 21 are integrated and supplied to the integrated exhaust heat recovery boiler 12 as an integrated combustion exhaust gas G 21.
- the control unit 18 controls the valve opening degrees of the flow rate control valve V 11-1 and the flow rate control valve V 11-2 and the supply amount of fuel supplied to the power generation facility 10 as necessary.
- the temperature of the integrated combustion exhaust gas G21 is controlled to be a predetermined temperature (for example, 300 ° C. or more and 400 ° C. or less).
- the integrated combustion exhaust gas G21 supplied to the integrated exhaust heat recovery boiler 12 is supplied with a reducing agent by the reducing agent supply unit 121 of the nitrogen oxide removing unit 120 and decomposed and removed by the selective catalyst reducing unit 122.
- the control unit 18 includes the reducing agent supply unit 121 in the integrated combustion exhaust gas G21 so that the nitrogen oxides in the integrated combustion exhaust gas G21 supplied to the CO 2 recovery unit 13 become a predetermined value or less as necessary.
- the amount of reducing agent supplied to the is controlled.
- the integrated combustion exhaust gas G21 supplied to the CO 2 recovery unit 13 is discharged to the outside of the exhaust gas treatment device 1 after CO 2 is recovered by the CO 2 absorbent.
- the exhaust gas treatment apparatus 1 can adjust the concentration of nitrogen oxide in the integrated combustion exhaust gas G21 introduced into the nitrogen oxide removing unit 120 to a concentration range suitable for the decomposition treatment of nitrogen oxide, It becomes possible to efficiently decompose and remove nitrogen oxides in the integrated combustion exhaust gas G21. Therefore, it is possible to realize the exhaust gas treatment apparatus 1 that can reduce the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent and reduce the operating cost.
- the configuration in which the exhaust exhaust heat recovery boiler 11 is provided in the integrated exhaust gas exhaust line L 31 has been described.
- the exhaust exhaust heat recovery boiler 11 is as in the exhaust gas treatment device 2 illustrated in FIG. may be provided in an exhaust gas exhaust line L 12-1 may be provided on the exhaust gas exhaust line L 12-2, the exhaust gas exhaust line L 12-1, it may be provided on both the L 12-2.
- the exhaust exhaust heat recovery boiler 11 is not necessarily provided.
- the exhaust gas line L 11-1 respectively exhaust gas exhaust line L 12-1 to L 11-2, an example has been described to provide a L 12-2, the exhaust gas exhaust line L 12-1, At least one of L 12-2 may be provided.
- the exhaust gas exhaust line L 12-1 is connected to the exhaust gas line L 11-1 of the power generation facility 10-1 under an operating condition in which the power generation output tends to decrease.
- the exhaust gas line L 11-2 of the power generation facility 10-2, in which the power generation output is less likely to decrease may not be provided with the exhaust gas exhaust line L 12-2 .
- the power generation facilities 10-1 and 10-2 may be existing power generation facilities or newly installed power generation facilities.
- the power generation facilities 10-1 and 10-2 are existing power generation facilities, it is only necessary to provide an exhaust gas exhaust line with respect to the existing exhaust gas line.
- FIG. 5 is a schematic diagram showing another example of the exhaust gas treatment apparatus 1 according to the above embodiment.
- the integrated exhaust heat recovery boiler 12 includes a steam generation unit 123 provided at the subsequent stage of the nitrogen oxide removal unit 120.
- the steam generation unit 123 includes a turbine drive steam generation unit 123A provided at the rear stage of the nitrogen oxide removal unit 120 in the flow direction of the integrated combustion exhaust gas G21 and a CO 2 provided at the rear stage of the turbine drive steam generation unit 123A.
- a compression unit driving steam generation unit 123B is a compressor driving steam generation unit 123B.
- the turbine driving steam generator 123 ⁇ / b> A generates the turbine driving steam S 1 that is low-pressure steam that drives the low-pressure steam turbine 21 by collecting exhaust heat of the integrated combustion exhaust gas G ⁇ b> 21 from which nitrogen oxides have been removed. Further, the turbine driving steam generation unit 123 ⁇ / b> A supplies the turbine driving steam S 1 generated via the steam supply line L 12 to the low pressure steam turbine 21.
- the low-pressure steam turbine 21 may be provided outside the exhaust gas treatment device 3, or the low-pressure steam turbine 221 of the power generation facility 10 shown in FIG. Low pressure steam turbine 21 generates power by the rotation to the generator (not shown) by a turbine driving steam S 1.
- the exhaust gas treatment apparatus 3 can generate electric power by exhaust heat of the integrated combustion exhaust gas G21 recovered by the integrated exhaust heat recovery boiler 12, it is possible to reduce steam necessary for driving the low-pressure steam turbine 21. . Further, low-pressure steam turbine 21 supplies the CO 2 recovery unit 13 the turbine driving steam S 1 after the turbine driven via the steam discharge line L 13 as the CO 2 absorbing solution regeneration steam S 2.
- the CO 2 compressor drive steam generator 123B recovers the exhaust heat of the integrated combustion exhaust gas G21 from which nitrogen oxides have been removed, and the CO 2 compressor drive steam S, which is a low pressure steam that drives the CO 2 compressor 14. 3 is generated. Further, the CO 2 compression unit driving steam generation unit 123B supplies the CO 2 compression unit driving steam S 3 generated via the steam supply line L 14 to the CO 2 compression unit 14. CO 2 compression section 14, the CO 2 compressor unit driving the steam S 3 to drive the CO 2 compressor to compress the CO 2. Thereby, since the exhaust gas treatment apparatus 3 can compress CO 2 by the exhaust heat of the integrated combustion exhaust gas G21 recovered by the integrated exhaust heat recovery boiler 12, it is possible to reduce the steam necessary for CO 2 compression. it can. Moreover, CO 2 compression section 14, the CO 2 recovery unit 13 the CO 2 compression unit driving the steam S 3 after CO 2 compressor driven through a steam discharge line L 15 as the CO 2 absorbing solution regeneration steam S 4 Supply.
- the CO 2 recovery unit 13 is a turbine driving steam generation unit 123A of the integrated exhaust heat recovery boiler 12 using the condensed water W condensed with the CO 2 absorbent regeneration steams S 2 and S 4 used in the reboiler of the CO 2 absorption tower. and CO 2 compression unit for supplying a driving steam generating unit 123B.
- the control unit 18 determines the amount of fuel supplied to the combustor of the power generation facility 10 based on the temperature and gas flow rate of the integrated combustion exhaust gas G21 introduced into the nitrogen oxide removal unit 120 measured by the first exhaust gas measurement unit 16.
- the supply amount of the turbine driving steam S 1 supplied to the low-pressure steam turbine 21 and the supply amount of the CO 2 compression unit driving steam S 3 supplied to the CO 2 compression unit 14 are controlled.
- the control unit 18 increases the fuel F supplied to the combustor 212 of the power generation facility 10 when the temperature and gas flow rate of the integrated combustion exhaust gas G21 introduced into the nitrogen oxide removing unit 120 are less than the predetermined range.
- the control unit 18 decreases the fuel F supplied to the combustor 212 of the power generation facility.
- the control unit 18 when the temperature and the gas flow integrated combustion exhaust gas G21 introduced into the nitrogen oxide removing portion 120 is greater than the predetermined range, the flow control valve V 12 and provided on the steam supply line L 12 increase least one opening of the flow control valve V 14 provided in the steam supply line L 14, CO 2 supplied to the turbine driving steam S 1 and CO 2 compression unit 14 is supplied to the low pressure steam turbine 21 the supply amount of the compression unit driving steam S 3 of increasing at least one.
- the temperature of the integrated combustion exhaust gas G21 introduced into the nitrogen oxide removal unit 120 can be controlled within a range suitable for the decomposition and removal of nitrogen oxides, so that the nitrogen oxides in the integrated combustion exhaust gas can be efficiently reduced. can do.
- the turbine driving steam generation unit 123A and the CO 2 compression unit driving steam generation unit 123B of the integrated exhaust heat recovery boiler 12 can reduce the pressure of the low-pressure steam turbine 21. required for reproduction of the need to become turbine driving steam S 1, vapor CO 2 compressor unit drive is required to compress the CO 2 S 3 and CO 2 absorbing solution to a rotary drive the CO 2 absorbing solution regeneration steam S 2 since S 4 is obtained, it is possible to reduce the amount of steam in the entire exhaust gas treatment apparatus 3.
- FIG. 6 is a schematic diagram illustrating another example of the exhaust gas treatment apparatus 1 according to the present embodiment.
- the exhaust gas treatment device 4 includes combustion exhaust gases G 11-1 and G 11- discharged from five power generation facilities 10-1, 10-2, 10-3, 10-4 , and 10-5.
- the exhaust gas treatment device 4 includes a power generation facility 10-1 for discharging the combustion exhaust gas G 11-1 , a power generation facility 10-2 for discharging the combustion exhaust gas G 11-2, and a power generation facility 10 for discharging the combustion exhaust gas G 11-3.
- a power generation facility 10-4 for discharging the combustion exhaust gas G 11-4 a power generation facility 10-5 for discharging the combustion exhaust gas G 11-5 , and power generation facilities 10-1, 10-2, 10-3, 10-4, 10-5, an integrated exhaust heat recovery boiler 12 provided downstream, a CO 2 recovery unit 13 provided downstream of the integrated exhaust heat recovery boiler 12, and a CO 2 recovery unit 13 downstream. And a CO 2 compression unit 14.
- the power generation facilities 10-3, 10-4, and 10-5 discharge the combustion exhaust gas G 11-3 generated by power generation to the exhaust gas lines L 11-3 , L 11-4 , and L 11-5 , respectively.
- the exhaust gas lines L 11-3 , L 11-4 , L 11-5 are combustion exhaust gases G 11-3 , G 11-4 , G 11- discharged from the power generation facilities 10-3, 10-4, 10-5. 5 are respectively supplied to the integrated exhaust heat recovery boiler 12.
- the exhaust gas lines L 11-3 , L 11-4 , and L 11-5 are connected to the combustion exhaust gases G 11-3 , G 11-4 , G that flow through the exhaust gas lines L 11-3 , L 11-4 , and L 11-5.
- the flow control valve V 11-3 for adjusting the flow rate of 11-5, V 11-4, V 11-5, respectively.
- a flow control valve V 11 between the power generation facilities 10-3, 10-4, and 10-5 and the integrated exhaust heat recovery boiler 12 is provided in the exhaust gas lines L 11-3 , L 11-4 , and L 11-5 .
- -3 , V 11-4 , V 11-5 , exhaust gas exhaust lines L 12-3 , L 12-4 , L 12 branch from exhaust gas lines L 11-3 , L 11-4 , L 11-5 respectively.
- -5 is provided.
- the exhaust gas exhaust lines L 12-3 , L 12-4 , and L 12-5 include flow control valves V 12-3 , V 12-4 , V 12-5 , an exhaust exhaust heat recovery boiler 11, and a chimney 15.
- the flow control valves V 12-3 , V 12-4 , V 12-5 are exhaust combustion exhaust gases G 12-3 , G 12-4 flowing through the exhaust gas exhaust lines L 12-3 , L 12-4 , L 12-5. , G 12-5 are adjusted respectively.
- the exhaust exhaust heat recovery boiler 11 recovers exhaust heat of exhaust combustion exhaust gas G 12-3 , G 12-4 , G 12-5 flowing through the exhaust gas exhaust lines L 12-3 , L 12-4 , L 12-5 , respectively. Then, the exhaust combustion exhaust gases G 12-3 , G 12-4 , and G 12-5 that have recovered the exhaust heat are supplied to the chimney 15.
- the chimney 15 discharges the exhaust combustion exhaust gases G 12-3 , G 12-4 and G 12-5 from which the exhaust heat has been recovered to the outside. Note that the exhaust exhaust heat recovery boiler 11 is not necessarily provided.
- the integrated exhaust heat recovery boiler 12 includes combustion exhaust gases G 11-1 , G 11-2 , G 11 flowing through the exhaust gas lines L 11-1 , L 11-2 , L 11-3 , L 11-4 , L 11-5.
- An integrated combustion exhaust gas G21 in which 11-3 , G11-4 , and G11-5 are integrated is supplied.
- the integrated exhaust heat recovery boiler 12 recovers the exhaust heat of the integrated combustion exhaust gas G21.
- the exhaust gas treatment device 4 is provided with a flow rate of combustion exhaust gas G 11-1 , G 11-2 , G 11-3 , G 11-4 , G 11-5 to be introduced into the integrated exhaust heat recovery boiler 12, power generation equipment 10- Control unit for controlling the supply amount of fuel F to 1, 10-2, 10-3, 10-4, and 10-5 and the supply amount of the reducing agent supplied from the reducing agent supply unit 121 into the integrated combustion exhaust gas G21 18 and combustion exhaust gases G 11-1 , G 11-2 , G 11-3 , G 11 flowing through the exhaust gas lines L 11-1 , L 11-2 , L 11-3 , L 11-4 , L 11-5 -4 , G 11-5 and exhaust gas exhaust lines L 12-1 , L 12-2 , L 12-3 , L 12-4 , L 12-5 , exhaust combustion exhaust gas G 12-1 , G 12- 2, G 12-3, G 12-4, flow measuring the flow rate of the G 12-5 It comprises a tough 19, and an output measuring unit 20 for measuring the power output of the power generation facility 10-1,10-2,10-3,
- Measurement of gas flow rate and temperature in the first exhaust gas measurement unit 16 measurement of gas flow rate and nitrogen oxide concentration in the second exhaust gas measurement unit 17, combustion exhaust gas G 11-1 , G 11-2 , G 11 in the flow rate measurement unit 19 -3 , G 11-4 , G 11-5 and the exhaust combustion exhaust gas G 12-1 , G 12-2 , G 12-3 , G 12-4 , G 12-5 , and output measurement unit 20
- the measurement of the power generation output of the power generation facilities 10-1, 10-2, 10-3, 10-4, and 10-5 is performed by a conventionally known method.
- the control unit 18 controls the flow rate control valves V 11-1 , V 11-2 , V 11-3 , V 11-4. , V 11-5 , V 12-1 , V 12-2 , V 12-3 , V 12-4 , V 12-5 and the power generation facilities 10-1, 10-2, 10-3, 10- Adjust the amount of fuel supplied to 4,10-5.
- control unit 18 controls the exhaust gas lines L 11-1 , L 11-2 , L 11-3 , L 11-4 , L 11-5 and the exhaust gas exhaust lines L 12-1 , L 12-2 , L 12- 3 , L 12-4 , L 12-5 , combustion exhaust gas G 11-1 , G 11-2 , G 11-3 , G 11-4 , G 11-5 flow rate and power generation equipment 10-1, 10- Combustion exhaust gases G 11-1 , G 11-2 , G 11-3 , which are introduced into the integrated exhaust heat recovery boiler 12 based on at least one of the power generation outputs 2, 10-3, 10-4, 10-5 The flow rates of G 11-4 and G 11-5 are controlled.
- control unit 18 generates power generation facilities 10-1, 10-2, 10-3, 10-4 based on the gas flow rate and nitrogen oxide concentration of the integrated combustion exhaust gas G21 measured by the second exhaust gas measurement unit 17. , 10-5, the supply amount of fuel F is controlled. Since the specific control of each part by the control part 18 and other structures are the same as those in the exhaust gas treatment apparatus 1 shown in FIG.
- Combustion exhaust gas G 11-1 , G 11-2 , G 11-3 , G 11-4 , G 11- discharged from the power generation facilities 10-1, 10-2, 10-3, 10-4 , 10-5 5 is supplied to the integrated exhaust gas line L 21 via the exhaust gas lines L 11-1 , L 11-2 , L 11-3 , L 11-4 , L 11-5 .
- at least part of the power generation load of the power generation facilities 10-1, 10-2, 10-3, 10-4, 10-5 is reduced, and the concentration of nitrogen oxides in the combustion exhaust gas G 11-1 is reduced.
- At least a part of the combustion exhaust gases G 11-1 , G 11-2 , G 11-3 , G 11-4 , G 11-5 are exhaust gas exhaust lines L 12-1 , L 12-2 , The flow branches into L 12-3 , L 12-4 , and L 12-5 .
- Combustion exhaust gas G 11-1 , G 11-2 , G 11-3 , G 11-4 flowing through the exhaust gas exhaust lines L 12-1 , L 12-2 , L 12-3 , L 12-4 , L 12-5 , G 11-5 is supplied to the integrated exhaust gas exhaust line L 31 after the exhaust heat is recovered by the exhaust exhaust heat recovery boiler 11.
- Combustion exhaust gas G 11-1 , G 11-2 , G 11-3 , G 11-4 , G 11-5 supplied to the integrated exhaust gas exhaust line L 31 are integrated into the integrated combustion exhaust gas G 21 from the chimney 15. Discharged.
- Combustion exhaust gas G 11-1 , G 11-2 , G 11-3 , G 11-4 , G 11-5 supplied to the integrated exhaust gas line L 21 are integrated and integrated exhaust heat recovery as an integrated combustion exhaust gas G21. It is supplied to the boiler 12.
- the control unit 18 adjusts the valve opening of the flow control valves V 11-1 , V 11-2 , V 11-3 , V 11-4 , V 11-5 and the power generation equipment 10-1 as necessary.
- 10-2, 10-3, 10-4, and 10-5 the temperature of the integrated combustion exhaust gas G21 is controlled to a predetermined temperature (for example, 300 ° C. or more and 400 ° C. or less).
- the integrated combustion exhaust gas G21 supplied to the integrated exhaust heat recovery boiler 12 is supplied with a reducing agent by the reducing agent supply unit 121 of the nitrogen oxide removing unit 120 and decomposed and removed by the selective catalyst reducing unit 122. , Supplied to the CO 2 recovery unit 13.
- the control unit 18 is supplied from the reducing agent supply unit 121 into the integrated combustion exhaust gas G21 so that the nitrogen oxides in the integrated combustion exhaust gas G21 supplied to the CO 2 recovery unit 13 are equal to or lower than a predetermined value. Control the amount of reducing agent.
- the integrated combustion exhaust gas G21 supplied to the CO 2 recovery unit 13 is discharged to the outside of the exhaust gas treatment device 4 after CO 2 is recovered by the CO 2 absorbent. CO 2 integrated combustion exhaust gas G21 recovered by the CO 2 absorbing solution, after being dissipated from the CO 2 absorbing solution by heating, are discharged is compressed is fed to the CO 2 compression section 14.
- the combustion exhaust gas G 11-1 discharged from at least one of the power generation facilities 10-1, 10-2, 10-3, 10-4, 10-5 .
- the exhaust gas exhaust lines L 12-1 , L 12-2 , L 12-3 , L 12 -4 and L 12-5 through at least one of the combustion exhaust gases G 11-1 , G 11-2 , G 11-3 , G 11-4 , G 11-5 having an increased concentration of nitrogen oxides One can be discharged to the outside as exhaust combustion exhaust gas G 12-1 , G 12-2 , G 12-3 , G 12-4 , G 12-5 .
- the exhaust gas treatment apparatus 4 can adjust the concentration of nitrogen oxide in the integrated combustion exhaust gas G21 introduced into the nitrogen oxide removing unit 120 to a concentration range suitable for the decomposition treatment of nitrogen oxide, It becomes possible to efficiently decompose and remove nitrogen oxides in the integrated combustion exhaust gas G21. Therefore, it is possible to realize the exhaust gas treatment device 4 that can reduce the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent and reduce the operating cost.
- the configuration of the exhaust gas treatment device 4 can be obtained by simply installing the power generation facilities 10-3, 10-4, and 10-5. can do.
- the power generation load and the exhaust gas load of the existing two power generation facilities 10-1 and 10-2 tend to be lower than the three new power generation facilities 10-3, 10-4, and 10-5
- the concentration of the product can be adjusted to a concentration range suitable for the decomposition treatment of nitrogen oxides.
- the exhaust gas treatment device 4 among the plurality of power generation facilities 10-1, 10-2, 10-3, 10-4, and 10-5, the power generation load and the exhaust gas load that are likely to decrease are exhausted.
- Exhaust combustion exhaust gases G 12-1 , G 12-2 , G 12-3 , G 12- are provided by providing exhaust lines L 12-1 , L 12-2 , L 12-3 , L 12-4 , L 12-5. 4 , by operating while switching the flow rate of G 12-5, the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent can be reduced, and the exhaust gas treatment device 4 capable of reducing operating costs can be realized.
- Example The present inventors have examined in detail the effect of reducing the amount of nitrogen oxide (NO 2 ) -derived components accumulated in the CO 2 absorbent in the exhaust gas treatment apparatus according to the above embodiment. The contents examined by the inventors will be described below.
- NO 2 nitrogen oxide
- FIG. 7 is an explanatory diagram of the amount of nitrogen oxide-derived components accumulated in the CO 2 absorbent of the exhaust gas treatment apparatus according to the example and the comparative example.
- the exhaust gas treatment apparatus 1 according to the above embodiment by the exhaust gas treatment apparatus 1 according to the above embodiment, the accumulated amount of nitrogen oxide-derived components (see the example) when the exhaust gas lines L 11-1 and L 11-2 are provided, and the exhaust gas line The amount of accumulation of nitrogen oxide-derived components (see Comparative Example) when L 11-1 and L 11-2 are not provided is shown in comparison.
- FIG. 7 by providing the exhaust gas lines L 11-1 and L 11-2 , it becomes possible to reduce the accumulation amount of nitrogen oxide-derived components in the CO 2 absorbent by about 0.5 times. . From this result, according to the exhaust gas treatment apparatus 1 according to the above-described embodiment, it is possible to significantly reduce nitrogen oxides accumulated in the CO 2 absorbent, and to reduce the operating cost of the exhaust gas treatment apparatus. I understand that.
- Exhaust gas treatment apparatus 10-1, 10-2, 10-3, 10-4, 10-5 Power generation equipment 11 Exhaust exhaust heat recovery boiler 12 Integrated exhaust heat recovery boiler 13 CO 2 recovery section 14 CO 2 compression section 15 chimney 16 first exhaust gas measuring unit 17 second exhaust gas measuring unit 18 control unit 19 flow measuring unit 20 outputs the measurement unit 21 low pressure steam turbine 210 gas turbine 211 compressor 212 combustor 213 turbine 221 low pressure steam turbine 222 Medium pressure / high pressure steam turbine 222A Medium pressure steam turbine 222B High pressure steam turbine 230 Generator 240 Turbine shaft A Air F Fuel G11-1 , G11-2 , G11-3 , G11-4 , G11-5 combustion exhaust gas G 12-1, G 12-2, G 12-3 , G 12-4, G 12-5 exhaust combustion exhaust gas G 21 integrated retardant Baked exhaust gas G 31 integrated exhaust flue L 11-1, L 11-2, L 11-3 , L 11-4, L 11-5 exhaust gas line L 12-1, L 12-2, L 12-3 , L 12-4 , L 12-5 exhaust gas exhaust line L 21 integrated exhaust
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Abstract
Description
排ガス負荷(%)=測定対象となる第1排ガス流路又は第2排ガス流路を流れる第1燃焼排ガス又は第2燃焼排ガスの流量/第1排ガス流路又は第2排ガス流路を流れる第1燃焼排ガス又は第2燃焼排ガスの定格流量×100・・・式(1)
排ガス負荷(%)=測定対象となる排ガスラインL11-1,L11-2を流れる燃焼排ガスG11-1,G11-2の流量/排ガスラインL11-1,L11-2を流れる燃焼排ガスG11-1,G11-2の定格流量×100・・・式(1)
本発明者らは、上記実施の形態に係る排ガス処理装置におけるCO2吸収液への窒素酸化物(NO2)起因成分の蓄積量の低減効果について詳細に調べた。以下、本発明者らが調べた内容について説明する。
10,10-1,10-2,10-3,10-4,10-5 発電設備
11 排気排熱回収ボイラ
12 統合排熱回収ボイラ
13 CO2回収部
14 CO2圧縮部
15 煙突
16 第1排ガス測定部
17 第2排ガス測定部
18 制御部
19 流量測定部
20 出力測定部
21 低圧蒸気タービン
210 ガスタービン
211 圧縮機
212 燃焼器
213 タービン
221 低圧蒸気タービン
222 中圧・高圧蒸気タービン
222A 中圧蒸気タービン
222B 高圧蒸気タービン
230 発電機
240 タービン軸
A 空気
F 燃料
G11-1,G11-2,G11-3,G11-4,G11-5 燃焼排ガス
G12-1,G12-2,G12-3,G12-4,G12-5 排気燃焼排ガス
G21 統合燃焼排ガス
G31 統合排気燃焼排ガス
L11-1,L11-2,L11-3,L11-4,L11-5 排ガスライン
L12-1,L12-2,L12-3,L12-4,L12-5 排ガス排気ライン
L21 統合排ガスライン
L31 統合排ガス排気ライン
V11-1,V11-2,V11-3,V11-4,V11-5 流量制御弁
Claims (16)
- 第1発電設備から排出される第1燃焼排ガスが流れる第1排ガス流路と、
第2発電設備から排出される第2燃焼排ガスが流れる第2排ガス流路と、
前記第1排ガス流路及び前記第2排ガス流路の少なくとも一方から分岐して設けられ、前記第1排ガス流路を流れる前記第1燃焼排ガス及び前記第2排ガス流路を流れる前記第2燃焼排ガスの少なくとも一方の少なくとも一部を排気燃焼排ガスとして排出する排ガス排気流路と、
前記第1排ガス流路を流れる第1燃焼排ガスと前記第2排ガス流路を流れる第2燃焼排ガスとを統合した統合燃焼排ガス中の窒素酸化物を除去する窒素酸化物除去部と、
前記窒素酸化物除去部で窒素酸化物を除去した前記統合燃焼排ガスの排熱を回収する統合排熱回収部と、
前記統合排熱回収部で排熱が回収された前記統合燃焼排ガス中のCO2をCO2回収液によって回収するCO2回収部とを具備することを特徴とする、排ガス処理装置。 - 前記排ガス排気流路を流れる排気燃焼排ガスの排熱を回収する排気排熱回収部を備えた、請求項1に記載の排ガス処理装置。
- 前記統合排熱回収部に導入する前記第1燃焼排ガス及び前記第2燃焼排ガスの流量を制御する制御部を備えた、請求項1又は請求項2に記載の排ガス処理装置。
- 前記制御部は、前記第1発電設備及び前記第2発電設備の発電負荷に基づいて、前記統合排熱回収部に導入する前記第1燃焼排ガス及び前記第2燃焼排ガスの流量を制御する、請求項3に記載の排ガス処理装置。
- 前記制御部は、前記発電負荷として、前記第1発電設備及び前記第2発電設備の発電出力に基づいて、前記統合排熱回収部に導入する前記第1燃焼排ガス及び前記第2燃焼排ガスの流量を制御する、請求項4に記載の排ガス処理装置。
- 前記制御部は、前記発電負荷として、前記第1排ガス流路を流れる前記第1燃焼排ガスの流量、前記第2排ガス流路を流れる前記第2燃焼排ガスの流量及び前記排ガス排気流路を流れる前記排気燃焼排ガスの流量の少なくとも一つに基づいて、前記統合排熱回収部に導入する前記第1燃焼排ガス及び前記第2燃焼排ガスの流量を制御する、請求項4に記載の排ガス処理装置。
- 前記制御部は、前記発電負荷が所定の閾値以下となった際に、下記式(1)に基づいて算出される排ガス負荷に基づいて、前記統合排熱回収部に導入する前記第1燃焼排ガス及び前記第2燃焼排ガスの流量を制御する、請求項4から請求項6のいずれか1項に記載の排ガス処理装置。
排ガス負荷(%)=測定対象となる第1排ガス流路又は第2排ガス流路を流れる第1燃焼排ガス又は第2燃焼排ガスの流量/第1排ガス流路又は第2排ガス流路を流れる第1燃焼排ガス又は第2燃焼排ガスの定格流量×100・・・式(1) - 前記窒素酸化物除去部に導入される前記第1燃焼排ガス及び前記第2燃焼排ガスの流量を調整し、前記統合燃焼排ガスの温度を300℃以上400℃以下に制御する制御部を備えた、請求項1から請求項7のいずれか1項に記載の排ガス処理装置。
- 前記統合排熱回収部内に前記窒素酸化物除去部が設けられた、請求項1から請求項8のいずれか1項に記載の排ガス処理装置。
- 前記窒素酸化物除去部は、窒素酸化物を除去する窒素酸化物除去触媒と還元剤を注入する還元剤注入部とを備えた、請求項1から請求項9のいずれか1項に記載の排ガス処理装置。
- 前記CO2回収部に導入される統合燃焼排ガスのガス流量及び窒素酸化物濃度に基づいて、前記還元剤の供給量を制御する制御部を備えた、請求項10に記載の排ガス処理装置。
- 前記統合排熱回収部は、前記窒素酸化物を除去した前記統合燃焼排ガスの排熱によってCO2回収部から排出されたCO2を圧縮するCO2圧縮部駆動用蒸気を生成し、生成したCO2圧縮部駆動用蒸気をCO2圧縮部に供給する、請求項1から請求項11のいずれか1項に記載の排ガス処理装置。
- 前記統合排熱回収部は、前記窒素酸化物を除去した前記統合燃焼排ガスの排熱によってタービン駆動用蒸気を生成し、生成したタービン駆動用蒸気を蒸気タービンに供給する、請求項1から請求項12のいずれか1項に記載の排ガス処理装置。
- 前記窒素酸化物除去部に導入される前記統合燃焼排ガスの温度及びガス流量を測定し、測定した温度及びガス流量に基づいて、前記第1発電設備及び前記第2発電設備の燃焼器に供給する燃料の量及び前記蒸気タービンへの蒸気供給量の少なくとも一方を制御する制御部を備えた、請求項13に記載の排ガス処理装置。
- 前記第1発電設備及び前記第2発電設備の少なくとも一方が、既存発電設備を含む、請求項1から請求項14のいずれか1項に記載の排ガス処理装置。
- 第1発電設備及び第2発電設備の少なくとも一方の発電負荷が所定の閾値未満となった際に、当該発電負荷が所定の閾値より低くなった第1発電設備から排出される第1燃焼排ガス及び第2発電設備から排出される第2燃焼排ガスの少なくとも一部を外部に排出する燃焼排ガス排出工程と、
前記燃焼排ガス排出工程で少なくとも一部を外部に排出された前記第1燃焼排ガスと前記第2燃焼排ガスとを統合し統合燃焼排ガス中の窒素酸化物を除去する窒素酸化物除去工程と、
前記窒素酸化物除去工程で窒素酸化物を除去した前記統合燃焼排ガスの排熱を回収する統合排熱回収工程と、
前記統合排熱回収工程で排熱が回収された前記統合燃焼排ガス中のCO2をCO2回収液によって回収するCO2回収工程とを具備することを特徴とする、排ガス処理方法。
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