Carbon dioxide recovery equipment and carbon dioxide recovery method

Abstract

This carbon dioxide recovery equipment includes a gas turbine, a carbon dioxide capture device capable of capturing carbon dioxide from the atmosphere, and a heat medium line capable of guiding a heat medium generated by driving the gas turbine to the carbon dioxide capture device. The carbon dioxide capture device has an adsorbent capable of adsorbing carbon dioxide in the atmosphere and desorbing the adsorbed carbon dioxide by heating with the heat medium.

Description

Carbon dioxide recovery equipment and carbon dioxide recovery method

[0001] The present disclosure relates to carbon dioxide recovery equipment and a carbon dioxide recovery method. This application claims priority based on Japanese Patent Application No. 2024-180681 filed in Japan on October 16, 2024, and Japanese Patent Application No. 2024-199544 filed in Japan on November 15, 2024, and incorporates this content herein by reference.

[0002] In recent years, technologies for recovering carbon dioxide in the atmosphere have been studied for measures against global warming and the like. This technology is called DAC (Direct Air Capture).

[0003] Patent Document 1 below describes an apparatus for recovering carbon dioxide in the atmosphere. This apparatus includes an adsorbent capable of adsorbing carbon dioxide, a casing covering this adsorbent, and a fan for guiding air into this casing.

[0004] Japanese Patent Publication No. 2022-528676

[0005] In the technology described in Patent Document 1 above, driving power for a fan for guiding air to the adsorbent and a heat source for detaching carbon dioxide adsorbed on the adsorbent from the adsorbent are required. Also, since the proportion of carbon dioxide in the atmosphere is about 0.02 to 0.04%, installation of a large number of fans for guiding air to the adsorbent or enlargement of this fan is also required.

[0006] Therefore, an object of the present disclosure is to provide a technology for recovering carbon dioxide from the atmosphere with excellent economic efficiency.

[0007] A carbon dioxide recovery system in one embodiment for achieving the above objective comprises a gas turbine having a compressor capable of compressing air, a combustor capable of burning fuel in the compressed air compressed by the compressor to produce combustion gas, and a turbine driven by the combustion gas; a carbon dioxide recovery device capable of recovering carbon dioxide from the atmosphere; and a heat transfer medium line capable of guiding the heat transfer medium generated by driving the gas turbine to the carbon dioxide recovery device. The carbon dioxide recovery device has an adsorbent capable of adsorbing carbon dioxide from the atmosphere and releasing the adsorbed carbon dioxide by heating with the heat transfer medium.

[0008] In this embodiment, a heat transfer medium generated by driving a gas turbine is used as the heat transfer medium to heat the adsorbent in order to release carbon dioxide from the adsorbent. Therefore, in this embodiment, the heat source necessary to carry out the process of releasing carbon dioxide from the adsorbent can be obtained.

[0009] Another embodiment of a carbon dioxide capture system for achieving the above objectives includes a gas turbine having a compressor capable of compressing air, a combustor capable of burning fuel in the compressed air compressed by the compressor to produce combustion gas, and a turbine driven by the combustion gas; a carbon dioxide capture device capable of capturing carbon dioxide from the atmosphere, having electrically driven equipment; an extraction line through which the compressed air extracted from the gas turbine can flow; an auxiliary turbine connected to the extraction line and driven by the compressed air flowing through the extraction line; an auxiliary generator connected to the auxiliary turbine and capable of generating electricity by driving the auxiliary turbine; and a power line electrically connecting the auxiliary generator and the equipment.

[0010] In this embodiment, the output of the gas turbine can be reduced by extracting compressed air from it. Furthermore, in this embodiment, in order to reduce the output of the gas turbine, compressed air is extracted from the gas turbine and used to drive an auxiliary turbine, which in turn generates electricity with an auxiliary generator. In this embodiment, the electricity generated by this auxiliary generator is used to drive the equipment of the carbon dioxide capture device. Therefore, in this embodiment, power can be obtained to drive the equipment of the carbon dioxide capture device.

[0011] In one embodiment of a carbon dioxide recovery method for achieving the above objective, a recovery step is performed in which carbon dioxide is recovered from the atmosphere using a carbon dioxide recovery device having an adsorbent capable of adsorbing carbon dioxide, and a detachment step is performed in which a heat transfer medium is introduced into the carbon dioxide recovery device and the carbon dioxide adsorbed on the adsorbent is detached from the adsorbent. The heat transfer medium is generated by driving a gas turbine having a compressor capable of compressing air, a combustor capable of generating combustion gas by burning fuel in the compressed air compressed by the compressor, and a turbine that can be driven by the combustion gas.

[0012] In this embodiment, similar to the carbon dioxide capture equipment in the previous embodiment, a heat source necessary for carrying out the process of releasing carbon dioxide from the adsorbent can be obtained.

[0013] In another embodiment of a carbon dioxide recovery method for achieving the above objective, a recovery step is performed in which carbon dioxide from the atmosphere is recovered by adsorbing it onto an adsorbent material using a carbon dioxide recovery device having electrically driven equipment; a detachment step is performed in which a heat transfer medium is introduced into the carbon dioxide recovery device to detach the carbon dioxide adsorbed onto the adsorbent material from the adsorbent material; and a power generation step is performed in which compressed air is extracted from a gas turbine having a compressor capable of compressing air, a combustor capable of burning fuel in the compressed air compressed by the compressor to produce combustion gas, and a turbine capable of being driven by the combustion gas, and an auxiliary turbine is driven by the auxiliary turbine to generate electricity with an auxiliary generator. In the recovery step or the detachment step, the equipment is driven by the electricity generated in the power generation step.

[0014] In this embodiment, as with the carbon dioxide capture equipment in the other embodiments described above, the output of the gas turbine can be reduced. Furthermore, in this embodiment, as with the carbon dioxide capture equipment in the other embodiments described above, power can be obtained to drive the equipment of the carbon dioxide capture device.

[0015] One aspect of this disclosure provides a technology that is economically efficient in capturing carbon dioxide from the atmosphere.

[0016] This is a diagram of the carbon dioxide recovery equipment in the first embodiment of this disclosure. This is a flowchart showing the operation of the carbon dioxide recovery device in the first embodiment of this disclosure. This is a diagram of the carbon dioxide recovery equipment in the second embodiment of this disclosure. This is a diagram of the carbon dioxide recovery equipment in the third embodiment of this disclosure. This is a diagram of the carbon dioxide recovery equipment in the fourth embodiment of this disclosure.

[0017] The following describes various embodiments of the carbon dioxide capture equipment related to this disclosure and their modified forms with reference to the drawings.

[0018] "First Embodiment of Carbon Dioxide Capture Equipment" Hereinafter, the first embodiment of carbon dioxide capture equipment relating to this disclosure will be described with reference to Figures 1 and 2.

[0019] As shown in Figure 1, the carbon dioxide recovery equipment in this embodiment comprises a gas turbine 1, a waste heat utilization equipment 20 that can utilize the heat of the exhaust gas discharged from the gas turbine 1, a gas turbine generator 6 that can generate electricity by driving the gas turbine 1, an extraction equipment 30 that can extract a portion of the air inside the gas turbine 1 to the outside, an auxiliary power generation equipment 40, a power grid equipment 50, a carbon dioxide recovery device 60, a heat transfer medium line 70, and a control device 100.

[0020] The gas turbine 1 comprises a compressor 10 capable of compressing air A, a combustor 15 capable of generating combustion gas by burning fuel F in the compressed air compressed by the compressor 10, a fuel valve 5, a turbine 16 that can be driven by the high-temperature, high-pressure combustion gas, and an intermediate casing 3.

[0021] The compressor 10 includes a compressor rotor 11 that rotates around the rotor axis Ar, a compressor casing 12 that covers the compressor rotor 11, and an intake volume regulator 13. Here, the direction in which the rotor axis Ar extends is defined as the axial direction Da, and of the two sides of this axial direction Da, one side is defined as the upstream axial side Dau, and the other side as the downstream axial side Dad.

[0022] The compressor rotor 11 has a compressor rotor shaft 11s extending in the axial direction Da with respect to the rotor axis Ar, and a plurality of rotor blade rows 11b fixed to the compressor rotor shaft 11s. The plurality of rotor blade rows 11b are arranged in the axial direction Da. Each of the plurality of rotor blade rows 11b has a plurality of rotor blades arranged in the circumferential direction with respect to the rotor axis Ar. The intake volume regulator 13 has a plurality of inlet guide vanes (IGVs) 13v located within the compressor casing 12 and positioned axially upstream Dau of the plurality of rotor blade rows 11b, and a drive unit 13d that can change the orientation of each inlet guide vane 13v.

[0023] The turbine 16 is located downstream of the compressor 10's axis, on the Da side. This turbine 16 has a turbine rotor 17 that rotates around the rotor axis Ar by combustion gas from the combustor 15, and a turbine casing 18 that covers the turbine rotor 17.

[0024] The turbine rotor 17 has a turbine rotor shaft 17s extending in the axial direction Da with respect to the rotor axis Ar, and a plurality of rotor blade rows 17b fixed to this turbine rotor shaft 17s. The plurality of rotor blade rows 17b are arranged in the axial direction Da. Each of the plurality of rotor blade rows 17b has a plurality of rotor blades arranged in the circumferential direction with respect to the rotor axis Ar.

[0025] The turbine rotor 17 and the compressor rotor 11 are interconnected so as to be able to rotate together around the same rotor axis Ar, forming a gas turbine rotor 2. The rotor of the gas turbine generator 6 is connected to this gas turbine rotor 2.

[0026] The intermediate casing 3 is positioned in the axial direction Da between the compressor casing 12 and the turbine casing 18, connecting the compressor casing 12 and the turbine casing 18. Compressed air discharged from the compressor 10 flows into the intermediate casing 3. The combustor 15 is fixed to the intermediate casing 3. A fuel line 4 is connected to the combustor 15. The fuel line 4 is provided with the aforementioned fuel valve 5, which adjusts the flow rate of the fuel F flowing through the fuel line 4.

[0027] The waste heat utilization equipment 20 includes a waste heat recovery boiler 21, an exhaust duct 22, a chimney 23, a steam turbine 24 that can be driven by steam from the waste heat recovery boiler 21, a main steam line 25 that can guide steam generated in the waste heat recovery boiler 21 to the steam turbine 24, a condenser 26 that returns the steam exhausted from the steam turbine 24 back into water, a feedwater line 27 that can guide the water in the condenser 26 to the waste heat recovery boiler 21, and a feedwater pump 28 provided in the feedwater line 27. The rotor of the steam turbine 24 is connected to a drive object that can be rotated by the rotation of the rotor. Examples of such drive objects include the rotor of a gas turbine generator 6, the rotor of an ST generator independent of the gas turbine generator 6, and the impeller of a pump.

[0028] The waste heat recovery boiler 21 generates steam by evaporating water using the heat from the exhaust gas, which is the combustion gas exhausted from the turbine 16. This waste heat recovery boiler 21 has a boiler casing 21c connected to the turbine casing 18 and heat transfer tubes 21t arranged inside the boiler casing 21c. The exhaust gas from the turbine 16 flows through the boiler casing 21c. Liquid water or gaseous water flows through the heat transfer tubes 21t. One end of the heat transfer tubes 21t forms a water inlet and is connected to the feedwater line 27. The other end of the heat transfer tubes 21t forms a steam outlet and is connected to the main steam line 25. The chimney 23 is connected to the boiler casing 21c of the waste heat recovery boiler 21 via an exhaust duct 22.

[0029] The extraction equipment 30 includes an extraction line 31 that allows extraction of a portion of the compressed air generated by the compressor 10 as extracted air from the gas turbine 1, an extraction valve 32, and an auxiliary turbine 33 that can be driven by the extracted air flowing through the extraction line 31.

[0030] The auxiliary turbine 33 includes a rotatable auxiliary turbine rotor 34 and an auxiliary turbine casing 35 that covers the auxiliary turbine rotor 34. One end of the extraction line 31 is connected to the intermediate casing 3 of the gas turbine 1. The other end of the extraction line 31 is connected to the auxiliary turbine casing 35. Therefore, a portion of the compressed air that flows into the intermediate casing 3 can flow into the auxiliary turbine casing 35 as extracted air via the extraction line 31. The auxiliary turbine rotor 34 rotates due to the extracted air that flows into the auxiliary turbine casing 35. An extraction valve 32 is provided in the extraction line 31. This extraction valve 32 can adjust the flow rate of extracted air flowing through the extraction line 31.

[0031] The auxiliary power generation equipment 40 includes a transmission 42, a clutch 43, an auxiliary generator 41, and an energy storage device 45.

[0032] The transmission 42 functions as a speed reducer that reduces the rotation of the auxiliary turbine rotor 34. The clutch 43 can switch between a disengaged state, where the driving force from the transmission 42 is not transmitted to the rotor of the auxiliary generator 41, and an engaged state, where the driving force from the transmission 42 is transmitted to the rotor of the auxiliary generator 41.

[0033] In this embodiment, both the auxiliary generator 41 and the gas turbine generator 6 are synchronous generators.

[0034] The energy storage device 45 includes a battery 46 and an AC / DC converter 47. The AC / DC converter 47 can convert AC power from an external source into DC power and send it to the battery 46, and can also convert DC power from the battery 46 into AC power and send it to the outside.

[0035] The carbon dioxide recovery device 60 is a device for recovering carbon dioxide CO2 from the atmosphere A. This carbon dioxide recovery device 60 includes a duct 61 through which the atmosphere A can flow, an adsorbent 62 capable of adsorbing carbon dioxide CO2 from the atmosphere A, an inlet fan 63f, an outlet fan 64f, an inlet damper 66i, an outlet damper 66o, a suction line 67, a suction valve 68, a drain tank 69, and a vacuum pump 65p.

[0036] The duct 61 has an inlet 61i into which atmospheric air A can be introduced, and an outlet 61o into which atmospheric air A can be discharged. The adsorbent 62 is placed inside this duct 61. The adsorbent 62 is formed, for example, of an amine-supported porous material. Therefore, the carbon dioxide recovery device 60 in this embodiment is an S-DAC (Direct Air Capture) type carbon dioxide recovery device 60 that uses a solid adsorbent 62. In this embodiment, the adsorbent 62 can release adsorbed carbon dioxide CO2 in a temperature environment of 100°C or less. The inlet fan 63f and the outlet fan 64f are both fans that can guide atmospheric air A into the duct 61 and discharge it outside the duct 61. The inlet fan 63f is located inside the duct 61 and is provided on the inlet 61i side of the duct 61 with respect to the adsorbent 62. The outlet fan 64f is located inside the duct 61 and is provided on the outlet 61o side of the duct 61 with respect to the adsorbent 62. The inlet damper 66i and the outlet damper 66o are both dampers capable of stopping the flow of atmospheric air A within the duct 61. The inlet damper 66i is located inside the duct 61, between the adsorbent material 62 and the inlet fan 63f. The outlet damper 66o is located inside the duct 61, between the adsorbent material 62 and the outlet fan 64f.

[0037] The suction line 67 is connected to the duct 61 so that it can draw in gas from the duct 61. The suction valve 68, drain tank 69, and vacuum pump 65p are all located within this suction line 67. The drain tank 69 is located in the suction line 67 on the duct 61 side of the vacuum pump 65p. The suction valve 68 is located in the suction line 67 on the duct 61 side of the drain tank 69.

[0038] The inlet fan 63f, outlet fan 64f, and vacuum pump 65p are all driven by electric motors 63m, 64m, and 65m. The inlet fan 63f and the electric motor 63m that drives the inlet fan 63f constitute equipment 63. The outlet fan 64f and the electric motor 64m that drives the outlet fan 64f constitute equipment 64. The vacuum pump 65p and the electric motor 65m that drives the vacuum pump 65p constitute equipment 65.

[0039] The heat transfer medium line 70 is a line capable of guiding the heat transfer medium generated by the operation of the gas turbine 1 to the carbon dioxide recovery device 60. Specifically, in this embodiment, the heat transfer medium line 70 is capable of guiding a portion of the exhaust gas discharged from the gas turbine 1, which has passed through the waste heat recovery boiler 21, to the carbon dioxide recovery device 60 as a heat transfer medium. One end of this heat transfer medium line 70 is connected to the exhaust duct 22, and the other end of this heat transfer medium line 70 is connected to the duct 61 of the carbon dioxide recovery device 60. The heat transfer medium line 70 is provided with a heat transfer medium valve 71 that can adjust the flow rate of the exhaust gas flowing through the heat transfer medium line 70.

[0040] The power system equipment 50 includes a dedicated power line 51g for the GT generator, a dedicated power line 51a for the AT generator, a dedicated power line 51b for the BESS, a shared power line 51s within the plant, a dedicated power line 51f for the fan, a dedicated power line 51p for the pump, an external connection power line 51c, a plurality of transformers 53a, 53b, 53c, 53g, and a plurality of switches 54a, 54b, 54c, 54g, 54f, 54p. The dedicated power line 51g for the GT generator has one end electrically connected to the gas turbine generator 6 and the other end electrically connected to the shared power line 51s within the plant. The dedicated power line 51a for the AT generator has one end electrically connected to the auxiliary generator 41 and the other end electrically connected to the shared power line 51s within the plant. The dedicated power line 51b for the BESS has one end electrically connected to the energy storage device 45 and the other end connected to the shared power line 51s within the plant. The fan-dedicated power line 51f has one end electrically connected to the electric motor 63m of the inlet fan 63f and the electric motor 64m of the outlet fan 64f, and the other end is connected to the plant's shared power line 51s. The pump-dedicated power line 51p has one end electrically connected to the electric motor 65m of the vacuum pump 65p, and the other end is connected to the plant's shared power line 51s. The external connection power line 51c electrically connects the plant's shared power line 51s to the external power system 59. The external connection power line 51c, the plant's shared power line 51s, and the fan-dedicated power line 51f together constitute a power line that electrically connects the external power system 59 to the electric motor 63m of the inlet fan 63f and the electric motor 64m of the outlet fan 64f. Furthermore, the external power line 51c, the shared power line 51s within the plant, and the dedicated power line 51p for the pump constitute power lines that electrically connect the external power system 59 and the electric motor 65m of the vacuum pump 65p.

[0041] A transformer 53g and a switch 54g are provided on the GT generator's dedicated power line 51g. Furthermore, an output meter 55 that detects the amount of power generated by the gas turbine generator 6, in other words, the actual output PWr which is the actual output of the gas turbine 1, is connected to this GT generator's dedicated power line 51g. A transformer 53a and a switch 54a are provided on the AT generator's dedicated power line 51a. A transformer 53b and a switch 54b are provided on the BESS's dedicated power line 51b. A transformer 53c and a switch 54c are also provided on the external connection power line 51c. A switch 54f is provided on the fan's dedicated power line 51f. A switch 54p is provided on the pump's dedicated power line 51p. All of the above switches 54a, 54b, 54c, 54g, 54f, and 54p have a first terminal, a second terminal, and a switching mechanism. The switching mechanism can change the connection state between the first and second terminals, from an ON state where the first and second terminals are electrically connected to an OFF state where the first and second terminals are not electrically connected. For example, the switch 54b installed on the BESS dedicated power line 51b can achieve an ON state where the external power system 59, the auxiliary generator 41, and the storage battery 46 are electrically connected, and an OFF state where the external power system 59, the auxiliary generator 41, and the storage battery 46 are not electrically connected.

[0042] The control device 100 includes a main controller 101, a GT (gas turbine) controller 102, an extraction controller 104, a switch controller 105, and a DAC controller 106.

[0043] The main controller 101 receives various plant-related instructions from the outside, including the requested output PWc required for the gas turbine 1, as well as the actual output PWr detected by the output meter 55, and controls the other controllers.

[0044] The GT controller 102 determines the opening degree of the fuel valve 5 based on the aforementioned request output PWc. The GT controller 102 then instructs the fuel valve 5 to this opening degree. The GT controller 102 also receives the actual output PWr from the main controller 101 and determines the IGV opening degree θ according to this actual output PWr. The GT controller 102 then instructs the intake volume regulator 13 to this IGV opening degree θ.

[0045] The air extraction controller 104 receives the actual output Pwr from the main controller 101, and instructs the opening and closing of the air extraction valve 32 according to whether the actual output Pwr satisfies the air extraction condition. Here, the air extraction condition is that the actual output Pwr detected by the output meter 55 is below a predetermined air extraction output.

[0046] The opening / closing controller 105 controls each of the opening / closing devices 54a, 54b, 54c, 54g, 54f, 54p. When an emergency situation inconvenient for the plant occurs, the opening / closing controller 105 instructs the opening / closing devices 54a, 54b, 54c, 54g, 54f, 54p corresponding to this emergency situation to be in an off state. Further, the opening / closing controller 105 instructs the opening / closing device 54b provided on the BESS dedicated power line 51b to be in an on state or an off state according to whether the air extraction valve 32 is open or closed, and further according to the discharge condition described later. The opening / closing controller 105 instructs the opening / closing device 54b to be in an on state when the discharge condition is satisfied and the air extraction valve 32 is open. Also, the opening / closing controller 105 instructs the opening / closing device 54b to be in an off state when the discharge condition is not satisfied and the air extraction valve 32 is not open.

[0047] The DAC controller 106 controls the carbon dioxide recovery device 60. Specifically, the DAC controller 106 controls the opening degree of the heat medium valve 71, the opening degree of the inlet damper 66i, and the opening degree of the outlet damper 66o. Further, the DAC controller 106 controls the driving of the inlet fan 63f, the driving of the outlet fan 64f, and the driving of the vacuum pump 65p via the opening / closing controller 105.

[0048] Next, the operations of the gas turbine 1, the air extraction facility 30, and the auxiliary power generation facility 40 will be described.

[0049] First, the main controller 101 determines whether to execute main power generation for driving the gas turbine 1 to generate power in the gas turbine generator 6. When the main controller 101 determines to execute main power generation, the main controller 101 instructs the GT controller 102 to execute control of the fuel flow rate and also instructs the GT controller 102 to execute control of the intake air flow rate of the gas turbine 1.

[0050] The GT controller 102 determines the opening degree of the fuel valve 5 based on the external request output PWc and instructs the fuel valve 5 to this opening degree. The GT controller 102 also receives the actual output PWr from the main controller 101 and determines the IGV opening degree θ according to this actual output PWr. The GT controller 102 then instructs the intake air volume regulator 13 to this IGV opening degree θ.

[0051] By controlling the fuel flow rate and intake air flow rate as described above, the gas turbine 1 is driven and the gas turbine generator 6 generates electricity.

[0052] If the requested output PWc from an external source is less than or equal to the rated output and greater than the aforementioned extraction output, the extraction valve 32 is closed, the clutch 43 is disengaged, and the switch 54b on the BESS dedicated power line 51b is in the off state. In this case, the gas turbine generator 6 outputs power corresponding to the requested output PWc. Also, because the extraction valve 32 is closed, compressed air in the intermediate casing 3 is not supplied to the auxiliary turbine 33 via the extraction line 31, and the auxiliary turbine 33 is not driven. Furthermore, because the switch 54b on the BESS dedicated power line 51b is in the off state, no power is input or output to the energy storage device 45. In other words, the energy storage device 45 is not charged with power, and the energy storage device 45 does not discharge.

[0053] Therefore, in this case, power corresponding to the requested output PWc is supplied from the plant to the external power system 59.

[0054] The extraction controller 104 determines whether the extraction conditions are met for extracting a portion of the compressed air in the intermediate casing 3 as extraction air. As mentioned above, these extraction conditions are that the actual output PWr detected by the output meter 55 is less than or equal to the extraction output. When the extraction controller 104 determines that the extraction conditions are met, it instructs the extraction valve 32 to open. As a result, the extraction valve 32 opens, and a portion of the compressed air in the intermediate casing 3 is supplied to the auxiliary turbine 33 as extraction air via the extraction line 31. The auxiliary turbine 33 starts to drive due to the inflow of this extraction air. The driving force of the auxiliary turbine 33 is transmitted to the auxiliary generator 41, and the auxiliary generator 41 starts generating electricity.

[0055] The switchgear controller 105, seeing that the extraction valve 32 has opened, instructs the switch 54b, which is installed on the BESS dedicated power line 51b, to turn ON. As a result, the switch 54b turns ON, and the electricity generated by the auxiliary generator 41 charges the energy storage device 45.

[0056] If the extraction controller 104 determines that the extraction conditions are not met, it instructs the extraction valve 32 to close. Based on this instruction, if the extraction valve 32 is open, it will close, and if the extraction valve 32 is closed, it will remain closed.

[0057] Furthermore, if the extraction controller 104 determines that the extraction conditions are not met, the switchgear controller 105 determines whether the discharge conditions are met. Here, the discharge conditions are that the requested output PWc is greater than or equal to the discharge output which is greater than the rated output of the gas turbine 1, and that the amount of change of the requested output PWc per unit time is greater than a predetermined value. Receiving a carbon dioxide recovery instruction from the DAC controller 106 is also included in the discharge conditions. If the switchgear controller 105 determines that the discharge conditions are met, it instructs the switch 54b installed on the BESS dedicated power line 51b to turn ON. As a result, the switch 54b turns ON, and the power stored in the energy storage device 45 is discharged.

[0058] When the switchgear controller 105 determines that the discharge conditions are not met, it instructs the switch 54b, which is installed on the BESS dedicated power line 51b, to turn off. As a result, the switch 54b turns off, and the power stored in the energy storage device 45 is no longer discharged.

[0059] Next, we will explain the operation of the carbon dioxide capture device 60.

[0060] The main controller 101 determines whether or not to recover carbon dioxide (CO2) from the atmosphere A. Specifically, the main controller 101 determines to recover carbon dioxide (CO2) from the atmosphere A when, for example, the operator instructs it to recover carbon dioxide (CO2) or when it is time for carbon dioxide (CO2) recovery.

[0061] When the main controller 101 determines that carbon dioxide (CO2) should be recovered, it outputs a carbon dioxide recovery instruction to the DAC controller 106. Upon receiving this instruction, the DAC controller 106 outputs an open instruction to the inlet damper 66i and the outlet damper 66o. As a result, the inlet damper 66i and the outlet damper 66o open, allowing atmospheric air A to flow into the duct 61 of the carbon dioxide recovery device 60. Furthermore, as described above, the DAC controller 106 outputs a carbon dioxide recovery instruction to the switch controller 105. Upon receiving this instruction, the switch controller 105 instructs the switch 54b, located on the BESS dedicated power line 51b, to turn on. Upon receiving this instruction, the switch controller 105 further instructs the switch 54f, located on the fan dedicated power line 51f, to turn on. As a result, this switch 54b turns on, and the power stored in the energy storage device 45 is discharged. Furthermore, the switch 54f is turned ON, and the power discharged from the energy storage device 45 is supplied to the electric motor 63m of the inlet fan 63f and the electric motor 64m of the outlet fan 64f, driving the inlet fan 63f and the outlet fan 64f. As a result, air A flows into the duct 61 from the inlet 61i of the carbon dioxide recovery device 60, and carbon dioxide CO2 in this air A is adsorbed by the adsorbent material 62. The air A that has passed through the adsorbent material 62 is discharged outside the duct 61 from the outlet 61o of the duct 61.

[0062] As described above, when the main controller 101 determines that carbon dioxide CO2 should be recovered, the carbon dioxide recovery device 60 is activated by an instruction from the DAC controller 106, as shown in the flowchart in Figure 2, and carbon dioxide CO2 from the atmosphere A is recovered by this carbon dioxide recovery device 60 (recovery process S3).

[0063] As described above, if the actual output PWr detected by the output meter 55 is less than or equal to the extraction output, the auxiliary generator 41 generates power (power generation process S1). The power generated by this auxiliary generator 41 is charged to the energy storage device 45 (charging process S2). In the charging process S2, power from the external power system 59 may also be used to charge the energy storage device 45. In the recovery process S3, the power charged to the energy storage device 45 in the charging process S2 is used to drive the inlet fan 63f and the outlet fan 64f, causing atmospheric air A to flow into the duct 61 of the carbon dioxide recovery device 60. If the auxiliary generator 41 is generating power during the recovery process S3, the power generated by this auxiliary generator 41 is directly supplied to the electric motor 63m of the inlet fan 63f and the electric motor 64m of the outlet fan 64f. In addition, in the recovery process S3, power from the external power system 59 may be used to drive the electric motor 63m of the inlet fan 63f and the electric motor 64m of the outlet fan 64f.

[0064] The main controller 101 determines whether or not to stop the recovery of carbon dioxide (CO2). Specifically, the main controller 101 decides to stop the recovery of carbon dioxide (CO2) from the atmosphere A if, for example, the operator instructs it to stop the recovery of carbon dioxide (CO2), or if it is outside the carbon dioxide (CO2) recovery time slot.

[0065] When the main controller 101 determines that carbon dioxide (CO2) recovery should be stopped, it outputs a recovery stop instruction to the DAC controller 106. Upon receiving this instruction, the DAC controller 106 outputs a recovery stop instruction to the switchgear controller 105. Upon receiving this instruction, the switchgear controller 105 instructs the switch 54b on the BESS dedicated power line 51b and the switch 54f on the fan dedicated power line 51f to turn off. As a result, the switch 54b turns off, and the power stored in the energy storage device 45 is no longer discharged. Furthermore, the power generated by the auxiliary generator 41, or the power stored in the energy storage device 45, is no longer supplied to the electric motor 63m of the inlet fan 63f and the electric motor 64m of the outlet fan 64f, causing the inlet fan 63f and the outlet fan 64f to stop. As a result, atmospheric air A no longer flows into the duct 61 of the carbon dioxide recovery device 60.

[0066] The main controller 101 determines whether or not to release carbon dioxide CO2 from the adsorbent 62. Specifically, the main controller 101 determines to release carbon dioxide CO2 from the adsorbent 62 if, for example, the total time since the release of carbon dioxide CO2 from the adsorbent 62 to the recovery process S3 has elapsed beyond a predetermined recovery limit time and the gas turbine 1 is running. The recovery limit time is the total time since the release of carbon dioxide CO2 from the adsorbent 62 to the recovery process S3, and is the time during which the carbon dioxide CO2 adsorption performance of the adsorbent 62 is expected to decrease.

[0067] When the main controller 101 determines that carbon dioxide CO2 should be released from the adsorbent 62, it outputs a carbon dioxide release instruction to the DAC controller 106. Upon receiving this instruction, the DAC controller 106 outputs an open instruction to the heat transfer valve 71 and a close instruction to the inlet damper 66i and outlet damper 66o. As a result, the heat transfer valve 71 opens, allowing a portion of the exhaust gas that has been exhausted from the gas turbine 1 and passed through the waste heat recovery boiler 21 to flow into the duct 61 of the carbon dioxide recovery device 60 via the heat transfer line 70. In addition, the inlet damper 66i and outlet damper 66o close, preventing atmospheric air A from flowing into the duct 61 of the carbon dioxide recovery device 60. Therefore, the adsorbent 62 in the duct 61 is heated by the exhaust gas, and carbon dioxide CO2 is released from the adsorbent 62. Furthermore, the DAC controller 106 instructs the suction valve 68 to open. As a result, the suction valve 68 opens, allowing the gas in the duct 61 to flow into the suction line 67. Furthermore, the DAC controller 106 outputs a carbon dioxide release instruction to the switch controller 105. Upon receiving this instruction, the switch controller 105 instructs the switch 54b, located on the BESS dedicated power line 51b, and the switch 54p, located on the pump dedicated power line 51p, to turn on. As a result, the switch 54b turns on, and the power stored in the energy storage device 45 is discharged. Furthermore, the switch 54p turns on, and the power discharged from the energy storage device 45 is supplied to the electric motor 65m of the vacuum pump 65p, driving the vacuum pump 65p. Driven by this vacuum pump 65p, the carbon dioxide CO2 released from the adsorbent 62 is sucked from inside the duct 61 and stored in a tank via the suction line 67 (release process S4). In addition, during the detachment process S4, the electric motor 65m of the vacuum pump 65p may be driven by power from the external power system 59.

[0068] The main controller 101 determines whether or not to terminate the detachment process S4. Specifically, the main controller 101 determines to terminate the detachment process S4 if, for example, the execution time of the detachment process S4 has elapsed to a predetermined time.

[0069] When the main controller 101 determines that the detachment process S4 is complete, it outputs a detachment cancellation instruction to the DAC controller 106. Upon receiving this instruction, the DAC controller 106 outputs a close instruction to the heat transfer valve 71 and the suction valve 68, and an open instruction to the inlet damper 66i and the outlet damper 66o. As a result, the heat transfer valve 71 is closed, preventing exhaust gas from the gas turbine 1 from flowing into the duct 61. In addition, the inlet damper 66i and the outlet damper 66o are opened, allowing atmospheric air A to flow into the duct 61 of the carbon dioxide recovery device 60. Furthermore, the DAC controller 106 outputs a detachment cancellation instruction to the switch / switch controller 105. Upon receiving this instruction, the switch / switch controller 105 instructs the switch 54b on the BESS dedicated power line 51b and the switch 54p on the pump dedicated power line 51p to turn off. As a result, switches 54b and 54p are turned off, power is no longer supplied to the electric motor 65m of the vacuum pump 65p, and the vacuum pump 65p stops.

[0070] As described above, in this embodiment, in order to suppress the output of the gas turbine 1, compressed air is extracted from the gas turbine 1, and this compressed air is used to drive the auxiliary turbine 33, which in turn generates electricity with the auxiliary generator 41. In the recovery process S3, the electricity generated by the auxiliary generator 41 is used to drive the inlet fan 63f and the outlet fan 64f. Therefore, in this embodiment, the driving power necessary for executing the recovery process S3 can be obtained.

[0071] Furthermore, in this embodiment, the exhaust gas that is discharged from the gas turbine 1, passes through the waste heat recovery boiler 21, and would normally be discharged from the chimney 23, is used as a heat transfer medium to heat the adsorbent 62 in the detachment process S4. In addition, in this embodiment, the electricity generated by the auxiliary generator 41 is used to drive the vacuum pump 65p in the detachment process S4. Thus, in this embodiment, the heat source and driving power necessary for executing the detachment process S4 can be obtained.

[0072] In other words, this embodiment offers superior economic efficiency in terms of capturing carbon dioxide from the atmosphere.

[0073] "Second Embodiment of Carbon Dioxide Capture Equipment" Hereinafter, the second embodiment of the carbon dioxide capture equipment relating to this disclosure will be described with reference to Figure 3.

[0074] The carbon dioxide recovery equipment in this embodiment differs from the carbon dioxide recovery equipment in the first embodiment only in the heat transfer medium line. The heat transfer medium flowing through the heat transfer medium line 70a of the carbon dioxide recovery equipment in this embodiment is compressed air extracted from the gas turbine 1. Therefore, one end of the heat transfer medium line 70a in this embodiment is connected to the intermediate casing 3 of the gas turbine 1, and the other end of the heat transfer medium line 70a is connected to the duct 61 of the carbon dioxide recovery device 60. The heat transfer medium line 70a in this embodiment is also provided with a heat transfer medium valve 71a that can adjust the flow rate of the heat transfer medium flowing through it.

[0075] The carbon dioxide recovery device 60 in this embodiment also performs a recovery step S3 and a detachment step S4, similar to the carbon dioxide recovery device 60 in the first embodiment described according to the flowchart shown in Figure 2. However, in the detachment step S4 in this embodiment, compressed air extracted from the gas turbine 1 is used as the heat transfer medium for detaching carbon dioxide CO2 from the adsorbent 62. Therefore, the execution of the detachment step S4 in this embodiment is conditional on the gas turbine 1 being in operation.

[0076] In this embodiment as well, in order to suppress the output of the gas turbine 1, compressed air is extracted from the gas turbine 1, and this compressed air is used to drive the auxiliary turbine 33, which in turn generates electricity with the auxiliary generator 41. In the recovery process S3, the electricity generated by the auxiliary generator 41 is used to drive the inlet fan 63f and the outlet fan 64f. Therefore, in this embodiment as well, the drive power necessary to perform the recovery process S3 can be obtained.

[0077] Furthermore, in this embodiment, in order to suppress the output of the gas turbine 1, compressed air is extracted from the gas turbine 1 and this compressed air is used as a heat transfer medium to heat the adsorbent 62 in the detachment process S4. In addition, in this embodiment, in the detachment process S4, the electricity generated by the auxiliary generator 41 is used to drive the vacuum pump 65p. Therefore, in this embodiment as well, the heat source and driving power necessary for executing the detachment process S4 can be obtained.

[0078] In other words, this embodiment also offers excellent economic efficiency in terms of capturing carbon dioxide from the atmosphere.

[0079] "Third Embodiment of Carbon Dioxide Capture Equipment" Hereinafter, the third embodiment of the carbon dioxide capture equipment relating to this disclosure will be described with reference to Figure 4.

[0080] The carbon dioxide recovery equipment in this embodiment differs from the carbon dioxide recovery equipment in the first embodiment only in the extraction equipment and the heat transfer medium line. The extraction equipment 30b of the carbon dioxide recovery equipment in this embodiment is provided in the extraction line 31 and includes a boiler 39 capable of generating steam using the heat of the compressed air flowing through the extraction line 31. The heat transfer medium flowing through the heat transfer medium line 70b of the carbon dioxide recovery equipment in this embodiment is the steam generated by this boiler 39. Therefore, one end of the heat transfer medium line 70b in this embodiment is connected to the boiler 39, and the other end of the heat transfer medium line 70b is connected to the duct 61 of the carbon dioxide recovery device 60. The heat transfer medium line 70b in this embodiment is also provided with a heat transfer medium valve 71b that can adjust the flow rate of the heat transfer medium flowing through it.

[0081] The carbon dioxide recovery device 60 in this embodiment also performs a recovery process S3 and a detachment process S4, similar to the carbon dioxide recovery device 60 in the first embodiment described according to the flowchart shown in Figure 2. However, in the detachment process S4 in this embodiment, steam generated by the heat of compressed air extracted from the gas turbine 1 is used as the heat transfer medium for detaching carbon dioxide CO2 from the adsorbent 62. Therefore, the execution of the detachment process S4 in this embodiment is conditional on the gas turbine 1 being in operation.

[0082] In this embodiment as well, in order to suppress the output of the gas turbine 1, compressed air is extracted from the gas turbine 1, and this compressed air is used to drive the auxiliary turbine 33, which in turn generates electricity with the auxiliary generator 41. In the recovery process S3, the electricity generated by the auxiliary generator 41 is used to drive the inlet fan 63f and the outlet fan 64f. Therefore, in this embodiment as well, the drive power necessary to perform the recovery process S3 can be obtained.

[0083] Furthermore, in this embodiment, in order to suppress the output of the gas turbine 1, compressed air is extracted from the gas turbine 1, and steam is generated using the heat of this compressed air. This steam is then used as a heat transfer medium to heat the adsorbent 62 in the detachment process S4. In addition, in this embodiment, the electricity generated by the auxiliary generator 41 is used to drive the vacuum pump 65p in the detachment process S4. Therefore, in this embodiment as well, the heat source and driving power necessary for executing the detachment process S4 can be obtained.

[0084] In other words, this embodiment also offers excellent economic efficiency in terms of capturing carbon dioxide from the atmosphere.

[0085] "Fourth Embodiment of the Carbon Dioxide Capture System" Hereinafter, the fourth embodiment of the carbon dioxide capture system related to this disclosure will be described with reference to Figure 5.

[0086] The carbon dioxide recovery equipment in this embodiment differs from the carbon dioxide recovery equipment in the first embodiment only in the heat transfer medium line. The heat transfer medium flowing through the heat transfer medium line 70c of the carbon dioxide recovery equipment in this embodiment is steam generated by the waste heat recovery boiler 21 and has passed through the steam turbine 24. Therefore, one end of the heat transfer medium line 70c in this embodiment is connected to the steam turbine 24, and the other end of the heat transfer medium line 70 is connected to the duct 61 of the carbon dioxide recovery device 60. In addition, the heat transfer medium line 70c in this embodiment is also provided with a heat transfer medium valve 71c that can adjust the flow rate of the heat transfer medium flowing through it.

[0087] The carbon dioxide recovery device 60 in this embodiment also performs a recovery process S3 and a detachment process S4, similar to the carbon dioxide recovery device 60 in the first embodiment described according to the flowchart shown in Figure 2. However, in the detachment process S4 in this embodiment, steam that has passed through the steam turbine 24 is used as the heat transfer medium for detaching carbon dioxide CO2 from the adsorbent 62. Therefore, the execution of the detachment process S4 in this embodiment is conditional on the waste heat recovery boiler 21 generating steam.

[0088] In this embodiment as well, in order to reduce the output of the gas turbine 1, compressed air is extracted from the gas turbine 1, and this compressed air is used to drive the auxiliary turbine 33, which in turn generates electricity with the auxiliary generator 41. In the recovery process S3, the electricity generated by the auxiliary generator 41 is used to drive the inlet fan 63f and the outlet fan 64f. Therefore, in this embodiment as well, the running costs required to perform the recovery process S3 can be reduced.

[0089] Furthermore, in this embodiment, the steam that has passed through the steam turbine 24 is used as a heat transfer medium to heat the adsorbent 62 in the detachment process S4. In addition, in this embodiment, the electricity generated by the auxiliary generator 41 is used to drive the vacuum pump 65p in the detachment process S4. Therefore, in this embodiment as well, the running costs required to perform the detachment process S4 can be reduced.

[0090] In other words, this embodiment also offers excellent economic efficiency in terms of capturing carbon dioxide from the atmosphere.

[0091] "Modifications" In each of the above embodiments, the carbon dioxide recovery device 60 has an inlet fan 63f and an outlet fan 64f that guide the atmosphere A into the duct 61. However, the carbon dioxide recovery device 60 may have only one of the inlet fan 63f and the outlet fan 64f.

[0092] The carbon dioxide capture equipment in each of the above embodiments includes a power storage device 45. However, this power storage device 45 may be omitted. In this case, the power stored in the power storage device 45 cannot be used to drive the inlet fan 63f, outlet fan 64f, and vacuum pump 65p, so carbon dioxide capture and carbon dioxide release are only possible when the auxiliary generator 41 is running.

[0093] The carbon dioxide recovery equipment in each of the above embodiments is equipped with a waste heat utilization equipment 20. However, the carbon dioxide recovery equipment in the first, second, and third embodiments does not need to be equipped with a waste heat utilization equipment 20.

[0094] The carbon dioxide recovery apparatus 60 in each of the above embodiments is an S-DAC (Direct Air Capture) type carbon dioxide recovery apparatus that uses a solid adsorbent 62. However, the carbon dioxide recovery apparatus may also be an L-DAC (Direct Air Capture) type carbon dioxide recovery apparatus that uses a liquid adsorbent. In the case of an L-DAC (Direct Air Capture) type carbon dioxide recovery apparatus, for example, an amine aqueous solution is used as the adsorbent. This apparatus has an absorption tower in which the amine aqueous solution is stored, a regeneration tower for regenerating the amine aqueous solution that has absorbed carbon dioxide, a pump for sending the amine aqueous solution that has absorbed carbon dioxide from the absorption tower to the regeneration tower, and a pump for returning the regenerated amine aqueous solution to the absorption tower. A heat transfer medium is used to heat the amine aqueous solution that has absorbed carbon dioxide in the regeneration tower. The electricity generated by the auxiliary generator 41 is used to drive the electric motors of each pump in this apparatus.

[0095] Furthermore, this disclosure is not limited to the embodiments and modifications described above. Various additions, modifications, substitutions, and partial deletions are possible, without departing from the conceptual idea and spirit of the present invention derived from the claims and their equivalents.

[0096] "Note" The carbon dioxide capture equipment in the above embodiments and modifications can be understood, for example, as follows:

[0097] (1) The carbon dioxide recovery equipment in the first embodiment comprises a gas turbine 1 having a compressor 10 capable of compressing air A, a combustor 15 capable of burning fuel F in the compressed air compressed by the compressor 10 to generate combustion gas, and a turbine 16 that can be driven by the combustion gas; a carbon dioxide recovery device 60 capable of recovering carbon dioxide CO2 from the atmosphere A; and heat transfer medium lines 70, 70a, 70b, 70c that can guide the heat transfer medium generated by driving the gas turbine 1 to the carbon dioxide recovery device 60. The carbon dioxide recovery device 60 has an adsorbent 62 capable of adsorbing carbon dioxide CO2 from the atmosphere A and releasing the adsorbed carbon dioxide CO2 by heating with the heat transfer medium.

[0098] In this embodiment, a heat transfer medium generated by the operation of the gas turbine 1 is used as a heat transfer medium to heat the adsorbent 62 in order to release carbon dioxide CO2 from the adsorbent 62. Therefore, in this embodiment, a heat source necessary for carrying out the process of releasing carbon dioxide CO2 from the adsorbent 62 can be obtained.

[0099] (2) The carbon dioxide recovery equipment in the second embodiment is such that, in the carbon dioxide recovery equipment in the first embodiment, the heat transfer medium line 70 can guide the exhaust gas exhausted from the gas turbine 1 to the carbon dioxide recovery device 60 as the heat transfer medium.

[0100] The exhaust gas discharged from the gas turbine 1 has a lower energy level than the combustion gas flowing from the combustor 15 into the turbine 16. In this embodiment, this exhaust gas is used as a heat transfer medium. Therefore, in this embodiment, the running costs required to carry out the process of removing carbon dioxide CO2 from the adsorbent 62 can be reduced.

[0101] (3) The carbon dioxide recovery equipment in the third embodiment is equipped with a waste heat recovery boiler 21 capable of generating steam using the heat of the exhaust gas discharged from the gas turbine 1, as in the carbon dioxide recovery equipment in the second embodiment. The heat transfer medium line 70 can guide the exhaust gas that has passed through the waste heat recovery boiler 21 to the carbon dioxide recovery device 60 as the heat transfer medium.

[0102] The exhaust gas that has passed through the heat recovery boiler 21 has a lower energy level than the exhaust gas that has not passed through the heat recovery boiler 21. In this embodiment, the exhaust gas that has passed through the heat recovery boiler 21 is used as the heat transfer medium. Therefore, in this embodiment, the running costs required to perform the process of releasing carbon dioxide CO2 from the adsorbent 62 can be reduced compared to the case where a heat transfer medium is generated separately.

[0103] (4) In the carbon dioxide recovery equipment of the fourth embodiment, the heat transfer medium line 70a is capable of guiding the compressed air extracted from the gas turbine 1 to the carbon dioxide recovery device 60 as the heat transfer medium.

[0104] The extraction of compressed air from the gas turbine 1 is performed to reduce the output of the gas turbine 1. In this embodiment, the compressed air extracted from the gas turbine 1 is used as a heat transfer medium to reduce the output of the gas turbine 1. Therefore, in this embodiment, the running costs required to perform the process of releasing carbon dioxide CO2 from the adsorbent 62 can be reduced compared to the case where a heat transfer medium is generated separately.

[0105] (5) The carbon dioxide recovery equipment in the fifth embodiment is equipped with boilers 39 and 21 capable of generating steam using the heat generated by the drive of the gas turbine 1, as in the carbon dioxide recovery equipment in the first embodiment. The heat transfer lines 70b and 70c are capable of guiding the steam from the boilers 39 and 21 to the carbon dioxide recovery device 60 as the heat transfer medium.

[0106] In this embodiment, steam generated using the heat produced by driving the gas turbine 1 is used as the heat transfer medium. Therefore, in this embodiment, the running costs required to perform the process of releasing carbon dioxide CO2 from the adsorbent 62 can be reduced compared to the case where a heat transfer medium is generated separately.

[0107] (6) The carbon dioxide recovery equipment in the sixth embodiment is a boiler capable of generating steam using the heat of the compressed air extracted from the gas turbine 1, in the carbon dioxide recovery equipment in the fifth embodiment.

[0108] The extraction of compressed air from the gas turbine 1 is performed to reduce the output of the gas turbine 1. In this embodiment, in order to reduce the output of the gas turbine 1, steam generated using the heat of the compressed air extracted from the gas turbine 1 is used as a heat transfer medium. Therefore, in this embodiment, the running costs required to perform the process of releasing carbon dioxide CO2 from the adsorbent 62 can be reduced compared to the case in which a heat transfer medium is generated separately.

[0109] (7) The carbon dioxide recovery equipment in the seventh embodiment is a waste heat recovery boiler capable of generating steam using the heat of the exhaust gas exhausted from the gas turbine 1, in the carbon dioxide recovery equipment in the fifth embodiment.

[0110] In this embodiment, steam generated using the heat of exhaust gas discharged from the gas turbine 1 is used as the heat transfer medium. Therefore, in this embodiment, the running costs required to perform the process of releasing carbon dioxide CO2 from the adsorbent 62 can be reduced compared to the case where a heat transfer medium is generated separately.

[0111] (8) The carbon dioxide recovery equipment in the eighth embodiment is equipped with a steam turbine 24 that can be driven by steam generated in the waste heat recovery boiler 21, in the carbon dioxide recovery equipment in the seventh embodiment. The heat transfer medium line 70c can guide steam from the steam turbine 24 to the carbon dioxide recovery device 60 as the heat transfer medium.

[0112] The steam from the steam turbine 24 has a lower energy level than the steam that does not reach the steam turbine 24. In this embodiment, the steam from the steam turbine 24 is used as the heat transfer medium. Therefore, in this embodiment, the running costs required to perform the process of releasing carbon dioxide CO2 from the adsorbent 62 can be reduced compared to the case where a heat transfer medium is generated separately.

[0113] (9) The carbon dioxide recovery equipment in the ninth embodiment is a carbon dioxide recovery equipment in any one of the first to eighth embodiments, wherein the carbon dioxide recovery device 60 has electrically driven devices 63, 64, 65. Furthermore, it includes power lines 51c, 51s, 51f, 51p that electrically connect the external power system 59 to the devices 63, 64, 65, and a storage battery 46 connected to the power lines 51c, 51s, 51f, 51p. The storage battery 46 is capable of storing power from the external power system 59 via the power lines 51c, 51s, 51f, 51p.

[0114] (10) In the carbon dioxide recovery equipment of the tenth embodiment, the equipment 63, 64, and 65 can be driven by power from the external power system 59.

[0115] In this embodiment, even when the battery 46 is not charged, the devices 63, 64, and 65 can be driven by power from the external power grid 59.

[0116] (11) In the carbon dioxide capture equipment of the eleventh embodiment, the equipment 63, 64, and 65 can be driven by power from the storage battery 46.

[0117] In this embodiment, the devices 63, 64, and 65 can be powered by electricity from the storage battery 46. Therefore, in this embodiment, the degree of freedom in the driving timing of the devices 63, 64, and 65 of the carbon dioxide capture device 60 can be increased compared to when the storage battery 46 is not present.

[0118] (12) The carbon dioxide recovery equipment in the twelfth embodiment is a carbon dioxide recovery equipment in any one of the first to eighth embodiments, wherein the carbon dioxide recovery device 60 has electrically driven equipment 63, 64, 65. Furthermore, it includes an extraction line 31 through which the compressed air extracted from the gas turbine 1 can flow, an auxiliary turbine 33 connected to the extraction line 31 and driven by the compressed air flowing through the extraction line 31, an auxiliary generator 41 connected to the auxiliary turbine 33 and capable of generating electricity by driving the auxiliary turbine 33, and power lines 51a, 51f, 51p, 51s that electrically connect the auxiliary generator 41 and the equipment 63, 64, 65.

[0119] In this embodiment, the output of the gas turbine 1 can be reduced by extracting compressed air from the gas turbine 1. Furthermore, in this embodiment, in order to reduce the output of the gas turbine 1, compressed air is extracted from the gas turbine 1 and used to drive the auxiliary turbine 33, which in turn generates electricity with the auxiliary generator 41. In this embodiment, the electricity generated by the auxiliary generator 41 is used to drive the components 63, 64, and 65 of the carbon dioxide capture device 60. Therefore, in this embodiment, power can be obtained to drive the components 63, 64, and 65 of the carbon dioxide capture device 60.

[0120] (13) The carbon dioxide recovery equipment in the thirteenth embodiment is equipped with a storage battery 46 capable of storing electricity generated by the auxiliary generator 41, in the carbon dioxide recovery equipment in the twelfth embodiment. The storage battery 46 is capable of supplying electricity to the devices 63, 64, and 65 via the power lines 51a, 51f, 51p, and 51s.

[0121] In this embodiment, the power generated by the auxiliary generator 41 and stored in the battery 46 can be used to drive the components 63, 64, and 65 of the carbon dioxide capture device 60. On the other hand, if there is no battery 46, the auxiliary generator 41 must be generating power in order to drive the components 63, 64, and 65 of the carbon dioxide capture device 60. Therefore, in this embodiment, the degree of freedom in the driving timing of the components 63, 64, and 65 of the carbon dioxide capture device 60 can be increased compared to when there is no battery 46.

[0122] (14) The carbon dioxide recovery equipment in the fourteenth embodiment comprises a gas turbine 1 having a compressor 10 capable of compressing air A, a combustor 15 capable of burning fuel F in the compressed air compressed by the compressor 10 to produce combustion gas, and a turbine 16 that can be driven by the combustion gas; a carbon dioxide recovery device 60 having electrically driven equipment 63, 64, 65 that can recover carbon dioxide CO2 from the atmosphere A; an extraction line 31 through which the compressed air extracted from the gas turbine 1 can flow; an auxiliary turbine 33 connected to the extraction line 31 and driven by the compressed air flowing through the extraction line 31; an auxiliary generator 41 connected to the auxiliary turbine 33 and capable of generating electricity by driving the auxiliary turbine 33; and power lines 51a, 51f, 51p, 51s that electrically connect the auxiliary generator 41 and the equipment 63, 64, 65.

[0123] In this embodiment, similar to the carbon dioxide capture equipment in the ninth embodiment, the output of the gas turbine 1 can be reduced. Furthermore, in this embodiment, similar to the carbon dioxide capture equipment in the ninth embodiment, power can be obtained to drive the components 63, 64, and 65 of the carbon dioxide capture device 60.

[0124] (15) The carbon dioxide recovery equipment in the fifteenth embodiment is equipped with a storage battery 46 capable of storing electricity generated by the auxiliary generator 41, in the carbon dioxide recovery equipment in the fourteenth embodiment. The storage battery 46 is capable of supplying electricity to the devices 63, 64, and 65 via the power lines 51a, 51f, 51p, and 51s.

[0125] In this embodiment, similar to the carbon dioxide capture equipment in the tenth embodiment, the degree of freedom in the driving timing of the components 63, 64, and 65 of the carbon dioxide capture device 60 can be increased compared to when there is no battery 46.

[0126] (16) In the carbon dioxide recovery method of the sixteenth embodiment, a recovery step S3 is performed in which carbon dioxide CO2 in the atmosphere A is recovered using a carbon dioxide recovery device 60 having an adsorbent material 62 capable of adsorbing carbon dioxide CO2, and a release step S4 is performed in which a heat transfer medium is introduced to the carbon dioxide recovery device 60 and the carbon dioxide CO2 adsorbed on the adsorbent material 62 is released from the adsorbent material 62. The heat transfer medium is generated by driving a gas turbine 1 having a compressor 10 capable of compressing air A, a combustor 15 capable of generating combustion gas by burning fuel F in the compressed air compressed by the compressor 10, and a turbine 16 that can be driven by the combustion gas.

[0127] In this embodiment, similar to the carbon dioxide recovery equipment in the first embodiment, it is possible to obtain the heat source necessary for carrying out the process of releasing carbon dioxide CO2 from the adsorbent 62, compared to when a heat transfer medium is generated separately.

[0128] (17) In the carbon dioxide recovery method of the seventeenth embodiment, the heat transfer medium is one of the exhaust gas exhausted from the gas turbine 1, the compressed air extracted from the gas turbine 1, and the steam generated using the heat generated by driving the gas turbine 1.

[0129] In this embodiment, similar to the carbon dioxide recovery equipment in any one of the second to eighth embodiments, the running costs required to perform the process of releasing carbon dioxide CO2 from the adsorbent 62 can be reduced compared to the case where a heat transfer medium is generated separately.

[0130] (18) In the carbon dioxide recovery method of the eighteenth embodiment, the carbon dioxide recovery device 60 has electrically driven devices 63, 64, 65, in the carbon dioxide recovery method of the sixteenth embodiment or the seventeenth embodiment. Furthermore, a charging step S2 is performed in which power from an external power system 59 is stored in a storage battery 46.

[0131] (19) In the carbon dioxide recovery method of the nineteenth embodiment, in the carbon dioxide recovery method of the eighteenth embodiment, in the recovery step S3 or the detachment step S4, the devices 63, 64, and 65 are driven by power from the external power system 59.

[0132] In this embodiment, even when the battery 46 is not charged, the device can be driven by power from an external power grid.

[0133] (20) In the carbon dioxide recovery method of the twentieth embodiment, in the carbon dioxide recovery method of the eighteenth embodiment, in the recovery step S3 or the detachment step S4, the devices 63, 64, and 65 are driven by power from the storage battery 46.

[0134] In this embodiment, the equipment can be powered by electricity from the storage battery 46. Therefore, in this embodiment, the degree of freedom in the driving timing of the equipment 63, 64, and 65 of the carbon dioxide capture device 60 can be increased compared to when there is no storage battery 46.

[0135] (21) In the carbon dioxide recovery method of the 21st embodiment, in the carbon dioxide recovery method of the 16th embodiment or the 17th embodiment, the carbon dioxide recovery device 60 has electrically driven equipment 63, 64, 65. The compressed air extracted from the gas turbine 1 drives the auxiliary turbine 33, and the power generation process S1 is performed in which the auxiliary generator 41 generates electricity by driving the auxiliary turbine 33. In the recovery process S3 or the detachment process S4, the electricity generated in the power generation process S1 drives the equipment 63, 64, 65.

[0136] In this embodiment, similar to the carbon dioxide capture equipment in the ninth embodiment, the output of the gas turbine 1 can be reduced. Furthermore, in this embodiment, similar to the carbon dioxide capture equipment in the ninth embodiment, power can be obtained to drive the components 63, 64, and 65 of the carbon dioxide capture device 60.

[0137] (22) In the carbon dioxide recovery method of the twenty-second embodiment, in the carbon dioxide recovery method of the twenty-first embodiment, a charging step S2 is performed to store the electricity generated in the power generation step S1 in the storage battery 46. In the recovery step S3 or the detachment step S4, the devices 63, 64, and 65 are driven with the electricity stored in the storage battery 46 in the charging step S2.

[0138] In this embodiment, similar to the carbon dioxide capture equipment in the tenth embodiment, the degree of freedom in the driving timing of the components 63, 64, and 65 of the carbon dioxide capture device 60 can be increased compared to when there is no battery 46.

[0139] (23) In the carbon dioxide recovery method of the twenty-third embodiment, a recovery step S3 is performed in which carbon dioxide CO2 from the atmosphere A is recovered by adsorbing it onto an adsorbent 62 in a carbon dioxide recovery device 60 having electrically driven devices 63, 64, 65; a detachment step S4 is performed in which a heat transfer medium is introduced to the carbon dioxide recovery device 60 to detach the carbon dioxide CO2 adsorbed onto the adsorbent 62 from the adsorbent 62; and a power generation step S1 is performed in which compressed air is extracted from a gas turbine 1 having a compressor 10 capable of compressing air A, a combustor 15 capable of burning fuel F in the compressed air compressed by the compressor 10 to generate combustion gas, and a turbine 16 driven by the combustion gas, and an auxiliary turbine 33 is driven by the auxiliary turbine 33 to generate electricity with an auxiliary generator 41.

[0140] In this embodiment, similar to the carbon dioxide capture equipment in the twelfth embodiment, the output of the gas turbine 1 can be reduced. Furthermore, in this embodiment, similar to the carbon dioxide capture equipment in the ninth embodiment, power can be obtained to drive the components 63, 64, and 65 of the carbon dioxide capture device 60.

[0141] (24) In the carbon dioxide recovery method of the twenty-fourth embodiment, in the carbon dioxide recovery method of the twenty-third embodiment, a charging step S2 is performed to store the electricity generated in the power generation step S1 in the storage battery 46. In the recovery step S3 or the detachment step S4, the devices 63, 64, and 65 are driven with the electricity stored in the storage battery 46 in the charging step S2.

[0142] In this embodiment, similar to the carbon dioxide capture equipment in the thirteenth embodiment, the degree of freedom in the driving timing of the components 63, 64, and 65 of the carbon dioxide capture device 60 can be increased compared to when there is no storage battery 46.

[0143] According to one aspect of this disclosure, carbon dioxide can be recovered from the atmosphere in an economically efficient manner.

[0144] 1: Gas turbine 2: Gas turbine rotor 3: Intermediate casing 4: Fuel line 5: Fuel valve 6: Gas turbine generator 10: Compressor 11: Compressor rotor 11s: Compressor rotor shaft 11b: Blade row 12: Compressor casing 13: Intake volume regulator 13v: Inlet guide vane (IGV) 13d: Drive unit 15: Combustor 16: Turbine 17: Turbine rotor 17s: Turbine rotor shaft 17b: Blade row 18: Turbine casing 20: Waste heat utilization equipment 21: Waste heat recovery boiler 21c: Boiler casing 21t: Heat transfer tube 22: Exhaust duct 23: Chimney 24: Steam turbine 25: Main steam line 26: Condenser 27: Feedwater line 28: Feedwater pump 30, 30b: Extraction equipment 31: Extraction line 32: Extraction valve 33: Auxiliary turbine 34: Auxiliary turbine rotor 35: Auxiliary turbine casing 39: Boiler 40: Auxiliary power generation equipment 41: Auxiliary generator 42: Transmission 43: Clutch 45: Energy storage device 46: Storage battery 47: AC / DC converter 50: Power system equipment 51g: Dedicated power line for GT generator 51a: Dedicated power line for AT generator 51b: Dedicated power line for BESS 51s: Shared power line within the plant 51c: External connection power line 51f: Dedicated power line for fans 51p: Dedicated power line for pumps 53a, 53b, 53c, 53g: Transformers 54a, 54b, 54c, 54g, 54f, 54p: Switches 55: Output meter 59: External power system 60: Carbon dioxide capture device 61: Duct 61i: Inlet 61o: Outlet 62: Adsorbent 63, 64, 65: Equipment 63f: Inlet fan 63m, 64m, 65m: Electric motor 64f: Outlet fan 65p: Vacuum pump 66i: Inlet damper 66o: Outlet damper 67: Suction line 68: Suction valve 69: Drain tank 70, 70a, 70b, 70c: Heat transfer fluid line 71, 71a, 71b, 71c: Heat transfer fluid valve 100: Control device 101: Main controller 102: GT controller 104: Bleeding controller 105: Switching controller 106: DAC controller A: Air (or atmosphere) CO2: Carbon dioxide F: Fuel PWr: Actual output PWc: Requested output Ar: Rotor axis Da: Axial direction Dau: Upstream side of axis Dad: Downstream side of axis

Claims

1. A gas turbine comprising: a compressor capable of compressing air; a combustor capable of burning fuel in the compressed air compressed by the compressor to produce combustion gas; and a turbine capable of being driven by the combustion gas; a carbon dioxide recovery device capable of recovering carbon dioxide from the atmosphere; and a heat transfer medium line capable of guiding a heat transfer medium generated by the operation of the gas turbine to the carbon dioxide recovery device, wherein the carbon dioxide recovery device has an adsorbent capable of adsorbing carbon dioxide from the atmosphere and releasing the adsorbed carbon dioxide by heating with the heat transfer medium.

2. A carbon dioxide recovery apparatus according to claim 1, wherein the heat transfer medium line is capable of guiding exhaust gas discharged from the gas turbine to the carbon dioxide recovery device as the heat transfer medium.

3. A carbon dioxide recovery system according to claim 2, comprising a waste heat recovery boiler capable of generating steam using the heat of the exhaust gas discharged from the gas turbine, wherein the heat transfer medium line is capable of guiding the exhaust gas that has passed through the waste heat recovery boiler to the carbon dioxide recovery device as the heat transfer medium.

4. A carbon dioxide recovery apparatus according to claim 1, wherein the heat transfer medium line is capable of guiding the compressed air extracted from the gas turbine to the carbon dioxide recovery device as the heat transfer medium.

5. A carbon dioxide recovery apparatus according to claim 1, comprising a boiler capable of generating steam using heat generated by driving the gas turbine, wherein the heat transfer medium line is capable of guiding the steam from the boiler to the carbon dioxide recovery device as the heat transfer medium.

6. A carbon dioxide recovery apparatus according to claim 5, wherein the boiler is a boiler capable of generating steam using the heat of the compressed air extracted from the gas turbine.

7. A carbon dioxide recovery facility according to claim 5, wherein the boiler is a waste heat recovery boiler capable of generating steam using the heat of exhaust gas discharged from the gas turbine.

8. A carbon dioxide recovery apparatus according to claim 7, comprising a steam turbine that can be driven by steam generated in the waste heat recovery boiler, wherein the heat transfer medium line is capable of guiding steam from the steam turbine to the carbon dioxide recovery device as the heat transfer medium.

9. A carbon dioxide recovery apparatus according to any one of claims 1 to 8, wherein the carbon dioxide recovery apparatus has an electrically powered device, and further comprises a power line for electrically connecting an external power system to the device, and a storage battery connected to the power line, wherein the storage battery is capable of storing power from the external power system via the power line.

10. A carbon dioxide recovery apparatus according to claim 9, wherein the apparatus is powered by electricity from the external power grid.

11. A carbon dioxide recovery apparatus according to claim 9, wherein the apparatus is powered by electricity from the storage battery.

12. A carbon dioxide recovery apparatus according to any one of claims 1 to 8, wherein the carbon dioxide recovery apparatus has an electrically driven device, and further comprises: an extraction line through which compressed air extracted from the gas turbine can flow; an auxiliary turbine connected to the extraction line and driven by the compressed air flowing through the extraction line; an auxiliary generator connected to the auxiliary turbine and capable of generating electricity by driving the auxiliary turbine; and a power line electrically connecting the auxiliary generator and the device.

13. A carbon dioxide recovery system according to claim 12, comprising a storage battery capable of storing electricity generated by the auxiliary generator, wherein the storage battery can supply electricity to the equipment via the power line.

14. A gas turbine having a compressor capable of compressing air, a combustor capable of burning fuel in the compressed air compressed by the compressor to produce combustion gas, and a turbine driven by the combustion gas; a carbon dioxide recovery device having electrically driven equipment capable of recovering carbon dioxide from the atmosphere; an extraction line through which the compressed air extracted from the gas turbine can flow; an auxiliary turbine connected to the extraction line and driven by the compressed air flowing through the extraction line; an auxiliary generator connected to the auxiliary turbine and capable of generating electricity by driving the auxiliary turbine; and a power line electrically connecting the auxiliary generator and the equipment.

15. A carbon dioxide recovery system according to claim 14, comprising a storage battery capable of storing electricity generated by the auxiliary generator, wherein the storage battery can supply electricity to the equipment via the power line.

16. A method for recovering carbon dioxide, comprising: a recovery step of recovering carbon dioxide from the atmosphere using a carbon dioxide recovery device having an adsorbent capable of adsorbing carbon dioxide; a release step of introducing a heat transfer medium into the carbon dioxide recovery device and releasing the carbon dioxide adsorbed on the adsorbent from the adsorbent; and generating the heat transfer medium by driving a gas turbine having a compressor capable of compressing air, a combustor capable of burning fuel in the compressed air compressed by the compressor to generate combustion gas, and a turbine driven by the combustion gas.

17. A method for recovering carbon dioxide according to claim 16, wherein the heat transfer medium is one of the following: exhaust gas discharged from the gas turbine, compressed air extracted from the gas turbine, and steam generated using the heat generated by driving the gas turbine.

18. A method for recovering carbon dioxide according to claim 16 or 17, wherein the carbon dioxide recovery apparatus has an electrically powered device, and further performs a charging step of storing power from an external power grid in a storage battery.

19. A method for recovering carbon dioxide according to claim 18, wherein in the recovery step or the detachment step, the equipment is driven by power from the external power system.

20. A method for recovering carbon dioxide according to claim 18, wherein in the recovery step or the detachment step, the equipment is driven by electricity from the storage battery.

21. A method for recovering carbon dioxide according to claim 16 or 17, wherein the carbon dioxide recovery apparatus has an electrically driven device, performs a power generation step in which an auxiliary turbine is driven by compressed air extracted from the gas turbine, and an auxiliary generator generates electricity by driving the auxiliary turbine, and in the recovery step or the detachment step, the device is driven by the electricity generated in the power generation step.

22. A method for recovering carbon dioxide according to claim 21, wherein a charging step is performed to store the electricity generated in the power generation step in a storage battery, and in the recovery step or the detachment step, the equipment is driven by the electricity stored in the storage battery in the charging step.

23. A carbon dioxide recovery method comprising: a recovery step of recovering carbon dioxide from the atmosphere by adsorbing it onto an adsorbent, using a carbon dioxide recovery device having electrically driven equipment; a detachment step of introducing a heat transfer medium into the carbon dioxide recovery device and detaching the carbon dioxide adsorbed onto the adsorbent from the adsorbent; and a power generation step of extracting compressed air from a gas turbine having a compressor capable of compressing air, a combustor capable of burning fuel in the compressed air compressed by the compressor to produce combustion gas, and a turbine capable of being driven by the combustion gas, thereby driving an auxiliary turbine and generating electricity with an auxiliary generator driven by the auxiliary turbine, wherein in the recovery step or the detachment step, the equipment is driven by the electricity generated in the power generation step.

24. A method for recovering carbon dioxide according to claim 23, wherein a charging step is performed to store the electricity generated in the power generation step in a storage battery, and in the recovery step or the detachment step, the equipment is driven by the electricity stored in the storage battery in the charging step.

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