Control device, exhaust gas supply system, control method, and program

Abstract

To provide a control device which causes a blower to operate based on operational conditions.SOLUTION: A control device is a control device of a system which supplies exhaust gas exhausted by a facility to a CO2 recovery device with a blower and includes: a detection unit configured to detect an operation state of the facility; a determination unit which determines whether or not a flow rate of the exhaust gas is in an operation range of the blower based on the detected operation state; and a control unit which operates the blower when the flow rate of the exhaust gas is in the operation range and stops the blower when the flow rate of the exhaust gas is out of the operation range.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This disclosure relates to 2 The present invention relates to a control device for a system for supplying exhaust gas to a recovery device, an exhaust gas supply system, a control method, and a program. [Background technology]

[0002] CO 2 The application of capture equipment to various upstream facilities such as gas turbines and GTCC is being considered. For example, 2 A blower is installed between the recovery equipment and the exhaust gas emitted by the upstream equipment (gas turbine) is drawn in and CO 2 The document 1 describes a chimney that discharges exhaust gas from an upstream industrial facility to the outside, a blower that is installed downstream of the chimney and draws in the exhaust gas, and a CO recovery device that recovers the CO from the exhaust gas drawn in by the blower. 2 CO2 emissions 2 The CO2 recovery system is equipped with a blower and the exhaust flow rate of the flue gas from the chimney is reduced to zero. 2 Increase the amount of exhaust gas drawn into the recovery device. When the amount of emissions from the chimney becomes zero, draw in the exhaust gas at a roughly constant rate and remove the CO in the exhaust gas. 2 CO to be captured 2 A recovery system is disclosed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5039651 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in Patent Document 1 discloses a method for controlling the operation of a blower based on the flue gas flow rate in the chimney, but the operable range of the blower is not taken into consideration, and it is not possible to determine the timing of starting and stopping. In addition, it is difficult to detect the flue gas flow rate, and it is desirable to be able to determine it in a simpler way.

[0005] The present disclosure provides a control device, an exhaust gas supply system, a control method, and a program that can solve the above problems. [Means for solving the problem]

[0006] The control device disclosed in the present disclosure converts exhaust gas discharged from equipment into CO by a blower. 2 A control device for a system that supplies to a recovery device includes a detection unit that detects the operating state of the equipment, a judgment unit that judges whether the flow rate of the exhaust gas is within the operating range of the blower based on the detected operating state, and a control unit that starts the blower when the flow rate of the exhaust gas is within the operating range, and stops the blower when the flow rate of the exhaust gas is lower than the operating range.

[0007] The exhaust gas supply system of the present disclosure includes an exhaust gas system that guides exhaust gas discharged from a facility to a CO2 capture device, and a CO 2 The exhaust gas recovery system includes a blower provided downstream of the blower, a damper provided downstream of the blower in the exhaust gas system, a chimney provided downstream of the damper in the exhaust gas system, and the above-mentioned control device, and the control unit opens the damper when the flow rate of the exhaust gas is within the operating range, and closes the damper when the flow rate of the exhaust gas is lower than the operating range.

[0008] The control method disclosed herein is a method for converting exhaust gas discharged from a facility into CO by a blower. 2A control method for a system that supplies to a recovery device, comprising the steps of: detecting an operating state of the equipment; determining whether or not a flow rate of the exhaust gas is within an operating range of the blower based on the detected operating state; and operating the blower if the flow rate of the exhaust gas is within the operating range, and stopping the blower if the flow rate of the exhaust gas is lower than the operating range.

[0009] The program disclosed herein causes a computer to control the exhaust gas discharged from the equipment by a blower to reduce the amount of CO 2 The system executes a process for controlling a system that supplies to a recovery device, the process including the steps of: detecting the operating state of the equipment; determining whether or not the flow rate of the exhaust gas is within the operating range of the blower based on the detected operating state; and operating the blower if the flow rate of the exhaust gas is within the operating range, and stopping the blower if the flow rate of the exhaust gas is lower than the operating range. Effect of the Invention

[0010] According to the above-described control device, exhaust gas supply system, control method, and program, the blower is operated based on an operable condition, so that the machine or facility can be operated safely. [Brief description of the drawings]

[0011] [Figure 1] 1 is a schematic diagram of a CO2 capture system according to a first embodiment. [Diagram 2] 5 is a flowchart showing an example of control according to the first embodiment. [Diagram 3] FIG. 1 is a schematic diagram of a CO2 capture system according to a second embodiment. [Figure 4] 10 is a flowchart showing an example of control according to the second embodiment. [Diagram 5] FIG. 11 is a schematic diagram of a CO2 capture system according to a third embodiment. [Figure 6] 13 is a flowchart showing an example of control according to the third embodiment. [Figure 7]FIG. 2 is a diagram illustrating an example of a hardware configuration of a control device according to each embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The following is the CO 2 The control of the blower and other components in the recovery system will be described with reference to FIGS. First Embodiment (composition) FIG. 1 is a diagram showing a CO 2 FIG. 1 is a schematic diagram of a capture system 100. 2 The recovery system 100 includes an upstream facility 1, a stack (chimney) 4, a cooling tower 5, a blower 6, and a CO 2 The upstream facility 1 is, for example, a power plant such as a gas turbine or a GTCC (Gas Turbine Combined Cycle). In this embodiment, the upstream facility 1 is, for example, a GTCC 3. An IGV (inlet guide vane) 2 is provided on the inlet side of the GTCC 3. The flow rate of air taken into the GTCC 3 is changed by adjusting the opening of the IGV 2. For example, when the load of the GTCC 3 is high, the flow rate of air taken in is also high, and the opening of the IGV 2 is controlled according to the required amount of air intake. The GTCC 3, a cooling tower 5, a blower 6, and a CO 2 The recovery device 8 is disposed on the exhaust gas system L1, and each device is connected by pipes, ducts, etc. Between the GTCC 3 and the cooling tower 5, there is a branch point that connects to the system L2, and a stack 4 is provided at the end of the system L2. A damper D1 (also referred to as a stack inlet damper D1) is provided in the system L2. A damper D2 (CO 2 When the damper D1 is opened and the damper D2 is closed, the exhaust gas discharged from the GTCC 3 is discharged from the stack 4 to the outside of the system. When the damper D1 is closed and the damper D2 is opened, the exhaust gas discharged from the GTCC 3 is discharged from the stack 4 to the outside of the system. 2 The cooling tower 5 and the CO2 A blower 6 is provided between the recovery device 8 and is started by driving a motor 7. When the blower 6 is started, exhaust gas is drawn in and CO 2 The wastewater is supplied to a recovery device 8. A control device 10 controls opening and closing of the damper D1, opening and closing of the damper D2, starting and stopping of the blower 6 (motor 7), and the like.

[0013] The control device 10 includes a detection unit 11, a determination unit 12, and a control unit 13. The detection unit 11 acquires information indicating the operating state of the upstream equipment 1, etc. For example, the detection unit 11 acquires the aperture of the IGV 2, the output of the GTCC, the rotation speed of the gas turbine and steam turbine that constitute the GTCC, etc. The determination unit 12 determines whether the amount of exhaust gas discharged from the GTCC 3 is within the operating range of the blower 6 based on the information acquired by the detection unit 11. The control unit 13 controls the opening and closing of the dampers D1, D2, the start and stop of the blower 6, the rotation speed of the blower 6, etc. based on the determination result of the determination unit 12.

[0014] (operation) Figure 2 shows CO 2 An example of a method for controlling the recovery system 100 will be described. First, the control device 10 opens the stack inlet damper D1 (step S1). Next, the upstream equipment 1 (GTCC 3) is started (step S2). When the GTCC 3 is started, the flow rate of exhaust gas discharged from the GTCC 3 is small until the output increases. When the blower 6 is started in a state where the flow rate of exhaust gas is small, gas on the downstream side (downstream side in the direction of exhaust gas flow, the same applies below) of the exhaust gas system L1 is pulled, so that the pressure of downstream machines and ducts becomes negative, for example, and there is a possibility that the machines and ducts of the exhaust gas system L1, which are assumed to be used at normal pressure, may break down or deteriorate. Therefore, the control device 10 (determination unit 12) determines whether the flow rate of exhaust gas from the GTCC 3 is equal to or greater than the flow rate at which the blower 6 can operate (step S3). For example, if the opening degree of the IGV 2 acquired by the detection unit 11 is equal to or greater than a predetermined threshold value, the determination unit 12 determines that the output of the GTCC 3 and the amount of exhaust gas are large, and therefore determines that the flow rate of exhaust gas discharged from the GTCC 3 is equal to or greater than the flow rate at which the blower 6 can operate. If the opening degree of the IGV 2 is less than a predetermined threshold, the determination unit 12 determines that the exhaust gas flow rate is less than the flow rate at which the blower 6 can be operated. Similarly, if the gas turbine rotation speed or the GTCC load is equal to or greater than a predetermined threshold, the determination unit 12 may determine that the exhaust gas flow rate is equal to or greater than the flow rate at which the blower 6 can be operated, and if they are less than the threshold, the determination unit 12 may determine that the exhaust gas flow rate is less than the flow rate at which the blower 6 can be operated. When the determination unit 12 determines that the exhaust gas flow rate is equal to or greater than the flow rate at which the blower 6 can be operated (step S3; Yes), the control unit 13 2 The recovery device inlet damper D2 is opened (step S4). Next, the control unit 13 drives the motor 7 to start the blower 6 (step S5). Next, the control unit 13 closes the stack inlet damper D1.

[0015] 2 has been described taking as an example the control at the start of the GTCC 3, but even during operation or at the stop of the GTCC 3, the determination unit 12 may determine whether the flow rate of exhaust gas discharged from the GTCC 3 is equal to or greater than the flow rate at which the blower 6 can be operated, depending on the IGV aperture, gas turbine rotation speed, load, and the like acquired by the detection unit 11, and control the start and stop of the blower 6, etc., depending on the determination result. For example, when the flow rate of exhaust gas falls below the operable range of the blower 6, the control unit 13 opens the damper D1, stops the blower 6, and closes the damper D2. Then, when the flow rate of exhaust gas falls within the operable range of the blower 6, the control unit 13 opens the damper D2, starts the blower 6, and closes the damper D1.

[0016] (effect) As described above, according to this embodiment, it is determined whether the exhaust gas flow rate is within the operable range of the blower 6, and the dampers D1, D2 and the blower 6 are controlled. By considering the operable conditions of the blower 6 (the lower limit flow rate of the exhaust gas), it is possible to avoid failures of the pipes, ducts, machinery, etc., and to operate the plant safely. Since the magnitude of the exhaust gas flow rate is determined from the operating state of the upstream equipment 1, there is no need to install a flow meter, pressure gauge, etc., and the blower 6 can be automatically started and stopped based on the operable conditions, thereby realizing automated operation.

[0017] Second Embodiment In the second embodiment, a flow rate adjustment function is provided to widen the operable range of the blower 6 (to lower the lower limit flow rate). 2The recovery system 100a is shown in outline. In the second embodiment, a flow rate adjustment means D3 is provided on the inlet side of the blower 6, and the rotation speed of the blower 6 and the flow rate adjustment means D3 are controlled. The flow rate adjustment means D3 is, for example, a damper with an adjustable opening degree, or a blower inlet vane such as an IGV2 that can adjust the flow rate of exhaust gas flowing to the rear stage by adjusting the opening degree of the vane. When the flow rate adjustment means D3 is used to reduce the flow rate of exhaust gas, the amount of intake is reduced even when the blower 6 is started, and the influence on the pressure of the exhaust gas system L1 (such as negative pressure) can be suppressed even if a sufficient amount of exhaust gas is not flowing. In addition, if the blower 6 is operated with the rotation speed reduced, the amount of intake is reduced, so that the adverse influence of the exhaust gas system L1 becoming negative pressure can also be reduced. In other words, by reducing the flow rate using the flow rate adjustment means D3 and / or operating the blower 6 at a low rotation speed, the blower 6 can be started in a state where the exhaust gas flow rate is smaller than that in the first embodiment.

[0018] CO according to the second embodiment 2 3, the recovery system 100a may be configured to include a flow rate adjustment means D3, adjust (throttle) the exhaust gas flow rate by the flow rate adjustment means D3, and operate the blower 6 at a rated rotation speed, or may be configured to include no flow rate adjustment means D3 and only control the rotation speed of the blower 6. However, by providing the flow rate adjustment means D3 to control the flow rate and further controlling the rotation speed of the blower 6, it is possible to minimize the operating conditions of the blower 6 (the lower limit flow rate of exhaust gas) and widen the operating range.

[0019] (operation) Figure 4 shows CO 2 An example of a control method for the recovery system 100a will be described below. First, the control device 10 opens the stack inlet damper D1 (step S1). Next, the upstream equipment 1 (GTCC 3) is started (step S2). Next, the control unit 13 sets the opening degree of the blower inlet vane D3 to the minimum (step S2-1). This broadens the operable condition of the blower 6 (lower limit flow rate of exhaust gas). Next, the judgment unit 12 judges whether the exhaust gas flow rate is equal to or higher than the flow rate at which the blower 6 can be operated (step S3). For example, if the opening degree of the IGV2 acquired by the detection unit 11 is equal to or higher than a predetermined threshold value, the judgment unit 12 judges that the exhaust gas flow rate is equal to or higher than the flow rate at which the blower 6 can be operated. When the judgment unit 12 judges that the exhaust gas flow rate is equal to or higher than the operable flow rate (step S3; Yes), the control unit 13 determines whether the CO 2 The recovery device inlet damper D2 is opened (step S4). Next, the control unit 13 starts the blower 6 (step S5). At this time, the control unit 13 may start the blower 6 at the minimum rotation speed, for example. Next, the control unit 13 closes the stack inlet damper D1.

[0020] Next, the determination unit 12 determines whether the load of the upstream equipment 1 has changed based on the opening degree of the IGV 2, the rotation speed of the gas turbine, the load, and the like acquired by the detection unit 11 (step S6). For example, if the opening degree of the IGV 2 or the rotation speed of the gas turbine changes by a predetermined value or more, the determination unit 12 determines that the load has changed. If it is determined that the load has changed (step S6; Yes), the control unit 13 adjusts the operating state of the blower 6 according to the load of the upstream equipment 1 (step S7). For example, if the load of the upstream equipment 1 decreases, there is a possibility that the system pressure will become negative if the blower 6 is operated at the rated rotation speed. Therefore, the control unit 13 reduces the rotation speed of the blower 6 according to the load of the upstream equipment 1. If the load of the upstream equipment 1 increases, the control unit 13 increases the rotation speed of the blower 6 according to the load of the upstream equipment 1. For example, the control unit 13 may store a table or a function that defines the relationship between the operating state of the upstream equipment 1 (IGV opening, gas turbine rotation speed, load, etc.) and the rotation speed of the blower 6, and control the rotation speed of the blower 6 based on this table or function. The control device 10 continues the processing from step S6 onwards. If it is determined that the load has not changed (step S6; No), the control device 10 determines whether to stop the blower 6 (step S8). If it is not to stop the blower 6 (step S8; No), the control device 10 continues the processing from step S6 onwards. If it is to stop the blower 6 (step S8; Yes), the control device 10 stops the blower 6.

[0021] (effect) As described above, according to the present embodiment, in addition to the effects of the first embodiment, the range in which the blower 6 can be operated can be expanded by adjusting the flow rate lower limit of the blower 6. By lowering the operable condition, the blower 6 can be started at an earlier stage after the start-up of the GTCC 3, and the CO 2 Since exhaust gas can be sent to the recovery device 8, CO 2 An improvement in recovery rates can be expected.

[0022] <Third embodiment> In the third embodiment, a blower circulation system L3 is provided in the blower 6, and when the amount of exhaust gas supplied from the upstream equipment 1 is small, the flow rate is ensured by circulating the exhaust gas in the blower circulation system L3. 2 The outline of the recovery system 100b is shown. As shown in FIG. 5, a blower circulation system L3 is provided that connects the inlet side and the outlet side of the blower 6, and a valve V1 is provided in the blower circulation system L3. When the valve V1 is opened, a part of the exhaust gas drawn in by the blower 6 is returned to the inlet side of the blower 6 through the blower circulation system L3. Even when the amount of exhaust gas supplied from the upstream equipment 1 is small, a part of the exhaust gas drawn in can be covered by the exhaust gas returned through the recycle system L3, so that the adverse effect on the pressure of the exhaust gas system L1 can be reduced. This makes it possible to lower the start-up condition (lower limit flow rate) of the blower 6 and to widen the operating range. Also, for example, even when the upstream equipment 1 is stopped, the blower 6 can be operated (put into standby state) by opening the valve V1 and circulating gas through the blower circulation system L3, and when the amount of exhaust gas increases, the damper D2 is opened and the opening degree of the valve V1 is adjusted (for example, fully closed), so that the exhaust gas from the GTCC 3 can be promptly converted into CO2. 2 It can then be supplied to the recovery device 8.

[0023] (operation) Figure 6 shows CO 2 An example of a control method for the recovery system 100b will be described below. First, the control device 10 2The recovery device inlet damper D2 and the valve V1 of the blower circulation system L3 are opened (step S11). Next, the control device 10 closes the stack inlet damper D1 (step S12). Next, the control unit 13 starts the blower 6 (step S13). Next, the upstream equipment 1 (GTCC 3) is started (step S14). Next, the determination unit 12 determines whether the load of the upstream equipment 1 has changed based on the IGV opening degree, the gas turbine rotation speed, and the like acquired by the detection unit 11 (step S15). For example, when the opening degree of the IGV 2 or the rotation speed of the gas turbine changes by a predetermined value or more, the determination unit 12 determines that the load has changed. When it is determined that the load has changed (step S15; Yes), the control unit 13 adjusts the valve opening degree of the valve V1 of the blower circulation system L3 according to the load of the upstream equipment 1 (step S16). For example, when the load of the upstream equipment 1 decreases, if the blower 6 is operated at the rated rotation speed, the system pressure may become negative. Therefore, the control unit 13 increases (opens) the valve V1 in accordance with the load of the upstream equipment 1, so as to control the valve V1 so that more exhaust gas returns to the inlet side of the blower 6. When the load of the upstream equipment 1 increases, the exhaust gas flow rate also increases. The control unit 13 decreases (closes) the valve V1 in order to return more exhaust gas to the inlet side of the blower 6. 2 The control unit 13 may control the opening of the valve V1 based on the table or function that defines the relationship between the operating state of the upstream equipment 1 (IGV opening, gas turbine rotation speed, load, etc.) and the opening of the valve V1. The control device 10 continues the process from step S15 onwards. If it is determined that the load has not changed (step S15; No), the control device 10 determines whether to stop the blower 6 (step S17). If it is not to stop the blower 6 (step S17; No), the control device 10 continues the process from step S15 onwards. If it is to stop the blower 6 (step S17; Yes), the control device 10 stops the blower 6.

[0024] (effect) As described above, according to this embodiment, in addition to the effects of the first embodiment, the range in which the blower 6 can be operated can be expanded by adjusting the flow rate lower limit of the blower 6. Furthermore, even when the upstream equipment 1 is stopped, the blower 6 can be operated without being stopped and can be in a standby state, and CO2 can be quickly released when the upstream equipment 1 is started. 2 The exhaust gas can be supplied to the recovery device 8. The third embodiment can be combined with the second embodiment.

[0025] <Fourth embodiment> In the fourth embodiment, in the configuration of the second embodiment, the flow rate adjustment means D3 is adjusted in advance according to the operating state of the upstream equipment 1. For example, in step S7 of the flowchart in Fig. 4, the opening degree of the flow rate adjustment means D3 is adjusted in addition to the operating state (rotation speed) of the blower 6. For example, the control unit 13 increases the opening degree of the flow rate adjustment means D3 as the load increases (as the exhaust gas flow rate increases) to reduce as much exhaust gas as possible to CO 2 The control unit 13 controls the flow rate adjustment means D3 to be smaller in opening and to throttle the flow rate as the load decreases (as the exhaust gas flow rate decreases). This makes it possible to widen the operating range of the blower 6. For example, the control unit 13 may store a table or function that specifies the relationship between the operating state of the upstream equipment 1 (IGV opening, gas turbine rotation speed, load, etc.) and the opening of the flow rate adjustment means D3, and control the opening of the flow rate adjustment means D3 based on this table or function.

[0026] (effect) According to the fourth embodiment, even if the load of the upstream equipment 1 suddenly changes, the flow rate adjustment means D3 is adjusted in advance based on the operating state of the upstream equipment 1, so that the amount of exhaust gas flowing through the system L1 is controlled according to the load. 2 The recovery system 100a as a whole can achieve stable operation. In addition, the flow rate adjustment means D3 and the rotation speed of the blower 6 are not controlled based on the values ​​measured by the flow meter and pressure meter, so that the control can be simplified.

[0027] As described above, according to the first to fourth embodiments, it is possible to control the start and stop of the blower 6 in accordance with the operable range of the blower 6. Moreover, according to the second to fourth embodiments, it is possible to widen the operable range of the blower 6.

[0028] FIG. 7 is a diagram showing an example of a hardware configuration of a control device according to each embodiment. A computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, an input / output interface 904, and a communication interface 905. The above-mentioned control device 10 is implemented in the computer 900. The above-mentioned functions are stored in the auxiliary storage device 903 in the form of a program. The CPU 901 reads the program from the auxiliary storage device 903, loads it in the main storage device 902, and executes the above-mentioned processing according to the program. The CPU 901 also secures a storage area in the main storage device 902 according to the program. The CPU 901 also secures a storage area in the auxiliary storage device 903 for storing data being processed according to the program.

[0029] A program for realizing all or part of the functions of the control device 10 may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read into a computer system and executed to perform processing by each functional unit. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. In addition, if a WWW system is used, the term "computer system" also includes a homepage providing environment (or display environment). In addition, the term "computer-readable recording medium" refers to a portable medium such as a CD, DVD, or USB, or a storage device such as a hard disk built into a computer system. In addition, if the program is distributed to the computer 900 via a communication line, the computer 900 that receives the program may deploy the program in the main storage device 902 and execute the above processing. In addition, the above program may be for realizing part of the above-mentioned functions, or may be capable of realizing the above-mentioned functions in combination with a program already recorded in the computer system.

[0030] As described above, several embodiments according to the present disclosure have been described, but all of these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents as described in the claims, as well as in the scope and gist of the invention.

[0031] <Additional Notes> The control device, the exhaust gas supply system, the control method, and the program described in each embodiment can be understood, for example, as follows.

[0032] (1) The control device according to the first aspect converts exhaust gas discharged from an equipment into CO by a blower. 2A control device for a system that supplies to a recovery device includes a detection unit that detects the operating state of the equipment, a judgment unit that judges whether the flow rate of the exhaust gas is within the operating range of the blower based on the detected operating state, and a control unit that starts the blower when the flow rate of the exhaust gas is within the operating range, and stops the blower when the flow rate of the exhaust gas is lower than the operating range. The blower is operated based on the operable conditions, so equipment and facilities can be operated safely.

[0033] (2) A control device according to a second aspect is the control device of (1), wherein the control unit controls the rotation speed of the blower in response to a flow rate of the exhaust gas based on the operating state. When the flow rate of exhaust gas is low, the operating range of the blower can be expanded by lowering the rotation speed of the blower.

[0034] (3) CO relating to the third aspect 2 The capture system includes an exhaust gas system that guides exhaust gas discharged from the facility to a CO2 capture device, and a CO 2 The exhaust gas system includes a blower provided downstream of a recovery device, a damper provided upstream of the blower in the exhaust gas system, a chimney provided upstream of the damper in the exhaust gas system, and control devices (1) to (2), wherein the control unit opens the damper when the flow rate of the exhaust gas is within the operating range, and closes the damper when the flow rate of the exhaust gas is lower than the operating range. This allows the blower to be operated according to the exhaust gas flow rate, allowing devices and equipment to be operated safely.

[0035] (4) A control device according to a fourth aspect is an exhaust gas supply system as in (3), further comprising an exhaust gas flow rate control means provided between the damper and the blower in the exhaust gas system, and the control unit adjusts the opening degree of the flow rate control means in accordance with the exhaust gas flow rate based on the operating state. By adjusting the opening of the flow rate control means according to the amount of exhaust gas, the exhaust gas is reduced to CO as much as possible. 2The system can be operated stably by supplying the exhaust gas to the recovery device. The operating range of the blower can be expanded by narrowing the opening of the exhaust gas flow rate adjustment means.

[0036] (5) A control device according to a fifth aspect is an exhaust gas supply system as defined in (3) to (4), further comprising a circulation system that bypasses the blower downstream of the damper, and a valve provided in the circulation system, wherein the control unit opens the valve when the flow rate of the exhaust gas is lower than the operating range. By opening the valve and circulating the exhaust gas through the circulation system, the operating range of the blower can be expanded.

[0037] (6) A control method according to a sixth aspect of the present invention is a method for reducing exhaust gas discharged from an equipment to CO by a blower. 2 A control method for a system that supplies exhaust gas to a recovery device, comprising the steps of: detecting an operating state of the equipment; determining whether or not a flow rate of the exhaust gas is within an operating range of the blower based on the detected operating state; and operating the blower if the flow rate of the exhaust gas is within the operating range, and stopping the blower if the flow rate of the exhaust gas is outside the operating range.

[0038] (7) The program according to the seventh aspect causes a computer to convert exhaust gas discharged from the equipment into CO by a blower. 2 The system executes a process for controlling a system that supplies to a recovery device, the process including the steps of: detecting the operating state of the equipment; determining whether or not the flow rate of the exhaust gas is within the operating range of the blower based on the detected operating state; and operating the blower if the flow rate of the exhaust gas is within the operating range, and stopping the blower if the flow rate of the exhaust gas is outside the operating range. [Explanation of symbols]

[0039] 1...Upstream equipment 2. IGV 3. GTCC 4. Stack 5...cooling tower 6...Blower 7. Motor 8 CO 2 Recovery device 10. Control device 11. Detection unit 12... Judgment section 13 Control section D1, D2... Damper L1, L2.L3...system 100, 100a, 100b...CO 2 Collection System 900...Computer 901···CPU 902...Main memory 903...Auxiliary storage device 904 Input / Output Interface 905 Communication Interface

Claims

1. The exhaust gas emitted by the equipment is blown into CO ２ A control device for a system for supplying to a recovery device, A detection unit that detects an operating state of the facility; a determination unit that determines whether a flow rate of the exhaust gas is within an operating range of the blower based on the detected operating state; a control unit that starts the blower when the flow rate of the exhaust gas is within the operating range, and stops the blower when the flow rate of the exhaust gas is less than the operating range; A control device comprising:

2. The control unit controls the rotation speed of the blower in accordance with the flow rate of the exhaust gas based on the operating state. The control device according to claim 1 .

3. The exhaust gas discharged from the equipment is CO ２ an exhaust gas system leading to a recovery device; The CO in the exhaust gas system ２ A blower provided upstream of the recovery device; a damper provided upstream of the blower in the exhaust gas system; The control device according to claim 1 or 2; Equipped with The control unit opens the damper when the flow rate of the exhaust gas is within the operating range, and closes the damper when the flow rate of the exhaust gas is less than the operating range. Exhaust gas supply system.

4. a flow rate adjusting means for adjusting the flow rate of the exhaust gas provided between the damper and the blower in the exhaust gas system, The control unit adjusts the opening degree of the flow rate adjustment means in accordance with the flow rate of the exhaust gas based on the operating state. An exhaust gas supply system according to claim 3.

5. The system further includes a circulation system that bypasses the blower downstream of the damper, and a valve provided in the circulation system, The control unit opens the valve when the flow rate of the exhaust gas is less than the operating range. An exhaust gas supply system according to claim 3.

6. A chimney provided upstream of the damper in the exhaust gas system. The exhaust gas supply system of claim 3 further comprising:

7. The exhaust gas emitted by the equipment is blown into CO ２ 1. A method of controlling a system for feeding a recovery device, comprising the steps of: Detecting an operating state of the equipment; determining whether the flow rate of the exhaust gas is within an operating range of the blower based on the detected operating state; operating the blower when the flow rate of the exhaust gas is within the operating range, and shutting down the blower when the flow rate of the exhaust gas is less than the operating range; The control method includes:

8. On the computer, The exhaust gas emitted by the equipment is blown into CO ２ A process for controlling a system for feeding a recovery device, comprising: Detecting an operating state of the equipment; determining whether the flow rate of the exhaust gas is within an operating range of the blower based on the detected operating state; operating the blower when the flow rate of the exhaust gas is within the operating range, and shutting down the blower when the flow rate of the exhaust gas is less than the operating range; A program that executes a process including:

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