Gas turbine

Abstract

The invention discloses a gas turbine and relates to the technical field of gas turbines. The gas turbine includes: a compressor; a combustion chamber; the air input end of the combustion chamber is communicated with the output end of the air compressor; a high-low pressure turbine; the input end of the high-low pressure turbine is communicated with the output end of the combustion chamber; the air exhaust utilization device is communicated with the output end of the air compressor; the air exhaust utilization device is at least used for reducing the air flow of the output end of the air compressor. Through the arrangement of the air exhaust utilization device, part of compressed air generated by the air compressor can be exhausted, then the flow of air in the high-low-pressure turbine is reduced, and the phenomenon that after the gas turbine is transformed into medium-low-heat-value fuel from high-heat-value fuel, the actual flow of the high-low-pressure turbine exceeds the designed flow, and consequently the gas turbine is blocked is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of gas turbines, and in particular to a gas turbine. Background Art

[0002] A gas turbine is an internal combustion power machine that uses a continuously flowing gas as a working fluid to drive the turbine to rotate at high speed, converting the energy of the fuel into useful work. It is a rotating impeller heat engine. Figure 1 As shown, the existing gas turbine consists of a compressor, a combustion chamber and high and low pressure turbines. When in use, fuel is input into the combustion chamber, and the compressor inputs compressed air into the combustion chamber. The air and fuel form a mixed gas and burn in the combustion chamber to produce high-temperature combustion gas, and the high-temperature combustion gas further drives the high and low pressure turbines to rotate and do work. The design fuel of the gas turbine is generally a high calorific value fuel (for example, natural gas, heavy oil or diesel, etc.). In order to meet environmental protection requirements, some existing gas turbines need to be converted to burn medium and low calorific value fuels (for example, converter gas, biomass pyrolysis gas or hydrogen, etc.). It should be clear that since the energy contained in medium and low calorific value fuels is low, if a gas turbine with high calorific value fuel is converted into a gas turbine with medium and low calorific value fuel, in order to ensure that the gas turbine is running at full or high working conditions, the fuel flow rate needs to be increased. If the fuel flow rate increases, the flow rate of the mixed gas will increase, that is, the flow rate of the high and low pressure turbines will increase, which will cause the high and low pressure turbines to be blocked at the least, and damage the high and low pressure turbines at the worst. In order to solve this technical problem, the common practice is to operate the gas turbine under medium and low operating conditions. If the gas turbine operates under medium and low operating conditions, the working efficiency of the gas turbine is low. Summary of the invention

[0003] The purpose of the present application is to provide a gas turbine to solve the technical problem in the prior art that after the gas turbine is modified for medium and low calorific value fuels, the gas turbine is prone to blockage due to excessive flow at high operating conditions.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A gas turbine, comprising:

[0006] Compressor;

[0007] a combustion chamber; the air input end of the combustion chamber being connected to the output end of the compressor;

[0008] High and low pressure turbines; the input ends of the high and low pressure turbines are connected to the output ends of the combustion chamber;

[0009] The air extraction and utilization device is connected to the output end of the compressor; the air extraction and utilization device is at least used to reduce the air flow at the output end of the compressor.

[0010] As a specific solution in the technical solution of this application, the air extraction and utilization device includes:

[0011] Power turbine;

[0012] a first connecting pipe; a first end of the first connecting pipe is connected to the output end of the compressor, and a second end of the first connecting pipe is connected to the input end of the power turbine;

[0013] The first control valve is arranged on the first connecting pipe.

[0014] As a specific solution in the technical solution of the present application, the exhaust gas utilization device also includes a waste heat recovery component, and the input end of the waste heat recovery component is connected to the output end of the power turbine.

[0015] As a specific solution in the technical solution of the present application, the waste heat recovery component includes a heat exchanger or a waste heat boiler.

[0016] As a specific solution in the technical solution of the present application, the output ends of the high- and low-pressure turbines are connected to the input ends of the power turbine.

[0017] As a specific solution in the technical solution of this application, the air extraction and utilization device also includes:

[0018] a first heat exchanger;

[0019] a second connecting pipe; a first end of the second connecting pipe is connected to the output end of the compressor, and a second end of the second connecting pipe is connected to the heat medium input end of the first heat exchanger;

[0020] A second control valve, disposed on the second connecting pipe;

[0021] An expansion valve is arranged at the heat medium output end of the first heat exchanger.

[0022] As a specific solution in the technical solution of the present application, the air extraction and utilization device also includes a vent pipe, one end of which is connected to the output end of the compressor, and the vent pipe is provided with a third control valve.

[0023] As a specific solution in the technical solution of this application, the air extraction and utilization device also includes:

[0024] Expander;

[0025] a third connecting pipe; a first end of the third connecting pipe is connected to the output end of the compressor, and a second end of the third connecting pipe is connected to the input end of the expander;

[0026] The fourth control valve is arranged on the third connecting pipe.

[0027] As a specific solution in the technical solution of this application, the air extraction and utilization device also includes:

[0028] A second heat exchanger; the heat medium input end of the second heat exchanger is connected to the second end of the third connecting pipe;

[0029] An air storage tank; the input end of the air storage tank is connected to the heat medium output end of the second heat exchanger;

[0030] A third heat exchanger; the refrigerant input end of the third heat exchanger is connected to the output end of the gas storage tank, and the refrigerant output end of the third heat exchanger is connected to the input end of the expander;

[0031] A heat storage tank; the input end of the heat storage tank is connected to the refrigerant output end of the second heat exchanger, and the output end of the heat storage tank is connected to the heat medium input end of the third heat exchanger;

[0032] The input end of the cold storage tank is connected to the heat medium output end of the third heat exchanger, and the output end of the cold storage tank is connected to the refrigerant input end of the second heat exchanger.

[0033] As a specific solution in the technical solution of the present application, the gas extraction and utilization device also includes a fourth connecting pipe, the first end of the fourth connecting pipe is connected to the second end of the third connecting pipe, and the second end of the fourth connecting pipe is connected to the input end of the expander; the fourth connecting pipe is also provided with a fifth control valve.

[0034] Compared with the prior art, the beneficial effects of this application are:

[0035] The present application can discharge part of the compressed air generated by the compressor through the setting of the air extraction and utilization device, thereby reducing the flow rate of the gas in the high- and low-pressure turbines, and avoiding the phenomenon of blockage caused by the actual flow rate of the high- and low-pressure turbines exceeding the design flow rate after the gas turbine is converted from high-calorific value fuel to medium- and low-calorific value fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a gas turbine in the prior art;

[0037] Figure 2 A schematic diagram of the structure of a gas turbine proposed in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the structure of another gas turbine proposed in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of another gas turbine proposed in an embodiment of the present application;

[0040] Figure 5 This is a schematic diagram of the structure of another gas turbine proposed in an embodiment of the present application.

[0041] In the figure: 1. compressor; 101. air; 102. fuel; 103. combustion exhaust gas; 104. cold air; 2. high and low pressure turbines; 3. combustion chamber; 4. air extraction and utilization device; 401. first connecting pipe; 402. first control valve; 403. power turbine; 404. waste heat recovery component; 405. second connecting pipe; 406. second control valve; 407. vent pipe; 408. third control valve; 409. first heat exchanger; 410. expansion valve; 411. third connecting pipe; 412. fourth control valve; 413. second heat exchanger; 414. air storage tank; 415. third heat exchanger; 416. hot storage tank; 417. cold storage tank; 418. expander; 419. fourth connecting pipe; 420. fifth control valve. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] It should be noted that, in the description of the present application, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0044] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0045] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not require further detailed discussion and description in the description of the subsequent drawings.

[0046] It should be clear that the gas flow rate of the gas turbine entering the high and low pressure turbine 2 is jointly determined by the air flow rate and the fuel flow rate. In the application scenario of high operating conditions, the flow rate of air 101 from the compressor 1 is basically fixed. In order to maintain high operating conditions, the required flow rate of medium and low calorific value fuels is larger than that of high calorific value fuels. In other words, in the application scenario of converting the gas turbine from high calorific value fuel to medium and low calorific value fuel, if the gas turbine is in a high operating condition, the actual flow rate of the high and low pressure turbines 2 of the gas turbine is likely to exceed the design flow rate and be blocked due to the relatively large input fuel flow rate.

[0047] In order to solve the technical problem that after the gas turbine using high calorific value fuel is transformed into a gas turbine using medium and low calorific value fuel as mentioned in the background technology, the gas turbine is prone to blockage due to excessive flow at high operating conditions, the present application proposes a gas turbine, which includes a compressor 1, a high-pressure and low-pressure turbine 2, a combustion chamber 3 and an air extraction and utilization device 4. Among them, the air input end of the combustion chamber 3 is connected to the output end of the compressor 1. The input end of the high-pressure and low-pressure turbine 2 is connected to the output end of the combustion chamber 3. The air extraction and utilization device 4 is connected to the output end of the compressor 1, and the air extraction and utilization device 4 is at least used to reduce the air flow at the output end of the compressor 1.

[0048] In this embodiment, in order to prevent the high- and low-pressure turbines 2 from being blocked when the gas turbine is in a high operating condition, this embodiment discharges part of the compressed air in the compressor 1 through the air extraction device 4 to reduce the air flow entering the high- and low-pressure turbines 2. It is easy to understand that if the flow of air entering the high- and low-pressure turbines 2 can be controlled, the total gas flow in the high- and low-pressure turbines 2 under high operating conditions can be controlled. That is, it can avoid the phenomenon of blocking due to the actual flow of the high- and low-pressure turbines 2 in the gas turbine exceeding the designed flow under high operating conditions. At the same time, it should be noted that if the flow in the combustion chamber is reduced, that is, the gas pressure in the combustion chamber is reduced, the energy consumption of inputting fuel 102 into the combustion chamber can also be reduced.

[0049] In the embodiment of the present application, the air extraction and utilization device 4 can be any device capable of discharging part of the compressed air from the output end of the compressor 1. For example, the air extraction and utilization device can be any one of the following three embodiments, or a combination of multiple thereof.

[0050] Example 1 of the air extraction and utilization device

[0051] In this embodiment, the air extraction and utilization device 4 includes a first connecting pipe 401, a first control valve 402 and a power turbine 403. Figure 2 As shown, the first end of the first connecting pipe 401 is connected to the output end of the compressor 1, and the second end of the first connecting pipe 401 is connected to the input end of the power turbine 403. The first control valve 402 is disposed on the first connecting pipe 401.

[0052] When using, Figure 2 As shown, if the gas flow in the high- and low-pressure turbines 2 is too large, the first control valve 402 can be opened, and further, part of the compressed air at the output end of the compressor 1 enters the power turbine 403 to drive the power turbine 403 to perform work.

[0053] It should be noted that the flue gas discharged from the high and low pressure turbine 2 still contains a portion of energy that cannot be utilized by the high and low pressure turbine 2. In order to improve the overall energy conversion rate of the gas turbine, in this embodiment, the output end of the high and low pressure turbine 2 can be connected to the input end of the power turbine 403. Figure 2 As shown, if the output end of the high- and low-pressure turbine 2 is connected to the input end of the power turbine 403, the flue gas discharged from the high- and low-pressure turbine 2 can still drive the power turbine 403 to do work, thereby improving the energy conversion rate of the gas turbine.

[0054] In order to further improve the energy conversion rate of the gas turbine, in this embodiment, the exhaust gas utilization device 4 may also include a waste heat recovery component 404, and the input end of the waste heat recovery component 404 is connected to the output end of the power turbine 403.

[0055] In the embodiment of the present application, the waste heat recovery component 404 may be any component that can utilize the waste heat of the gas exhausted from the output end of the power turbine 403. For example, the waste heat recovery component 404 may be a heat exchanger or a waste heat boiler.

[0056] When using, Figure 2 As shown, after the gas discharged from the output end of the power turbine 403 enters the waste heat recovery component 404 , the waste heat contained therein is absorbed and utilized, and the combustion exhaust gas 103 that has absorbed all the waste heat is discharged from the output end of the waste heat recovery component 404 .

[0057] Example 2 of the air extraction and utilization device

[0058] Before understanding this embodiment, it should be clear that the principle of the heat exchanger is to achieve heat exchange through heat transfer, thereby completing the temperature regulation of the two fluids. Specifically, the heat exchanger is usually composed of two fluid channels, which are a heat medium fluid channel and a refrigerant fluid channel. During operation, the heat medium (for example, high-temperature flue gas or high-pressure air) enters the heat medium fluid channel through the heat medium input end, and the refrigerant (for example, water) enters the refrigerant fluid channel through the refrigerant input end. When the refrigerant flows in the refrigerant fluid channel, it absorbs the heat energy of the heat medium in the heat medium fluid channel, and then the temperature of the refrigerant increases and the temperature of the heat medium decreases. Furthermore, the refrigerant that has completed heat absorption (for example, water absorbs heat and converts it into water vapor) is output from the refrigerant output end of the heat exchange device; the heat medium that has completed heat release (for example, low-temperature flue gas or low-pressure air) is output from the heat medium output end of the heat exchange device. That is to say, each heat exchanger (for example, the first heat exchanger 409, the second heat exchanger 413 and the third heat exchanger 415 below) has four ports, namely the heat medium input port, the heat medium output port, the refrigerant input port and the refrigerant output port. This is a mature technology and will not be elaborated later.

[0059] In this embodiment, the gas extraction and utilization device 4 further includes a second connecting pipe 405, a second control valve 406 and a first heat exchanger 409. Figure 3 As shown, the first end of the second connecting pipe 405 is connected to the output end of the compressor 1 , and the second end of the second connecting pipe 405 is connected to the heat medium input end of the first heat exchanger 409 . The second control valve 406 is disposed on the second connecting pipe 405 .

[0060] When using, Figure 3 As shown, if the gas flow in the high- and low-pressure turbines 2 is too large, the second control valve 406 can be opened. Furthermore, part of the compressed air at the output end of the compressor 1 enters the first heat exchanger 409 to release heat. The compressed air passing through the first heat exchanger 409 becomes high-pressure and normal-temperature air. When the air flows through the expansion valve 410, it is throttled, expanded, and cooled, and finally forms low-pressure and low-temperature cold air 104.

[0061] It should be clear that during the use of the gas turbine, cooling air is required to cool some parts. That is to say, in this embodiment, cold air 104 can be introduced into the cooling flow channel of the gas turbine to cool the parts of the gas turbine and auxiliary machines to reduce the energy consumption of the gas turbine cooling air transportation. When in use, the heat released by the first heat exchanger 409 can be dissipated into the ambient air, or it can be used for heat supply or heating. When in use, the cold air 104 can be directly connected to the input end of the compressor 1, or connected to the intermediate stage of the compressor 1, so as to reduce the temperature of the air at the input end of the compressor 1. When in use, the cold air 104 can also provide cooling capacity for offices or residential places.

[0062] When in use, the flow rate and temperature of the cold air 104 can be controlled by adjusting the opening of the expansion valve 410. In this embodiment, the expansion valve 410 can be a throttling pressure reducing valve or a capillary tube.

[0063] It should be noted that the higher the intake air temperature of the compressor 1 is, the greater the power consumption of the compressor 1 is under the same pressure ratio condition, and the output power of the gas turbine is also lower under the same material temperature resistance limit. In order to control the temperature and pressure of the air at the input end of the compressor 1, that is, to control the output power of the gas turbine, in one embodiment of the present application, Figure 3 As shown, the output end of the expansion valve 410 can be connected to the input end of the compressor 1. When in use, the air temperature at the input end of the compressor 1 can be controlled by controlling the heat release of the first heat exchanger 409; the air pressure at the input end of the compressor 1 can be controlled by controlling the opening of the expansion valve 410.

[0064] In order to avoid the damage of the air extraction and utilization device 4 due to the excessive flow rate of compressed air (that is, excessive pressure) in the air extraction and utilization device 4, or when the parts in the air extraction and utilization device 4 are under maintenance and do not need air intake, in this embodiment, Figure 3 As shown, the air extraction and utilization device 4 may further include a vent pipe 407 , one end of which is connected to the output end of the compressor 1 , and the vent pipe 407 is provided with a third control valve 408 .

[0065] During use, if the flow rate of compressed air in the air extraction and utilization device 4 is too large, the third control valve 408 can be opened. If the third control valve 408 is opened, part or all of the compressed air in the air extraction and utilization device 4 can be discharged from the air extraction and utilization device 4 through the vent pipe 407, that is, the air pressure in the air extraction and utilization device 4 is reduced, thereby preventing the air extraction and utilization device 4 from being damaged. In this embodiment, the third control valve 408 can be a safety valve.

[0066] Example 3 of the air extraction and utilization device

[0067] In this embodiment, the gas extraction and utilization device 4 includes a third connecting pipe 411, a fourth control valve 412 and an expander 418. Figure 4 As shown, the first end of the third connecting pipe 411 is connected to the output end of the compressor 1, and the second end of the third connecting pipe 411 is connected to the input end of the expander 418. The fourth control valve 412 is disposed on the third connecting pipe 411.

[0068] When using, Figure 4 As shown, if the gas flow in the high- and low-pressure turbines 2 is too large, the fourth control valve 412 can be opened. Further, part of the compressed air at the output end of the compressor 1 enters the expander 418 to drive the expander 418 to perform work.

[0069] In order to store the energy of the compressed air outputted from the output end of the compressor 1, in this embodiment, the air extraction and utilization device 4 may further include a second heat exchanger 413, an air storage tank 414, a third heat exchanger 415, a hot storage tank 416 and a cold storage tank 417. Figure 5 As shown, the heat medium input end of the second heat exchanger 413 is connected to the second end of the third connecting pipe 411. The input end of the gas storage tank 414 is connected to the heat medium output end of the second heat exchanger 413. The refrigerant input end of the third heat exchanger 415 is connected to the output end of the gas storage tank 414, and the refrigerant output end of the third heat exchanger 415 is connected to the input end of the expander 418. The input end of the hot storage tank 416 is connected to the refrigerant output end of the second heat exchanger 413, and the output end of the hot storage tank 416 is connected to the heat medium input end of the third heat exchanger 415. The input end of the cold storage tank 417 is connected to the heat medium output end of the third heat exchanger 415, and the output end of the cold storage tank 417 is connected to the refrigerant input end of the second heat exchanger 413.

[0070] When using, Figure 5 As shown, if the gas flow in the high- and low-pressure turbines 2 is too large, the fourth control valve 412 can be opened. Further, part of the compressed air at the output end of the compressor 1 enters the heat medium fluid channel of the second heat exchanger 413 through the heat medium input end of the second heat exchanger 413; the heat exchange medium in the cold storage tank 417 enters the refrigerant fluid channel of the second heat exchanger 413 through the refrigerant input end of the second heat exchanger 413. Further, the compressed air and the heat exchange medium in the second heat exchanger 413 can form heat exchange. After the compressed air undergoes heat exchange in the second heat exchanger 413, it becomes high-pressure and low-temperature air, and enters the air storage tank 414 from the heat medium output end of the second heat exchanger 413; after the heat exchange in the second heat exchanger 413, the temperature of the heat exchange medium increases, and enters the hot storage tank 416 from the refrigerant output end of the second heat exchanger 413. As shown Figure 5 As shown, if the energy of the high-pressure air stored in the gas storage tank 414 needs to be released, the heat exchange medium in the hot storage tank 416 is input into the heat medium fluid channel of the third heat exchanger 415 through the heat medium input end of the third heat exchanger 415, and the high-pressure low-temperature air in the gas storage tank 414 is input into the refrigerant fluid channel of the third heat exchanger 415 through the refrigerant input end of the third heat exchanger 415. Further, the low-temperature air and the heat exchange medium in the third heat exchanger 415 can form heat exchange. After the low-temperature air is heat exchanged in the third heat exchanger 415, it becomes high-pressure and high-temperature air, enters the expander 418, and drives the expander 418 to do work; after the heat exchange medium is heat exchanged in the third heat exchanger 415, the temperature is reduced, and it enters the cold storage tank 417 from the heat medium output end of the third heat exchanger 415.

[0071] In this embodiment, the heat exchange medium may be any fluid that can perform heat exchange and energy storage, for example, the heat exchange medium may be water, oil, or molten salt.

[0072] In order to directly utilize the compressed air from the output end of the compressor 1, in one embodiment of the present application, Figure 5 As shown, the gas extraction and utilization device 4 also includes a fourth connecting pipe 419, a first end of the fourth connecting pipe 419 is connected to the second end of the third connecting pipe 411, and a second end of the fourth connecting pipe 419 is connected to the input end of the expander 418; the fourth connecting pipe 419 is also provided with a fifth control valve 420.

[0073] When in use, if it is necessary to directly utilize the compressed air from the output end of the compressor 1, the fourth control valve 412 is closed and the fifth control valve 420 is opened. Furthermore, part of the compressed air from the output end of the compressor 1 can directly enter the expander 418 through the fourth connecting pipe 419 to drive the expander 418 to perform work.

[0074] It should be clear that the embodiment of the gas turbine proposed in the present application can discharge part of the compressed air generated by the compressor through the setting of the exhaust utilization device, thereby reducing the flow rate of the gas in the high and low pressure turbines, and avoiding the phenomenon that the actual flow rate of the high and low pressure turbines exceeds the design flow rate and causes blockage after the gas turbine is converted from high calorific value fuel to medium and low calorific value fuel.

[0075] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A gas turbine, characterized in that: include: Compressor (1); A combustion chamber (3); an air input end of the combustion chamber (3) is connected to an output end of the compressor (1); A high-pressure and low-pressure turbine (2); the input end of the high-pressure and low-pressure turbine (2) is connected to the output end of the combustion chamber (3); An air extraction and utilization device (4) is connected to the output end of the compressor (1); the air extraction and utilization device (4) is at least used to reduce the air flow rate at the output end of the compressor (1).

2. The gas turbine according to claim 1, characterized in that The air extraction and utilization device (4) comprises: Power turbine (403); a first connecting pipe (401); a first end of the first connecting pipe (401) is connected to an output end of the compressor (1), and a second end of the first connecting pipe (401) is connected to an input end of the power turbine (403); The first control valve (402) is arranged on the first connecting pipe (401).

3. The gas turbine according to claim 2, characterized in that The air extraction and utilization device (4) further comprises a waste heat recovery component (404), wherein the input end of the waste heat recovery component (404) is connected to the output end of the power turbine (403).

4. The gas turbine according to claim 3, characterized in that The waste heat recovery component (404) includes a heat exchanger or a waste heat boiler.

5. The gas turbine according to claim 2, characterized in that The output end of the high- and low-pressure turbine (2) is connected to the input end of the power turbine (403).

6. The gas turbine according to any one of claims 1 to 5, characterized in that The air extraction and utilization device (4) further comprises: a first heat exchanger (409); a second connecting pipe (405); a first end of the second connecting pipe (405) is connected to an output end of the compressor (1), and a second end of the second connecting pipe (405) is connected to a heat medium input end of the first heat exchanger (409); A second control valve (406), disposed on the second connecting pipe (405); An expansion valve (410) is arranged at the heat medium output end of the first heat exchanger (409); the output end of the expansion valve (410) is connected to the input end of the compressor (1).

7. The gas turbine according to claim 6, characterized in that The air extraction and utilization device (4) further comprises a vent pipe (407), one end of which is connected to the output end of the compressor (1), and the vent pipe (407) is provided with a third control valve (408).

8. The gas turbine according to claim 6, characterized in that The air extraction and utilization device (4) further comprises: Expander (418); a third connecting pipe (411); a first end of the third connecting pipe (411) is connected to an output end of the compressor (1), and a second end of the third connecting pipe (411) is connected to an input end of the expander (418); The fourth control valve (412) is arranged in the third connecting pipe (411).

9. The gas turbine according to claim 8, characterized in that The air extraction and utilization device (4) further comprises: A second heat exchanger (413); a heat medium input end of the second heat exchanger (413) is connected to a second end of the third connecting pipe (411); An air storage tank (414); an input end of the air storage tank (414) is connected to a heat medium output end of the second heat exchanger (413); a third heat exchanger (415); a refrigerant input end of the third heat exchanger (415) is connected to an output end of the gas storage tank (414), and a refrigerant output end of the third heat exchanger (415) is connected to an input end of the expander (418); a heat storage tank (416); an input end of the heat storage tank (416) is connected to a refrigerant output end of the second heat exchanger (413), and an output end of the heat storage tank (416) is connected to a heat medium input end of the third heat exchanger (415); A cold storage tank (417); the input end of the cold storage tank (417) is connected to the heat medium output end of the third heat exchanger (415), and the output end of the cold storage tank (417) is connected to the cold medium input end of the second heat exchanger (413).

10. The gas turbine according to claim 9, characterized in that The gas extraction and utilization device (4) further comprises a fourth connecting pipe (419), a first end of the fourth connecting pipe (419) being connected to the second end of the third connecting pipe (411), and a second end of the fourth connecting pipe (419) being connected to an input end of the expander (418); the fourth connecting pipe (419) is also provided with a fifth control valve (420).

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