Fuel pretreatment system, gas turbine and control method of fuel pretreatment system

Abstract

The application provides a fuel pretreatment system of a gas turbine, the gas turbine and a control method of the fuel pretreatment system of the gas turbine, and the fuel pretreatment system of the gas turbine comprises: a fuel gas pipeline, which is arranged in communication with a fuel inlet; a fuel gas detection device, which is arranged on the fuel gas pipeline and is used for detecting a state parameter of fuel gas in the fuel gas pipeline; a fuel device; a fuel gas branch pipeline, a first end of the fuel gas branch pipeline can be in communication with the fuel gas pipeline, and a second end of the fuel gas branch pipeline is in communication with the fuel device; and a multi-way valve, which is arranged on the fuel gas pipeline and is located downstream of the fuel gas detection device, and the multi-way valve has a first working position for connecting the fuel gas pipeline and the fuel inlet and a second working position for connecting the fuel gas pipeline and the fuel gas branch pipeline. The technical scheme of the application effectively solves the problem that fuel gas which does not meet the requirements of the gas turbine is discharged to a flare system in the related art, thereby causing waste of the fuel gas.

Description

Technical Field

[0001] This invention relates to the field of gas turbine technology, and more specifically, to a fuel pretreatment system for a gas turbine, a gas turbine, and a control method for the fuel pretreatment system for a gas turbine. Background Technology

[0002] The performance and safe operation of a gas turbine are affected by the characteristics and state parameters of the fuel gas. This is especially true for gas turbines using low- to medium-calorific-value fuel gases. When the calorific value, temperature, pressure, and other parameters of the fuel gas do not meet the specific design and operational requirements of the gas turbine, its performance and operational safety will be affected. Only when the calorific value, temperature, pressure, and other parameters of the fuel gas meet the specific design and operational requirements of the gas turbine can the gas turbine safely and efficiently burn the fuel gas to expand and perform work, thereby converting the chemical energy of the fuel into mechanical work and outputting electrical work.

[0003] In related technologies, to ensure that the fuel gas entering the gas turbine meets the specific design and operational requirements of the gas turbine, its state parameters need to be tested before it is introduced into the gas turbine. If the state parameters of the fuel gas do not meet the specific design and operational requirements of the gas turbine, the fuel gas needs to be discharged to a flare system, where it will be combusted and then released into the atmosphere.

[0004] This results in the waste of fuel gas by releasing fuel gas that does not meet the requirements of the gas turbine into the flare system. Summary of the Invention

[0005] The main objective of this invention is to provide a fuel pretreatment system for a gas turbine, a gas turbine, and a control method for the fuel pretreatment system for a gas turbine, in order to solve the problem in related technologies where fuel gas that does not meet the requirements of a gas turbine is discharged into the flare system, resulting in the waste of fuel gas.

[0006] To achieve the above objectives, according to one aspect of the present invention, a fuel pretreatment system for a gas turbine is disposed upstream of the fuel inlet of the gas turbine body. The fuel pretreatment system includes: a fuel gas pipeline connected to the fuel inlet; a fuel gas detection device disposed on the fuel gas pipeline for detecting state parameters of the fuel gas within the fuel gas pipeline; a fuel device; a fuel gas branch, a first end of which is connected to the fuel gas pipeline, and a second end of which is connected to the fuel device; and a multi-way valve disposed on the fuel gas pipeline and downstream of the fuel gas detection device, the multi-way valve having a first working position connecting the fuel gas pipeline to the fuel inlet and a second working position connecting the fuel gas pipeline to the fuel gas branch.

[0007] Furthermore, the gas turbine's fuel pretreatment system also includes a separator and a heat exchanger located on the fuel gas branch line, with the heat exchanger situated upstream of the separator.

[0008] Furthermore, the gas turbine's fuel pretreatment system also includes a compressor, a regulating valve, and a pressure transmitter installed on the fuel gas branch. The compressor is located upstream of the regulating valve, and the pressure transmitter is used to detect the fuel gas pressure in the fuel gas branch. The pressure transmitter is connected to the regulating valve for both signal and control.

[0009] Furthermore, the separator is equipped with a level control valve, which can detect the liquid level in the separator and control the opening and closing of the separator's drain valve.

[0010] Furthermore, the gas turbine's fuel pretreatment system also includes a controller, which is connected to the fuel gas detection equipment and to the multi-way valve control.

[0011] Furthermore, the fuel gas detection equipment includes a calorific value analyzer installed on the fuel gas pipeline. The calorific value analyzer is used to measure the calorific value of the fuel gas and is connected to the controller signal.

[0012] Furthermore, the fuel gas detection device includes a temperature sensor installed on the fuel gas pipeline. The temperature sensor is used to measure the temperature of the fuel gas and is connected to the controller signal.

[0013] Furthermore, the fuel gas detection device includes a pressure sensor installed on the fuel gas pipeline. The pressure sensor is used to measure the pressure of the fuel gas and is connected to the controller signal.

[0014] To achieve the above objectives, according to another aspect of the present invention, a gas turbine is provided, including a gas turbine body and a fuel pretreatment system disposed upstream of the fuel inlet of the gas turbine body, wherein the fuel pretreatment system is the aforementioned fuel pretreatment system for the gas turbine.

[0015] To achieve the above objectives, according to another aspect of the present invention, a control method for a gas turbine fuel pretreatment system is provided, for controlling the aforementioned gas turbine fuel pretreatment system. The control method for the gas turbine fuel pretreatment system includes the following steps:

[0016] The fuel gas is introduced into the fuel gas pipeline;

[0017] The calorific value, temperature, and pressure of the fuel gas in the fuel gas pipeline are detected using fuel gas detection equipment.

[0018] The system determines whether the calorific value of the fuel gas in the fuel gas pipeline is within a preset calorific value range to obtain a first determination result; determines whether the temperature of the fuel gas in the fuel gas pipeline is within a preset temperature range to obtain a second determination result; and determines whether the pressure of the fuel gas in the fuel gas pipeline is within a preset pressure range to obtain a third determination result.

[0019] If the first judgment result, the second judgment result, and the third judgment result are all yes, then control the multi-way valve to be in the first working position, so that the fuel gas is introduced into the fuel inlet of the gas turbine body;

[0020] If at least one of the first, second, and third judgment results is negative, the multi-way valve is controlled to be in the second working position, allowing fuel gas to enter the fuel gas branch.

[0021] According to the technical solution of this invention, the fuel pretreatment system of a gas turbine is located upstream of the fuel inlet of the gas turbine body. The fuel pretreatment system includes: a fuel gas pipeline, a fuel gas detection device, a fuel equipment, a fuel gas branch, and a multi-way valve. The fuel gas pipeline is connected to the fuel inlet. The fuel gas detection device is located on the fuel gas pipeline and is used to detect the state parameters of the fuel gas within the pipeline. A first end of the fuel gas branch is connected to the fuel gas pipeline, and a second end of the fuel gas branch is connected to the fuel equipment. The multi-way valve is located on the fuel gas pipeline and downstream of the fuel gas detection device. The multi-way valve has a first working position connecting the fuel gas pipeline to the fuel inlet and a second working position connecting the fuel gas pipeline to the fuel gas branch. Thus, when fuel gas enters the fuel gas pipeline, the fuel gas detection device can detect the state parameters of the fuel gas to determine whether the fuel gas within the pipeline meets the requirements of the gas turbine. If the fuel gas detection equipment determines that the fuel gas in the pipeline meets the requirements of the gas turbine, it switches the multi-way valve to the first operating position so that the fuel gas in the pipeline can be delivered to the gas turbine body. If the fuel gas detection equipment determines that the fuel gas in the pipeline does not meet the requirements of the gas turbine, it switches the multi-way valve to the second operating position so that the fuel gas in the pipeline can be delivered to the fuel equipment for utilization. Since the fuel equipment has lower requirements for the state parameters of the fuel gas, fuel gas that does not meet the requirements of the gas turbine can be utilized by the fuel equipment, reducing fuel gas waste. Therefore, the technical solution of this application effectively solves the problem in related technologies where fuel gas that does not meet the requirements of the gas turbine is discharged into the flare system, causing fuel gas waste. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 A schematic diagram of pipe connections according to an embodiment of a gas turbine based on the present invention is shown;

[0024] Figure 2 It shows Figure 1 A schematic diagram of the pipeline connections at the fuel gas branch of a gas turbine;

[0025] Figure 3 A flowchart of a control method for a fuel pretreatment system for a gas turbine according to the present invention is shown.

[0026] The above figures include the following reference numerals:

[0027] 10. Gas turbine body;

[0028] 20. Fuel gas pipeline;

[0029] 30. Fuel gas detection equipment;

[0030] 40. Fueling equipment;

[0031] 50. Fuel gas branch line; 51. Separator; 52. Heat exchanger; 53. Compressor; 54. Control valve; 55. Pressure transmitter; 56. Level control valve;

[0032] 60. Multi-way valve. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] like Figure 1 and Figure 2 As shown, in this embodiment, the fuel pretreatment system of the gas turbine is located upstream of the fuel inlet of the gas turbine body 10. The fuel pretreatment system includes: a fuel gas pipeline 20, a fuel gas detection device 30, a fuel equipment 40, a fuel gas branch line 50, and a multi-way valve 60. The fuel gas pipeline 20 is connected to the fuel inlet. The fuel gas detection device 30 is installed on the fuel gas pipeline 20 and is used to detect the state parameters of the fuel gas within the fuel gas pipeline 20. A first end of the fuel gas branch line 50 is connected to the fuel gas pipeline 20, and a second end of the fuel gas branch line 50 is connected to the fuel equipment 40. The multi-way valve 60 is installed on the fuel gas pipeline 20 and located downstream of the fuel gas detection device 30. The multi-way valve 60 has a first working position connecting the fuel gas pipeline 20 to the fuel inlet and a second working position connecting the fuel gas pipeline 20 to the fuel gas branch line 50.

[0037] Thus, when fuel gas enters the fuel gas pipeline 20, the fuel gas detection device 30 can detect the state parameters of the fuel gas to determine whether the fuel gas in the fuel gas pipeline 20 meets the requirements of the gas turbine. If the fuel gas detection device 30 determines that the fuel gas in the pipeline meets the requirements of the gas turbine, it switches the multi-way valve 60 to the first working position so that the fuel gas in the fuel gas pipeline 20 can be delivered to the gas turbine body 10. If the fuel gas detection device 30 determines that the fuel gas in the pipeline does not meet the requirements of the gas turbine, it switches the multi-way valve 60 to the second working position so that the fuel gas in the fuel gas pipeline 20 can be delivered to the fuel equipment 40 for utilization. Since the fuel equipment 40 has lower requirements for the state parameters of the fuel gas, fuel gas that does not meet the requirements of the gas turbine can be utilized by the fuel equipment 40, reducing fuel gas waste. Therefore, the technical solution of this embodiment effectively solves the problem in the related art of fuel gas that does not meet the requirements of the gas turbine being discharged into the flare system, causing fuel gas waste.

[0038] In this embodiment, when the fuel gas pressure, calorific value, temperature, or pressure fluctuation does not meet the requirements of the gas turbine, the multi-way valve 60 is switched to the second operating position. The fuel equipment 40 is equipment with relatively low requirements for the state parameters of the fuel gas, such as a hot blast stove and a boiler.

[0039] like Figure 1 and Figure 2 As shown, the gas turbine fuel pretreatment system also includes a separator 51 and a heat exchanger 52 installed on the fuel gas branch 50, with the heat exchanger 52 located upstream of the separator 51. The heat exchanger 52 effectively cools the fuel gas in the fuel gas branch 50, while the separator 51 effectively separates the condensate from the fuel gas in the fuel gas branch 50, facilitating the utilization of the fuel gas by the subsequent fuel processing equipment 40. Furthermore, placing the heat exchanger 52 upstream of the separator 51 allows the fuel gas to be cooled before entering the separator 51, improving the separation efficiency of the separator 51 in separating condensate from the fuel gas.

[0040] like Figure 1 and Figure 2 As shown, the gas turbine's fuel pretreatment system also includes a compressor 53, a regulating valve 54, and a pressure transmitter 55, all installed on the fuel gas branch 50. The compressor 53 is located upstream of the regulating valve 54. The pressure transmitter 55 detects the fuel gas pressure within the fuel gas branch 50 and is connected to both the regulating valve 54 for signal and control. Thus, the pressure transmitter 55 can detect the pressure of the fuel gas after it has been pressurized by the compressor 53. When the fuel gas pressure does not meet the requirements of the fuel equipment 40, the pressure transmitter 55 controls the opening of the regulating valve 54 to adjust the fuel gas pressure so that it meets the requirements of the fuel equipment 40.

[0041] In this embodiment, a pressure transmitter 55 is installed on the fuel gas branch 50 to detect the pressure within the fuel gas branch 50 in real time and convert it into an electrical signal. The converted electrical signal is transmitted to a control system, such as a PLC or DCS. The control system compares the received pressure signal with the set pressure value and calculates the control command to be executed. The control system sends the control command to the actuator, which in this embodiment is a regulating valve 54. The regulating valve 54 adjusts the valve opening according to the control command, thereby regulating the pressure within the fuel gas branch 50 to reach the set value. The pressure transmitter 55 continuously monitors the pressure within the fuel gas branch 50 and feeds back the real-time data to the control system, forming a closed-loop control to ensure that the pressure remains stable at the set value.

[0042] like Figure 1 and Figure 2 As shown, a liquid level control valve 56 is provided on the separator 51. The liquid level control valve 56 can detect the liquid level in the separator 51 and control the opening and closing of the drain valve of the separator 51. In this way, by setting the liquid level control valve 56, the liquid level in the separator 51 can be maintained within a preset liquid level range, thereby improving the separation efficiency of the separator 51.

[0043] like Figure 1 and Figure 2 As shown, the fuel pretreatment system of the gas turbine also includes a controller, which is signal-connected to the fuel gas detection device 30 and control-connected to the multi-way valve 60. The controller can receive signals from the fuel gas detection device 30 and control the multi-way valve 60 to switch between a first operating position and a second operating position based on the signal from the fuel gas detection device 30 indicating whether the fuel gas meets the requirements of the gas turbine. This simplifies operation and improves work efficiency.

[0044] like Figure 1 and Figure 2 As shown, the fuel gas detection device 30 includes a calorific value analyzer installed on the fuel gas pipeline 20. The calorific value analyzer is used to measure the calorific value of the fuel gas and is connected to the controller via a signal connection. The calorific value analyzer can detect the calorific value parameter of the fuel gas and determine whether the calorific value of the fuel gas meets the requirements of the gas turbine. Based on the determination result of the calorific value analyzer, the controller controls the multi-way valve 60 to switch between a first operating position and a second operating position.

[0045] In this embodiment, the calorific value analyzer includes an infrared gas analyzer, a mass spectrometer, thermocouples, and resistance temperature detectors (RTDs). The infrared gas analyzer works by utilizing the unique absorption spectra of various gaseous components in the fuel gas at specific infrared wavelengths. Using an infrared light source and detector, it identifies and measures the content of different components in the fuel gas by measuring the degree of absorption of infrared light at different wavelengths, thereby calculating the calorific value. The mass spectrometer works by ionizing molecules in the fuel gas and then separating them based on their mass and charge ratio. By analyzing molecules of different masses, the chemical composition of the fuel gas can be determined, thus calculating the calorific value. Thermocouples and RTDs, while primarily used for temperature measurement, can indirectly estimate the calorific value of fuel gas under specific conditions through changes in its combustion temperature.

[0046] like Figure 1 and Figure 2As shown, the fuel gas detection device 30 includes a temperature sensor installed on the fuel gas pipeline 20. The temperature sensor is used to measure the temperature of the fuel gas and is connected to the controller. The temperature sensor can detect the temperature parameter of the fuel gas and determine whether the temperature of the fuel gas meets the requirements of the gas turbine. Based on the determination result of the temperature sensor, the controller controls the multi-way valve 60 to switch between a first operating position and a second operating position.

[0047] like Figure 1 and Figure 2 As shown, the fuel gas detection device 30 includes a pressure sensor installed on the fuel gas pipeline 20. The pressure sensor is used to measure the pressure of the fuel gas and is connected to the controller. The pressure sensor can detect the pressure parameter of the fuel gas and determine whether the pressure of the fuel gas meets the requirements of the gas turbine. Based on the judgment result of the pressure sensor, the controller controls the multi-way valve 60 to switch between a first operating position and a second operating position.

[0048] This application also provides a gas turbine, such as Figure 3 As shown, the gas turbine includes a gas turbine body 10 and a fuel pretreatment system disposed upstream of the fuel inlet of the gas turbine body 10. The fuel pretreatment system is the aforementioned fuel pretreatment system for the gas turbine. Because the aforementioned fuel pretreatment system for the gas turbine can solve the problem in related technologies where fuel gas that does not meet the requirements of the gas turbine is discharged into the flare system, causing fuel gas waste, the gas turbine with this fuel pretreatment system can solve the same technical problem.

[0049] In this embodiment, the gas turbine body 10 is a low- to medium-calorific-value gas turbine. The low- to medium-calorific-value gas turbine is one of the key core components of an integrated gasification combined cycle (IGCC) power plant, and the stability of the calorific value, temperature, and pressure of the fuel gas is crucial for the safe operation of the low- to medium-calorific-value gas turbine.

[0050] This application also provides a control method for a fuel pretreatment system of a gas turbine, used to control the aforementioned fuel pretreatment system of the gas turbine. The control method for the fuel pretreatment system of the gas turbine includes the following steps:

[0051] Fuel gas is introduced into fuel gas pipeline 20;

[0052] The calorific value, temperature and pressure of the fuel gas in the fuel gas pipeline 20 are detected by the fuel gas detection device 30.

[0053] The calorific value of the fuel gas in the fuel gas pipeline 20 is determined to be within a preset calorific value range to obtain a first judgment result; the temperature of the fuel gas in the fuel gas pipeline 20 is determined to be within a preset temperature range to obtain a second judgment result; and the pressure of the fuel gas in the fuel gas pipeline 20 is determined to be within a preset pressure range to obtain a third judgment result.

[0054] If the first judgment result, the second judgment result, and the third judgment result are all yes, then control the multi-way valve 60 to be in the first working position, so that the fuel gas is introduced into the fuel inlet of the gas turbine body 10;

[0055] If at least one of the first, second, and third judgment results is negative, then the multi-way valve 60 is controlled to be in the second working position, allowing fuel gas to enter the fuel gas branch 50.

[0056] Since the aforementioned gas turbine fuel pretreatment system can solve the problem of fuel gas that does not meet the requirements of the gas turbine being discharged into the flare system, resulting in fuel gas waste, the control method of the gas turbine fuel pretreatment system used to control the aforementioned gas turbine fuel pretreatment system can solve the same technical problem.

[0057] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0058] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0059] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fuel pretreatment system for a gas turbine, located upstream of the fuel inlet of the gas turbine body (10), characterized in that, The fuel pretreatment system for the gas turbine includes: A fuel gas pipeline (20) is provided in connection with the fuel inlet; A fuel gas detection device (30) is installed on the fuel gas pipeline (20) and is used to detect the state parameters of the fuel gas in the fuel gas pipeline (20); Fuel equipment (40); A fuel gas branch (50), the first end of which can be connected to the fuel gas pipeline (20), and the second end of which is connected to the fuel equipment (40); A multi-way valve (60) is disposed on the fuel gas pipeline (20) and located downstream of the fuel gas detection device (30). The multi-way valve (60) has a first working position connecting the fuel gas pipeline (20) to the fuel inlet and a second working position connecting the fuel gas pipeline (20) to the fuel gas branch (50).

2. The fuel pretreatment system for a gas turbine according to claim 1, characterized in that, The fuel pretreatment system of the gas turbine also includes a separator (51) and a heat exchanger (52) installed on the fuel gas branch (50), the heat exchanger (52) being located upstream of the separator (51).

3. The fuel pretreatment system for a gas turbine according to claim 2, characterized in that, The fuel pretreatment system of the gas turbine also includes a compressor (53), a regulating valve (54) and a pressure transmitter (55) installed on the fuel gas branch (50). The compressor (53) is located upstream of the regulating valve (54). The pressure transmitter (55) is used to detect the fuel gas pressure in the fuel gas branch (50). The pressure transmitter (55) is signal-connected and control-connected to the regulating valve (54).

4. The fuel pretreatment system for a gas turbine according to claim 2, characterized in that, The separation tank (51) is equipped with a liquid level control valve (56), which can detect the liquid level in the separation tank (51) and control the opening and closing of the drain valve of the separation tank (51).

5. The fuel pretreatment system for a gas turbine according to claim 1, characterized in that, The gas turbine fuel pretreatment system also includes a controller, which is signal-connected to the fuel gas detection device (30) and control-connected to the multi-way valve (60).

6. The fuel pretreatment system for a gas turbine according to claim 5, characterized in that, The fuel gas detection device (30) includes a calorific value analyzer installed on the fuel gas pipeline (20), the calorific value analyzer is used to measure the calorific value of the fuel gas, and the calorific value analyzer is signal-connected to the controller.

7. The fuel pretreatment system for a gas turbine according to claim 5, characterized in that, The fuel gas detection device (30) includes a temperature sensor installed on the fuel gas pipeline (20), the temperature sensor being used to measure the temperature of the fuel gas, and the temperature sensor being signal-connected to the controller.

8. The fuel pretreatment system for a gas turbine according to claim 5, characterized in that, The fuel gas detection device (30) includes a pressure sensor installed on the fuel gas pipeline (20), the pressure sensor being used to measure the pressure of the fuel gas, and the pressure sensor being signal-connected to the controller.

9. A gas turbine, characterized in that, It includes a gas turbine body (10) and a fuel pretreatment system disposed upstream of the fuel inlet of the gas turbine body (10), the fuel pretreatment system being the fuel pretreatment system of the gas turbine according to any one of claims 1 to 8.

10. A control method for a fuel pretreatment system of a gas turbine, characterized in that, A method for controlling a fuel pretreatment system for a gas turbine according to any one of claims 1 to 8, comprising the following steps: Fuel gas is introduced into the fuel gas pipeline (20); The calorific value, temperature and pressure of the fuel gas in the fuel gas pipeline (20) are detected by the fuel gas detection device (30); Determine whether the calorific value of the fuel gas in the fuel gas pipeline (20) is within the preset calorific value range to obtain the first determination result; determine whether the temperature of the fuel gas in the fuel gas pipeline (20) is within the preset temperature range to obtain the second determination result; determine whether the pressure of the fuel gas in the fuel gas pipeline (20) is within the preset pressure range to obtain the third determination result. If the first judgment result, the second judgment result and the third judgment result are all yes, then control the multi-way valve (60) to be in the first working position so that the fuel gas is introduced into the fuel inlet of the gas turbine body (10); If at least one of the first judgment result, the second judgment result, and the third judgment result is negative, then the multi-way valve (60) is controlled to be in the second working position, so that fuel gas is introduced into the fuel gas branch (50).

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