Ignition gas supply device, ignition gas supply method, and gas turbine system

Abstract

This application provides an ignition gas supply device, an ignition gas supply method for a gas turbine, and a gas turbine system. The ignition gas supply device, used to supply ignition gas to a gas turbine, includes: a storage tank for storing liquid gaseous fuel; a booster pump, connected to the storage tank, for pressurizing the liquid gaseous fuel; a vaporizer, connected to the booster pump, for heating and vaporizing the liquid gaseous fuel; a buffer tank, connected to the vaporizer, for storing gaseous fuel; a pressure transmitter mounted on the buffer tank for detecting pressure; a temperature transmitter mounted on the buffer tank for detecting temperature; and a gas supply pipeline, one end of which is connected to the buffer tank and the other end of which is connected to the gas turbine, the gas supply pipeline delivering the gaseous fuel in the buffer tank as the ignition gas. The solution of this application can provide the gas turbine with ignition gas that meets the requirements in terms of temperature, pressure, and gas production.

Description

Technical Field

[0001] This application relates to the field of gas turbine technology, and in particular to an ignition gas supply device, an ignition gas supply method for a gas turbine, and a gas turbine system. Background Technology

[0002] In some countries and regions with underdeveloped power systems, the simplest solution is to use gas turbines to drive generators for power generation, grid connection, and peak shaving.

[0003] When a gas turbine cannot ignite the main fuel using a spark, other ignition gases are needed to ignite the main fuel in order to reach the gas turbine's self-sustaining minimum stable speed.

[0004] Currently, the conventional method of supplying ignition gas is to use natural gasification to supply gas to the gas turbine. However, for gas turbines, especially large gas turbines, if this method is used, not only will the gas produced fail to meet the gas turbine's intake requirements in terms of temperature and pressure, but it will also fail to provide the gas consumption per unit time required by the gas turbine. Summary of the Invention

[0005] The purpose of this application is to provide an ignition gas supply device, an ignition gas supply method for a gas turbine, and a gas turbine system, to solve the problem that existing gas supply methods cannot meet the ignition and start-up requirements of gas turbines in terms of gas temperature, pressure, and gas production.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0007] This application first provides an ignition gas supply device for supplying ignition gas to a gas turbine, comprising:

[0008] Storage tanks are used to store liquid gaseous fuels;

[0009] A booster pump, connected to the storage tank, is used to pressurize the liquid gaseous fuel from the storage tank;

[0010] A vaporizer, connected to the booster pump, is used to heat and vaporize the liquid gaseous fuel from the booster pump.

[0011] A buffer tank, connected to the vaporizer, is used to store gaseous fuel from the vaporizer;

[0012] A first pressure transmitter is installed on the buffer tank and is used to detect the pressure of the gaseous fuel in the buffer tank;

[0013] A first temperature transmitter is installed on the buffer tank and is used to detect the temperature of the gaseous fuel inside the buffer tank;

[0014] The gas supply pipeline has one end connected to the buffer tank and the other end connected to the gas turbine. The gas supply pipeline delivers the gaseous fuel in the buffer tank as the ignition gas.

[0015] According to one embodiment of this application, the ignition gas supply device further includes:

[0016] A filter is connected to the buffer tank, and the gas supply pipeline is connected to the buffer tank via the filter. The filter is used to perform filtration and gas-liquid separation treatment on the gaseous fuel from the buffer tank.

[0017] According to one embodiment of this application, the ignition gas supply device includes a plurality of filters and a plurality of gas supply lines, each filter being connected to the buffer tank and each gas supply line being connected to the corresponding filter.

[0018] According to one embodiment of this application, the ignition gas supply device further includes:

[0019] The second pressure transmitter is located at the end of the gas supply pipeline furthest from the filter and is used to detect the pressure of the gaseous fuel in the gas supply pipeline.

[0020] A second temperature transmitter, located at the end of the gas supply pipeline furthest from the filter, is used to detect the temperature of the gaseous fuel within the gas supply pipeline; and

[0021] A valve is installed on the gas supply pipeline and on the side of the second pressure transmitter and the second temperature transmitter away from the filter, for controlling the flow of the gas supply pipeline.

[0022] According to one embodiment of this application, the ignition gas supply device further includes a controller, which is electrically connected to the first pressure transmitter and the first temperature transmitter respectively. The controller is used to receive the pressure signal fed back by the first pressure transmitter and the temperature signal fed back by the first temperature transmitter.

[0023] The controller is electrically connected to the booster pump and the vaporizer respectively, and controls the temperature and pressure of the gaseous fuel in the buffer tank through the booster pump and the vaporizer.

[0024] According to one embodiment of this application, the controller is electrically connected to the second pressure transmitter and the second temperature transmitter respectively. The controller is used to receive the pressure signal fed back by the second pressure transmitter and the temperature signal fed back by the second temperature transmitter. The controller is also electrically connected to the valve and is used to control the opening and closing of the valve.

[0025] According to one embodiment of this application, the ignition gas supply device further includes:

[0026] A heat tracing line is laid on at least a portion of the ignition gas supply device for heat preservation of at least a portion of the ignition gas supply device.

[0027] According to one embodiment of this application, the ignition gas supply device is integrated into a skid-mounted device.

[0028] According to one embodiment of this application, the vaporizer is an electrically heated oil bath vaporizer.

[0029] This application also provides a method for supplying ignition gas to a gas turbine, the method comprising:

[0030] Storing liquid gaseous fuels;

[0031] The liquid gaseous fuel is pressurized;

[0032] The pressurized liquid gaseous fuel is heated and vaporized to obtain gaseous fuel.

[0033] The gaseous fuel is buffered so that the pressure and temperature of the buffered gaseous fuel are maintained at corresponding set values;

[0034] The buffered gaseous fuel is supplied to the gas turbine as an ignition gas.

[0035] According to one embodiment of this application, the step of buffering the gaseous fuel to maintain the pressure and temperature of the buffered gaseous fuel at corresponding set values ​​includes:

[0036] The temperature and pressure of the buffered gaseous fuel are monitored;

[0037] Based on the detected temperature and pressure, the liquid gaseous fuel is pressurized, heated, and vaporized to maintain the pressure and temperature of the buffered gaseous fuel at the corresponding set values.

[0038] According to one embodiment of this application, it also includes:

[0039] When the pressure and temperature of the gaseous fuel in the gas supply pipeline near the gas turbine are both within the corresponding set range, the gaseous fuel is supplied to the gas turbine.

[0040] This application also provides a gas turbine system, including:

[0041] Gas turbines; and

[0042] The ignition gas supply device described above is connected to the ignition gas inlet of the gas turbine.

[0043] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0044] Regarding the ignition gas supply device, ignition gas supply method, and gas turbine system provided in this application, the liquid gaseous fuel from the storage tank is pressurized by a booster pump and heated and vaporized by a vaporizer. The resulting gaseous fuel enters a buffer tank for storage, and can be supplied to the gas turbine via a gas supply pipeline connected to the buffer tank. Compared with natural gasification, this method increases the pressure and temperature of the generated gaseous fuel. Furthermore, the first pressure transmitter and first temperature transmitter installed on the buffer tank can be used to detect the pressure and temperature of the gaseous fuel in the buffer tank, respectively. Therefore, by controlling the booster pump and vaporizer, the pressure and temperature of the gaseous fuel in the buffer tank can be controlled to reach the corresponding set values, thereby providing the gas turbine with ignition gas that meets the ignition start-up requirements in terms of temperature, pressure, and gas production. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the ignition gas supply device in an exemplary embodiment of this application;

[0046] Figure 2 This is a block diagram illustrating the temperature control principle of the controller for the gaseous fuel in the buffer tank in an exemplary embodiment of this application.

[0047] Figure 3 This is a flowchart illustrating the ignition and start-up method of a gas turbine in an exemplary embodiment of this application.

[0048] The following are the descriptions of the reference numerals:

[0049] 10-Ignition gas supply device; 11-Storage tank; 12-Booster pump; 13-Vaporizer; 14-Buffer tank; 141-First pressure transmitter; 142-First temperature transmitter; 15, 16-Filters; 151, 161-Second pressure transmitter; 152, 162-Second temperature transmitter; 153, 163-Valve; 154, 164-Gas supply line; 17-Controller; 171-Comparison mechanism; 172-Control device. Detailed Implementation

[0050] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0051] According to one aspect of this application, an ignition gas supply device is first provided for supplying ignition gas to a gas turbine.

[0052] Figure 1 This is a schematic diagram of the ignition gas supply device in an exemplary embodiment of this application, with reference to... Figure 1 As shown, the ignition gas supply device 10 includes a storage tank 11 for storing liquid gaseous fuel, which can be liquefied petroleum gas (LPG) or liquefied natural gas (LNG). When the liquid gaseous fuel is LPG, the gas supply device 10 can supply LPG as the ignition gas to the gas turbine; similarly, when the liquid gaseous fuel is LNG, the gas supply device 10 can supply LNG as the ignition gas to the gas turbine. The liquid gaseous fuel stored in the storage tank can be supplied and replenished by tank trucks.

[0053] Continue to refer to Figure 1 The ignition gas supply device 10 also includes a booster pump 12, a vaporizer 13, and a buffer tank 14. The booster pump 12 is connected to the storage tank 11 via a transmission pipeline. The storage tank 11, which stores liquid gas fuel, has a certain pressure. After the liquid gas fuel in the storage tank 11 is input to the booster pump 12 via the transmission pipeline, the booster pump 12 pressurizes the liquid gas fuel from the storage tank 11.

[0054] The vaporizer 13 is connected to the booster pump 12 via a transmission pipeline. The liquid gaseous fuel from the booster pump 12 enters the vaporizer 13 through the transmission pipeline and is then heated and vaporized by the vaporizer 13. Specifically, the vaporizer 13 can be an electrically heated oil bath vaporizer, which can perform forced vaporization and heating of the liquid gaseous fuel.

[0055] The buffer tank 14 is connected to the vaporizer 13 via a transmission pipeline. After passing through the vaporizer 13, the liquid gaseous fuel is converted into gaseous fuel. The buffer tank 14 is used to store the gaseous fuel from the vaporizer 13.

[0056] Please refer to Figure 1 The ignition gas supply device 10 also includes a first pressure transmitter 141 and a first temperature transmitter 142. The first pressure transmitter 141 and the first temperature transmitter 142 are both mounted on the buffer tank 14. The first pressure transmitter 141 is used to detect the pressure of the gaseous fuel in the buffer tank 14, while the first temperature transmitter 142 is used to detect the temperature of the gaseous fuel in the buffer tank 14.

[0057] In this way, the user can observe the pressure and temperature detected by the first pressure transmitter 141 and the first temperature transmitter 142. When the frequency of the booster pump 12 and the power of the vaporizer 13 can be controlled by setting the corresponding switches, the user can manually adjust the frequency of the booster pump 12 and the power of the vaporizer 13 to keep the pressure and temperature of the gaseous fuel in the buffer tank 14 at the corresponding set values.

[0058] exist Figure 1 In this device, the ignition gas supply unit 10 also includes a gas supply line 154. One end of the gas supply line 154 is connected to the buffer tank 14, and the other end is connected to the gas turbine. Therefore, the gas supply line 154 can transport the gaseous fuel in the buffer tank 14 as ignition gas. In this way, the ignition gas supply unit 10 can supply the gas turbine with sufficient ignition gas at the appropriate pressure and temperature.

[0059] Of course, the gaseous fuel in buffer tank 14 may not be directly supplied as ignition gas. Please refer to [link / reference needed]. Figure 1 As can be seen, the ignition gas supply device 10 also includes a filter 15 connected to the buffer tank 14 via a transmission pipeline. The gas supply pipeline 154 is directly connected to the filter 15. Therefore, the gas supply pipeline 154 is connected to the buffer tank 14 via the filter 15. The filter 15 is used to filter and separate the gaseous fuel from the buffer tank 14.

[0060] The gaseous fuel in the buffer tank 14 may sometimes be impure, such as containing impurities and moisture. By passing the gaseous fuel in the buffer tank 14 to the filter 15 before supplying it to the gas turbine, impurities and moisture in the gaseous fuel can be removed, thereby improving the purity of the generated ignition gas.

[0061] To remove impurities and moisture from gaseous fuels, it is sometimes unnecessary to use a single, uniform filter.

[0062] Therefore, in some embodiments of this application, the ignition gas supply device may further include a filtration unit and a gas-liquid separation unit connected to the gas supply pipeline. The filtration unit is connected to a buffer tank and is used to filter the gaseous fuel from the buffer tank. The gas-liquid separation unit is connected to the filtration unit and is used to perform gas-liquid separation on the gaseous fuel from the filtration unit. In this manner, the filtration and gas-liquid separation of the gaseous fuel are handled by separate units. This approach also allows for the separate filtration and gas-liquid separation of the gaseous fuel from the buffer tank, thereby removing impurities and moisture from the gaseous fuel.

[0063] In some embodiments of this application, the ignition gas supply device includes multiple filters and multiple gas supply lines, each filter being connected to a buffer tank and each gas supply line being connected to a corresponding filter.

[0064] In the above embodiments, after the generated gaseous fuel is stored in the buffer tank, the gaseous fuel can enter multiple gas supply pipelines through multiple filters. Therefore, the above embodiments realize the simultaneous supply of ignition gas to multiple gas turbines by one ignition gas supply device.

[0065] Please continue reading Figure 1 The ignition gas supply device 10 also includes a filter 16 connected to the buffer tank 14 and a gas supply line 164 connected to the filter 16. The filter 16 is also used to filter and separate the gaseous fuel from the buffer tank 14. The gaseous fuel in the buffer tank 14 can also enter the gas supply line 164 through the filter 16 to supply gas to another gas turbine.

[0066] therefore, Figure 1 The embodiment shown illustrates a scheme in which one ignition gas supply device simultaneously supplies ignition gas to two gas turbines.

[0067] After the gaseous fuel flows through the gas supply line 154, there will be some pressure and temperature loss. Figure 1 It can also be seen that, in order to further ensure that the temperature and pressure of the ignition gas supplied to the gas turbine meet the requirements, the ignition gas supply device 10 also includes a second pressure transmitter 151, a second temperature transmitter 152 and a valve 153 arranged sequentially on the gas supply pipeline 154. Specifically, the second pressure transmitter 151 is located at the end of the gas supply line 154 furthest from the filter 15, and is used to detect the pressure of the gaseous fuel in the gas supply line 154; the second temperature transmitter 152 is located at the end of the gas supply line 154 furthest from the filter 15, and is used to detect the temperature of the gaseous fuel in the gas supply line 154; the valve 153 is also located on the gas supply line 154 and is located on the side of the second pressure transmitter 151 and the second temperature transmitter 152 furthest from the filter 15. That is to say, the second pressure transmitter 151, the second temperature transmitter 152 and the valve 153 are all located on the gas supply line 154, but the valve 153 is closest to the gas turbine side, and the valve 153 is used to control the opening of the gas supply line 154.

[0068] When the user observes that the pressure and temperature detected by the second pressure transmitter 151 and the second temperature transmitter 152 are both within the corresponding set range, the user can manually control the valve 153 on the gas supply line 154 to open, so that ignition gas with the required temperature and pressure can be delivered to the gas turbine.

[0069] Similarly, another gas supply line 164 is also equipped with a second pressure transmitter 161, a second temperature transmitter 162, and a valve 163, which have the same functions as the corresponding components on the gas supply line 154.

[0070] Of course, to improve control effectiveness and reduce labor costs, the control of the pressure and temperature of the gaseous fuel in the buffer tank 14 and the control of the valve 153 can also be carried out automatically.

[0071] Specifically, the ignition gas supply device 10 also includes a controller, which is not in Figure 1 As shown in the diagram, the controller can be any device or component with control functions, such as a PLC (Programmable Logic Controller), microcomputer, or single-chip microcomputer.

[0072] The controller is electrically connected to the first pressure transmitter 141 and the first temperature transmitter 142, respectively. Therefore, the controller can receive pressure signals fed back by the first pressure transmitter 141 and temperature signals fed back by the first temperature transmitter 142. The controller is also electrically connected to the booster pump 12 and the vaporizer 13, respectively. The controller controls the booster pump 12 based on the pressure signal fed back by the first pressure transmitter 141, and similarly, controls the vaporizer 13 based on the temperature signal fed back by the first temperature transmitter 142. The controller controls the temperature and pressure of the gaseous fuel in the buffer tank 14 by controlling the booster pump 12 and the vaporizer 13, ensuring that the temperature and pressure of the gaseous fuel in the buffer tank 14 are maintained at their respective set values. The controller controls the booster pump 12 and the vaporizer 13 by sending control signals to them.

[0073] Figure 2 For a block diagram illustrating the temperature control principle of the controller over the gaseous fuel in the buffer tank in an exemplary embodiment of this application, please refer to [link / reference]. Figure 2 The controller 17 may include a comparison mechanism 171 and a control device 172. The comparison mechanism 171 is used to compare the temperature signal sent by the first temperature transmitter 142 with the temperature setpoint. The control device 172 is used to control the vaporizer 13 to perform corresponding actions based on the temperature comparison result. Specifically, the control device 172 controls the temperature of the gaseous fuel in the buffer tank 14 by sending a control signal to the vaporizer 13 to control the electrical power of the vaporizer 13. Figure 2In the illustrated embodiment, the controller 17 can also be used to control the pressure of the gaseous fuel in the buffer tank 14. In this case, the comparison mechanism 171 is also used to compare the pressure signal sent by the first pressure transmitter 141 with the pressure setpoint, and the control device 172 is also used to control the booster pump 12 to perform corresponding actions based on the pressure comparison result. The control strategy employed by the control device 172 can be various, such as a PID (Proportional Integral Derivative) control strategy.

[0074] Therefore, by taking the pressure and temperature of the gaseous fuel in the buffer tank 14 as the controlled object, the first pressure transmitter 141 and the first temperature transmitter 142 as the detection elements, and the booster pump 12 and the vaporizer 13 as the actuators, these elements together with the controller 17 form a closed-loop negative feedback control system, which can keep the temperature and pressure of the gaseous fuel in the buffer tank 14 at the corresponding set values.

[0075] Specifically, the booster pump 12 may include a frequency converter. When the pressure comparison result is that the pressure is lower than the pressure set value, the control device 172 sends a control signal to increase the frequency of the frequency converter, thereby enabling the booster pump 12 to further increase the increased pressure, so that the pressure detected by the first air pressure transmitter 141 approaches the pressure set value from small to large. Conversely, when the pressure comparison result is that the pressure is higher than the pressure set value, the control device 172 sends a control signal to decrease the frequency of the frequency converter, thereby enabling the booster pump 12 to reduce the increased pressure, so that the pressure detected by the first air pressure transmitter 141 approaches the pressure set value from large to small.

[0076] Similarly, when the temperature comparison result is that the temperature is lower than the set temperature value, the control device 172 sends a control signal to increase the power of the vaporizer 13, thereby increasing the heating capacity of the vaporizer 13, and thus causing the temperature detected by the first temperature transmitter 142 to gradually approach the set temperature value; conversely, when the temperature comparison result is that the temperature is higher than the set temperature value, the control device 172 sends a control signal to reduce the power of the vaporizer 13, thereby reducing the heating capacity of the vaporizer 13, and thus causing the temperature detected by the first temperature transmitter 142 to gradually approach the set temperature value.

[0077] Because the pressure that the booster pump 12 can increase may be dynamically changed under the control of the controller 17, the pressure of the liquid gas fuel output by the booster pump 12 is also constantly changing. By feeding the liquid gas fuel into the buffer tank 14 after it flows through the booster pump 12 and the vaporizer 13 in sequence, the huge internal space of the buffer tank 14 can buffer and stabilize the gas fuel.

[0078] Similarly, the controller can also control valve 153.

[0079] In some embodiments of this application, the controller is electrically connected to a second pressure transmitter 151 and a second temperature transmitter 152, respectively. The controller receives pressure signals from the second pressure transmitter 151 and temperature signals from the second temperature transmitter 152. The controller is also electrically connected to a valve 153 to control the opening and closing of the valve 153. When the controller determines, based on the pressure signals from the second pressure transmitter 151 and the temperature signals from the second temperature transmitter 152, that the pressure and temperature of the gaseous fuel in the gas supply pipeline are both within the corresponding set ranges, it can control the valve 153 to open, thereby providing the gas turbine with ignition gas of acceptable pressure and temperature. It should be noted that the set range here can be a pressure range and a temperature range, or it can be a set pressure and temperature value. Furthermore, the pressure and temperature values ​​set for the gas supply pipeline are not directly related to the pressure and temperature set values ​​controlled by the controller for the gaseous fuel in the buffer tank.

[0080] To facilitate the control of the flow of gaseous or liquid gaseous fuel within the ignition gas supply device 10, one or more valves may be installed on the transmission pipelines and gas supply pipelines connecting the various components within the ignition gas supply device 10. The type and position of each valve may be arbitrarily set to meet specific control requirements.

[0081] When the ignition gas supply device 10 adopts, as shown in the example Figure 1 When the scheme shown supplies ignition gas to two gas turbines at the same time, the controller can also control valve 163. The specific control scheme used can be the same as the control scheme used to control valve 153.

[0082] It should be understood that although the same controller is used to control the pressure and temperature of the gaseous fuel in the buffer tank and the valves on the gas supply pipeline in the foregoing embodiments, in practical applications, different controllers can be used for different controlled objects to improve the fault tolerance of the entire system.

[0083] To reduce heat loss, the ignition gas supply device 10 also includes a heat tracing line, which is laid on at least a portion of the ignition gas supply device 10 for heat preservation of at least a portion of the ignition gas supply device 10.

[0084] Specifically, heat tracing lines can be laid on all pipelines between the gas outlet of the vaporizer 13 and the gas supply pipeline 154, and heat tracing lines can also be laid on components within the ignition gas supply device 10, such as the storage tank 11, buffer tank 14, and filter 15. The heat tracing lines can be heated by steam, electric heating cable, or electric heating pipe.

[0085] The ignition gas supply device provided in the above embodiments can be integrated on the base plate, into a skid-mounted device.

[0086] By integrating the ignition gas supply device into a skid-mounted unit, installation and transportation are facilitated. Once the gas turbine in one location has reached operating temperature, it can be transported to another location for ignition, enabling multiple gas turbines in different locations to share the same ignition device.

[0087] According to another aspect of this application, this application also provides a method for supplying ignition gas to a gas turbine.

[0088] Figure 3 For a flowchart illustrating the ignition and start-up method of a gas turbine in an exemplary embodiment of this application, please refer to [link / reference]. Figure 3 The method includes:

[0089] Step 110: Store liquid gas fuel.

[0090] As mentioned earlier, the liquid gaseous fuel can be LNG or LPG, and can be stored in storage tanks.

[0091] Step 120: Pressurize the liquid gaseous fuel.

[0092] The liquid gas fuel stored in the aforementioned steps can be fed into a booster pump to pressurize the liquid gas fuel.

[0093] Step 130: The pressurized liquid gaseous fuel is heated and vaporized to obtain gaseous fuel.

[0094] After being pressurized by a booster pump, the liquid gas fuel can be fed into a vaporizer for heating and vaporization.

[0095] Step 140: Buffer the gaseous fuel so that the pressure and temperature of the buffered gaseous fuel are maintained at the corresponding set values.

[0096] The gaseous fuel obtained after pressurization, heating and gasification of liquid gaseous fuel can be fed into a buffer tank for buffering.

[0097] In some embodiments of this application, the step of buffering the gaseous fuel to maintain the pressure and temperature of the buffered gaseous fuel at corresponding set values ​​includes:

[0098] The temperature and pressure of the buffered gaseous fuel are monitored;

[0099] Based on the detected temperature and pressure, the liquid gaseous fuel is pressurized, heated, and vaporized to maintain the pressure and temperature of the buffered gaseous fuel at the corresponding set values.

[0100] The buffer tank is equipped with a first pressure transmitter and a first temperature transmitter to detect the temperature and pressure of the buffered gaseous fuel. Based on this temperature and pressure, the frequency of the booster pump and the power of the vaporizer can be controlled automatically or manually by the user, thereby maintaining the pressure and temperature of the buffered gaseous fuel at the corresponding set values.

[0101] Step 150: The buffered gaseous fuel is supplied to the gas turbine as an ignition gas.

[0102] A gas supply pipeline can be installed to connect to the buffer tank, and the gaseous fuel in the buffer tank can be supplied to the gas turbine through the gas supply pipeline.

[0103] In some embodiments of this application, the method further includes, before supplying the buffered gaseous fuel to the gas turbine as an ignition gas:

[0104] The buffered gaseous fuel is subjected to filtration and gas-liquid separation processes.

[0105] It can be filtered and gas-liquid separated by a filter to remove impurities and moisture.

[0106] In some embodiments of this application, the method further includes:

[0107] When the pressure and temperature of the gaseous fuel in the gas supply pipeline near the gas turbine are both within the corresponding set range, the gaseous fuel is supplied to the gas turbine.

[0108] A second pressure transmitter, a second temperature transmitter, and a valve can be installed on the gas supply pipeline near the gas turbine. The valve is closest to the gas turbine. The second pressure transmitter is used to detect the pressure of the gaseous fuel in the gas supply pipeline, and the second temperature transmitter is used to detect the temperature of the gaseous fuel in the gas supply pipeline. A controller can be installed that is electrically connected to the second pressure transmitter, the second temperature transmitter, and the valve. When the pressure detected by the second pressure transmitter and the temperature detected by the second temperature transmitter are both within their respective set ranges, the controller controls the valve on the gas supply pipeline to open and supply gaseous fuel to the gas turbine.

[0109] According to a third aspect of this application, this application also provides a gas turbine system.

[0110] A gas turbine system, comprising:

[0111] Gas turbines; and

[0112] The ignition gas supply device described above is connected to the ignition gas inlet of the gas turbine.

[0113] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from its spirit or substance, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An ignition gas supply device for supplying ignition gas to a gas turbine, characterized in that, The ignition gas supply device is integrated into a skid-mounted device, and the ignition gas supply device includes: Storage tanks are used to store liquid gaseous fuels; A booster pump, connected to the storage tank, is used to pressurize the liquid gaseous fuel from the storage tank; A vaporizer, connected to the booster pump, is used to heat and vaporize the liquid gaseous fuel from the booster pump. A buffer tank, connected to the vaporizer, is used to store gaseous fuel from the vaporizer; A first pressure transmitter is installed on the buffer tank and is used to detect the pressure of the gaseous fuel in the buffer tank; A first temperature transmitter is installed on the buffer tank and is used to detect the temperature of the gaseous fuel inside the buffer tank; A gas supply pipeline, one end of which is connected to the buffer tank and the other end of which is connected to the gas turbine, supplies gaseous fuel in the buffer tank as ignition gas to meet the ignition and start-up requirements of the gas turbine. A filter is connected to the buffer tank, and the gas supply pipeline is connected to the buffer tank via the filter. The filter is used to perform filtration and gas-liquid separation treatment on the gaseous fuel from the buffer tank. The second pressure transmitter is located at the end of the gas supply pipeline furthest from the filter and is used to detect the pressure of the gaseous fuel in the gas supply pipeline. A second temperature transmitter, located at the end of the gas supply pipeline furthest from the filter, is used to detect the temperature of the gaseous fuel within the gas supply pipeline; and A valve is installed on the gas supply pipeline and on the side of the second pressure transmitter and the second temperature transmitter away from the filter, for controlling the flow of the gas supply pipeline; The controller is electrically connected to the second pressure transmitter and the second temperature transmitter, respectively. The controller is used to receive the pressure signal fed back by the second pressure transmitter and the temperature signal fed back by the second temperature transmitter. The controller is also electrically connected to the valve and is used to control the opening and closing of the valve.

2. The ignition gas supply device according to claim 1, characterized in that, The ignition gas supply device includes multiple filters and multiple gas supply lines. Each filter is connected to the buffer tank, and each gas supply line is connected to the corresponding filter.

3. The ignition gas supply device according to claim 1, characterized in that, It also includes a controller, which is electrically connected to the first pressure transmitter and the first temperature transmitter respectively. The controller is used to receive the pressure signal fed back by the first pressure transmitter and the temperature signal fed back by the first temperature transmitter. The controller is electrically connected to the booster pump and the vaporizer respectively, and controls the temperature and pressure of the gaseous fuel in the buffer tank through the booster pump and the vaporizer.

4. The ignition gas supply device according to claim 1, characterized in that, The ignition gas supply device further includes: A heat tracing line is laid on at least a portion of the ignition gas supply device for heat preservation of at least a portion of the ignition gas supply device.

5. The ignition gas supply device according to any one of claims 1-4, characterized in that, The vaporizer is an electrically heated oil bath vaporizer.

6. A method for supplying ignition gas to a gas turbine, characterized in that, The method is performed by an ignition gas supply device integrated into a skid-mounted unit, the method comprising: Storing liquid gaseous fuels; The liquid gaseous fuel is pressurized; The pressurized liquid gaseous fuel is heated and vaporized to obtain gaseous fuel. The gaseous fuel is buffered so that the pressure and temperature of the buffered gaseous fuel are maintained at corresponding set values; The buffered gaseous fuel is subjected to filtration and gas-liquid separation processes. The gaseous fuel, after being filtered and separated into gas and liquid, is supplied to the gas turbine as ignition gas. When the pressure and temperature of the gaseous fuel in the gas supply pipeline near the gas turbine are within the corresponding set range, the gaseous fuel is supplied to the gas turbine to meet the ignition and start-up requirements of the gas turbine.

7. The method according to claim 6, characterized in that, The step of buffering the gaseous fuel to maintain the pressure and temperature of the buffered gaseous fuel at corresponding set values ​​includes: The temperature and pressure of the buffered gaseous fuel are monitored; Based on the detected temperature and pressure, the liquid gaseous fuel is pressurized, heated, and vaporized to maintain the pressure and temperature of the buffered gaseous fuel at the corresponding set values.

8. A gas turbine system, characterized in that, include: gas turbine; and The ignition gas supply device according to any one of claims 1-5, wherein the ignition gas supply device is connected to the ignition gas inlet of the gas turbine.

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