阅读说明：本技术 点火气体供应装置、点火气体供应方法及燃气轮机系统 (Ignition gas supply device, ignition gas supply method, and gas turbine system ) 是由 王金成 刘斌 陈志强 于 2021-01-27 设计创作，主要内容包括：本申请提供了一种点火气体供应装置、燃气轮机的点火气体供应方法及燃气轮机系统。该点火气体供应装置用于为燃气轮机供应点火气体,包括：储存罐,用于存储液态气体燃料；增压泵,与储存罐连通,用于对液态气体燃料进行加压处理；汽化器,与增压泵连通,用于对液态气体燃料进行加热和气化处理；缓存罐,与汽化器连通,用于存储气体燃料；气压变送器,设置于缓存罐上,用于检测压力；温度变送器,设置于缓存罐上,用于检测温度；供气管路,其一端与缓存罐相连通,另一端用于与燃气轮机相连通,供气管路将缓存罐内气体燃料作为点火气体进行输送。本申请的方案可为燃气轮机提供温度、压力及产气量方面均满足需求的点火气体。(The application provides an ignition gas supply device, an ignition gas supply method of a gas turbine, and a gas turbine system. The ignition gas supply apparatus for supplying ignition gas to a gas turbine includes: a storage tank for storing liquid gaseous fuel; the booster pump is communicated with the storage tank and is used for pressurizing the liquid gas fuel; the vaporizer is communicated with the booster pump and is used for heating and gasifying the liquid gas fuel; the buffer tank is communicated with the vaporizer and is used for storing the gas fuel; the air pressure transmitter is arranged on the cache tank and used for detecting pressure; the temperature transmitter is arranged on the cache tank and used for detecting temperature; and one end of the gas supply pipeline is communicated with the cache tank, the other end of the gas supply pipeline is communicated with the gas turbine, and gas fuel in the cache tank is used as ignition gas to be conveyed by the gas supply pipeline. The scheme of this application can provide the ignition gas that all satisfies the demand in the aspect of temperature, pressure and the gas production for gas turbine.)

1. An ignition gas supply apparatus for supplying an ignition gas to a gas turbine, comprising:

a storage tank for storing liquid gaseous fuel;

the booster pump is communicated with the storage tank and is used for pressurizing the liquid gas fuel from the storage tank;

the vaporizer is communicated with the booster pump and is used for heating and gasifying the liquid gas fuel from the booster pump;

a buffer tank in communication with the vaporizer for storing gaseous fuel from the vaporizer;

the first air pressure transmitter is arranged on the buffer tank and used for detecting the pressure of the gas fuel in the buffer tank;

the first temperature transmitter is arranged on the cache tank and used for detecting the temperature of the gas fuel in the cache tank;

and one end of the gas supply pipeline is communicated with the cache tank, the other end of the gas supply pipeline is communicated with the gas turbine, and gas fuel in the cache tank is used as ignition gas to be conveyed through the gas supply pipeline.

2. The ignition gas supply apparatus according to claim 1, characterized in that the ignition gas supply apparatus further comprises:

the filter is communicated with the cache tank, the gas supply pipeline is communicated with the cache tank through the filter, and the filter is used for respectively carrying out filtering treatment and gas-liquid separation treatment on the gas fuel from the cache tank.

3. The ignition gas supply apparatus according to claim 2, wherein the ignition gas supply apparatus comprises a plurality of the filters and a plurality of the gas supply lines, each of the filters being respectively communicated with the buffer tank, each of the gas supply lines being respectively communicated with a corresponding one of the filters.

4. The ignition gas supply apparatus according to claim 2, characterized in that the ignition gas supply apparatus further comprises:

the second air pressure transmitter is arranged at one end, far away from the filter, of the air supply pipeline and is used for detecting the pressure of the gas fuel in the air supply pipeline;

the second temperature transmitter is arranged at one end, far away from the filter, of the air supply pipeline and is used for detecting the temperature of the gas fuel in the air supply pipeline; and

the valve, set up in on the air supply line and set up and be in second pneumatic transducer with keeping away from of second temperature transmitter one side of filter is used for control conduction of air supply line.

5. The ignition gas supply apparatus according to claim 4, further comprising a controller electrically connected to the first pneumatic transmitter and the first temperature transmitter, respectively, the controller being configured to receive a pressure signal fed back by the first pneumatic transmitter and a temperature signal fed back by the first temperature transmitter;

the controller is respectively electrically connected with the booster pump and the vaporizer, and controls the temperature and the pressure of the gas fuel in the buffer tank through the booster pump and the vaporizer.

6. The ignition gas supply apparatus according to claim 5, wherein the controller is electrically connected to the second gas pressure transmitter and the second temperature transmitter, respectively, the controller being configured to receive a pressure signal fed back by the second gas pressure transmitter and a temperature signal fed back by the second temperature transmitter; the controller is also electrically connected with the valve and used for controlling the opening and closing of the valve.

7. The ignition gas supply apparatus according to claim 1, characterized in that the ignition gas supply apparatus further comprises:

and the heat tracing circuit is laid on at least one part of the ignition gas supply device and is used for carrying out heat preservation treatment on at least one part of the ignition gas supply device.

8. Ignition gas supply arrangement according to claim 1, characterized in that the ignition gas supply arrangement is integrated in one skid.

9. An ignition gas supply apparatus according to any one of claims 1 to 8, wherein the vaporizer is an electrically heated oil bath vaporizer.

10. A method of supplying an ignition gas of a gas turbine, the method comprising:

storing the liquid gaseous fuel;

pressurizing the liquid gas fuel;

heating and gasifying the liquid gas fuel after pressurization treatment to obtain gas fuel;

caching the gas fuel, and keeping the pressure and the temperature of the cached gas fuel at corresponding set values;

supplying the buffered gaseous fuel as ignition gas to a gas turbine.

11. The method of claim 10, wherein said step of buffering said gaseous fuel to maintain a pressure and temperature of said buffered gaseous fuel at corresponding set points comprises:

detecting the temperature and the pressure of the buffered gaseous fuel;

and controlling the pressurization, heating and gasification treatment of the liquid gas fuel according to the detected temperature and pressure so as to keep the pressure and temperature of the buffered gas fuel at corresponding set values.

12. The method of claim 10, further comprising:

and when the pressure and the temperature of the gas fuel in the gas supply pipeline close to one side of the gas turbine are both in corresponding set ranges, controlling the gas fuel to be supplied to the gas turbine.

13. A gas turbine system, comprising:

a gas turbine; and

the ignition gas supply apparatus of any one of claims 1 to 9, which communicates with an ignition gas inlet of the gas turbine.

Technical Field

The present invention relates to the field of gas turbine technology, and more particularly, to an ignition gas supply device, an ignition gas supply method for a gas turbine, and a gas turbine system.

Background

In countries and regions where the power system is not available, the installation mode of using a gas turbine to drive a generator for power generation, grid connection and peak shaving is the simplest solution.

When the gas turbine fails to ignite the main fuel using a spark, additional ignition gas is required to ignite the main fuel to achieve the self-sustaining minimum stable speed of the gas turbine.

At present, the conventional ignition gas supply mode is to supply gas to a gas turbine by using a natural gasification mode, however, for the gas turbine, especially for a large-scale gas turbine, if the mode is adopted, the generated gas cannot meet the air inlet requirement of the gas turbine in terms of temperature and pressure, and the unit time gas consumption required by the gas turbine cannot be provided.

Disclosure of Invention

The application aims to provide an ignition gas supply device, an ignition gas supply method of a gas turbine and a gas turbine system, and solves the problem that the conventional gas supply mode cannot meet the ignition starting requirement of the gas turbine in the aspects of temperature, pressure and gas yield of generated gas.

In order to solve the technical problem, the following technical scheme is adopted in the application:

the present application first provides an ignition gas supply apparatus for supplying an ignition gas to a gas turbine, comprising:

a storage tank for storing liquid gaseous fuel;

the booster pump is communicated with the storage tank and is used for pressurizing the liquid gas fuel from the storage tank;

the vaporizer is communicated with the booster pump and is used for heating and gasifying the liquid gas fuel from the booster pump;

a buffer tank in communication with the vaporizer for storing gaseous fuel from the vaporizer;

the first air pressure transmitter is arranged on the buffer tank and used for detecting the pressure of the gas fuel in the buffer tank;

the first temperature transmitter is arranged on the cache tank and used for detecting the temperature of the gas fuel in the cache tank;

and one end of the gas supply pipeline is communicated with the cache tank, the other end of the gas supply pipeline is communicated with the gas turbine, and gas fuel in the cache tank is used as ignition gas to be conveyed through the gas supply pipeline.

According to an embodiment of the present application, the ignition gas supply apparatus further comprises:

the filter is communicated with the cache tank, the gas supply pipeline is communicated with the cache tank through the filter, and the filter is used for respectively carrying out filtering treatment and gas-liquid separation treatment on the gas fuel from the cache tank.

According to an embodiment of the present application, the ignition gas supply device includes a plurality of the filters and a plurality of the gas supply lines, each of the filters is respectively communicated with the buffer tank, and each of the gas supply lines is respectively communicated with the corresponding filter.

According to an embodiment of the present application, the ignition gas supply apparatus further comprises:

the second air pressure transmitter is arranged at one end, far away from the filter, of the air supply pipeline and is used for detecting the pressure of the gas fuel in the air supply pipeline;

the second temperature transmitter is arranged at one end, far away from the filter, of the air supply pipeline and is used for detecting the temperature of the gas fuel in the air supply pipeline; and

the valve, set up in on the air supply line and set up and be in second pneumatic transducer with keeping away from of second temperature transmitter one side of filter is used for control conduction of air supply line.

According to an embodiment of the present application, the ignition gas supply device further comprises a controller, the controller is electrically connected with the first pneumatic transmitter and the first temperature transmitter respectively, and the controller is used for receiving a pressure signal fed back by the first pneumatic transmitter and a temperature signal fed back by the first temperature transmitter;

the controller is respectively electrically connected with the booster pump and the vaporizer, and controls the temperature and the pressure of the gas fuel in the buffer tank through the booster pump and the vaporizer.

According to an embodiment of the present application, the controller is electrically connected to the second pneumatic transmitter and the second temperature transmitter, respectively, and the controller is configured to receive a pressure signal fed back by the second pneumatic transmitter and a temperature signal fed back by the second temperature transmitter; the controller is also electrically connected with the valve and used for controlling the opening and closing of the valve.

According to an embodiment of the present application, the ignition gas supply apparatus further comprises:

and the heat tracing circuit is laid on at least one part of the ignition gas supply device and is used for carrying out heat preservation treatment on at least one part of the ignition gas supply device.

According to one embodiment of the application, the ignition gas supply is integrated in a skid.

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

The present application also provides an ignition gas supply method of a gas turbine, the method including:

storing the liquid gaseous fuel;

pressurizing the liquid gas fuel;

heating and gasifying the liquid gas fuel after pressurization treatment to obtain gas fuel;

caching the gas fuel, and keeping the pressure and the temperature of the cached gas fuel at corresponding set values;

supplying the buffered gaseous fuel as ignition gas to a gas turbine.

According to an embodiment of the present application, said step of buffering said gaseous fuel to maintain the pressure and temperature of said buffered gaseous fuel at corresponding set values comprises:

detecting the temperature and the pressure of the buffered gaseous fuel;

and controlling the pressurization, heating and gasification treatment of the liquid gas fuel according to the detected temperature and pressure so as to keep the pressure and temperature of the buffered gas fuel at corresponding set values.

According to an embodiment of the present application, further comprising:

and when the pressure and the temperature of the gas fuel in the gas supply pipeline close to one side of the gas turbine are both in corresponding set ranges, controlling the gas fuel to be supplied to the gas turbine.

The present application further provides a gas turbine system comprising:

a gas turbine; and

the ignition gas supply apparatus as described above, the ignition gas supply apparatus communicating with an ignition gas inlet of the gas turbine.

According to the technical scheme, the method has at least the following advantages and positive effects:

with the ignition gas supply apparatus, the ignition gas supply method for a gas turbine, and the gas turbine system according to the present application, after the liquid gas fuel from the storage tank is subjected to the pressurization process by the booster pump and the heating and gasification process by the vaporizer, the generated gas fuel enters the buffer tank to be stored, and the gas fuel in the buffer tank can be supplied to the gas turbine through the gas supply line communicated with the buffer tank. Compared with the gas production mode of natural gasification, the pressure and the temperature of the generated gas fuel are improved. In addition, the first air pressure transmitter and the first temperature transmitter arranged on the cache tank can be respectively used for detecting the pressure and the temperature of the gas fuel in the cache tank, so that the pressure and the temperature of the gas fuel in the cache tank can be controlled to reach corresponding set values by controlling the booster pump and the vaporizer, and ignition gas meeting ignition starting requirements in the aspects of temperature, pressure, gas yield and the like can be provided for the gas turbine.

Drawings

FIG. 1 is a schematic view of an ignition gas supply apparatus in an exemplary embodiment of the present application;

FIG. 2 is a schematic block diagram illustrating a controller controlling the temperature of the gaseous fuel in the buffer tank according to an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic flow chart illustrating a method for starting a gas turbine engine using ignition according to an exemplary embodiment of the present application.

The reference numerals are explained below:

10-ignition gas supply means; 11-a storage tank; 12-a booster pump; 13-a vaporizer; 14-a cache tank; 141-a first pneumatic transmitter; 142-a first temperature transmitter; 15. 16-a filter; 151. 161-a second pneumatic transducer; 152. 162-a second temperature transmitter; 153. 163-a valve; 154. 164-gas supply line; 17-a controller; 171-a comparison mechanism; 172-control means.

Detailed Description

Exemplary embodiments that embody features and advantages of the present application will be described in detail in the following description. It is to be understood that the present application is capable of various modifications in various embodiments without departing from the scope of the application, and that the description and drawings are to be taken as illustrative and not restrictive in character.

According to an aspect of the present application, there is first provided an ignition gas supply apparatus for supplying an ignition gas to a gas turbine.

Fig. 1 is a schematic view showing the structure of an ignition Gas supply apparatus according to an exemplary embodiment of the present application, and referring to fig. 1, the ignition Gas supply apparatus 10 includes a storage tank 11, and the storage tank 11 is used for storing a liquid Gas fuel, where the liquid Gas fuel may be Liquefied Petroleum Gas (LPG) or Liquefied Natural Gas (LNG). When the liquid gas fuel is liquefied petroleum gas, the gas supply apparatus 10 may supply the ignition gas to the gas turbine as petroleum gas; similarly, when the liquid gas fuel is lng, the ignition gas that the gas supply device 10 can supply to the gas turbine is natural gas. The liquid gas fuel stored in the storage tank can be supplied and replenished by the tank car.

With continued reference to fig. 1, the ignition gas supply apparatus 10 further includes a booster pump 12, a vaporizer 13, and a buffer tank 14. The booster pump 12 is connected to the storage tank 11 through a transfer line, the storage tank 11 for storing the liquid gas fuel has a certain pressure, and after the liquid gas fuel in the storage tank 11 is input to the booster pump 12 through the transfer line, the booster pump 12 pressurizes the liquid gas fuel from the storage tank 11.

The vaporizer 13 is connected to the booster pump 12 via a transfer line, and the liquid gas fuel from the booster pump 12 is heated and vaporized by the vaporizer 13 after entering the vaporizer 13 via the transfer line. The vaporizer 13 may be an electrically heated oil bath vaporizer, and can forcibly vaporize and heat the liquid gas fuel.

The buffer tank 14 is communicated with the vaporizer 13 through a transfer line, the liquid gas fuel is changed into gaseous gas fuel after passing through the vaporizer 13, and the buffer tank 14 is used for storing the gaseous fuel from the vaporizer 13.

Referring to fig. 1, the ignition gas supply apparatus 10 further includes a first gas pressure transmitter 141 and a first temperature transmitter 142, wherein the first gas pressure transmitter 141 and the first temperature transmitter 142 are both disposed on the buffer tank 14, the first gas pressure transmitter 141 is used for detecting the pressure of the gas fuel in the buffer tank 14, and the first temperature transmitter 142 is used for detecting the temperature of the gas fuel in the buffer tank 14.

In this manner, the user can observe the pressure and temperature detected by the first gas pressure transmitter 141 and the first temperature transmitter 142, and when the frequency of the booster pump 12 and the electric power of the vaporizer 13 can be controlled by setting the corresponding switches, the user can maintain the pressure and temperature of the gaseous fuel in the buffer tank 14 at the corresponding set values by manually adjusting the frequency of the booster pump 12 and the electric power of the vaporizer 13.

In fig. 1, the ignition gas supply apparatus 10 further includes a gas supply line 154, one end of the gas supply line 154 is communicated with the buffer tank 14, and the other end is used for being communicated with the gas turbine, so that the gas supply line 154 can deliver the gas fuel in the buffer tank 14 as the ignition gas. In this way, the ignition gas supply apparatus 10 can supply the gas turbine with an adequate amount of ignition gas at an appropriate pressure and temperature.

Of course, instead of directly supplying the gas fuel in the buffer tank 14 as the ignition gas, referring to fig. 1, it can be seen that the ignition gas supply apparatus 10 further includes a filter 15 communicating with the buffer tank 14 through a transfer line, and the gas supply line 154 is directly communicated with the filter 15, so that the gas supply line 154 communicates with the buffer tank 14 through the filter 15, and the filter 15 is used for performing the filtering process and the gas-liquid separation process on the gas fuel from the buffer tank 14, respectively.

The gaseous fuel in the buffer tank 14 may sometimes be insufficiently pure, such as to contain impurities and moisture. By feeding the gas fuel in the buffer tank 14 to the filter 15 before supplying the gas fuel to the gas turbine, impurities and moisture in the gas fuel can be removed, and the purity of the ignition gas to be generated can be improved.

In order to remove impurities and moisture from the gaseous fuel, it is sometimes not necessary to use a uniform filter.

Therefore, in some embodiments of the present application, the ignition gas supply apparatus may further include a filtering unit and a gas-liquid separation unit in communication with the gas supply line, wherein the filtering unit is in communication with the buffer tank, and the filtering unit is configured to filter the gas fuel from the buffer tank; the gas-liquid separation unit is communicated with the filtering unit and is used for carrying out gas-liquid separation treatment on the gas fuel from the filtering unit. In this manner, the gas fuel is filtered and separated into gas and liquid in one unit, and the impurities and moisture in the gas fuel can be removed by filtering and separating the gas fuel from the buffer tank.

In some embodiments of the present application, the ignition gas supply device includes a plurality of filters and a plurality of gas supply lines, each filter is respectively communicated with the buffer tank, and each gas supply line is respectively communicated with a corresponding filter.

In the above embodiment, after the generated gas fuel is stored in the buffer tank, the gas fuel can be introduced into the plurality of gas supply lines through the plurality of filters, respectively, and therefore, the above embodiment realizes that the ignition gas is supplied to the plurality of gas turbines simultaneously by one ignition gas supply device.

With continued reference to fig. 1, the ignition gas supply apparatus 10 further includes a filter 16 communicated with the buffer tank 14 and a gas supply pipeline 164 communicated with the filter 16, the filter 16 is also used for filtering and separating gas fuel from the buffer tank 14, respectively, and the gas fuel in the buffer tank 14 can enter the gas supply pipeline 164 through the filter 16, and can supply gas for another gas turbine.

Thus, the embodiment shown in FIG. 1 illustrates the simultaneous supply of ignition gas to two gas turbines from one ignition gas supply.

There is some loss of pressure and temperature of the gaseous fuel after it flows through the gas supply line 154. As can also be seen from fig. 1, in order to further ensure that the temperature and pressure of the ignition gas delivered to the gas turbine are satisfactory, the ignition gas supply device 10 further comprises a second gas pressure transmitter 151, a second temperature transmitter 152 and a valve 153 arranged in sequence on the gas supply line 154. Specifically, the second air pressure transmitter 151 is disposed at an end of the air supply line 154 away from the filter 15, and is configured to detect the pressure of the gaseous fuel in the air supply line 154; a second temperature transmitter 152 is disposed at an end of the air supply line 154 away from the filter 15, and is used for detecting the temperature of the gas fuel in the air supply line 154; a valve 153 is also provided on the air supply line 154 and on the side of the second pressure transmitter 151 and the second temperature transmitter 152 remote from the filter 15, that is to say the second pressure transmitter 151, the second temperature transmitter 152 and the valve 153 are all provided on the air supply line 154, but the valve 153 is closest to the gas turbine side, and the valve 153 is used to control the conductance of the air supply line 154.

When the user observes that the pressure and the temperature detected by the second gas pressure transmitter 151 and the second temperature transmitter 152 are both within the corresponding setting ranges, the valve 153 on the gas supply line 154 can be manually controlled to open, so that the ignition gas with the temperature and the pressure meeting the requirements can be supplied to the gas turbine.

Similarly, another air supply line 164 is also provided with a second pressure transducer 161, a second temperature transducer 162 and a valve 163, which are identical to the functions that can be performed by the corresponding components on the air supply line 154.

Of course, the control of the pressure and temperature of the gaseous fuel in the buffer tank 14 and the control of the valve 153 may be automated to improve control and reduce labor costs.

Specifically, the ignition gas supply apparatus 10 further includes a controller, which is not shown in fig. 1. The Controller may be a PLC (Programmable Logic Controller), a microcomputer, a single chip microcomputer, or other devices or devices having a control function.

The controller is electrically connected to the first pneumatic transmitter 141 and the first temperature transmitter 142, respectively, and thus, the controller can be used to receive the pressure signal fed back by the first pneumatic transmitter 141 and the temperature signal fed back by the first temperature transmitter 142. The controller is also electrically connected to the booster pump 12 and the vaporizer 13, respectively, and controls the booster pump 12 based on the pressure signal fed back from the first pressure transmitter 141, and similarly, controls the vaporizer 13 based on the temperature signal fed back from the first temperature transmitter 142. The controller controls the temperature and pressure of the gas fuel in the buffer tank 14 by controlling the booster pump 12 and the vaporizer 13 so that the temperature and pressure of the gas fuel in the buffer tank 14 are maintained at corresponding set values. The controller controls the booster pump 12 and the vaporizer 13 by sending control signals to the booster pump 12 and the vaporizer 13.

Fig. 2 is a schematic block diagram illustrating the temperature control of the gaseous fuel in the buffer tank by the controller according to an exemplary embodiment of the present invention, referring to fig. 2, the controller 17 may include a comparing mechanism 171 and a control device 172, the comparing mechanism 171 is configured to compare the temperature signal sent by the first temperature transmitter 142 with a temperature set value, and the control device 172 is configured to control the vaporizer 13 to perform a corresponding action according to the temperature comparison result. Specifically, the controller 172 sends a control signal to the vaporizer 13 to control the electric power of the vaporizer 13, thereby controlling the temperature of the gaseous fuel in the buffer tank 14. The controller 17 in the embodiment shown in fig. 2 can also be used to control the pressure of the gas fuel in the buffer tank 14, in which case, the comparing mechanism 171 is also used to compare the pressure signal sent by the first gas pressure transducer 141 with the pressure set value, and the control device 172 is also used to control the booster pump 12 to perform corresponding actions according to the pressure comparison result. The control strategy employed by the control device 172 may be various, and for example, the control strategy may be based on PID (Proportional Integral Derivative).

As can be seen, if the pressure and temperature of the gas fuel in the buffer tank 14 are controlled, the first gas pressure transmitter 141 and the first temperature transmitter 142 are detection elements, and the booster pump 12 and the vaporizer 13 are actuators, these elements and the controller 17 form a closed-loop negative feedback control system, and the temperature and pressure of the gas fuel in the buffer tank 14 can be maintained at corresponding set values.

Specifically, the booster pump 12 may include an inverter, and when the pressure comparison result indicates that the pressure is lower than the pressure set value, the control device 172 sends a control signal to increase the frequency of the inverter, so that the booster pump 12 can further increase the increased pressure to make the pressure detected by the first pressure transducer 141 approach the pressure set value from small to large; on the contrary, 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, so that the booster pump 12 can decrease the increased pressure, and the pressure detected by the first pressure transmitter 141 approaches the pressure set value from large to small.

Similarly, when the temperature comparison result indicates that the temperature is lower than the temperature set value, the control device 172 sends a control signal to increase the electric power of the vaporizer 13, increase the heating capacity of the vaporizer 13, and further make the temperature detected by the first temperature transmitter 142 approach the temperature set value from small to large; on the contrary, when the temperature comparison result is that the temperature is higher than the temperature set value, the control device 172 sends a control signal to decrease the electric power of the vaporizer 13, so as to decrease the heating capacity of the vaporizer 13, and further to make the temperature detected by the first temperature transmitter 142 approach the temperature set value from small to large.

Since the pressure that can be increased by the booster pump 12 may be dynamically changed under the control of the controller 17, and the pressure of the liquid gas fuel output from the booster pump 12 is also constantly changed, the large internal space of the buffer tank 14 may serve as a buffer and a pressure-stabilizing function for the gas fuel by feeding the liquid gas fuel into the buffer tank 14 after passing through the booster pump 12 and the vaporizer 13 in sequence.

Similarly, the controller may also control the valve 153.

In some embodiments of the present application, a controller is electrically connected to the second air pressure transmitter 151 and the second temperature transmitter 152, respectively, and the controller is configured to receive a pressure signal fed back by the second air pressure transmitter 151 and a temperature signal fed back by the second temperature transmitter 152; the controller is further electrically connected to the valve 153 and configured to control the opening and closing of the valve 153, and when the controller determines that the pressure and the temperature of the gas fuel in the gas supply line are both within the corresponding set ranges according to the pressure signal fed back by the second pressure transmitter 151 and the temperature signal fed back by the second temperature transmitter 152, the controller may control the valve 153 to open, so as to provide the ignition gas with qualified pressure and temperature for the gas turbine. It should be noted that the set range here may be a pressure value interval and a temperature value interval, or may be a set pressure value and a set temperature value, and the pressure value and the temperature value set for the air supply line here have no direct relation with the pressure set value and the temperature set value for the controller to control the gas fuel in the buffer tank.

To facilitate control of the flow of the gaseous or liquid gaseous fuel within the ignition gas supply 10, one or more valves may be provided in the delivery and supply lines connecting the various components within the ignition gas supply 10, each valve being of a type and position that can be set arbitrarily to meet specific control requirements.

When the ignition gas supply apparatus 10 supplies ignition gas to two gas turbines simultaneously using the scheme shown in fig. 1, the controller may also control the valve 163, and the control scheme may be the same as the control scheme used to control the valve 153.

It should be understood that although the same controller is used for controlling the pressure and temperature of the gas fuel in the buffer tank and for controlling the valve on the gas supply pipeline in the foregoing embodiments, in practical applications, different controllers may be used for different control objects to improve the fault tolerance of the whole system.

In order to reduce heat loss, the ignition gas supply apparatus 10 further includes: and a heat tracing circuit laid on at least a part of the ignition gas supply means 10 for performing a heat-insulating treatment on at least a part of the ignition gas supply means 10.

Specifically, heat tracing lines may be laid on all the lines from the outlet of the vaporizer 13 to the outlet of the air supply line 154, and heat tracing lines may be laid on components in the ignition gas supply apparatus 10 such as the storage tank 11, the buffer tank 14, and the filter 15. The heat tracing circuit can carry out heat tracing in modes of steam heat tracing, electric heat tracing cable heat tracing, electric heat tracing pipes and the like.

The ignition gas supply provided by the above embodiments can be integrated on the base plate, on a skid.

The ignition gas supply device is integrated on a skid-mounted device, so that the installation and the carrying are convenient, the whole gas turbine positioned at one place can be carried to another place for ignition after the gas turbine operates at the temperature, and the ignition of the gas turbines positioned at multiple places can be realized by sharing the ignition gas supply device.

According to another aspect of the present application, there is also provided an ignition gas supply method of a gas turbine.

FIG. 3 is a schematic flow chart of a method for starting a gas turbine engine according to an exemplary embodiment of the present application, referring to FIG. 3, the method comprising:

step 110, store the liquid gaseous fuel.

As previously mentioned, the liquid gaseous fuel may be LNG or LPG and may be stored by a storage tank.

Step 120, pressurizing the liquid gas fuel.

The liquid gaseous fuel stored in the foregoing step may be input to a booster pump to pressurize the liquid gaseous fuel.

And step 130, heating and gasifying the liquid gas fuel after pressurization treatment to obtain the gas fuel.

After being pressurized by the booster pump, the liquid gas fuel can be input into the vaporizer for heating and gasification.

Step 140, buffering the gas fuel, so that the pressure and the temperature of the buffered gas fuel are both kept at corresponding set values.

The gas fuel obtained after the liquid gas fuel is subjected to pressurization treatment, heating and gasification treatment can be input into the buffer tank for buffering.

In some embodiments of the present application, said step of buffering said gaseous fuel to maintain the pressure and temperature of said buffered gaseous fuel at corresponding set values comprises:

detecting the temperature and the pressure of the buffered gaseous fuel;

and controlling the pressurization, heating and gasification treatment of the liquid gas fuel according to the detected temperature and pressure so as to keep the pressure and temperature of the buffered gas fuel at corresponding set values.

And a first air pressure transmitter and a first temperature transmitter are arranged on the cache tank, and the temperature and the pressure of the cached gas fuel are detected. According to the temperature and the pressure, the frequency of the booster pump and the electric power of the vaporizer can be automatically or manually controlled by a user, so that the pressure and the temperature of the buffered gaseous fuel are maintained at corresponding set values.

And 150, supplying the buffered gas fuel as ignition gas to the gas turbine.

An air supply line may be provided in communication with the buffer tank, the air supply line supplying gas fuel from the buffer tank to the gas turbine.

In some embodiments of the present application, prior to supplying the cached gaseous fuel as an ignition gas to a gas turbine, the method further comprises:

and filtering and gas-liquid separating the cached gas fuel.

A filtering process and a gas-liquid separation process may be performed by the filter to remove impurities and moisture.

In some embodiments of the present application, the method further comprises:

and when the pressure and the temperature of the gas fuel in the gas supply pipeline close to one side of the gas turbine are both in corresponding set ranges, controlling the gas fuel to be supplied to the gas turbine.

The gas supply pipeline close to one side of the gas turbine can be respectively provided with a second gas pressure transmitter, a second temperature transmitter and a valve, wherein the valve is closest to the gas turbine, the second gas pressure transmitter is used for detecting the pressure of gas fuel in the gas supply pipeline, the second temperature transmitter is used for detecting the temperature of the gas fuel in the gas supply pipeline, and a controller which is respectively electrically connected with the second gas pressure transmitter, the second temperature transmitter and the valve can be arranged.

According to a third aspect of the present application, the present application further provides a gas turbine system.

A gas turbine system, comprising:

a gas turbine; and

the ignition gas supply apparatus as described above, the ignition gas supply apparatus communicating with an ignition gas inlet of the gas turbine.

While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.