Intelligent nitrogen purging device system of gas turbine and control method of intelligent nitrogen purging device system

Abstract

The invention provides an intelligent nitrogen purging device system of a gas turbine and a control method of the intelligent nitrogen purging device system. The intelligent nitrogen purging device system of the gas turbine comprises a nitrogen source assembly, a pressure regulating assembly, a buffer tank assembly and an intelligent control assembly which are connected in sequence, the intelligent nitrogen purging device system of the gas turbine further comprises a fuel pipeline. The fuel pipeline comprises a main combustion path fuel branch, an on-duty path fuel branch and a torch path fuel branch which are arranged in parallel; the intelligent control assembly is arranged on the fuel pipeline. The intelligent nitrogen purging device for the gas turbine is reasonable in system design and convenient to regulate and control, fuel remaining in a fuel branch is effectively purged in the ignition and combustion mode switching process of the gas turbine, risks such as spontaneous combustion and deflagration are avoided, the combustion stability and operation safety of the gas turbine are improved, and the intelligent nitrogen purging device is suitable for wide-range application and popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines, and in particular to a gas turbine nitrogen intelligent purge device system and a control method thereof. Background Art

[0002] At present, building a new power system with new energy as the main body has become an important direction for the transformation and upgrading of the power system. Based on hydrogen combustion engines, a new power system scenario of "new energy power generation-electrolysis hydrogen production-hydrogen storage-hydrogen gas turbine" is gradually constructed, which can effectively use green electricity to produce hydrogen, suppress the randomness, volatility and intermittent effects brought by new energy power generation systems such as wind power and photovoltaics, realize peak and frequency regulation functions, improve the new energy consumption capacity, and ensure the safe and stable operation of the power system.

[0003] Pure hydrogen gas turbines have fast start and stop speeds and outstanding loading capacity. They are the optimal solution for coupling new energy hydrogen production and storage with peak load regulation, and realizing large-scale consumption of green hydrogen. The pure hydrogen combustion chamber is the core component of the pure hydrogen gas turbine, which is used to convert the chemical energy of hydrogen fuel into thermal energy to drive the turbine to work. In order to meet the requirements of pure hydrogen gas turbines for combustion stability and pollutant emissions when working within the full load range, the supply of hydrogen fuel in the pure hydrogen combustion chamber is usually graded, and different hydrogen fuel supply methods are used within different load ranges.

[0004] During the start-up, load adjustment and shutdown of pure hydrogen gas turbines, different combustion modes need to be switched according to the load changes to control the input and cut-off of fuel in each level of fuel nozzle branches. After the fuel control valve of the corresponding level fuel nozzle branch is turned off, hydrogen fuel will remain in the pipeline volume after the fuel control valve, the fuel ring pipe, and other pipelines. When high-temperature air reflux occurs in the fuel branch, the air in the combustion chamber at the nozzle outlet enters this part of the pipeline volume through the nozzle and mixes with the fuel gas, which is very easy to cause danger, spontaneous combustion, and explosion accidents, causing damage to the fuel supply pipeline and burner of the pure hydrogen gas turbine. The same problem also exists in gas turbines that use natural gas or ammonia as fuel gas.

[0005] CN116641798A discloses a gas turbine, a fuel supply system and a method thereof, comprising: a gas fuel supply module for supplying gas fuel to the gas turbine; a liquid fuel supply module for supplying liquid fuel to the gas turbine; a compressed air purge module for cleaning and cooling the liquid fuel supply module; and a protective gas purge module for cleaning the gas fuel supply module. The protective gas purge module is used to clean the gas fuel supply module. Since the protective gas and the gas fuel will not undergo chemical reactions such as combustion, there will be no combustion or explosion phenomena that damage the gas fuel supply module. And after the protective gas purge module is cleaned, the compressed air purge module is used to continuously cool the protective gas purge module, and the cost is relatively low.

[0006] CN219840724U discloses a nitrogen purge system for a dual-fuel system of a medium-power gas turbine, the main structure of which includes a nitrogen purge supply pipeline and a nitrogen venting pipeline upstream of a gas fuel fuel regulating valve, the nitrogen purge supply pipeline is respectively connected to the nitrogen purge pipeline upstream of the gas fuel fuel regulating valve, the nitrogen purge pipeline downstream of the gas fuel fuel regulating valve, the liquid fuel main pipe nitrogen purge pipeline and the liquid fuel auxiliary pipe nitrogen purge pipeline, the nitrogen purge pipeline upstream of the gas fuel fuel regulating valve, the nitrogen purge pipeline downstream of the gas fuel fuel regulating valve and the nitrogen venting pipeline upstream of the gas fuel fuel regulating valve are all connected to the gas fuel pipeline, the liquid fuel main pipe nitrogen purge pipeline is connected to the liquid fuel main pipeline, and the liquid fuel auxiliary pipe nitrogen purge pipeline is connected to the liquid fuel auxiliary pipeline.

[0007] CN112727604A discloses a liquid / gas dual fuel supply system for a gas turbine, including a gas fuel supply system, a liquid fuel supply system and a compressed air purge system, wherein the gas fuel supply system is connected to the gas turbine through a gas fuel nozzle, the liquid fuel supply system is connected to the gas turbine through a liquid fuel nozzle, and the compressed air purge system is connected to the gas turbine through an air purge nozzle. The supply system modularizes the liquid and gas fuels to meet the dual fuel requirements of the gas turbine combustion system; the liquid fuel supply system is equipped with a liquid one-way valve, which can provide sufficient oil supply to the liquid fuel pump and recover the pressure energy in the return oil, saving the power consumption of the booster pump motor and reducing the failure rate of the booster pump; an effective compressed air purge system is configured to effectively prevent the carbon deposition problem of the liquid fuel nozzle.

[0008] However, the above-mentioned gas turbine still has problems such as insufficient nitrogen purge pressure and poor combustion stability of the gas turbine. Summary of the invention

[0009] In view of the problems existing in the prior art, the present invention provides a gas turbine nitrogen intelligent purge device system and a control method thereof. By setting a buffer tank assembly and an intelligent control assembly, the main combustion circuit fuel branch, the duty circuit fuel branch and the flare circuit fuel branch arranged in parallel are effectively purged with nitrogen before fuel is supplied and after fuel is withdrawn, so as to clean up the residual gas fuel in each fuel branch, avoid the danger of backfire, deflagration, etc. when high-temperature gas reflux occurs in each fuel branch, and ensure the safety and stability of the gas turbine when the combustion mode is switched.

[0010] To achieve this object, the present invention adopts the following technical solutions:

[0011] In a first aspect, the present invention provides a gas turbine nitrogen intelligent purge device system, the gas turbine nitrogen intelligent purge device system comprising a nitrogen source component, a pressure regulating component, a buffer tank component and an intelligent control component connected in sequence;

[0012] The gas turbine nitrogen intelligent purge device system also includes a fuel pipeline; the fuel pipeline includes a main combustion fuel branch, a duty fuel branch and a flare fuel branch arranged in parallel;

[0013] The intelligent control component is arranged on the fuel pipeline.

[0014] The pressure regulating component in the gas turbine nitrogen intelligent purging device system described in the present invention can adjust the gas supply of the nitrogen source component and the purging gas source pressure of the fuel branch according to the operating load or combustion mode of the gas turbine; the buffer tank component is used to buffer the purging nitrogen source pressure to ensure that the gas turbine has a suitable pressure when performing nitrogen purging; the intelligent control component is arranged on the fuel pipeline to control the on and off of the corresponding fuel branch, and can effectively isolate the nitrogen source from the fuel gas to ensure the safety of the gas turbine purging process.

[0015] The fuel pipeline described in the present invention includes a main combustion fuel branch, a duty fuel branch and a flare fuel branch arranged in parallel, which meet the needs of gas turbine ignition and combustion mode switching, and by nitrogen purging each fuel branch before supplying the corresponding fuel and after the fuel is withdrawn, the residual fuel in the fuel branch can be cleaned, thereby ensuring successful ignition of the gas turbine, combustion mode switching operating condition adjustment and safe and stable operation.

[0016] Preferably, the gas turbine nitrogen intelligent purge device system further includes a first manual stop valve and a second manual stop valve.

[0017] Preferably, the first manual stop valve is arranged between the pressure regulating assembly and the buffer tank assembly.

[0018] Preferably, the second manual stop valve is arranged between the buffer tank assembly and the intelligent control assembly.

[0019] Preferably, the buffer tank assembly comprises a buffer tank, a first pressure detection device and a pressure relief device, wherein the pressure relief device is used to prevent the buffer tank from being over-pressurized.

[0020] Preferably, the first pressure detection device and the pressure relief device are arranged on the top of the buffer tank.

[0021] Preferably, the pressure relief device is connected to the bulk tower device.

[0022] Preferably, the gas turbine nitrogen intelligent purge device system further comprises a check valve assembly arranged between the second manual stop valve and the intelligent control assembly.

[0023] Preferably, the check valve assembly includes a first check valve, a second check valve and a third check valve which are respectively arranged on the main combustion circuit fuel branch, the duty circuit fuel branch and the flare circuit fuel branch.

[0024] Preferably, the main combustion circuit fuel branch, the duty circuit fuel branch and the flare circuit fuel branch are also respectively provided with a second pressure detection device, a third pressure detection device and a fourth pressure detection device, which are used to detect the nitrogen purge pressure in the fuel branch and monitor whether the nitrogen purge pressure meets the gas turbine operation requirements.

[0025] Preferably, the intelligent control component includes a purge electromagnetic switch valve component and an electromagnetic relief valve component.

[0026] Preferably, the purge solenoid switch valve assembly includes a first purge solenoid switch valve, a second purge solenoid switch valve, a third purge solenoid switch valve, a fourth purge solenoid switch valve, a fifth purge solenoid switch valve and a sixth purge solenoid switch valve.

[0027] Preferably, the first purge solenoid switch valve and the second purge solenoid switch valve are sequentially arranged on the fuel branch of the main combustion circuit.

[0028] Preferably, the third purge solenoid switch valve and the fourth purge solenoid switch valve are sequentially arranged on the duty fuel branch line.

[0029] Preferably, the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve are sequentially arranged on the fuel branch of the flare circuit.

[0030] Preferably, the electromagnetic relief valve assembly includes a first electromagnetic relief valve, a second electromagnetic relief valve and a third electromagnetic relief valve, which are used to release nitrogen in the corresponding fuel branch.

[0031] The present invention arranges two purge electromagnetic switch valves on each fuel branch to realize redundant control, which is used to control the on-off of the fuel branch and effectively isolate the nitrogen source from the fuel to ensure the safety of the gas turbine purge process.

[0032] Preferably, the first electromagnetic relief valve is arranged between the first purge electromagnetic switch valve and the purge tower device.

[0033] Preferably, the second electromagnetic relief valve is arranged between the third purge electromagnetic switch valve and the purge tower device.

[0034] Preferably, the third electromagnetic relief valve is arranged between the fifth purge electromagnetic switch valve and the purge tower device.

[0035] In a second aspect, the present invention further provides a control method for a gas turbine nitrogen intelligent purge device system as described in the first aspect, the control method comprising the following steps:

[0036] (1) The nitrogen provided by the nitrogen source assembly enters the buffer tank assembly after being pressure-regulated by the pressure regulating assembly, and nitrogen is purged to the flare fuel branch under the control of the intelligent control assembly, and the flare fuel is supplied to the ignition burner of the gas turbine to ignite the gas turbine;

[0037] (2) After nitrogen purge is performed on the duty fuel branch, the duty fuel is supplied to the duty burner of the gas turbine, the flare fuel is withdrawn and the flare fuel branch is purged with nitrogen;

[0038] (3) After nitrogen is purged into the main combustion path fuel branch, the main combustion path fuel is supplied to the main combustion burner of the gas turbine to complete the switching of the gas turbine combustion mode.

[0039] The control method of the gas turbine nitrogen intelligent purge device system described in the present invention performs nitrogen purge regulation on the gas turbine ignition and combustion mode switching process through an intelligent control component, effectively avoiding the dangers of spontaneous combustion or deflagration when high-temperature gas reflux occurs in each fuel branch, thereby improving the operating safety and temperature resistance of the gas turbine.

[0040] Preferably, before nitrogen is purged on the flare fuel branch in step (1), the first manual stop valve and the second manual stop valve are opened.

[0041] The step of nitrogen purging the flare road fuel branch includes: closing the third electromagnetic relief valve, opening the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, and purging the flare road fuel branch with nitrogen, which can discharge the air in the flare road fuel branch and effectively isolate the air and fuel.

[0042] Preferably, before the main combustion path fuel is supplied to the main combustion burner of the gas turbine, the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve are closed, the third electromagnetic relief valve is opened, and the purge of the flare path fuel branch is terminated.

[0043] Preferably, the fuel includes any one of hydrogen fuel, natural gas fuel or ammonia fuel, or a combination of at least two of them.

[0044] Preferably, the step (2) of nitrogen purging the duty road fuel branch includes: closing the second electromagnetic relief valve, opening the third purge electromagnetic switch valve and the fourth purge electromagnetic switch valve, and purging the duty road fuel branch with nitrogen.

[0045] Preferably, before the duty road fuel is supplied to the duty burner of the gas turbine, the third purge solenoid switch valve and the fourth purge solenoid switch valve are closed, the second solenoid relief valve is opened, and the purge of the duty road fuel branch is exited.

[0046] Preferably, the step of nitrogen purging the flare fuel branch includes: closing the third electromagnetic relief valve, opening the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, and purging the flare fuel branch with nitrogen. After the purge is completed, the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve are closed, and the third electromagnetic relief valve is opened to exit the purge of the flare fuel branch.

[0047] Preferably, the step (3) of nitrogen purging the main combustion circuit fuel branch comprises: closing the first electromagnetic relief valve, opening the first purge electromagnetic switch valve and the second purge electromagnetic switch valve, and purging the main combustion circuit fuel branch with nitrogen.

[0048] Preferably, before the main combustion circuit fuel is supplied to the main combustion burner of the gas turbine, the first purge electromagnetic switch valve and the second purge electromagnetic switch valve are closed, and the first electromagnetic relief valve is opened to exit the purge of the main combustion circuit fuel branch.

[0049] As a preferred technical solution of the present invention, the control method comprises the following steps:

[0050] (1) Open the first manual stop valve and the second manual stop valve, and the nitrogen provided by the nitrogen source assembly enters the buffer tank assembly after being pressure-regulated by the pressure regulating assembly, close the third electromagnetic relief valve, open the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, and purge the flare fuel branch with nitrogen; then, close the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, open the third electromagnetic relief valve, exit the purge of the flare fuel branch, and use the flare fuel to supply the ignition burner of the gas turbine to ignite the gas turbine;

[0051] The fuel includes any one of hydrogen fuel, natural gas fuel or ammonia fuel, or a combination of at least two of them;

[0052] (2) Close the second electromagnetic relief valve, open the third purge electromagnetic switch valve and the fourth purge electromagnetic switch valve, and purge the duty road fuel branch with nitrogen; then, close the third purge electromagnetic switch valve and the fourth purge electromagnetic switch valve, open the second electromagnetic relief valve, exit the purge of the duty road fuel branch, use the duty road fuel to supply the duty burner of the gas turbine, and exit the flare road fuel; then, close the third electromagnetic relief valve, open the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, and purge the flare road fuel branch with nitrogen; after the purge is completed, close the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, open the third electromagnetic relief valve, and exit the purge of the flare road fuel branch;

[0053] (3) Close the first electromagnetic relief valve, open the first purge electromagnetic switch valve and the second purge electromagnetic switch valve, and purge the main combustion circuit fuel branch with nitrogen; then, close the first purge electromagnetic switch valve and the second purge electromagnetic switch valve, open the first electromagnetic relief valve, exit the purge of the main combustion circuit fuel branch, and use the main combustion circuit fuel to supply the main combustion burner of the gas turbine to complete the switching of the gas turbine combustion mode.

[0054] Compared with the prior art, the present invention has at least the following beneficial effects:

[0055] The gas turbine nitrogen intelligent purge device system provided by the present invention has a reasonable design and is easy to control, and realizes sufficient and effective nitrogen purge during the ignition and combustion mode switching of the gas turbine, thereby improving the combustion stability and operation safety of the gas turbine, and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of a gas turbine nitrogen intelligent purge device system in a specific implementation manner of the present invention.

[0057] In the figure: 1-nitrogen gas source assembly; 2-pressure regulating assembly; 3-first manual stop valve; 4-buffer tank; 5-first pressure detection device; 6-pressure relief device; 7-second manual stop valve; 8-first check valve; 9-second check valve; 10-third check valve; 11-first purge solenoid switch valve; 12-third purge solenoid switch valve; 13-fifth purge solenoid switch valve; 14-second purge solenoid switch valve; 15-fourth purge solenoid switch valve; 16-sixth purge solenoid switch valve; 17-first solenoid relief valve; 18-second solenoid relief valve; 19-third solenoid relief valve; 20-dispersion tower device; 21-main combustion fuel branch; 22-duty fuel branch; 23-flare fuel branch. DETAILED DESCRIPTION

[0058] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0059] The present invention is further described in detail below. However, the following examples are only simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0060] It should be understood that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0061] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0062] Those skilled in the art should understand that the present invention necessarily includes necessary pipelines, conventional valves and general pump equipment for realizing a complete process, but the above content does not belong to the main inventive point of the present invention. Those skilled in the art can add layouts on their own based on the process flow and equipment structure selection, and the present invention does not make special requirements and specific limitations on this.

[0063] As a specific embodiment of the present invention, a gas turbine nitrogen intelligent purge device system is provided, and its schematic diagram is as follows: Figure 1 shown.

[0064] The gas turbine nitrogen intelligent purge device system comprises a nitrogen source component 1, a pressure regulating component 2, a buffer tank component and an intelligent control component connected in sequence;

[0065] The gas turbine nitrogen intelligent purge device system also includes a fuel pipeline; the fuel pipeline includes a main combustion fuel branch 21, a duty fuel branch 22 and a flare fuel branch 23 arranged in parallel;

[0066] The intelligent control component is arranged on the fuel pipeline.

[0067] The gas turbine nitrogen intelligent purge device system also includes a first manual stop valve 3 and a second manual stop valve 7;

[0068] The first manual stop valve 3 is arranged between the pressure regulating assembly 2 and the buffer tank assembly;

[0069] The second manual stop valve 7 is arranged between the buffer tank component and the intelligent control component.

[0070] The buffer tank assembly includes a buffer tank 4, a first pressure detection device 5 and a pressure relief device 6;

[0071] The first pressure detection device 5 and the pressure relief device 6 are arranged on the top of the buffer tank 4;

[0072] The pressure relief device 6 is connected to the bulk tower device 20 .

[0073] The gas turbine nitrogen intelligent purge device system also includes a check valve component arranged between the second manual stop valve 7 and the intelligent control component;

[0074] The check valve assembly comprises a first check valve 8, a second check valve 9 and a third check valve 10 which are respectively arranged on the main combustion circuit fuel branch 21, the duty circuit fuel branch 22 and the flare circuit fuel branch 23.

[0075] The main combustion fuel branch 21, the duty fuel branch 22 and the flare fuel branch 23 are also provided with a second pressure detection device, a third pressure detection device and a fourth pressure detection device respectively, which are not shown in the figure.

[0076] The intelligent control component includes a purge electromagnetic switch valve component and an electromagnetic relief valve component;

[0077] The purge electromagnetic switch valve assembly includes a first purge electromagnetic switch valve 11, a second purge electromagnetic switch valve 14, a third purge electromagnetic switch valve 12, a fourth purge electromagnetic switch valve 15, a fifth purge electromagnetic switch valve 13 and a sixth purge electromagnetic switch valve 16;

[0078] The first purge electromagnetic switch valve 11 and the second purge electromagnetic switch valve 14 are sequentially arranged on the main combustion circuit fuel branch 21;

[0079] The third purge electromagnetic switch valve 12 and the fourth purge electromagnetic switch valve 15 are sequentially arranged on the duty fuel branch 22;

[0080] The fifth purge electromagnetic switch valve 13 and the sixth purge electromagnetic switch valve 16 are sequentially arranged on the flare fuel branch 23;

[0081] The electromagnetic relief valve assembly includes a first electromagnetic relief valve 17, a second electromagnetic relief valve 18 and a third electromagnetic relief valve 19;

[0082] The first electromagnetic relief valve 17 is arranged between the first purge electromagnetic switch valve 11 and the purge tower device 20;

[0083] The second electromagnetic relief valve 18 is arranged between the third purge electromagnetic switch valve 12 and the purge tower device 20;

[0084] The third electromagnetic relief valve 19 is arranged between the fifth purge electromagnetic switch valve 13 and the purge tower device 20 .

[0085] As a specific embodiment of the present invention, a control method for the above-mentioned gas turbine nitrogen intelligent purge device system is also provided, and the control method comprises the following steps:

[0086] (1) Open the first manual stop valve 3 and the second manual stop valve 7, close the third electromagnetic relief valve 19, open the fifth purge electromagnetic switch valve 13 and the sixth purge electromagnetic switch valve 16, and purge the flare fuel branch 23 with nitrogen; then, close the fifth purge electromagnetic switch valve 13 and the sixth purge electromagnetic switch valve 16, open the third electromagnetic relief valve 19, stop the purge of the flare fuel branch 23, and use the flare fuel to supply the ignition burner of the gas turbine to ignite the gas turbine;

[0087] The fuel is hydrogen fuel;

[0088] (2) Close the second electromagnetic relief valve 18, open the third purge electromagnetic switch valve 12 and the fourth purge electromagnetic switch valve 15, and purge the duty road fuel branch 22 with nitrogen; then, close the third purge electromagnetic switch valve 12 and the fourth purge electromagnetic switch valve 15, open the second electromagnetic relief valve 18, exit the purge of the duty road fuel branch 22, use the duty road fuel to supply the duty burner of the gas turbine, and exit the flare road fuel; then, close the third electromagnetic relief valve 19, open the fifth purge electromagnetic switch valve 13 and the sixth purge electromagnetic switch valve 16, and purge the flare road fuel branch 23 with nitrogen; after the purge is completed, close the fifth purge electromagnetic switch valve 13 and the sixth purge electromagnetic switch valve 16, open the third electromagnetic relief valve 19, and exit the purge of the flare road fuel branch;

[0089] (3) The first electromagnetic relief valve 17 is closed, and the first purge electromagnetic switch valve 11 and the second purge electromagnetic switch valve 14 are opened to purge the main combustion path fuel branch 21 with nitrogen; then, the first purge electromagnetic switch valve 11 and the second purge electromagnetic switch valve 14 are closed, and the first electromagnetic relief valve 17 is opened to exit the purge of the main combustion path fuel branch 21, and the main combustion path fuel is supplied to the main combustion burner of the gas turbine to complete the switching of the gas turbine combustion mode.

[0090] In summary, the gas turbine nitrogen intelligent purge device system provided by the present invention has a reasonable design and is easy to control. It can effectively purge the residual fuel in the fuel branch during the gas turbine ignition and combustion mode switching process, avoid the dangers of spontaneous combustion and deflagration in the fuel branch, improve the combustion stability and operation safety of the gas turbine, and is suitable for large-scale promotion and application.

[0091] The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned detailed structural features, that is, it does not mean that the present invention must rely on the above-mentioned detailed structural features to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the components selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0092] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

Claims

1. A gas turbine nitrogen intelligent purge device system, characterized in that: The gas turbine nitrogen intelligent purge device system comprises a nitrogen source component, a pressure regulating component, a buffer tank component and an intelligent control component connected in sequence; The gas turbine nitrogen intelligent purge device system also includes a fuel pipeline; the fuel pipeline includes a main combustion fuel branch, a duty fuel branch and a flare fuel branch arranged in parallel; The intelligent control component is arranged on the fuel pipeline.

2. The gas turbine nitrogen intelligent purge device system according to claim 1, characterized in that: The gas turbine nitrogen intelligent purge device system also includes a first manual stop valve and a second manual stop valve; Preferably, the first manual stop valve is arranged between the pressure regulating assembly and the buffer tank assembly; Preferably, the second manual stop valve is arranged between the buffer tank assembly and the intelligent control assembly.

3. The gas turbine nitrogen intelligent purge device system according to claim 1 or 2, characterized in that: The buffer tank assembly includes a buffer tank, a first pressure detection device and a pressure relief device; Preferably, the first pressure detection device and the pressure relief device are arranged on the top of the buffer tank; Preferably, the pressure relief device is connected to the bulk tower device.

4. The gas turbine nitrogen intelligent purge system according to any one of claims 1 to 3, characterized in that: The gas turbine nitrogen intelligent purge device system also includes a check valve component arranged between the second manual stop valve and the intelligent control component; Preferably, the check valve assembly comprises a first check valve, a second check valve and a third check valve respectively arranged on the fuel branch of the main combustion circuit, the fuel branch of the duty circuit and the fuel branch of the flare circuit; Preferably, the main combustion circuit fuel branch, the duty circuit fuel branch and the flare circuit fuel branch are also provided with a second pressure detection device, a third pressure detection device and a fourth pressure detection device respectively.

5. The gas turbine nitrogen intelligent purge system according to any one of claims 1 to 4, characterized in that: The intelligent control component includes a purge electromagnetic switch valve component and an electromagnetic relief valve component; Preferably, the purge electromagnetic switch valve assembly includes a first purge electromagnetic switch valve, a second purge electromagnetic switch valve, a third purge electromagnetic switch valve, a fourth purge electromagnetic switch valve, a fifth purge electromagnetic switch valve and a sixth purge electromagnetic switch valve; Preferably, the first purge electromagnetic switch valve and the second purge electromagnetic switch valve are sequentially arranged on the fuel branch of the main combustion circuit; Preferably, the third purge electromagnetic switch valve and the fourth purge electromagnetic switch valve are sequentially arranged on the duty fuel branch; Preferably, the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve are sequentially arranged on the fuel branch of the flare circuit; Preferably, the electromagnetic relief valve assembly includes a first electromagnetic relief valve, a second electromagnetic relief valve and a third electromagnetic relief valve; Preferably, the first electromagnetic relief valve is arranged between the first purge electromagnetic switch valve and the purge tower device; Preferably, the second electromagnetic relief valve is arranged between the third purge electromagnetic switch valve and the purge tower device; Preferably, the third electromagnetic relief valve is arranged between the fifth purge electromagnetic switch valve and the purge tower device.

6. A control method for a gas turbine nitrogen intelligent purge system according to any one of claims 1 to 5, characterized in that: The control method comprises the following steps: (1) The nitrogen provided by the nitrogen source assembly enters the buffer tank assembly after being pressure-regulated by the pressure regulating assembly, and nitrogen is purged to the flare fuel branch under the control of the intelligent control assembly, and the flare fuel is supplied to the ignition burner of the gas turbine to ignite the gas turbine; (2) After nitrogen purge is performed on the duty fuel branch, the duty fuel is supplied to the duty burner of the gas turbine, the flare fuel is withdrawn and the flare fuel branch is purged with nitrogen; (3) After nitrogen is purged into the main combustion path fuel branch, the main combustion path fuel is supplied to the main combustion burner of the gas turbine to complete the switching of the gas turbine combustion mode.

7. The control method according to claim 6, characterized in that: Before nitrogen purging the flare fuel branch in step (1), open the first manual stop valve and the second manual stop valve; The step of nitrogen purging the flare fuel branch comprises: closing the third electromagnetic relief valve, opening the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, and purging the flare fuel branch with nitrogen; Preferably, before the main combustion path fuel is supplied to the main combustion burner of the gas turbine, the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve are closed, and the third electromagnetic relief valve is opened to exit the purge of the flare path fuel branch; Preferably, the fuel includes any one of hydrogen fuel, natural gas fuel or ammonia fuel, or a combination of at least two of them.

8. The control method according to claim 6 or 7, characterized in that: The step (2) of nitrogen purging the duty fuel branch comprises: closing the second electromagnetic relief valve, opening the third purge electromagnetic switch valve and the fourth purge electromagnetic switch valve, and purging the duty fuel branch with nitrogen; Preferably, before the duty road fuel is supplied to the duty burner of the gas turbine, the third purge electromagnetic switch valve and the fourth purge electromagnetic switch valve are closed, the second electromagnetic relief valve is opened, and the purge of the duty road fuel branch is terminated; Preferably, the step of nitrogen purging the flare road fuel branch includes: closing the third electromagnetic relief valve, opening the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, and purging the flare road fuel branch with nitrogen; after the purge is completed, closing the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, opening the third electromagnetic relief valve, and exiting the purge of the flare road fuel branch.

9. The control method according to any one of claims 6 to 8, characterized in that: The step (3) of nitrogen purging the fuel branch of the main combustion path comprises: closing the first electromagnetic relief valve, opening the first purge electromagnetic switch valve and the second purge electromagnetic switch valve, and purging the fuel branch of the main combustion path with nitrogen; Preferably, before the main combustion circuit fuel is supplied to the main combustion burner of the gas turbine, the first purge electromagnetic switch valve and the second purge electromagnetic switch valve are closed, and the first electromagnetic relief valve is opened to exit the purge of the main combustion circuit fuel branch.

10. The control method according to any one of claims 6 to 9, characterized in that: The control method comprises the following steps: (1) Open the first manual stop valve and the second manual stop valve, and the nitrogen provided by the nitrogen source assembly enters the buffer tank assembly after being pressure-regulated by the pressure regulating assembly, close the third electromagnetic relief valve, open the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, and purge the flare fuel branch with nitrogen; then, close the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, open the third electromagnetic relief valve, exit the purge of the flare fuel branch, and use the flare fuel to supply the ignition burner of the gas turbine to ignite the gas turbine; The fuel includes any one of hydrogen fuel, natural gas fuel or ammonia fuel, or a combination of at least two of them; (2) Close the second electromagnetic relief valve, open the third purge electromagnetic switch valve and the fourth purge electromagnetic switch valve, and purge the duty road fuel branch with nitrogen; then, close the third purge electromagnetic switch valve and the fourth purge electromagnetic switch valve, open the second electromagnetic relief valve, exit the purge of the duty road fuel branch, use the duty road fuel to supply the duty burner of the gas turbine, and exit the flare road fuel; then, close the third electromagnetic relief valve, open the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, and purge the flare road fuel branch with nitrogen; after the purge is completed, close the fifth purge electromagnetic switch valve and the sixth purge electromagnetic switch valve, open the third electromagnetic relief valve, and exit the purge of the flare road fuel branch; (3) Close the first electromagnetic relief valve, open the first purge electromagnetic switch valve and the second purge electromagnetic switch valve, and purge the main combustion circuit fuel branch with nitrogen; then, close the first purge electromagnetic switch valve and the second purge electromagnetic switch valve, open the first electromagnetic relief valve, exit the purge of the main combustion circuit fuel branch, and use the main combustion circuit fuel to supply the main combustion burner of the gas turbine to complete the switching of the gas turbine combustion mode.

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