An easily adjustable gas turbine air supply system

Abstract

The utility model relates to the technical field of gas turbine air supply, and in particular to a gas turbine air supply system that is easy to adjust, including an air supply source and a gas turbine, the air supply source is connected to the air inlet end of the air supply pipeline, the air supply pipeline is provided with a first shut-off valve, an auxiliary pipeline air inlet end and a first regulating component in sequence from the air inlet end, the auxiliary pipeline is provided with a second regulating component, and the air outlet ends of the air supply pipeline and the auxiliary pipeline are both connected to the gas turbine. The utility model supplies air to the gas turbine by setting an air supply pipeline and an auxiliary pipeline, and the two cooperate with each other to not only meet the requirements of normal operation of the gas turbine, but also facilitate the adjustment of air supply parameters through the first regulating component and the second regulating component when the load of the gas turbine changes, effectively ensuring stable combustion.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbine air supply, in particular to a gas turbine air supply system which is easy to adjust. Background Art

[0002] The rapid development of the new energy industry has brought tremendous pressure to the grid structure and the safe and stable operation of the grid. As a clean energy generator set supporting the grid, gas turbines, in addition to their advantages of rapid start and stop and deep peak regulation, also play an important role in optimizing the energy structure, promoting energy conservation and emission reduction, alleviating the contradiction between electricity supply and demand, and ensuring the safety and stability of the grid. Especially in the context of "dual carbon", gas turbine distributed energy systems are receiving more and more attention.

[0003] The natural gas for power plants is provided by gas companies. The gas supply pressure of gas turbines is often affected by the pressure fluctuations of the gas pipeline network. Once any equipment in the gas supply system has a problem, it will affect the safe and stable operation of the unit, causing huge economic losses to the enterprise and also putting great pressure on the safe and stable operation of the power grid. Therefore, it is crucial to design a gas turbine gas supply system that is easy to adjust, safe and reliable for the safe and stable operation of the unit. Utility Model Content

[0004] The utility model aims to provide an easily adjustable gas turbine air supply system, which can not only meet the requirements of normal operation of the gas turbine, but also is easy to adjust when the gas turbine load changes.

[0005] The utility model provides an easily adjustable gas turbine air supply system, comprising an air supply source and a gas turbine, wherein the air supply source is connected to an air inlet end of an air supply pipeline, the air supply pipeline is provided with a first shut-off valve, an auxiliary pipeline air inlet end and a first regulating component in sequence from the air inlet end, the auxiliary pipeline is provided with a second regulating component, and the air outlet ends of the air supply pipeline and the auxiliary pipeline are both connected to the gas turbine.

[0006] Preferably, the first regulating assembly includes a first pressure control valve and a first flow control valve, and the second regulating assembly includes a second pressure control valve and a second flow control valve.

[0007] Preferably, the first regulating assembly further includes a third pressure control valve, and the third pressure control valve is connected in parallel with the first pressure control valve.

[0008] Preferably, a first burner nozzle is provided at the gas outlet end of the gas supply pipe, and a second burner nozzle is connected to the gas outlet end of the auxiliary pipe.

[0009] Preferably, an exhaust pipe is further provided on the air supply pipeline, the air supply pipelines before and after the first shut-off valve are connected to the exhaust pipe, and a discharge valve is provided on the exhaust pipe.

[0010] Preferably, a first air pump and a first temperature sensor are sequentially provided on the air supply pipeline between the air supply source and the first shut-off valve.

[0011] Preferably, the air supply pipe downstream of the first temperature sensor is connected to one end of a return air pipe, the other end of the return air pipe is connected to a gas storage tank, and a second shut-off valve is provided on the return air pipe.

[0012] Preferably, a connecting pipe is provided between the gas storage tank and the gas supply source, and a gas heat exchanger is provided on the connecting pipe.

[0013] Preferably, a second air pump is provided between the gas heat exchanger and the gas storage tank.

[0014] Preferably, a second temperature sensor and a third shut-off valve are provided between the gas heat exchanger and the gas supply source.

[0015] Beneficial effects:

[0016] The utility model provides gas supply to the gas turbine by setting up the gas supply pipeline and the auxiliary pipeline, which cooperate with each other to not only meet the normal operation requirements of the gas turbine, but also facilitate the adjustment of the gas supply parameters through the first adjustment component and the second adjustment component when the gas turbine load changes, effectively ensuring stable combustion. The utility model improves the safety and reliability of the gas supply system, which is conducive to ensuring the safe and stable operation of the gas turbine unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Description of reference numerals:

[0020] 1-gas supply source, 2-gas turbine, 3-gas storage tank, 4-gas supply pipeline, 5-return air pipeline, 6-connecting pipeline, 7-auxiliary pipeline, 8-exhaust pipe, 9-first air pump, 10-first temperature sensor, 11-discharge valve, 12-first shut-off valve, 13-first pressure control valve, 14-first flow control valve, 15-second pressure control valve, 16-second flow control valve, 17-third pressure control valve, 18-bypass pipeline, 19-first burner nozzle, 20-second burner nozzle, 21-second air pump, 22-gas heat exchanger, 23-second temperature sensor, 24-third shut-off valve, 25-second shut-off valve. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Example 1

[0025] like Figure 1As shown, an easily adjustable gas supply system for a gas turbine 2 includes a gas supply source 1 and a gas turbine 2. The gas supply source 1 can be in the form of a gas supply tank, etc., and can pre-treat the gas. The gas supply source 1 is connected to the air inlet end of a gas supply pipeline 4, and the gas supply pipeline 4 is connected to an auxiliary pipeline 7. The gas supply pipeline 4 is provided with a first air pump 9, a first temperature sensor 10, a first shut-off valve 12, an auxiliary pipeline 7 air inlet end and a first regulating component in sequence from the air inlet end, and the auxiliary pipeline 7 is provided with a second regulating component.

[0026] The first regulating assembly includes a first pressure control valve 13 and a first flow control valve 14 arranged on the gas supply pipeline 4, and the first regulating assembly also includes a third pressure control valve 17. The gas supply pipeline 4 is provided with a bypass pipeline 18 connected in parallel with the first pressure control valve 13. The third pressure control valve 17 is arranged on the bypass pipeline 18 and is connected in parallel with the first pressure control valve 13. The first pressure control valve 13 and the third pressure control valve 17 are redundantly designed and standby for each other. When the first pressure control valve 13 is closed, the third pressure control valve 17 is used to still regulate the gas supply pressure of the gas supply pipeline 4. The second regulating assembly includes a second pressure control valve 15 and a second flow control valve 16 arranged on the auxiliary pipeline 7. The pressure and flow of the gas in the pipeline can be simply and effectively regulated by the first regulating assembly and the second regulating assembly. The gas supply pipeline 4 and the auxiliary pipeline 7 are used to supply gas to the gas turbine 2. The cooperation between the two can not only meet the normal operation requirements of the gas turbine 2, but also facilitate the adjustment of the gas supply parameters through the first regulating assembly and the second regulating assembly when the load of the gas turbine 2 changes, effectively ensuring stable combustion.

[0027] An exhaust pipe 8 is also provided on the gas supply pipeline 4. The gas supply pipelines 4 before and after the first shut-off valve 12 are connected to the exhaust pipe 8. A discharge valve 11 is provided on the exhaust pipe 8 to facilitate the discharge of gas during maintenance.

[0028] The gas outlet of the gas supply pipeline 4 is provided with a first burner nozzle 19, the gas outlet of the auxiliary pipeline 7 is connected to a second burner nozzle 20, and the gas outlets of the gas supply pipeline 4 and the auxiliary pipeline 7 are both connected to the gas turbine 2, so that gas can be supplied simultaneously. Even if a problem occurs in one of the gas supply pipeline 4 and the auxiliary pipeline 7, the gas supply can still be guaranteed to be stable.

[0029] The gas supply pipe 4 downstream of the first temperature sensor 10 is connected to the gas inlet end of the return pipe 5, and the other end of the return pipe 5 is connected to the gas storage tank 3. The return pipe 5 is provided with a second shut-off valve 25. A connecting pipe 6 is provided between the gas storage tank 3 and the gas supply source 1. The connecting pipe 6 is provided with a gas heat exchanger 22, a second air pump 21, a second temperature sensor 23 and a third shut-off valve 24 in sequence from the end close to the gas storage tank 3. In the initial stage of gas supply, the gas temperature is prone to be too low. When the first temperature sensor 10 detects that the temperature in the gas supply pipe 4 is lower than the set value, the controller closes the first shut-off valve 12, and the gas enters the gas storage tank 3 through the return pipe 5, and then is transported to the gas supply source 1 under the action of the second air pump 21. When the gas passes through the gas heat exchanger 22, the gas is heated, and the second temperature sensor 23 can detect the gas temperature after heating.

[0030] The first shut-off valve 12, the second shut-off valve 25, the third shut-off valve 24, the first pressure control valve 13, the second pressure control valve 15, the third pressure control valve 17, the first flow control valve 14, and the second flow control valve 16 are all connected to the DCS system and the controller, and the first temperature sensor 10, the second temperature sensor 23, and the discharge valve 11 are all electrically connected to the controller, so as to control the operation of each pipeline in the utility model. The controller and the DCS system are both commonly used devices in the technical field of the art, and are omitted in the figure.

[0031] The utility model can also connect the gas supply source 1 to multiple gas supply pipelines 4, and different gas supply pipelines 4 do not affect each other, so that gas can be supplied to the burners of multiple gas turbines 2.

[0032] Working principle:

[0033] The gas supply source 1 supplies gas through the gas supply pipeline 4. The first temperature sensor 10 can detect the real-time temperature of the gas in the gas supply pipeline 4. When the first temperature sensor 10 detects that the temperature in the gas supply pipeline 4 is lower than the set value, the controller closes the first shut-off valve 12 and opens the second shut-off valve 25. The gas enters the gas storage tank 3 through the return gas pipeline 5, and is then transported to the gas supply source 1 under the action of the second gas pump 21. When the gas passes through the gas heat exchanger 22, the gas is heated, and the second temperature sensor 23 can detect the temperature of the heated gas.

[0034] When the first temperature sensor 10 detects that the temperature in the gas supply pipeline 4 meets the set temperature, the second shut-off valve 25 is closed, the first shut-off valve 12 is opened, and the gas is supplied to the gas turbine 2 through the first burner nozzle 19; when the first regulating component fails, the gas can be supplied to the gas turbine 2 through the auxiliary pipeline 7 and the second burner nozzle 20, effectively avoiding the failure of a single gas supply pipeline 4 affecting the safe and stable operation of the unit.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A gas turbine air supply system that is easy to adjust, characterized in that: It includes an air supply source and a gas turbine, the air supply source is connected to the air inlet end of the air supply pipeline, the air supply pipeline is provided with a first shut-off valve, an auxiliary pipeline air inlet end and a first regulating component in sequence from the air inlet end, the auxiliary pipeline is provided with a second regulating component, the first regulating component includes a first pressure control valve and a first flow control valve, the second regulating component includes a second pressure control valve and a second flow control valve, and the air outlet ends of the air supply pipeline and the auxiliary pipeline are both connected to the gas turbine.

2. The easily adjustable gas turbine air supply system according to claim 1, characterized in that: The first regulating assembly further includes a third pressure control valve, and the third pressure control valve is connected in parallel with the first pressure control valve.

3. The easily adjustable gas turbine air supply system according to claim 1, characterized in that: The gas outlet end of the gas supply pipeline is provided with a first burner nozzle, and the gas outlet end of the auxiliary pipeline is connected to a second burner nozzle.

4. The easily adjustable gas turbine air supply system according to claim 1, characterized in that: An exhaust pipe is also provided on the air supply pipeline, and the air supply pipelines before and after the first shut-off valve are connected to the exhaust pipe, and a discharge valve is provided on the exhaust pipe.

5. The easily adjustable gas turbine air supply system according to claim 1, characterized in that: The air supply pipeline between the air supply source and the first shut-off valve is provided with a first air pump and a first temperature sensor in sequence.

6. The easily adjustable gas turbine air supply system according to claim 5, characterized in that: The air supply pipeline downstream of the first temperature sensor is connected to one end of a return air pipeline, and the other end of the return air pipeline is connected to a gas storage tank. A second shut-off valve is provided on the return air pipeline.

7. The easily adjustable gas turbine air supply system according to claim 6, characterized in that: A communication pipeline is provided between the gas storage tank and the gas supply source, and a gas heat exchanger is provided on the communication pipeline.

8. The easily adjustable gas turbine air supply system according to claim 7, characterized in that: A second air pump is provided between the gas heat exchanger and the gas storage tank.

9. The easily adjustable gas turbine air supply system according to claim 7, characterized in that: A second temperature sensor and a third shut-off valve are provided between the gas heat exchanger and the gas supply source.

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