Ignition and gas storage device for gas power plant

Abstract

The utility model discloses an ignition and gas storage device for a gas power plant, and relates to the technical field of gas power generation. Comprising a vaporization gas storage tank which is internally provided with a heating coil and is connected with a combustion chamber of a gas turbine, and liquid-phase propane in the vaporization gas storage tank is heated through the heating coil to be vaporized into low-temperature fuel gas which enters the combustion chamber of the gas turbine; the tank car is connected with the vaporizing gas storage tank and is used for storing liquid-phase propane and recycling vaporized unused propane; the preheater is connected with the heating coil and used for heating the circulating water in the heating coil; the superheater is respectively connected with the vaporization gas storage tank, the preheater and the combustion chamber of the gas turbine, water heated by the preheater circulates in a shell pass of the superheater, so that a traditional propane storage tank is omitted, and fuel is directly conveyed by a propane liquefaction tank car. According to the design, not only is the occupied area saved, but also the equipment cost is reduced. And an ignition gas supply system adopting a working gas branch in the original gas turbine configuration is canceled, so that the structure is simplified, and the operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas power plant ignition gas storage device. BACKGROUND

[0002] With the in-depth exploration and development of clean energy around the world, natural gas and its mixed gas with hydrogen (mixed hydrogen gas) are increasingly becoming the preferred fuel in the field of gas power generation due to their high heat output and relatively low carbon emission characteristics. In this field, gas turbines, as the core equipment of gas power generation systems, play a crucial role. However, the current process of starting and igniting gas turbines generally relies on directly diverting working gas, which is used to ignite the combustor inside the gas turbine.

[0003] Although this scheme meets the basic starting needs of the gas turbine to some extent, it also exposes a series of problems that need to be solved:

[0004] Firstly, the temperature of the working gas used in the ignition process lacks adjustability. In actual operation, the gas turbine may need to be ignited and started in low-temperature or high-temperature environments due to different operating conditions. However, the existing ignition scheme cannot flexibly adjust the temperature of the working gas according to actual needs, which undoubtedly limits the adaptability of the gas turbine under more extensive operating conditions.

[0005] Secondly, from the perspective of fuel characteristics, whether it is pure natural gas or natural gas mixed with hydrogen, the flammability of these two fuels will be significantly reduced under low-temperature and small-flow ignition conditions. This not only increases the risk of ignition failure, but also may cause safety hazards such as deflagration due to incomplete combustion of the fuel, thereby threatening the stable operation of the gas turbine. Therefore, the existing ignition scheme still needs to be improved in terms of fuel safety and reliability. SUMMARY

[0006] The purpose of the utility model is to provide a gas power plant ignition gas storage device that can flexibly adjust the temperature of the working gas according to actual needs, while saving land area and reducing equipment cost.

[0007] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a gas power plant ignition gas storage device, comprising:

[0008] A vaporization gas storage tank is provided with a heating coil inside and is connected to the combustion chamber of the gas turbine. The heating coil is used to heat the liquid propane in the vaporization gas storage tank to vaporize it and form low-temperature gas that enters the combustion chamber of the gas turbine;

[0009] A tank car is connected to the vaporization gas storage tank and is used to store liquid propane and recover unused propane that has been vaporized;

[0010] A preheater is connected with the heating coil through a stop valve, and is used for heating the circulating water in the heating coil;

[0011] A superheater is connected with the gasification storage tank, the preheater and the combustion chamber of the gas turbine through stop valves respectively, and the water heated by the preheater circulates in the shell side of the superheater, so that the low-temperature gas is heated again to form high-temperature gas which enters the combustion chamber of the gas turbine.

[0012] As an optimal scheme of the utility model, the preheater is connected with the water inlet end of the heating coil through the first preheater stop valve, the first circulating pump and the first gasification storage tank stop valve, and the water outlet end of the heating coil is connected back to the preheater through the second gasification storage tank stop valve and the second preheater stop valve.

[0013] As an optimal scheme of the utility model, the gasification storage tank is connected with the superheater through the gasification storage tank ball valve and the first superheater ball valve.

[0014] As an optimal scheme of the utility model, the gasification storage tank is connected with the combustion chamber of the gas turbine through the gasification storage tank ball valve and the second superheater ball valve.

[0015] As an optimal scheme of the utility model, the preheater is connected with the water inlet end of the superheater through the third preheater stop valve, the second circulating pump and the first superheater stop valve, and the water outlet end of the superheater is connected back to the preheater through the second superheater stop valve and the fourth preheater stop valve.

[0016] As an optimal scheme of the utility model, the superheater is connected with the combustion chamber of the gas turbine through the third superheater ball valve.

[0017] As an optimal scheme of the utility model, the inlet of the gasification storage tank is connected with the tank car through the liquid inlet stop valve, and the outlet of the gasification storage tank is connected back to the tank car through the liquid outlet stop valve.

[0018] As an optimal scheme of the utility model, the gasification storage tank is provided with the first temperature transmitter for monitoring the temperature change in the storage tank.

[0019] As an optimal scheme of the utility model, the preheater is provided with the electric heater and the second temperature transmitter, the second temperature transmitter is used for monitoring the temperature change in the preheater, and timely feedback signals to the electric heater, so as to timely adjust the power of the electric heater, thereby controlling the hot water temperature in the preheater.

[0020] As an optimal scheme of the utility model, the shell side of the superheater is provided with the air release port for discharging the air in the hot water.

[0021] The present invention achieves the following technical effects by adopting the above technical solutions: the present invention uses propane as ignition fuel, which has good combustibility, and the high-temperature gas and low-temperature gas can meet the ignition requirements under different working conditions.

[0022] To further optimize the design, the traditional propane storage tank was eliminated, and propane liquefaction tank trucks were used to directly transport fuel. This design not only saves floor space but also reduces equipment costs. Simultaneously, the ignition supply system with separate working gas lines in the original gas turbine configuration was eliminated, simplifying the structure and improving operating efficiency. The overall design is more compact, economical, and easier to maintain and operate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the principle and structure of an ignition and gas storage device for a gas-fired power plant.

[0025] Explanation of the numbers in the diagram: 1-1 Inlet shut-off valve, 1-2 Outlet shut-off valve, 1-3 Nitrogen charging port, 1-4 Safety valve, 1-5 Pressure gauge, 1-6 First temperature transmitter, 1-7 Vaporization storage tank ball valve, 1-8 Level gauge, 1-9 First drain port, 1-10 Heating coil, 1-11 Second vaporization storage tank shut-off valve, 1-12 First vaporization storage tank shut-off valve; 2-1 Electric heater, 2-2 Level gauge, 2-3 Second drain port, 2- 4 Second temperature transmitter, 2-5 First preheater shut-off valve, 2-6 First circulating pump, 2-7 Second preheater shut-off valve, 2-8 Fourth preheater shut-off valve, 2-9 Third preheater shut-off valve, 2-10 Second circulating pump; 3-1 First superheater ball valve, 3-2 Second superheater ball valve, 3-3 Second superheater shut-off valve, 3-4 Vent port, 3-5 First superheater shut-off valve, 3-6 Third drain port, 3-7 Third superheater ball valve. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited. The meaning of "several" is one or more, unless otherwise explicitly and specifically limited.

[0029] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Please refer to Figure 1 The embodiment provides a gas-fired power plant ignition gas storage device, comprising:

[0032] The vaporization gas tank 1 is internally provided with a heating coil 1-10 connected with the combustion chamber of the gas engine, and the liquid phase propane in the vaporization gas tank is heated by the heating coil to be vaporized to form low-temperature fuel gas entering the combustion chamber of the gas engine; it is to be noted that the vaporization gas tank in the utility model is provided with a nitrogen filling port 1-3 for nitrogen replacement of the combustible gas remaining in the tank before ignition operation; a safety valve 1-4 is arranged for overpressure protection of the tank, and the safety valve is automatically opened to release the internal pressure of the tank when the pressure of the tank reaches a predetermined value; a pressure gauge 1-5 is arranged for monitoring the internal pressure of the tank; a first temperature transmitter 1-6 is arranged for monitoring the temperature change in the tank; a liquid level gauge 1-8 is arranged for monitoring the liquid level change in the tank; and a first blowdown port 1-9 is arranged for cleaning the impurities remaining in the tank after ignition is completed;

[0033] The preheater 2 is connected with the heating coil 1-10 and is used for heating the circulating water in the heating coil; it is to be noted that the preheater 2 in the utility model is provided with an electric heater 2-1 for heating the feed water in the preheater; a liquid level gauge 2-2 is arranged for monitoring the liquid level change in the preheater; a second blowdown port 2-3 is arranged for cleaning the feed water and impurities remaining in the preheater after ignition is completed; and a second temperature transmitter 2-4 is arranged for monitoring the temperature change in the preheater and timely feeding back a signal to the electric heater 2-1 to timely adjust the power of the electric heater 2-1 so as to control the hot water temperature in the preheater;

[0034] The superheater 3 is connected with the vaporization gas tank, the preheater and the combustion chamber of the gas engine respectively, and the water heated by the preheater is circulated in the shell side of the superheater to heat the low-temperature fuel gas again to form high-temperature fuel gas entering the combustion chamber of the gas engine; it is to be noted that the superheater 3 in the utility model is provided with a venting port 3-4 in the shell side for timely venting the air in the hot water during operation, which is beneficial to the circulation of the hot water; and a third blowdown port 3-6 is arranged for cleaning the feed water and impurities remaining in the superheater after ignition is completed;

[0035] The embodiment further provides a running control method of the gas power plant ignition gas storage device, which comprises the following steps:

[0036] When the gas turbine needs high-temperature gas, the liquid inlet stop valve is opened, and the liquid-phase propane flows into the bottom of the vaporization storage tank from the tank truck; at the same time, the electric heater is started to heat the hot water in the preheater, and when the second temperature transmitter reaches the predetermined value, the first preheater stop valve is opened, and the first circulating pump is started, and then the first vaporization storage tank stop valve is opened, the hot water heated by the preheater flows into the heating coil, and the liquid-phase propane is heated and vaporized through the heating coil; the second vaporization storage tank stop valve and the second preheater stop valve are opened, and the low-temperature hot water participating in the heat exchange flows back to the preheater and is heated again; then the third preheater stop valve is opened, and the second circulating pump is started, and then the first superheater stop valve, the second superheater stop valve and the fourth preheater stop valve are opened, so that the hot water circulates in the shell side of the superheater, the second superheater ball valve is closed, the vaporization storage tank ball valve and the first superheater ball valve are opened, and the vaporized propane gas is heated again by the hot water through the superheater, the third superheater ball valve is opened, and the propane gas heated again enters the combustion chamber of the gas turbine and is ignited and burned.

[0037] When the gas turbine needs low-temperature gas, the first superheater ball valve and the third superheater ball valve are closed, and the second superheater ball valve is opened, and the propane gas vaporized from the vaporization storage tank directly enters the combustion chamber of the gas turbine.

[0038] When the gas turbine is successfully ignited, the vaporization storage tank ball valve and the liquid inlet stop valve are closed, and the liquid outlet stop valve is opened, and the remaining propane is discharged to the tank truck.

[0039] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas power plant ignition gas storage device, characterized by, It comprises: A vaporization gas tank, which is connected with the combustion chamber of the gas engine and has a heating coil inside, and the liquid propane in the vaporization gas tank is heated by the heating coil to form low-temperature gas which enters the combustion chamber of the gas engine; A tank car, which is connected with the vaporization gas tank and is used to store liquid propane and recover unused propane after vaporization; A preheater, which is connected with the heating coil through a stop valve and is used to heat the circulating water in the heating coil; A superheater, which is connected with the vaporization gas tank, the preheater and the combustion chamber of the gas engine through stop valves respectively, and the water heated by the preheater circulates in the shell side of the superheater to make the low-temperature gas heated again to form high-temperature gas which enters the combustion chamber of the gas engine.

2. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The preheater is connected with the water inlet end of the heating coil through a first preheater stop valve, a first circulating pump and a first vaporization gas tank stop valve, and the water outlet end of the heating coil is connected back to the preheater through a second vaporization gas tank stop valve and a second preheater stop valve.

3. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The vaporization gas tank is connected with the superheater through a vaporization gas tank ball valve and a first superheater ball valve.

4. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The vaporization gas tank is connected with the combustion chamber of the gas engine through a vaporization gas tank ball valve and a second superheater ball valve.

5. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The preheater is connected with the water inlet end of the superheater through a third preheater stop valve, a second circulating pump and a first superheater stop valve, and the water outlet end of the superheater is connected back to the preheater through a second superheater stop valve and a fourth preheater stop valve.

6. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The superheater is connected with the combustion chamber of the gas engine through a third superheater ball valve.

7. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The inlet of the vaporization gas tank is connected with the tank car through a liquid inlet stop valve, and the outlet of the vaporization gas tank is connected back to the tank car through a liquid outlet stop valve.

8. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The vaporization gas tank is provided with a first temperature transmitter for monitoring the temperature change in the tank.

9. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The preheater is provided with an electric heater and a second temperature transmitter for monitoring the temperature change in the preheater and feeding back signals to the electric heater in time to adjust the power of the electric heater and control the temperature of the hot water in the preheater.

10. The gas storage device for igniting a gas power plant according to claim 1, characterized in that, The shell side of the superheater is provided with a vent for emptying the air in the hot water.

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