Natural gas-hydrogen premixing gas turbine integrated control system

Abstract

The utility model discloses a natural gas-hydrogen premixing gas turbine integrated control system, which solves the problem that hydrogen entering a premixer cannot be timely adjusted in the prior art, and has the beneficial effect that the amount of hydrogen entering a premixing chamber can be timely adjusted. According to the specific scheme, the natural gas-hydrogen premixing gas turbine integrated control system comprises a premixing chamber and a temperature sensor, the temperature sensor is installed on the gas turbine to monitor the temperature in the gas turbine, the premixing chamber communicates with a natural gas inlet pipe and a hydrogen inlet pipe, and the premixing chamber is further provided with a gas outlet pipe; the natural gas inlet pipe is provided with a gas inlet pressure sensor, the hydrogen inlet pipe is provided with a hydrogen pressure sensor, the gas inlet pressure sensor and the hydrogen pressure sensor are connected with a pressure difference controller, the hydrogen inlet pipe is connected with a hydrogen container, a gas inlet pipe of the hydrogen container is provided with a first valve, and the temperature sensor, the first valve and the pressure difference controller are respectively connected with a control unit.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of premixed gas turbine, especially natural gas-hydrogen premixed gas turbine integrated control system. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute prior art.

[0003] With the gradual increase of the application of clean energy, hydrogen is regarded as an important choice to replace traditional fossil fuels. However, the premixed combustion of natural gas and hydrogen requires highly precise control, otherwise it will lead to incomplete combustion, unstable combustion or emission exceeding the standard. The gas turbine of the prior art cannot timely adjust the hydrogen entering the gas turbine, and thus cannot timely control the proportion of natural gas and hydrogen, thereby affecting the efficiency of the gas turbine and increasing the emission of nitrogen oxides of the gas turbine. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model aims to provide a natural gas-hydrogen premixed gas turbine integrated control system, which can accurately control the premixed proportion of natural gas and hydrogen, optimize the combustion efficiency and reduce the emission.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized by the following technical scheme:

[0006] The natural gas-hydrogen premixed gas turbine integrated control system comprises a premixing chamber and a temperature sensor, the temperature sensor is installed on the gas turbine to monitor the temperature in the gas turbine, the premixing chamber is in communication with a natural gas inlet pipe and a hydrogen inlet pipe respectively, the premixing chamber is further provided with an outlet pipe, the natural gas inlet pipe is provided with an inlet pressure sensor, the hydrogen inlet pipe is provided with a hydrogen pressure sensor, the inlet pressure sensor and the hydrogen pressure sensor are connected with a differential pressure controller, the hydrogen inlet pipe is connected with a hydrogen container, the inlet pipe of the hydrogen container is provided with a first valve, the temperature sensor, the first valve and the differential pressure controller are connected with a control unit respectively.

[0007] The natural gas-hydrogen premixed gas turbine integrated control system as described above further comprises a fuel sampler arranged on the outlet pipe, the fuel sampler is connected with a fuel gas analyzer, and the fuel gas analyzer is connected with the control unit.

[0008] The natural gas-hydrogen premixed gas turbine integrated control system as described above, the hydrogen inlet pipe is provided with a second valve, and the second valve is connected with the control unit.

[0009] The natural gas-hydrogen premixed gas turbine integrated control system as claimed in claim 1, wherein the longitudinal section of the premixing chamber is elliptical, the natural gas inlet pipe and the outlet pipe are located in the same plane, and the natural gas inlet pipe and the outlet pipe are arranged along the long axis direction of the premixing chamber.

[0010] The natural gas-hydrogen premixed gas turbine integrated control system as claimed in claim 1, wherein the hydrogen inlet pipe is arranged along the short axis direction of the premixing chamber.

[0011] The natural gas-hydrogen premixed gas turbine integrated control system as claimed in claim 1, wherein the premixing chamber is supported by a support frame, the support frame comprises a support base, a plurality of inclined frames are arranged on the top of the support base, support rings are arranged at the top ends of the plurality of inclined frames, the support rings are elliptical in shape, steps are arranged outside the premixing chamber, and the support rings and the steps are matched to support the premixing chamber, so as to ensure the height of the premixing chamber and facilitate the stability of the premixing chamber.

[0012] The natural gas-hydrogen premixed gas turbine integrated control system as claimed in claim 1, wherein the support rings and the premixing chamber are provided with extension plates, and fasteners are used to connect the extension plates of the support rings and the premixing chamber.

[0013] The natural gas-hydrogen premixed gas turbine integrated control system as claimed in claim 1, wherein the outlet pipe is provided with an opening, the fuel sampler comprises a sampling pipe, the sampling pipe is connected to the fuel gas analyzer through a pipeline, the inner diameter of the sampling pipe is larger than the inner diameter of the pipeline, and one end of the sampling pipe is T-shaped so that the sampling pipe is inserted into the opening of the outlet pipe.

[0014] The natural gas-hydrogen premixed gas turbine integrated control system as claimed in claim 1, wherein a sealing ring is arranged around the sampling pipe to seal the opening, so as to ensure the sealing property of the outlet pipe.

[0015] The natural gas-hydrogen premixed gas turbine integrated control system as claimed in claim 1, wherein the temperature sensor is a thermocouple, which is used to obtain the temperature inside the gas turbine.

[0016] The natural gas-hydrogen premixed gas turbine integrated control system as claimed in claim 1 has the following beneficial effects:

[0017] 1) In the natural gas-hydrogen premixed gas turbine integrated control system, the natural gas inlet pipe is provided with an inlet pressure sensor, and the hydrogen inlet pipe is provided with a hydrogen pressure sensor, the two pressure sensors are connected to a differential pressure controller respectively, so as to transmit the detected pressure signals to the differential pressure controller, when the differential pressure controller detects that the hydrogen inlet pressure is low, a signal is sent to the control unit, the control unit controls the first valve between the hydrogen source and the hydrogen container, so as to increase the opening degree of the first valve to increase the hydrogen inlet pressure, and vice versa, so as to reduce the opening degree of the first valve to reduce the hydrogen inlet pressure, the overall combustion process control is indirectly realized through multi-sensor data acquisition and feedback adjustment, the combustion efficiency is improved, and the energy consumption is reduced.

[0018] 2) The utility model discloses a fuel sampler is provided, fuel sampler is connected with fuel gas analyzer, and fuel sampler gathers mixed fuel and sends signal to fuel gas analyzer, after being analyzed through fuel gas analyzer, if the hydrogen proportion is smaller, then signal will be sent to control unit, and the second valve between hydrogen container and premixing chamber is controlled to the control unit, and the opening of second valve is opened to increase the hydrogen proportion in mixed fuel, in the contrary, the opening of second valve is reduced to reduce the hydrogen proportion in mixed fuel.

[0019] 3) The utility model discloses that gas turbine is provided with temperature sensor, and temperature sensor real -time monitoring the temperature in gas turbine, if the temperature in gas turbine is too high, then signal will be sent to control unit, and then the opening of first valve and second valve is reduced by control unit, in the contrary, the opening of first valve and second valve is increased.

[0020] 4) The utility model discloses that premixing chamber is oval, and natural gas inlet pipe, outlet pipe all are along the long axis direction of premixing chamber and set up, and hydrogen inlet pipe is along the short axis direction of premixing chamber and sets up, to effectively guarantee that natural gas and hydrogen enter premixing chamber. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification of this utility model form a part of the disclosure, serve to further provide an understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof serve to explain the utility model, and do not constitute improper limitation on the utility model.

[0022] Figure 1 It is the schematic diagram of natural gas-hydrogen premixing gas turbine integrated control system according to one or more embodiments of the utility model.

[0023] Figure 2 It is the schematic diagram of support frame in natural gas-hydrogen premixing gas turbine integrated control system according to one or more embodiments of the utility model.

[0024] Figure 3 It is the schematic diagram of fuel sampler in natural gas-hydrogen premixing gas turbine integrated control system according to one or more embodiments of the utility model.

[0025] In the drawing: exaggeratedly intercoupling interval or size for showing the position of each part, and the schematic diagram is only illustrative.

[0026] Wherein: 1, main air inlet pipe; 2, air inlet pressure sensor; 3, natural gas inlet pipe; 4, premixing chamber; 5, hydrogen inlet pipe; 6, gas outlet pipe; 7, fuel sampler; 8, fuel gas analyzer; 9, hydrogen pressure sensor; 10, hydrogen inlet pipe; 11, hydrogen container; 12, first valve; 13, differential pressure controller; 14, second valve; 15, gas turbine; 16, temperature sensor; 17, control unit; 18, support; 19, inclined frame; 20, support ring; 21, sealing ring; 22, sampling tube. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed description is illustrative only and is intended to further describe the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0028] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise explicitly stated by the present application, the singular form is intended to include the plural form, and in addition, it should be understood that when the terms "comprise" and / or "include" are used in the present specification, they mean the presence of a feature, step, operation, device, component and / or combination thereof;

[0029] As introduced in the background, the problem in the prior art, in order to solve the above technical problems, the present application provides a natural gas-hydrogen premixed gas turbine integrated control system.

[0030] Embodiment one

[0031] In a typical embodiment of the present application, referring to Figure 1 As shown in the figure, the natural gas-hydrogen premixed gas turbine integrated control system comprises a premixing chamber 4 and a temperature sensor 16, the temperature sensor 16 is installed on the gas turbine to monitor the temperature in the gas turbine, the premixing chamber 4 is in communication with the natural gas inlet pipe 1 and the hydrogen inlet pipe 10 through the natural gas inlet 3 and the hydrogen inlet 5 respectively, the premixing chamber 4 is also provided with a gas outlet pipe 6, the natural gas inlet pipe 1 is provided with an air inlet pressure sensor 2, the hydrogen inlet pipe 10 is provided with a hydrogen pressure sensor 9, the air inlet pressure sensor 2 and the hydrogen pressure sensor 9 are connected with the differential pressure controller 13, the hydrogen inlet pipe 10 is connected with the hydrogen container 11, the hydrogen container 11 is connected with the hydrogen gas source through the gas source inlet pipe, the gas source inlet pipe is provided with a first valve 12, the temperature sensor 16, the first valve 12 and the differential pressure controller 13 are connected with the control unit respectively.

[0032] It is easily understood that the control system further comprises a fuel sampler 7 arranged in the outlet pipe 6, the fuel sampler 7 is connected with a fuel gas analyzer 8, and the fuel gas analyzer 8 is connected with the control unit.

[0033] The hydrogen inlet pipe 10 is provided with a second valve 14, and the second valve is connected with the control unit.

[0034] In the embodiment, the first valve 12 and the second valve 14 are both electromagnetic valves, and the control unit 17 is a conventional industrial computer. The industrial computer has a display, and can display the data detected by the sensors, so as to facilitate observation. The industrial computer is connected with an alarm, and when the pressure detected by the pressure sensor fed back to the differential pressure controller is smaller, the control unit controls the alarm to alarm. The alarm can be a buzzer.

[0035] It is understood that the longitudinal section of the premixing chamber 4 is elliptical, the natural gas inlet pipe 1 and the outlet pipe 6 are arranged in the same plane, and the natural gas inlet pipe 1 and the outlet pipe 6 are arranged along the long axis direction of the premixing chamber 4, and the hydrogen inlet pipe 10 is arranged along the short axis direction of the premixing chamber 4, so that the hydrogen entering the premixing chamber enters the premixing chamber 4 in a direction perpendicular to the natural gas, which is beneficial to the mixing of the natural gas and the hydrogen in the premixing chamber.

[0036] It should be noted that the premixing chamber is supported by a support frame. As shown in Figure 2 , the support frame comprises a support base 18, a plurality of inclined frames 19 are arranged at the top of the support base 18, and a support ring 20 is arranged at the top end of the plurality of inclined frames 19. The support ring 20 is elliptical in shape. A step is arranged outside the premixing chamber 4. The support ring cooperates with the step to support the premixing chamber, so as to ensure the height of the premixing chamber and facilitate the stability of the premixing chamber.

[0037] Moreover, in consideration of the stability of the premixing chamber, the support ring and the premixing chamber are both provided with a plurality of extension plates. The adjacent two extension plates in the support ring are arranged at an interval distance. Fasteners such as bolts and nuts are used to connect the extension plates of the support ring and the premixing chamber.

[0038] It is understood that the outlet pipe is provided with an opening, and the fuel sampler 7 comprises a sampling pipe 22. The sampling pipe 22 is connected with the fuel gas analyzer 8 through a pipeline. The inner diameter of the sampling pipe 22 is greater than the inner diameter of the pipeline. One end of the sampling pipe is T-shaped so that the sampling pipe can be inserted into the opening of the outlet pipe. The sampling pipe is a flexible pipe so as to be easily inserted into the opening of the outlet pipe. The protruding side of the sampling pipe enters the inside of the outlet pipe through the opening and is attached to the outlet pipe. A sealing ring is arranged around the sampling pipe to seal the opening. The sealing ring has a set thickness. The thickness of the sealing ring 21 can be greater than the wall thickness of the outlet pipe. The sealing ring 21 can be a rubber sealing ring. The sealing ring is arranged around the sampling pipe to ensure the sealing of the outlet pipe.

[0039] In addition, it is understood that the fuel gas analyzer 8 adopts a conventional fuel gas analyzer.

[0040] Specifically, the temperature sensor is a thermocouple for obtaining the temperature inside the gas turbine, and if the temperature inside the gas turbine is too high, a signal is sent to the control unit, and then the control unit reduces the opening degree of the first valve and the second valve; otherwise, the opening degree of the first valve and the second valve is increased.

[0041] The system provided by the application sets an intake pressure sensor on the natural gas intake pipe and a hydrogen pressure sensor on the hydrogen intake pipe, and the two pressure sensors are connected with a differential pressure controller respectively to transmit the detected pressure signals to the differential pressure controller, so that when the differential pressure controller detects that the hydrogen intake pressure is low, a signal is sent to the control unit, the control unit controls the first valve between the hydrogen source and the hydrogen container to increase the opening degree of the first valve to increase the hydrogen intake pressure; otherwise, the opening degree of the first valve is reduced to reduce the hydrogen intake pressure.

[0042] The above only describes the preferred embodiments of the application and is not used to limit the application, and for those skilled in the art, the application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. Natural gas-hydrogen premixed gas turbine integrated control system, characterized in that: It includes a premixing chamber and a temperature sensor. The temperature sensor is installed on the gas turbine to monitor the temperature inside the gas turbine. The premixing chamber is connected to the natural gas inlet pipe and the hydrogen inlet pipe respectively. The premixing chamber is also provided with an outlet pipe. The natural gas inlet pipe is provided with an intake pressure sensor, and the hydrogen inlet pipe is provided with a hydrogen pressure sensor. The intake pressure sensor and the hydrogen pressure sensor are connected to the pressure difference controller. The hydrogen inlet pipe is connected to the hydrogen container. The inlet pipe of the hydrogen container is provided with a first valve. The temperature sensor, the first valve, and the pressure difference controller are respectively connected to the control unit.

2. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 1, characterized in that: It also includes a fuel sampler arranged on the gas outlet pipe, the fuel sampler is connected to the fuel gas analyzer, and the fuel gas analyzer is connected to the control unit.

3. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 1, characterized in that: The hydrogen inlet pipe is provided with a second valve, and the second valve is connected to the control unit.

4. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 1, characterized in that: The longitudinal cross-section of the premixing chamber is elliptical, the natural gas inlet pipe and the outlet pipe are located in the same plane, and both the natural gas inlet pipe and the outlet pipe are arranged along the long axis direction of the premixing chamber.

5. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 1, characterized in that: The hydrogen inlet pipe is arranged along the short axis direction of the premixing chamber.

6. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 1, characterized in that: The premixing chamber is supported by a support frame, which includes a support, a plurality of oblique frames are arranged on the top of the support, a support ring is arranged on the top of the plurality of oblique frames, and the shape of the support ring is elliptical. A step is arranged outside the premixing chamber, and the support ring and the step cooperate to support the premixing chamber.

7. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 6, characterized in that: The support ring and the premixing chamber are both provided with extension plates, and fasteners connect the support ring and the extension plates of the premixing chamber.

8. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 2, characterized in that: The outlet pipe is provided with an opening, and the fuel sampler includes a sampling tube, which is connected to the fuel gas analyzer through a pipeline. The inner diameter of the sampling tube is larger than the inner diameter of the pipeline, and one end of the sampling tube is T-shaped so that the sampling tube can be inserted into the outlet pipe opening.

9. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 8, characterized in that: A sealing ring is provided in the circumferential direction of the sampling tube to seal the opening.

10. The natural gas-hydrogen premixed gas turbine integrated control system according to claim 1, characterized in that: The temperature sensor is a thermocouple.

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