Gas transmission pressure regulating system

Abstract

The application discloses a gas transmission pressure regulating system, relates to the technical field of pipeline gas transmission, and aims to solve the problem of how to improve the energy utilization efficiency of the gas transmission pressure regulating system. The gas transmission pressure regulating system comprises a pressure difference power generation mechanism arranged between an upstream incoming gas side and a downstream gas supply side, which is used for making the pressure of the downstream gas supply side smaller than the pressure of the upstream incoming gas side, and generating electric energy by using the pressure difference between the upstream incoming gas side and the downstream gas supply side; a pressure increasing mechanism arranged between the upstream incoming gas side and the downstream gas supply side, which is used for making the pressure of the downstream gas supply side greater than the pressure of the upstream incoming gas side; and an energy storage mechanism connected between the pressure difference power generation mechanism and the pressure increasing mechanism, which is used for storing the electric energy generated by the pressure difference power generation mechanism and supplying power for the operation of the pressure increasing mechanism.

Description

Technical Field

[0001] This application relates to the field of pipeline gas transmission technology, and in particular to a gas transmission pressure regulating system. Background Technology

[0002] In gas transmission and pressure regulation systems such as natural gas supply stations, there is a need for pressure regulation, such as increasing or decreasing pressure.

[0003] In related technologies, the pressurization of natural gas supply stations can be solved by the front end of the station or by adding a pressurization device on the user side. The depressurization of natural gas supply stations can be achieved by depressurizing valves. However, during the depressurization process of the depressurizing valve, the high-pressure natural gas passes through the narrow channel between the valve core and the valve seat, resulting in increased local resistance. The pressure is converted into gas kinetic energy, turbulence, noise, and heat loss. This process can cause 30% to 40% energy loss, resulting in low energy utilization efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a gas transmission pressure regulating system, which aims to solve the problem of how to improve the energy utilization efficiency of the gas transmission pressure regulating system.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions: This application provides a gas transmission pressure regulating system, including: A differential pressure power generation mechanism is located between the upstream gas supply side and the downstream gas supply side. It is used to make the pressure on the downstream gas supply side less than the pressure on the upstream gas supply side, and to generate electricity by utilizing the pressure difference between the upstream gas supply side and the downstream gas supply side. A pressurizing mechanism is located between the upstream gas supply side and the downstream gas supply side, and is used to make the pressure on the downstream gas supply side greater than the pressure on the upstream gas supply side. An energy storage mechanism is connected between the differential pressure power generation mechanism and the booster mechanism, and is used to store the electrical energy generated by the differential pressure power generation mechanism and supply power for the operation of the booster mechanism.

[0006] The gas transmission pressure regulating system provided in this application embodiment reduces the pressure of the upstream incoming gas through a differential pressure generator before supplying it to the downstream gas supply side. The electrical energy generated by the pressure change is stored in an energy storage device. When there is a high-pressure demand on the downstream gas supply side, the electrical energy in the energy storage device provides power to the booster device, thereby making the pressure on the downstream gas supply side greater than the pressure on the upstream incoming gas side, and then delivering it to the downstream user. In this way, the kinetic energy of the differential pressure generator during pressure reduction is converted into electrical energy, and the electrical energy is stored in the energy storage device for use by the booster device, reducing energy waste and thus improving energy utilization efficiency.

[0007] In some embodiments, the differential pressure power generation mechanism includes an impeller expander and a generator drivenly connected to the impeller expander, the generator being connected to the energy storage mechanism.

[0008] In some embodiments, the boosting mechanism includes a boosting compressor and an electric motor drivenly connected to the boosting compressor, the electric motor being connected to the energy storage mechanism.

[0009] In some embodiments, the pressurization mechanism and the differential pressure power generation mechanism are connected in parallel between the upstream gas supply side and the downstream gas supply side.

[0010] In some embodiments, the differential pressure power generation mechanism further includes a first regulating valve disposed at the outlet end and / or inlet end of the differential pressure power generation mechanism; And / or, the inlet end of the pressurizing mechanism is provided with an adjustment device for adjusting the airflow entry angle of the pressurizing mechanism.

[0011] In some embodiments, the energy storage mechanism includes a flywheel energy storage device.

[0012] In some embodiments, the energy storage mechanism further includes an energy storage interface adapted to be electrically connected to the power grid, the energy storage interface being adapted to access electrical energy through the power grid.

[0013] In some embodiments, the system further includes a first circulation pipeline connected between the outlet of the booster mechanism and the inlet of the differential pressure power generation mechanism, and a second circulation pipeline connected between the outlet of the differential pressure power generation mechanism and the inlet of the booster mechanism. The first circulation pipeline and the second circulation pipeline are opened under the first preset condition.

[0014] In some embodiments, a first pipeline is connected between the upstream gas supply side and the differential pressure power generation mechanism, and a second pipeline is connected between the pressurization mechanism and the downstream gas supply side. It also includes a heat exchanger, which includes a first heat exchange flow path and a second heat exchange flow path connected by heat exchange, wherein the first heat exchange flow path is connected in parallel with the first pipeline and the second heat exchange flow path is connected in parallel with the second pipeline; Under the second preset condition, the gas from the upstream gas supply side enters the differential pressure power generation mechanism through the first pipeline, and the gas in the pressurization mechanism enters the downstream gas supply side through the second pipeline; Under the third preset condition, the gas from the upstream gas supply side enters the differential pressure power generation mechanism through the first heat exchange flow path, and the gas in the pressurization mechanism enters the downstream gas supply side through the second heat exchange flow path.

[0015] In some embodiments, a temperature detector is provided at the outlet end of the first heat exchange flow path, and a second regulating valve is provided at the inlet end of the second heat exchange flow path. The second regulating valve is used to close or reduce the gas flow rate of the second heat exchange flow path when the temperature value detected by the temperature detector is greater than a set threshold.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments 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.

[0018] Figure 1 This is a schematic diagram of a gas pressure regulating system provided in an embodiment of this application; Figure 2 for Figure 1 The diagram shows the front view of the booster compressor in the gas transmission pressure regulating system. Figure 3 for Figure 1 A schematic diagram of a modified structure of the gas transmission pressure regulating system shown; Figure 4 for Figure 1 The diagram shows another modified structure of the gas transmission pressure regulating system.

[0019] Figure Labels 1. Differential pressure power generation mechanism; 11. Impeller expander; 111. First regulating valve; 12. Generator; 13. Second circulation pipeline; 14. First pipeline; 2. Pressure boosting mechanism; 21. Boost compressor; 211. Regulating device; 22. Electric motor; 23. First circulation pipeline; 24. Second pipeline; 3. Energy storage mechanisms; 31. Energy storage interface; 4. Heat exchanger; 41. First heat exchange path; 42. Second heat exchange path; 43. Temperature detector; 44. Second regulating valve; 5. Upstream gas inlet side; 6. Downstream gas supply side. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0025] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0026] Please see Figure 1 , Figure 1 This is a schematic diagram of a gas transmission pressure regulating system provided in an embodiment of this application. The gas transmission pressure regulating system provided in this embodiment includes a differential pressure power generation mechanism 1, a pressure boosting mechanism 2, and an energy storage mechanism 3. The core idea of ​​this embodiment is that when pressure reduction is needed, instead of simply relying on a pressure reducing valve to throttle and dissipate pressure energy, the differential pressure power generation mechanism 1 converts the pressure difference between the upstream and downstream into electrical energy; when pressure boosting is needed, the pressure boosting mechanism 2 increases the downstream pressure; and simultaneously, the energy storage mechanism 3 is provided to store the energy recovered during the pressure reduction process and use it to drive the pressure boosting mechanism 2.

[0027] The function of the differential pressure power generation mechanism 1 is to replace or partially replace the traditional pressure reducing valve during the depressurization gas transmission process, thereby achieving pressure regulation. The differential pressure power generation mechanism 1 is located between the upstream gas supply side 5 and the downstream gas supply side 6, used to ensure that the pressure on the downstream gas supply side 6 is lower than the pressure on the upstream gas supply side 5, and to generate electricity using the pressure difference between the upstream gas supply side 5 and the downstream gas supply side 6. It is understood that the differential pressure power generation mechanism 1 includes, but is not limited to, expander generator sets, screw expanders, turbine expanders, turbo expanders, etc.

[0028] The booster mechanism 2 is located between the upstream gas inlet side 5 and the downstream gas supply side 6, and is used to make the pressure on the downstream gas supply side 6 greater than the pressure on the upstream gas inlet side 5. The booster mechanism 2 includes, but is not limited to, centrifugal compressors, screw compressors, reciprocating compressors, axial compressors, etc.

[0029] The energy storage mechanism 3 is connected between the differential pressure power generation mechanism 1 and the booster mechanism 2, and is used to store the electrical energy generated by the differential pressure power generation mechanism 1 and supply power for the operation of the booster mechanism 2. The energy storage mechanism 3 can have various structural forms. For example, the energy storage mechanism 3 can be battery energy storage, capacitor energy storage, hydraulic energy storage, etc.

[0030] In the embodiments of this application, the rated operating pressure is set as the base pressure. Demands exceeding the base pressure are considered high-pressure demands, and demands below the base pressure are considered low-pressure demands. On the downstream gas supply side 6, i.e., the user side, when there is a low-pressure demand, the gas from the upstream gas supply side 5 passes through the differential pressure generator 1. The energy generated by the pressure change is converted into electrical energy and stored in the energy storage mechanism 3. The gas, after being depressurized by the differential pressure generator 1, is then supplied to the user. When there is a high-pressure demand on the downstream gas supply side 6, the upstream gas supply side 5 uses the electrical energy in the energy storage mechanism 3 to drive the booster mechanism 2, thereby increasing the gas pressure on the upstream gas supply side 5 and delivering it to the downstream user side.

[0031] In the above embodiment, the upstream gas supply side 5 is depressurized by the differential pressure generator 1 and then supplied to the downstream gas supply side 6. The electrical energy generated by the pressure change is stored in the energy storage mechanism 3. When the downstream gas supply side 6 has a high-pressure demand, the electrical energy in the energy storage mechanism 3 provides power to the booster mechanism 2, thereby making the pressure of the downstream gas supply side 6 greater than the pressure of the upstream gas supply side 5, and then delivering it to the downstream user. In this way, the kinetic energy of the depressurization by the differential pressure generator 1 is converted into electrical energy, and the electrical energy is stored in the energy storage mechanism 3 for use by the booster mechanism 2, reducing energy waste and thus improving energy utilization efficiency.

[0032] In some embodiments, the differential pressure power generation mechanism 1 includes an impeller expander 11 and a generator 12 drivenly connected to the impeller expander 11. The generator 12 is connected to an energy storage mechanism 3. After high-pressure natural gas enters the impeller expander 11, the gas drives the impeller to rotate during expansion, and the impeller then drives the generator 12 to generate electricity. With the above configuration, compared with the throttling method of a pressure reducing valve, the ineffective dissipation of energy can be reduced.

[0033] In some embodiments, the booster mechanism 2 includes a booster compressor 21 and an electric motor 22 that is drivenly connected to the booster compressor 21. The electric motor 22 is connected to the energy storage mechanism 3. By connecting the electric motor 22 to the energy storage mechanism 3, the recovered electrical energy can be reused in the booster operation, reducing the need for external power to the booster compressor 21. This structural arrangement can improve the adaptability of the gas transmission system to upstream and downstream pressure fluctuations.

[0034] Furthermore, in some embodiments, gearboxes can be installed between the impeller expander 11 and the generator 12, and between the booster compressor 21 and the electric motor 22, to achieve speed matching and power transmission. For example, when the impeller expander 11 starts up and changes operating conditions, its speed changes drastically. The gearbox can provide a smooth transition, absorb some mechanical shocks and torque vibrations, thus protecting the generator 12 and allowing the system to respond more quickly to load changes.

[0035] In some embodiments, the booster mechanism 2 and the differential pressure generator 1 are connected in parallel between the upstream gas inlet side 5 and the downstream gas supply side 6. This parallel connection allows for branch switching based on operating conditions. Specifically, when the upstream pressure is higher than the required downstream pressure, the differential pressure generator 1 can be activated to reduce the pressure; when the upstream pressure is lower than the required downstream pressure, the booster mechanism 2 can be activated to boost the gas supply. This structural arrangement improves the system's operational flexibility and reduces resistance losses caused by non-operating branches.

[0036] Please see Figure 1 and Figure 2 , Figure 2 for Figure 1 The diagram shows a front view of the booster compressor 21 in the gas transmission pressure regulating system. In embodiments of this application, the differential pressure generator 1 further includes a first regulating valve 111. The first regulating valve 111 can be located at either the inlet or outlet end of the differential pressure generator 1, or it can be located at both the inlet and outlet ends. By adjusting the opening of the first regulating valve 111 according to different pressure requirements of the user, the low-pressure and flow rate requirements of different users can be met.

[0037] In embodiments of this application, the inlet end of the booster mechanism 2 is provided with an adjusting device 211 for adjusting the airflow entry angle of the booster mechanism 2. For example, the adjusting device 211 may be a guide vane rotatably connected to the inlet of the booster compressor 21, such as... Figure 2 As shown by the dashed arrow, the rotation angle of the guide vanes can be adjusted, thereby changing the flow direction of the gas entering the booster compressor 21, and thus changing the gas flow rate and pressure. Furthermore, the frequency of the inverter of the drive motor 22 can be adjusted as needed to change the speed of the booster compressor 21, thereby meeting different high-pressure and flow requirements of the user.

[0038] In some embodiments, the energy storage mechanism 3 includes a flywheel energy storage device. Flywheel energy storage features fast response speed, long cycle life, and suitability for frequent charging and discharging. Pressure, flow rate, and load may fluctuate in the gas transmission station, and the output power of the differential pressure generator 1 and the power consumption of the booster mechanism 2 may differ. By using a flywheel energy storage device, energy can be absorbed or released in a very short time, thereby smoothing out power fluctuations in the system.

[0039] Please continue reading. Figure 1In some embodiments, the energy storage mechanism 3 further includes an energy storage interface 31 suitable for electrical connection to the power grid, which is adapted to access electrical energy through the grid. In actual operation, the voltage drop generation and the boosting power consumption may not be perfectly matched. For example, when the voltage drop is infrequent, the voltage drop is small, or the flow is insufficient, the energy storage mechanism 3 may not be able to meet the operating requirements of the boosting mechanism 2. In this case, by connecting to the grid through the energy storage interface 31 and accessing electrical energy through the grid, the continuous operation of the boosting mechanism 2 can be guaranteed. In addition, the energy storage interface 31 can be used to charge the device during periods of low grid electricity prices to achieve peak shaving and valley filling, and provide backup power.

[0040] Please see Figure 3 , Figure 3 for Figure 1 The diagram shows a modified structure of the gas transmission pressure regulating system. In some embodiments, it further includes a first circulation pipeline 23 connected between the outlet of the booster mechanism 2 and the inlet of the differential pressure generator 1, and a second circulation pipeline 13 connected between the outlet of the differential pressure generator 1 and the inlet of the booster mechanism 2; the first circulation pipeline 23 and the second circulation pipeline 13 are opened under a first preset condition. It should be noted that, in the embodiments of this application, the first preset condition can be during user-side maintenance or shutdown, or when the upstream and downstream pressure fluctuations of the system are large, requiring internal buffering and adjustment. Figure 3 As shown by the bold dashed line, the system's self-circulation function can be achieved through the arrangement of the first circulation pipeline 23 and the second circulation pipeline 13. That is, the upstream gas supply is pressurized by the booster compressor 21, and then sent to the impeller expander 11 to reduce the pressure and generate electricity. The electrical energy is stored in the energy storage device, and the depressurized gas re-enters the booster compressor 21 for circulation. Through the above arrangement, an internal circulation can be formed between the booster mechanism 2 and the differential pressure power generation mechanism 1, thereby reducing the frequency of equipment start-ups and shutdowns, improving the system's stability under low-load conditions, and reducing the impact on upstream and downstream pipelines under sudden changes in operating conditions.

[0041] Furthermore, the parallel arrangement of the self-circulation mechanism 2 and the differential pressure power generation mechanism 1 can improve the system's response speed and enhance the safety of system operation and maintenance; it can also achieve rapid alignment between the user side and the gas supply side, reducing coordination paths and communication costs.

[0042] Please see Figure 4 , Figure 4 for Figure 1The diagram shows another modified structure of the gas transmission pressure regulating system. In this embodiment, a first pipeline 14 connects the upstream gas supply side 5 to the differential pressure power generation mechanism 1, and a second pipeline 24 connects the pressurization mechanism 2 to the downstream gas supply side 6. It also includes a heat exchanger 4, which comprises a first heat exchange flow path 41 and a second heat exchange flow path connected by heat exchange connections. The first heat exchange flow path 41 is connected in parallel with the first pipeline 14, and the second heat exchange flow path is connected in parallel with the second pipeline 24. In this embodiment, gases such as natural gas will experience a cooling effect during depressurization. This temperature reduction may lead to excessively low outlet temperatures for the differential pressure power generation mechanism 1, increasing the risk of frost formation, ice blockage, hydrate formation, or low equipment temperature. Similarly, after the pressurization mechanism 2 compresses the gas, the gas temperature usually rises. In this embodiment, the waste heat from the heat exchanger 4 and the pressurized gas can be used to cool the gas before depressurization, thereby reducing the risk to the differential pressure power generation mechanism 1 caused by the decrease in gas temperature.

[0043] Specifically, under the second preset condition, the gas from the upstream gas supply side 5 enters the differential pressure power generation unit 1 through the first pipeline 14, and the gas in the pressurization unit 2 enters the downstream gas supply side 6 through the second pipeline 24. The second preset condition here refers to the situation where heat exchange is not required, that is, the gas temperature is within the safe threshold range, and it can be directly connected to the downstream through the first pipeline 14 or the second pipeline 24.

[0044] Under the third preset condition, which refers to the temperature condition where the gas to be depressurized needs to be preheated, the gas from the upstream gas side 5 enters the differential pressure generator 1 through the first heat exchange flow path 41, and the gas in the pressurization unit 2 enters the downstream gas supply side 6 through the second heat exchange flow path.

[0045] The above setup enables the recovery and utilization of heat within the system. By connecting ordinary pipelines and heat exchange flow paths in parallel, resistance and heat exchange efficiency can be reduced. Furthermore, this structural design can improve the safety and reliability of the system under conditions of low temperature, large pressure difference, or high pressure ratio.

[0046] Please continue reading. Figure 4In this embodiment, a temperature detector 43 is provided at the outlet end of the first heat exchange flow path 41, and a second regulating valve 44 is provided at the inlet end of the second heat exchange flow path. The second regulating valve 44 is used to close or reduce the gas flow rate of the second heat exchange flow path when the temperature value detected by the temperature detector 43 is greater than a set threshold. The function of the temperature detector 43 is to detect the temperature of the gas after heat exchange and before entering the differential pressure power generation mechanism 1; the function of the second regulating valve 44 is to regulate the gas flow rate in the second heat exchange flow path. When the temperature of the gas in the first heat exchange flow path 41 reaches a preset value, the gas flow rate in the second heat exchange flow path can be reduced; when the temperature of the gas in the first heat exchange flow path 41 exceeds the set value, the second heat exchange flow path can be closed. Through the above settings, the automatic adjustment of the gas temperature in the first heat exchange flow path 41 can be realized, preventing the temperature of the gas entering the differential pressure power generation mechanism 1 from exceeding the set value, thereby improving the automation level of the system's thermal management and the system's energy saving and stability.

[0047] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0048] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A gas transmission pressure regulating system, characterized in that, include: A differential pressure power generation mechanism is located between the upstream gas supply side and the downstream gas supply side. It is used to make the pressure on the downstream gas supply side less than the pressure on the upstream gas supply side, and to generate electricity by utilizing the pressure difference between the upstream gas supply side and the downstream gas supply side. A pressurizing mechanism is located between the upstream gas supply side and the downstream gas supply side, and is used to make the pressure on the downstream gas supply side greater than the pressure on the upstream gas supply side. An energy storage mechanism is connected between the differential pressure power generation mechanism and the booster mechanism, and is used to store the electrical energy generated by the differential pressure power generation mechanism and supply power for the operation of the booster mechanism.

2. The gas pressure regulating system according to claim 1, characterized in that, The differential pressure power generation mechanism includes an impeller expander and a generator that is drivenly connected to the impeller expander. The generator is connected to the energy storage mechanism.

3. The gas pressure regulating system according to claim 1, characterized in that, The boosting mechanism includes a boosting compressor and an electric motor that is drivenly connected to the boosting compressor. The electric motor is connected to the energy storage mechanism.

4. The gas pressure regulating system according to claim 1, characterized in that, The pressurization mechanism and the differential pressure power generation mechanism are connected in parallel between the upstream gas supply side and the downstream gas supply side.

5. The gas pressure regulating system according to claim 1, characterized in that, The differential pressure power generation mechanism also includes a first regulating valve located at the outlet end and / or inlet end of the differential pressure power generation mechanism; And / or, the inlet end of the pressurizing mechanism is provided with an adjustment device for adjusting the airflow entry angle of the pressurizing mechanism.

6. The gas pressure regulating system according to claim 1, characterized in that, The energy storage mechanism includes a flywheel energy storage device.

7. The gas pressure regulating system according to claim 6, characterized in that, The energy storage mechanism also includes an energy storage interface suitable for electrical connection to the power grid, the energy storage interface being suitable for accessing electrical energy through the power grid.

8. The gas pressure regulating system according to any one of claims 1 to 7, characterized in that, It also includes a first circulation pipeline connected between the outlet of the booster mechanism and the inlet of the differential pressure power generation mechanism, and a second circulation pipeline connected between the outlet of the differential pressure power generation mechanism and the inlet of the booster mechanism; The first circulation pipeline and the second circulation pipeline are opened under the first preset condition.

9. The gas pressure regulating system according to any one of claims 1 to 7, characterized in that, A first pipeline connects the upstream gas supply side to the differential pressure power generation mechanism, and a second pipeline connects the pressurization mechanism to the downstream gas supply side. It also includes a heat exchanger, which includes a first heat exchange flow path and a second heat exchange flow path connected by heat exchange, wherein the first heat exchange flow path is connected in parallel with the first pipeline and the second heat exchange flow path is connected in parallel with the second pipeline; Under the second preset condition, the gas from the upstream gas supply side enters the differential pressure power generation mechanism through the first pipeline, and the gas in the pressurization mechanism enters the downstream gas supply side through the second pipeline; Under the third preset condition, the gas from the upstream gas supply side enters the differential pressure power generation mechanism through the first heat exchange flow path, and the gas in the pressurization mechanism enters the downstream gas supply side through the second heat exchange flow path.

10. The gas pressure regulating system according to claim 9, characterized in that, The outlet end of the first heat exchange flow path is equipped with a temperature detector, and the inlet end of the second heat exchange flow path is equipped with a second regulating valve. The second regulating valve is used to close or reduce the gas flow rate of the second heat exchange flow path when the temperature value detected by the temperature detector is greater than a set threshold.

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