Gas pressurization system, method, electronic device and readable storage medium for hydrogen refueling station

Abstract

The present invention provides a gas pressurization system, method, electronic device and readable storage medium for a hydrogen refueling station. The system includes a diaphragm compressor, a reflux pipeline, a buffer tank and a vent pipeline. The air inlet and air outlet of the diaphragm compressor are respectively connected to the air inlet pipeline and the exhaust pipeline, and a total exhaust pneumatic valve is provided on the exhaust pipeline; the two ends of the reflux pipeline are respectively connected to the exhaust pipeline and the air inlet pipeline, and a reflux pneumatic valve is provided on the reflux pipeline; the buffer tank is connected to the air inlet pipeline and the reflux pipeline through the first buffer pipeline and the second buffer pipeline, and a front tank air inlet pneumatic valve and a rear tank air inlet pneumatic valve are provided on the air inlet pipeline, a buffer tank pneumatic valve is provided on the first buffer pipeline, and a buffer tank air inlet pneumatic valve is provided on the second buffer pipeline; the air inlet pipeline, the exhaust pipeline, the buffer tank and the reflux pipeline are connected to the vent pipeline, and a vent pneumatic valve is provided on the vent pipeline. The present invention can stabilize the diaphragm head pressure of the diaphragm compressor and extend the service life of the diaphragm.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen refueling stations, and in particular to a gas pressurization system, method, electronic equipment and readable storage medium for hydrogen refueling stations. Background Art

[0002] Hydrogen is becoming the focus of energy innovation and re-industrialization in major developed economies and countries in the world due to its wide sources, high energy efficiency, renewability, and zero pollution from combustion products. In recent years, the United States, Japan, China, South Korea, the European Union, and other countries have formulated hydrogen energy development strategies, vigorously developed hydrogen vehicles, and actively promoted the construction of hydrogen energy infrastructure such as hydrogen refueling stations.

[0003] Hydrogen refueling stations are infrastructure that provide energy replenishment for hydrogen fuel cells and other equipment. They are a prerequisite for the promotion and application of hydrogen fuel cell vehicles and the accelerated development of the hydrogen energy industry. Hydrogen refueling stations are divided into off-site hydrogen supply stations and on-site hydrogen production stations. Off-site hydrogen supply stations are further divided into high-pressure gas hydrogen refueling stations and liquid hydrogen refueling stations. At present, my country mainly uses high-pressure gas hydrogen refueling stations.

[0004] There are two main types of compressors used in hydrogen refueling stations: liquid-driven and diaphragm. Diaphragm compressors have the advantages of good sealing performance, fast pressurization speed, and high hydrogen purity, and occupy 70% of the market share. However, due to the limited service life of the diaphragm, diaphragm compressors cannot be started and stopped frequently. Therefore, how to reduce the start and stop frequency of diaphragm compressors is the focus of current research.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome at least some of the shortcomings of the prior art and provide a gas boosting system for a hydrogen refueling station. By connecting a return line between the exhaust line and the intake line of the diaphragm compressor and arranging a buffer tank on the bypass between the return line and the intake line, the diaphragm head pressure of the diaphragm compressor can be stabilized, sudden changes in pressure levels can be avoided, and the service life of the diaphragm of the diaphragm compressor can be extended.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A gas pressurization system for a hydrogen refueling station, comprising:

[0009] A diaphragm compressor, wherein the air inlet and the air outlet of the diaphragm compressor are respectively connected to an air inlet pipeline and an air outlet pipeline, and a total exhaust pneumatic valve is provided on the exhaust pipeline;

[0010] A reflux pipeline, the two ends of which are respectively connected to the exhaust pipeline and the intake pipeline, and a reflux pneumatic valve is provided on the reflux pipeline;

[0011] a buffer tank, connected to the intake pipeline and the return pipeline respectively through a first buffer pipeline and a second buffer pipeline, the first buffer pipeline being connected to the downstream of a connection point between the return pipeline and the intake pipeline, the second buffer pipeline being connected to the upstream of the return pneumatic valve, a pre-tank intake pneumatic valve being provided on the intake pipeline at a position upstream of a connection point between the return pipeline and the intake pipeline, a post-tank intake pneumatic valve being provided on the intake pipeline at a position downstream of a connection point between the first buffer pipeline and the intake pipeline, a buffer tank pneumatic valve being provided on the first buffer pipeline, and a buffer tank intake pneumatic valve being provided on the second buffer pipeline;

[0012] A vent pipeline, the air intake pipeline, the exhaust pipeline, the buffer tank and the return pipeline are connected to the vent pipeline, and a vent pneumatic valve is provided on the vent pipeline.

[0013] In some embodiments, the return pneumatic valve is a return pneumatic back-pressure valve.

[0014] In some embodiments, a cooler is provided on the exhaust pipe.

[0015] In some embodiments, the oil pressure end of the diaphragm compressor is provided with an oil pressure regulating valve for controlling the pressure in front of the oil pressure diaphragm.

[0016] The present invention also provides a gas pressurization method for a hydrogen refueling station, which is applied to the gas pressurization system for a hydrogen refueling station, comprising:

[0017] In the hydrogenation mode, the reflux pneumatic valve and the vent pneumatic valve are controlled to be closed, and the front tank air intake pneumatic valve, the rear tank air intake pneumatic valve, the buffer tank pneumatic valve and the total exhaust pneumatic valve are controlled to be opened, and the hydrogen from the intake pipeline is pressurized by the diaphragm compressor and then discharged through the exhaust pipeline;

[0018] In the automatic circulation mode of hydrogenation intermittently, the front-tank air intake pneumatic valve, the main exhaust pneumatic valve and the vent pneumatic valve are controlled to be closed, and the reflux pneumatic valve, the buffer tank pneumatic valve and the rear-tank air intake pneumatic valve are controlled to be opened. The hydrogen in the buffer tank is pressurized by the diaphragm compressor and then enters the air intake pipeline through the reflux pipeline, thereby realizing the automatic circulation of the diaphragm compressor.

[0019] In some embodiments, when the duration of the automatic circulation mode exceeds a preset time threshold, the buffer tank pneumatic valve and the return pneumatic valve are controlled to be closed, and the buffer tank intake pneumatic valve is controlled to be opened, while the exhaust pressure of the exhaust line and the intake pressure of the intake line are monitored; and

[0020] The opening and closing of the buffer tank air intake pneumatic valve and the air exhaust pneumatic valve are controlled according to the exhaust pressure and the intake pressure.

[0021] In some embodiments, the step of controlling the opening and closing of the buffer tank intake pneumatic valve and the exhaust pneumatic valve according to the exhaust pressure and the intake pressure includes:

[0022] When it is determined that the exhaust pressure and the intake pressure meet a first preset condition, controlling the buffer tank intake pneumatic valve to close, and controlling the exhaust pneumatic valve to open;

[0023] When it is determined that the exhaust pressure and the intake pressure are reduced to meet a second preset condition, the pneumatic vent valve is controlled to be closed, so that the diaphragm compressor runs at no load.

[0024] In some embodiments, when the diaphragm compressor is in operation, the oil pressure front pressure of the diaphragm is controlled by controlling the opening of the oil pressure regulating valve.

[0025] The present invention also provides an electronic device, comprising:

[0026] processor;

[0027] A memory, wherein a computer program configured to be executed by the processor is stored in the memory, and the processor implements the gas pressurization method for a hydrogen refueling station as described above when executing the computer program.

[0028] The present invention also provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the gas pressurization method for a hydrogen refueling station is implemented.

[0029] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0030] (1) The gas boosting system for a hydrogen refueling station provided by the present invention can stabilize the diaphragm head pressure of the diaphragm compressor, avoid sudden changes in pressure levels, and extend the service life of the diaphragm of the diaphragm compressor by connecting a return line between the exhaust line and the intake line of the diaphragm compressor and providing a buffer tank on the bypass between the return line and the intake line.

[0031] (2) The gas boosting system for hydrogen refueling stations provided by the present invention configures a buffer tank pneumatic valve and a buffer tank air intake pneumatic valve for the buffer tank, and controls the opening and closing of the buffer tank pneumatic valve and the buffer tank air intake pneumatic valve so that the diaphragm compressor can be switched to a no-load operation mode, thereby preventing long-term load cycles from affecting the life of the diaphragm. Moreover, before entering the no-load mode, the hydrogen in the high-pressure hydrogen pipeline will enter the buffer tank for storage and be reused for the next startup, rather than being directly emptied, which can effectively save the amount of hydrogen.

[0032] (3) The gas boosting system for hydrogen refueling stations provided by the present invention is provided with an oil pressure regulating valve at the oil pressure end of the diaphragm compressor, which can automatically adjust the oil pressure to match the exhaust pressure according to the mode, which is convenient and fast, and can further ensure that the diaphragm is not impacted by a large pressure difference, thereby increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0034] Figure 1 is a partial structural schematic diagram of a gas pressurization system for a hydrogen refueling station provided according to an exemplary embodiment of the present invention;

[0035] Figure 2 is a schematic flow diagram of a gas pressurization method for a hydrogen refueling station provided according to an exemplary embodiment of the present invention;

[0036] Figure 3 is a schematic structural diagram of an electronic device provided according to an exemplary embodiment of the present invention.

[0037] In the figure: 100, a gas pressurizing system for a hydrogen refueling station;

[0038] 110. Diaphragm compressor; 111. Oil pressure regulating valve;

[0039] 120. Air intake pipeline; 121. Air intake pneumatic valve before the tank; 122. Air intake pneumatic valve after the tank; 123. Air intake safety valve after the tank; 124. Air intake filter after the tank;

[0040] 130. Exhaust pipeline; 131. General exhaust pneumatic valve; 132. Cooler; 133. General exhaust check valve; 134. Exhaust pipe safety valve;

[0041] 140. Return pipeline; 141. Return pneumatic back pressure valve;

[0042] 150, buffer tank; 151, first buffer pipeline; 152, second buffer pipeline; 153, buffer tank pneumatic valve; 154, buffer tank air inlet pneumatic valve; 155, buffer tank safety valve;

[0043] 160, vent pipeline; 161, vent pneumatic valve; 162, manual vent valve;

[0044] 170. Hydrogen source;

[0045] 180. replacement gas source; 181. replacement gas inlet valve; 182. replacement gas one-way valve;

[0046] 300. Electronic device; 301. Processor; 302. Memory; 303. Bus; 304. Communication interface.

[0047] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. 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, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] As introduced in the background technology of this article, due to the service life of the diaphragm, the diaphragm compressor cannot be started and stopped frequently. Therefore, it is necessary to configure an automatic circulation system for the diaphragm compressor to reduce the number of starts and stops of the diaphragm compressor. However, the diaphragm compressors with automatic circulation systems currently have pipelines directly connecting the inlet and outlet of the diaphragm compressor, which causes sudden changes in the inlet and outlet pressure levels, which can easily lead to diaphragm rupture and damage to the inlet seal. In addition, for automatic circulation diaphragm compressors that do not have the function of automatically switching to no-load mode, long-term load operation in automatic circulation mode affects the life of the diaphragm, and the energy consumption is high, and the usage scenarios are limited.

[0052] Based on this, the present invention provides a gas boosting system 100 for a hydrogen refueling station, which can stabilize the diaphragm head pressure of the diaphragm compressor 110 by connecting the return line 140 between the exhaust line 130 and the intake line 120 of the diaphragm compressor 110, and arranging a buffer tank 150 on the bypass between the return line 140 and the intake line 120, thereby avoiding sudden changes in the inlet and outlet pressure levels of the diaphragm compressor 110 and extending the service life of the diaphragm of the diaphragm compressor 110. In addition, the present invention also configures a buffer tank pneumatic valve 153 and a buffer tank air intake pneumatic valve 154 for the buffer tank 150, and the diaphragm compressor 110 can be switched to a no-load operation mode by controlling the opening and closing of the buffer tank pneumatic valve 153 and the buffer tank air intake pneumatic valve 154, thereby preventing long-term load circulation from affecting the service life of the diaphragm.

[0053] Specifically, the gas pressurizing system 100 for a hydrogen refueling station includes a diaphragm compressor 110 , a return line 140 , a buffer tank 150 , and a venting line 160 .

[0054] The air inlet and the air outlet of the diaphragm compressor 110 are connected to the air inlet pipeline 120 and the air outlet pipeline 130 respectively. The inlet of the air inlet pipeline 120 is connected to the hydrogen source 170. The exhaust pipeline 130 is provided with a total exhaust pneumatic valve 131 for controlling the on-off of the exhaust pipeline 130. The diaphragm compressor 110 is provided with an oil pressure regulating valve 111 for controlling the pressure before the oil pressure membrane. Pressure transmitters are provided on both the air inlet pipeline 120 and the exhaust pipeline 130 for detecting the air inlet pressure and the exhaust pressure. The hydrogen source 170 is, for example, a hydrogen storage system including a storage tank.

[0055] In some embodiments, a total exhaust check valve 133 is disposed on the exhaust pipeline 130 , and the total exhaust check valve 133 is disposed at the air inlet of the total exhaust pneumatic valve 131 to prevent gas backflow.

[0056] In some embodiments, the air intake pipeline 120 is also connected to a replacement gas source 180, and a replacement gas intake valve 181 and a replacement gas check valve 182 are provided on the connection pipeline between the air intake pipeline 120 and the replacement gas source 180. The replacement gas source 180 is, for example, a nitrogen source, which is used to provide purge gas for the gas boosting system 100 for a hydrogen refueling station.

[0057] The two ends of the reflux pipeline 140 are connected to the exhaust pipeline 130 and the intake pipeline 120 respectively, and a reflux pneumatic valve is provided on the reflux pipeline 140 to control the on-off of the reflux gas from the reflux pipeline 140 to the intake pipeline 120. Furthermore, the reflux pneumatic valve is a reflux pneumatic back pressure valve 141, which enables hydrogen to achieve throttling and pressure reduction. During the reflux cycle, the matching membrane head inlet pressure (i.e., valve outlet pressure) can be adjusted according to the membrane head outlet pressure (i.e., valve inlet pressure) unchanged, to achieve automatic reflux cycle, overcome the sudden change of pressure level, and extend the service life of the membrane.

[0058] The buffer tank 150 is connected to the intake pipeline 120 and the return pipeline 140 through a first buffer pipeline 151 and a second buffer pipeline 152, respectively. The first buffer pipeline 151 is connected to the downstream of the connection point between the return pipeline 140 and the intake pipeline 120, and the second buffer pipeline 152 is connected to the upstream of the return pneumatic valve. A pre-tank intake pneumatic valve 121 is provided on the intake pipeline 120 at an upstream position of the connection point between the return pipeline 140 and the intake pipeline 120, and a post-tank intake pneumatic valve 122 is provided on the intake pipeline 120 at a downstream position of the connection point between the first buffer pipeline 151 and the intake pipeline 120. The first buffer pipeline 151 is provided with a buffer tank pneumatic valve 153 for controlling the flow of gas between the buffer tank 150 and the intake pipeline 120 . The second buffer pipeline 152 is provided with a buffer tank intake pneumatic valve 154 for controlling the flow of gas reflux from the return pipeline 140 to the buffer tank 150 .

[0059] Optionally, the buffer tank 150 is also configured with sensors such as a temperature changer and a pressure transmitter for detecting the gas temperature and gas pressure in the buffer tank 150 .

[0060] The intake pipeline 120, the exhaust pipeline 130, the buffer tank 150 and the return pipeline 140 are all connected to the vent pipeline 160. The vent pipeline 160 is provided with a vent pneumatic valve 161, and a total exhaust check valve 133 is provided downstream of the vent pneumatic valve 161 to allow gas to flow from the vent pneumatic valve 161 to the vent pipeline 160 in one direction to prevent gas from flowing back.

[0061] A post-tank intake safety valve 123 is provided on the connection pipeline between the intake pipeline 120 and the vent pipeline 160. When the gas pressure in the intake pipeline 120 exceeds the standard according to the data detected by the pressure transmitter, the post-tank intake safety valve 123 can be controlled to open and release the gas pressure to ensure system safety. A buffer tank safety valve 155 is provided on the connection pipeline between the buffer tank 150 and the vent pipeline 160. When the gas pressure in the buffer tank 150 exceeds the standard according to the data detected by the pressure transmitter, the buffer tank safety valve 155 can be controlled to open and release the gas pressure to ensure system safety.

[0062] In order to prevent safety problems caused by electronic failure of the pneumatic vent valve 161 , the present invention further configures a manual vent valve 162 for the vent pipeline 160 , and the manual vent valve 162 is arranged in parallel with the pneumatic vent valve 161 .

[0063] In some embodiments, the gas boosting system 100 for a hydrogen refueling station further includes a post-tank air intake filter 124, which is disposed on the air intake pipeline 120 and is used to filter the gas entering the diaphragm compressor 110 to improve gas purity.

[0064] In some embodiments, the gas boosting system 100 for a hydrogen refueling station further includes a cooler 132 for reducing the temperature of hydrogen. The cooler 132 is disposed on the exhaust pipe 130 , and temperature transmitters are disposed upstream and downstream of the cooler 132 for detecting the temperature of the gas before and after passing through the cooler 132 .

[0065] It should be noted that the gas pressurizing system 100 for hydrogen refueling station includes a control unit, which can realize automatic control of each pneumatic valve in the above pipeline. The control unit adopts a PLC control method, for example.

[0066] The present invention can achieve seamless switching of the diaphragm compressor 110 among the hydrogenation mode, the self-circulation mode and the no-load mode by controlling the above-mentioned multiple pneumatic valves, thereby realizing automatic adjustment and switching according to the hydrogenation frequency.

[0067] Figure 2 A flow chart of a gas pressurization method 200 for a hydrogen refueling station according to an exemplary embodiment of the present invention is shown.

[0068] like Figure 2 As shown, the execution of the gas pressurization method 200 for hydrogen refueling stations includes the following steps, each of which is a scenario that may occur during the actual operation of the gas pressurization system 100 for hydrogen refueling stations.

[0069] S210, in the hydrogenation mode, the reflux pneumatic valve and the vent pneumatic valve are controlled to be closed, and the front tank air intake pneumatic valve, the rear tank air intake pneumatic valve, the buffer tank pneumatic valve and the total exhaust pneumatic valve are controlled to be opened, and the hydrogen from the intake pipeline is pressurized by the diaphragm compressor and then discharged through the exhaust pipeline;

[0070] S220, in the automatic circulation mode of hydrogenation intermittent, the front air intake pneumatic valve, the main exhaust pneumatic valve and the vent pneumatic valve are controlled to be closed, and the reflux pneumatic valve, the buffer tank pneumatic valve and the rear air intake pneumatic valve are controlled to be opened, the hydrogen in the buffer tank is pressurized by the diaphragm compressor and then enters the air intake pipeline through the reflux pipeline, so as to realize the automatic circulation of the diaphragm compressor;

[0071] S230. When the duration of the hydrogenation intermittent mode exceeds a preset time threshold, the no-load mode is entered, the buffer tank pneumatic valve and the reflux pneumatic valve are controlled to be closed, and the buffer tank intake pneumatic valve is controlled to be opened. Meanwhile, the exhaust pressure of the exhaust pipeline and the intake pressure of the intake pipeline are monitored, and the opening and closing of the buffer tank intake pneumatic valve and the vent pneumatic valve are controlled according to the exhaust pressure and the intake pressure.

[0072] It should be understood that the steps shown in the hydrogen station gas pressurization method 200 are not exclusive, and the hydrogen station gas pressurization method 200 may also include additional steps not shown and / or may omit the steps shown, and the scope of the present invention is not limited in this respect. Figure 1 to Figure 2 Steps S210 to S230 are described in detail.

[0073] S210

[0074] In the hydrogenation mode, the diaphragm compressor 110 operates normally, controls the reflux pneumatic back pressure valve 141, the vent pneumatic valve 161, and the buffer tank intake pneumatic valve 154 to be closed, and controls the front tank intake pneumatic valve 121, the buffer tank pneumatic valve 153, the rear tank intake pneumatic valve 122 and the total exhaust pneumatic valve 131 to be opened, and the hydrogen from the hydrogen source 170 enters the diaphragm compressor 110 through the intake pipe 120 for pressurization treatment and is then discharged through the exhaust pipe 130 to enter hydrogen vehicles and other hydrogen-using devices.

[0075] During this process, the hydrogen from the hydrogen source 170 will experience pressure fluctuations of varying degrees after passing through the front-tank air intake pneumatic valve 121. When the hydrogen pressure in the air intake pipeline 120 exceeds the hydrogen pressure in the buffer tank 150, part of the hydrogen will enter the buffer tank 150 from the air intake pipeline 120 through the buffer tank pneumatic valve 153 on the first buffer pipeline 151. When the hydrogen pressure in the air intake pipeline 120 is lower than the hydrogen pressure in the buffer tank 150, the hydrogen in the buffer tank 150 will also enter the air intake pipeline 120 through the buffer tank pneumatic valve 153 on the first buffer pipeline 151. This ensures that the hydrogen pressure before entering the diaphragm head of the diaphragm compressor 110 is relatively stable, thereby increasing the life of the diaphragm.

[0076] In other words, the buffer tank 150 is used to compensate the pressure of the hydrogen before entering the membrane head of the diaphragm compressor 110 to avoid pressure fluctuations.

[0077] S220

[0078] When a hydrogen vehicle has completed refueling, but another vehicle to be refueled has not arrived yet, the gas boosting system 100 for the hydrogen refueling station is in a hydrogen refueling interval, and the gas boosting system 100 for the hydrogen refueling station automatically enters the automatic circulation mode, and the automatic circulation needs of the diaphragm compressor 110 can be met only by the hydrogen in the buffer tank 150.

[0079] In the automatic circulation mode, the control unit of the gas boosting system 100 for the hydrogen filling station controls the front tank air intake pneumatic valve 121, the total exhaust pneumatic valve 131, and the vent pneumatic valve 161 to close, and the rear tank air intake pneumatic valve 122, the buffer tank pneumatic valve 153, and the reflux pneumatic back pressure valve 141 to open. The hydrogen in the buffer tank 150 is pressurized by the diaphragm compressor 110 and then enters the air intake pipeline 120 through the reflux pipeline 140, realizing the automatic circulation of the diaphragm compressor 110. At this time, the reflux pneumatic back pressure valve 141 automatically adjusts the opening according to the outlet and inlet pressure transmitters, so that the outlet pressure of the membrane head remains unchanged at the preset pressure value, and the inlet pressure is within the preset pressure range, so that the exhaust pressure and the intake pressure maintain a certain ratio for automatic circulation.

[0080] It should be pointed out that the preset pressure value of the membrane head outlet pressure can be set to 35MPa or 70MPa according to the filling pressure, and the preset pressure range of the inlet pressure is 5-20MPa.

[0081] S230

[0082] When the hydrogenation interval exceeds a certain set time, the hydrogenation station gas boosting system 100 switches from the automatic circulation mode to the no-load mode, closes the buffer tank pneumatic valve 153 and the reflux pneumatic back pressure valve 141, opens the buffer tank air intake pneumatic valve 154, and monitors the exhaust pressure of the exhaust pipeline 130 and the intake pressure of the intake pipeline 120.

[0083] When it is determined that the exhaust pressure and the intake pressure meet the first preset condition, the buffer tank intake pneumatic valve 154 is controlled to be closed, and the vent pneumatic valve 161 is controlled to be opened to reduce the gas pressure in the pipeline; when it is determined that the exhaust pressure and the intake pressure are reduced to meet the second preset condition, the vent pneumatic valve 161 is controlled to be closed to make the diaphragm compressor 110 run at no load.

[0084] The first preset condition is that the exhaust pressure is approximately the same as the intake pressure, that is, the difference between the exhaust pressure and the intake pressure is less than a preset threshold. The second preset condition is that the exhaust pressure and the intake pressure are in a slightly positive pressure state. The slightly positive pressure state refers to the situation where the exhaust pressure and the intake pressure are 200 to 400 Pa higher than the atmospheric pressure.

[0085] In the hydrogenation mode, the automatic cycle of the hydrogenation intermittent mode and the no-load mode, the control unit automatically adjusts the opening of the oil pressure regulating valve 111 according to the exhaust pressure, so that the pressure before the oil pressure membrane is always 3 to 6 MPa higher than the exhaust pressure. After the diaphragm compressor 110 runs no-load for 8 to 15 minutes, the oil pressure regulating valve 111 is fully opened, the cooling system is closed, and the system is in a no-load state.

[0086] When restarting from no-load mode, first turn on the cooling system such as the cooler 132, and the control unit automatically adjusts the opening of the oil pressure regulating valve 111 to establish oil pressure on the diaphragm head of the diaphragm compressor 110, and then enters the automatic circulation mode, the front tank intake pneumatic valve 121, the main exhaust pneumatic valve 131, and the pneumatic vent valve are closed, the buffer tank pneumatic valve 153 and the reflux pneumatic back pressure valve 141 are opened successively, and the gas boosting system 100 for the hydrogen filling station enters the automatic circulation mode, and you can directly click on the filling to switch to the hydrogen filling mode.

[0087] When the hydrogenation station is closed at night or needs to be shut down for a long time, the gas boosting system 100 for the hydrogenation station needs to be shut down for a long time. The control unit first determines the state of the diaphragm compressor 110. If it is in the hydrogenation mode, it first switches to the automatic circulation mode of hydrogenation intermittent. In the automatic circulation mode, the buffer tank pneumatic valve 153 and the reflux pneumatic back pressure valve 141 are closed, and the buffer tank air intake pneumatic valve 154 is opened at the same time. When the exhaust pressure is approximately the same as the intake pressure, the buffer tank air intake pneumatic valve 154 is closed, and the pneumatic drain valve is opened. After the pressure in the pipeline is reduced to a slightly positive pressure state, the pneumatic drain valve is closed and the diaphragm compressor 110 is shut down. After the diaphragm compressor 110 is shut down for 8 to 15 minutes, the oil pressure regulating valve 111 is fully opened, the cooling system is shut down, and the system is in the shutdown state. In addition, the control scheme for the emergency shutdown of the diaphragm compressor 110 is also the same.

[0088] When the gas boosting system 100 for the hydrogen filling station is started again, the cooling system such as the cooler 132 is first turned on, and the lubricating oil pump is automatically started and operated for 1 to 3 minutes through the control unit. After the lubricating oil pressure is established, the main motor is turned on. After the main motor runs stably, the control unit automatically adjusts the opening of the oil pressure regulating valve 111 to establish oil pressure on the compressor diaphragm head, and then enters the automatic circulation mode. The front tank air intake pneumatic valve 121, the main exhaust pneumatic valve 131, and the vent pneumatic valve 161 are closed, and the rear tank air intake pneumatic valve 122, the buffer tank pneumatic valve 153 and the reflux pneumatic back pressure valve 141 are opened, and the diaphragm compressor 110 is successfully started.

[0089] In actual application, the operation can be performed by pressing an option or button in the control interface, thus achieving the purpose of one-button start and stop.

[0090] The present invention has the following advantages:

[0091] (1) A buffer tank 150 is provided between the air inlet pipe 120 and the return pipe 140 of the membrane head to ensure the stability of the gas pressure entering the membrane head and increase the life of the membrane.

[0092] (2) When in the automatic circulation mode, the return pneumatic back pressure valve 141 equipped on the return line 140 can automatically adjust the diaphragm head inlet pressure according to the diaphragm head exhaust pressure. This can ensure that when the intake pressure is low, the exhaust pressure and oil pressure difference is within the acceptable range of the diaphragm, thereby reducing the impact of the pressure difference on the diaphragm and increasing the service life of the diaphragm.

[0093] (3) A no-load mode is set on the basis of the automatic circulation mode to reduce energy consumption for a long period of time during the day without refueling, thereby achieving the purpose of energy saving. It is suitable for situations where there are fewer refueling vehicles, and broadens the use scenarios of the gas boosting system 100 for hydrogen refueling stations.

[0094] (4) The buffer tank 150 is equipped with a front-tank air intake pneumatic valve 121. Before entering the no-load mode, the hydrogen in the high-pressure hydrogen pipeline will enter the buffer tank 150 and be stored for reuse at the next startup, rather than being directly discharged, which can effectively save hydrogen.

[0095] (5) An oil pressure regulating valve 111 is provided at the oil pressure end of the diaphragm compressor 110, which can automatically adjust the oil pressure to match the exhaust pressure according to the mode, which is convenient and quick, and can further ensure that the diaphragm is not impacted by a large pressure difference, thereby increasing the service life.

[0096] The present invention also provides an electronic device, see Figure 3 A structural diagram of an electronic device 300 is shown, the electronic device 300 includes a processor 301 and a memory 302 communicatively connected to the processor 301, wherein the memory 302 is used to store one or more computer programs, and the one or more computer programs are executed by the processor 301 to implement the above-mentioned method 200.

[0097] Figure 3 The electronic device 300 shown further includes a bus 303 and a communication interface 304 , and the processor 301 , the communication interface 304 and the memory 302 are connected via the bus 303 .

[0098] The memory 302 may include a high-speed random access memory (RAM), and may also include a non-volatile memory 302 (Non-Volatile Memory), such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 304 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 303 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus 303 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus 303 or only one type of bus 303 .

[0099] The processor 301 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 301 or the instruction in the form of software. The above processor 301 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor 301 can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 302, and the processor 301 reads the information in the memory 302 and completes the steps of the method of the above embodiment in combination with its hardware.

[0100] An exemplary embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program. When the computer program is called and executed by the processor 301, the computer executable instructions prompt the processor 301 to implement the above-mentioned gas pressurization method 200 for hydrogen refueling stations. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0101] The computer program product of the gas pressurization method 200 for a hydrogen refueling station and the electronic device 300 provided in the embodiments of the present invention includes a computer-readable storage medium storing program codes. The instructions included in the program codes can be used to execute the methods in the previous method embodiments. For specific implementations, please refer to the method embodiments, which will not be repeated here.

[0102] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described device and / or electronic device can refer to the corresponding process in the aforementioned method embodiment and will not be repeated here.

[0103] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A gas pressurization system for a hydrogen refueling station, characterized in that: include: A diaphragm compressor, wherein the air inlet and the air outlet of the diaphragm compressor are respectively connected to an air inlet pipeline and an air outlet pipeline, and a total exhaust pneumatic valve is provided on the exhaust pipeline; A reflux pipeline, the two ends of which are respectively connected to the exhaust pipeline and the intake pipeline, and a reflux pneumatic valve is provided on the reflux pipeline; A buffer tank is connected to the intake pipeline and the return pipeline respectively through a first buffer pipeline and a second buffer pipeline, the first buffer pipeline is connected to the downstream of the connection point between the return pipeline and the intake pipeline, the second buffer pipeline is connected to the upstream of the return pneumatic valve, a pre-tank intake pneumatic valve is provided on the intake pipeline at a position upstream of the connection point between the return pipeline and the intake pipeline, a post-tank intake pneumatic valve is provided on the intake pipeline at a position downstream of the connection point between the first buffer pipeline and the intake pipeline, a buffer tank pneumatic valve is provided on the first buffer pipeline, and a buffer tank intake pneumatic valve is provided on the second buffer pipeline; A vent pipeline, the air intake pipeline, the exhaust pipeline, the buffer tank and the return pipeline are connected to the vent pipeline, and a vent pneumatic valve is provided on the vent pipeline.

2. The gas pressurization system for a hydrogen refueling station according to claim 1, characterized in that: The reflux pneumatic valve is a reflux pneumatic back-pressure valve.

3. The gas pressurizing system for a hydrogen refueling station according to claim 1, characterized in that: A cooler is arranged on the exhaust pipeline.

4. The gas pressurization system for a hydrogen refueling station according to claim 1, characterized in that: The oil pressure end of the diaphragm compressor is provided with an oil pressure regulating valve for controlling the pressure in front of the oil pressure diaphragm.

5. A gas pressurization method for a hydrogen refueling station, applied to a gas pressurization system for a hydrogen refueling station according to any one of claims 1 to 4, characterized in that: include: In the hydrogenation mode, the reflux pneumatic valve and the vent pneumatic valve are controlled to be closed, and the front tank air intake pneumatic valve, the rear tank air intake pneumatic valve, the buffer tank pneumatic valve and the total exhaust pneumatic valve are controlled to be opened, and the hydrogen from the intake pipeline is pressurized by the diaphragm compressor and then discharged through the exhaust pipeline; In the automatic circulation mode of hydrogenation intermittently, the front-tank air intake pneumatic valve, the main exhaust pneumatic valve and the vent pneumatic valve are controlled to be closed, and the reflux pneumatic valve, the buffer tank pneumatic valve and the rear-tank air intake pneumatic valve are controlled to be opened. The hydrogen in the buffer tank is pressurized by the diaphragm compressor and then enters the air intake pipeline through the reflux pipeline, thereby realizing the automatic circulation of the diaphragm compressor.

6. The gas pressurization method for a hydrogen refueling station according to claim 5, characterized in that: When the duration of the automatic circulation mode exceeds a preset time threshold, the buffer tank pneumatic valve and the return pneumatic valve are controlled to be closed, and the buffer tank air intake pneumatic valve is controlled to be opened, while the exhaust pressure of the exhaust pipeline and the air intake pressure of the air intake pipeline are monitored; and The opening and closing of the buffer tank air intake pneumatic valve and the air exhaust pneumatic valve are controlled according to the exhaust pressure and the intake pressure.

7. The gas pressurization method for a hydrogen refueling station according to claim 6, characterized in that: The step of controlling the opening and closing of the buffer tank air intake pneumatic valve and the air exhaust pneumatic valve according to the exhaust pressure and the intake pressure comprises: When it is determined that the exhaust pressure and the intake pressure meet a first preset condition, controlling the buffer tank intake pneumatic valve to close, and controlling the exhaust pneumatic valve to open; When it is determined that the exhaust pressure and the intake pressure are reduced to meet a second preset condition, the pneumatic vent valve is controlled to be closed, so that the diaphragm compressor runs at no load.

8. The gas pressurization method for a hydrogen refueling station according to any one of claims 5 to 7, characterized in that: When the diaphragm compressor is running, the pressure before the oil pressure diaphragm is controlled by controlling the opening of the oil pressure regulating valve.

9. An electronic device, characterized in that: include: processor; A memory, wherein a computer program configured to be executed by the processor is stored in the memory, and when the processor executes the computer program, the gas pressurization method for a hydrogen refueling station according to any one of claims 5 to 8 is implemented.

10. A readable storage medium, characterized in that: A computer program is stored on the readable storage medium, and when the computer program is executed by the processor, the gas pressurization method for a hydrogen refueling station according to any one of claims 5 to 8 is implemented.

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