Hydrogen storage and supply device, system

Abstract

The utility model relates to a kind of hydrogen storage and supply device, system, the device includes storage pipeline and the first storage tank and second storage tank connected therewith, and power device and adjusting device. The first storage tank stores water, it has gas storage mode and gas supply mode. Under gas storage mode, the hydrogen gas of hydrogen production equipment is received and stored by the first storage tank, and water is transferred to the second storage tank. Under gas supply mode, the water of second storage tank is transferred to the first storage tank by power device to discharge hydrogen gas for gas supply. Adjusting device is used to adjust the flow or exhaust volume of hydrogen gas received by the first storage tank. The gas storage and gas supply process of the system does not need to use expensive hydrogen compressor, and is safer, lower power consumption. And by setting adjusting device, the flow or exhaust volume of hydrogen gas received by the first storage tank can be adjusted, so that the pressure of each storage tank and the entire system can be kept constant, the hydrogen pressure of pipe network is stable, and the pressure cycle fluctuation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen storage and supply technology, and in particular to a hydrogen storage and supply device and system. Background Technology

[0002] For applications where hydrogen is used as a raw material (such as for the production of green liquid fuels and pipeline hydrogen), direct hydrogen storage is the most economical and efficient method. A hydrogen storage and transportation system must be built. When renewable power is sufficient, multiple electrolyzers are used to accelerate the production and storage of hydrogen. When the output of renewable power decreases or stops, the stored hydrogen is then transported out.

[0003] Existing hydrogen storage methods include compressed hydrogen storage, liquid hydrogen storage, organic liquid storage, and metal hydrogen storage, among others. The most common method is compressed hydrogen storage, where hydrogen produced by water electrolysis is compressed by a compressor (or directly introduced into the storage tank at a pressure of 1.6MPa-3.0MPa after water electrolysis without compression) before entering the storage tank. When hydrogen is needed, the hydrogen in the tank is released. Because the tank pressure changes during the hydrogen storage and release process, a compressor must be used to compress the hydrogen when the pressure in the tank is lower than the hydrogen usage pressure. To release as much hydrogen as possible from the tank, the compressor inlet pressure is reduced, resulting in high power consumption for the hydrogen compressor. Due to the disadvantages of hydrogen, such as difficulty in compression, small molecular weight leading to easy leakage, wide explosive range, poor safety, and hydrogen embrittlement, existing compressed hydrogen storage devices involve large investments, high energy consumption, and poor safety.

[0004] Therefore, there is an urgent need for a hydrogen storage and supply system that is low in power consumption, low in cost, and high in safety. Utility Model Content

[0005] One objective of this invention is to overcome the shortcomings of existing technologies and provide a hydrogen storage and supply device. To solve the aforementioned technical problems, this invention adopts the following technical solution:

[0006] A hydrogen storage and supply device, comprising:

[0007] Storage pipelines are used to connect to hydrogen production equipment to receive hydrogen gas;

[0008] A first storage tank and a second storage tank are connected to a storage pipeline, wherein the first storage tank contains pre-stored water;

[0009] The power unit is located between the first and second storage tanks;

[0010] The regulating device is installed on the pipeline connected to the first storage tank and / or the second storage tank;

[0011] The first storage tank has a gas storage mode and a gas supply mode. In the gas storage mode, the first storage tank receives and stores hydrogen from the hydrogen production equipment and transfers water to the second storage tank.

[0012] In the gas supply mode, the water in the second storage tank is transferred by the power unit to the first storage tank to discharge hydrogen for gas supply; wherein, the regulating device is used to regulate the flow rate of hydrogen received by the first storage tank or the discharge volume.

[0013] In one embodiment, the regulating device includes a hydrogen supply regulating valve disposed on the storage pipeline, which is used to regulate the flow rate of hydrogen entering the first storage tank according to the pipeline network pressure of the storage pipeline and the pressure of the first storage tank.

[0014] In one embodiment, the regulating device includes an inlet regulating valve, which is disposed on a pipeline that is connected to both the first and second storage tanks;

[0015] The inlet regulating valve is used to control the water flow rate into the second storage tank according to the pipeline network pressure, thereby regulating the hydrogen receiving flow rate in the first storage tank; or,

[0016] The inlet regulating valve is used to control the water flow rate into the first storage tank according to the pipeline network pressure of the storage pipeline, so as to regulate the venting volume of the first storage tank.

[0017] In one embodiment, the hydrogen storage and supply device includes a speed regulator electrically connected to a power unit. The speed regulator is capable of adjusting the operation of the power unit according to the downstream hydrogen consumption to regulate the water flow rate into the first storage tank, thereby regulating the exhaust volume of the first storage tank.

[0018] In one embodiment, the power unit is a reversible water pump turbine. When the first storage tank receives and stores hydrogen from the hydrogen production equipment and transfers water to the second storage tank, the power unit can generate electricity using the water.

[0019] In one embodiment, the reversible pump-turbine is equipped with an inlet guide vane with adjustable opening. The reversible pump-turbine can control the opening of the inlet guide vane according to the pipeline pressure of the storage pipeline to adjust the water flow rate entering the second storage tank, thereby adjusting the flow rate of hydrogen received by the first storage tank.

[0020] In one embodiment, the hydrogen storage and supply device includes a bypass pipeline connected between a first storage tank and a second storage tank and configured in parallel with the power unit. When the first storage tank receives and stores hydrogen from the hydrogen production equipment, the water in the first storage tank can enter the second storage tank through the bypass pipeline.

[0021] A bypass valve is installed on the bypass line to control the opening and closing of the bypass line.

[0022] In one embodiment, the hydrogen storage and supply device includes a gas-liquid separator disposed between a first storage tank and a second storage tank and connected in series with a power unit. The gas-liquid separator is used to separate water and gas in the water transferred to the first storage tank.

[0023] In one embodiment, the hydrogen storage and supply device includes an inlet regulating valve located at the inlet of the gas-liquid separator. The inlet regulating valve is used to control the flow rate of water entering the gas-liquid separator according to the liquid level of the gas-liquid separator.

[0024] In one embodiment, the hydrogen storage and supply device includes a gas bladder connected to the gas outlet of a gas-liquid separator.

[0025] In one embodiment, the top of the first storage tank is connected to a gas phase pipeline, which is connected to a hydrogen production device, and a gas phase valve is provided on the gas phase pipeline.

[0026] The bottom of the first storage tank is connected to a first liquid phase pipeline and a second liquid phase pipeline, respectively. A first liquid phase valve is installed on the first liquid phase pipeline and a second liquid phase valve is installed on the second liquid phase pipeline.

[0027] The bottom of the second storage tank is connected to a third liquid phase pipeline and a fourth liquid phase pipeline. The third liquid phase pipeline is connected to the second liquid phase pipeline, and the fourth liquid phase pipeline is connected to the first liquid phase pipeline. A third liquid phase valve is installed on the third liquid phase pipeline, and a fourth liquid phase valve is installed on the fourth liquid phase pipeline.

[0028] Another objective of this utility model is to provide a hydrogen storage and supply device, comprising:

[0029] Storage pipelines are used to connect to hydrogen production equipment to receive hydrogen gas;

[0030] Multiple storage tanks, including at least one pair of first and second storage tanks, both of which are connected to storage pipelines, wherein water is pre-stored in the first storage tank;

[0031] The power unit is located between the first and second storage tanks;

[0032] The regulating device is installed on the pipeline connected to the first storage tank and / or the second storage tank;

[0033] Each of the first storage tanks has a gas storage mode and a gas supply mode. In the gas storage mode, the first storage tank receives and stores hydrogen from the hydrogen production equipment and transfers water to the second storage tank.

[0034] In the gas supply mode, the water in the second storage tank is transferred by the power unit to the first storage tank to discharge hydrogen for gas supply; wherein, the regulating device is used to regulate the flow rate of hydrogen received by the first storage tank or the discharge volume.

[0035] Another objective of this utility model is to provide a hydrogen storage and supply system, including a hydrogen production device and any of the above-mentioned devices, wherein the storage pipeline is connected to the outlet end of the hydrogen production device.

[0036] The outlet of the hydrogen production equipment is also connected to a hydrogen use pipeline. The hydrogen use pipeline is set up in parallel with the storage pipeline, and the hydrogen supplied by the first storage tank flows into the hydrogen use pipeline.

[0037] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0038] In this invention, the hydrogen storage and supply device includes a storage pipeline and a first and second storage tank connected to it, as well as a power unit and a regulating device. The first storage tank contains water, while the second storage tank is empty. The hydrogen production equipment can supply hydrogen to the first storage tank through the storage pipeline, allowing the water in the first tank to enter the second storage tank, thus achieving the filling of the first storage tank. The regulating device ensures pressure balance during the filling process.

[0039] Furthermore, the system uses a power unit as its power source and water as its driving medium to transfer water from the second storage tank to the first storage tank, enabling the hydrogen in the first storage tank to be supplied externally. Simultaneously, the pressure balance during the supply process is maintained by a regulating device. Therefore, the hydrogen storage and supply device of this application eliminates the need for expensive hydrogen compressors, resulting in better safety, lower power consumption, higher reliability, and significantly reduced costs. Moreover, the first storage tank retains a small amount of hydrogen during each filling and discharging process, leading to higher tank utilization and saving on tank investment costs.

[0040] In this device, the flow rate of hydrogen received or the exhaust volume of the first storage tank can be adjusted by setting a regulating device, thereby ensuring that the pressure of each storage tank and the entire system is constant, ensuring the stability of the hydrogen pressure in the pipeline network, and reducing pressure periodic fluctuations.

[0041] In this device, the first and second storage tanks are interconnected by pipelines, allowing water to flow between them. Because the water flows within a closed pipeline, it does not come into contact with air, effectively preventing corrosion of the inner walls of either the first or second storage tank and extending their service life. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of a hydrogen storage and supply device and system according to an embodiment of the present invention.

[0043] Figure 2 yes Figure 1 The diagram shows the process flow of the system under non-energy recovery inflation conditions.

[0044] Figure 3 yes Figure 1 The diagram shows the process flow of the system under the condition of energy recovery and inflation.

[0045] Figure 4 yes Figure 1 The diagram shows the flow chart of the system under gas supply conditions.

[0046] Figure 5 yes Figure 1 The diagram shows the process flow of the system under liquid-free aeration conditions.

[0047] The annotations in the attached figures are explained as follows:

[0048] 10-Hydrogen production equipment; 11-Storage pipeline; 12-Hydrogen consumption pipeline; 13-Check valve;

[0049] 10' - Hydrogen-using equipment;

[0050] 20 - First storage tank; 21 - Gas phase pipeline; 211 - Gas phase valve; 22 - First liquid phase pipeline; 221 - First liquid phase valve; 23 - Second liquid phase pipeline; 231 - Second liquid phase valve;

[0051] 30 - Second storage tank; 31 - Third liquid phase pipeline; 311 - Third liquid phase valve; 32 - Fourth liquid phase pipeline; 321 - Fourth liquid phase valve; 33 - Second gas phase pipeline; 331 - Second gas phase valve;

[0052] 40-Power unit; 41-Water turbine outlet valve; 42-Speed ​​governor;

[0053] 50 - Regulating device; 51 - Hydrogen supply regulating valve; 52 - Water inlet regulating valve;

[0054] 60 - Bypass line; 61 - Bypass valve;

[0055] 70 - Gas-liquid separator; 71 - Airbag; 72 - Inlet regulating valve;

[0056] 80 - Control valve; 90 - Water supply pipeline. Detailed Implementation

[0057] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0058] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, 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. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0059] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] Please see Figure 1 As shown, the hydrogen storage and supply system of this application embodiment includes a hydrogen production device 10 and a hydrogen storage and supply device (hereinafter referred to as the device). The hydrogen production device 10 is used to produce hydrogen. For example, the hydrogen production device 10 can be an electrolysis hydrogen production device 10, which can utilize renewable electricity to produce hydrogen. The renewable electricity can be wind power or solar power, etc.

[0061] The number of hydrogen production devices 10 can be one or more. When there are multiple hydrogen production devices 10, they are connected in parallel.

[0062] like Figure 1 As shown, the outlet end of the hydrogen production equipment 10 is connected to a hydrogen-using pipeline 12. The hydrogen production equipment 10 can be connected to a downstream hydrogen-using equipment 10' via the hydrogen-using pipeline 12 to supply hydrogen to the hydrogen-using equipment 10'.

[0063] like Figure 1 As shown, the device includes a storage line 11, which is connected to the outlet end of the hydrogen production equipment 10. The storage line 11 and the hydrogen consumption line 12 are connected in parallel. Therefore, the storage line 11 and the hydrogen consumption line 12 can simultaneously receive hydrogen produced by the hydrogen production equipment 10.

[0064] The storage pipeline 11 is mainly used to receive hydrogen produced by the hydrogen production equipment 10 and store the hydrogen in each of the first storage tanks 20. For example, when the amount of hydrogen produced by the hydrogen production equipment 10 exceeds the amount of hydrogen consumed by the downstream hydrogen-consuming equipment 10', the excess hydrogen can be transported to each of the first storage tanks 20 for storage via the storage pipeline 11.

[0065] When the amount of hydrogen produced by the hydrogen production equipment 10 is less than the amount of hydrogen required by the downstream hydrogen-consuming equipment 10', the insufficient hydrogen can be supplemented by the hydrogen in each of the first storage tanks 20. For example, the hydrogen supplied by each of the first storage tanks 20 can be channeled into the hydrogen-consuming pipeline 12, thereby supplying hydrogen to the hydrogen-consuming equipment 10'.

[0066] The following detailed description, in conjunction with the accompanying drawings, will provide a specific embodiment of the hydrogen storage and supply device of this application.

[0067] See Figure 1As shown, the hydrogen storage and supply device of this application embodiment includes a storage pipeline 11 and a first storage tank 20 and a second storage tank 30 connected to the storage pipeline 11, as well as a power unit 40 and a regulating device 50. The storage pipeline 11 is connected between the hydrogen production equipment 10 and the hydrogen consumption equipment 10', and is arranged in parallel with the hydrogen consumption pipeline 12.

[0068] like Figure 1 As shown, the device may include a plurality of storage tanks, and the plurality of storage tanks include at least one pair of first storage tanks 20 and second storage tanks 30. That is, the hydrogen storage and supply device of some embodiments of this application may include a set of storage tanks, the set of storage tanks including a first storage tank 20 and a second storage tank 30 respectively connected to the storage pipeline 11.

[0069] Alternatively, in other embodiments, the device may also include two or more sets of storage tanks, each set of storage tanks including a first storage tank 20 and a second storage tank 30, and the first storage tank 20 and the second storage tank 30 of each set of storage tanks are respectively connected to the storage pipeline 11.

[0070] The first storage tank 20 and the second storage tank 30 can be spherical tanks. It is understood that in other embodiments, the first storage tank 20 and the second storage tank 30 can also be cylindrical tanks or other shapes of tanks, or high-pressure tubing bundles.

[0071] like Figure 1 As shown, in this application, the first storage tank 20 is pre-stored with water. The corresponding second storage tank 30 can be empty. It should be noted that the phrase "the first storage tank 20 is pre-stored with water, and the corresponding second storage tank 30 can be empty" refers to the initial state of the first storage tank 20 and the corresponding second storage tank 30 when the device enters the hydrogen receiving and storage mode. For example, when the device enters the hydrogen receiving and storage mode, the first storage tank 20 stores water, and the corresponding second storage tank 30 is empty.

[0072] In this implementation, the operating condition / state of the device receiving and storing hydrogen is defined as gas filling. For example, if the first storage tank 20 receives and stores hydrogen, it is defined as filling the first storage tank 20.

[0073] It is understood that in other embodiments, such as when the device is not delivered or not in operation, both the first storage tank 20 and the second storage tank 30 may be empty. Before the device begins operation, water can be filled into the first storage tank 20 via an external water supply device.

[0074] like Figure 1 As shown, the first storage tank 20 is a closed container. The first storage tank 20 can be connected to the storage pipeline 11 via a pipeline to receive and store hydrogen produced by the hydrogen production equipment 10, and can supply hydrogen to the downstream hydrogen-using equipment 10'.

[0075] For example, in one embodiment, the top of the first storage tank 20 is connected to a gas phase pipeline 21, which is connected to the storage pipeline 11. When the device has multiple sets of storage tanks, the gas phase pipelines 21 of the first storage tanks 20 in each set are connected in parallel and all connected to the storage pipeline 11. Thus, the hydrogen production equipment 10 can be connected to the corresponding first storage tank 20 through the storage pipeline 11 and each gas phase pipeline 21. Each first storage tank 20 can also be connected to the downstream hydrogen-using equipment 10' through the corresponding gas phase pipeline 21 and storage pipeline 111.

[0076] like Figure 1 As shown, a gas phase valve 211 is installed on the gas phase pipeline 21. The gas phase valve 211 can be a bidirectional gas phase valve. When hydrogen needs to be added to the first storage tank 20, the gas phase valve 211 on the gas phase pipeline 21 is opened, allowing the hydrogen produced by the hydrogen production equipment 10 to enter the first storage tank 20. When the first storage tank 20 supplies gas, the gas phase valve 211 on the gas phase pipeline 21 is opened, allowing the hydrogen in the first storage tank 20 to be supplied externally.

[0077] like Figure 1 As shown, a check valve 13 may be installed on the gas phase pipeline 21 leading to the hydrogen-using equipment 10, so as to prevent hydrogen backflow and ensure the safe and reliable operation of the system.

[0078] See Figure 1 In this application, the second storage tank 30 is a closed container. The second storage tank 30 can be connected to the first storage tank 20 through a pipeline, so that the second storage tank 30 can receive water from the first storage tank 20, or so that the water in the second storage tank 30 can return to the first storage tank 20.

[0079] For example, when the hydrogen produced by the hydrogen production equipment 10 exceeds the hydrogen consumption flow rate, the excess hydrogen can be transported to the first storage tank 20 via the storage pipeline 11 for storage, i.e., the system enters the gas filling stage. At this time, the first storage tank 20 is in gas storage mode, and the first storage tank 20 can receive and store the hydrogen from the hydrogen production equipment 10 and transfer water to the second storage tank 30.

[0080] See Figure 1 As shown in this application, the power unit 40 is disposed between the first storage tank 20 and the second storage tank 30. The power unit 40 is mainly used to return the water in the second storage tank 30 to the first storage tank 20.

[0081] For example, when the amount of hydrogen produced by the hydrogen production equipment 10 is lower than the required amount, the insufficient hydrogen can be supplemented by hydrogen in the first storage tank 20, i.e., the system enters the gas supply stage. At this time, the first storage tank 20 is in gas supply mode, and the water in the second storage tank 30 can be transferred to the first storage tank 20 via the power mechanism 40 to discharge hydrogen for gas supply.

[0082] Therefore, in the hydrogen storage and supply device of this application, the first storage tank 20 can switch back and forth between the state of storing water or storing gas, and the second storage tank 30 can correspondingly switch back and forth between the state of empty tank or storing water, thereby realizing the storage of hydrogen or the supply of hydrogen to the outside.

[0083] like Figure 1 As shown, the effective volume of the first storage tank 20 is equal to or approximately equal to the effective volume of the corresponding second storage tank 30. Therefore, when water from the first storage tank 20 enters the empty second storage tank 30, the water in the first storage tank 20 is almost completely emptied, allowing it to store an equal volume of hydrogen. Conversely, when water from the second storage tank 30 returns to the first storage tank 20, an equal volume of hydrogen can be almost completely discharged from the first storage tank 20. Thus, the device only needs to fill the first storage tank 20 with water to achieve sufficient inflation or deflation of the first storage tank 20. Compared to other solutions using water storage tanks or similar equipment, the device in this application has higher operating efficiency, a smaller footprint, and lower investment costs for the water storage tanks.

[0084] It should be noted that, in the embodiments of this application, the pressure of the hydrogen produced by the hydrogen production equipment 10 can be 1.6 MPa or higher. Therefore, the network pressure of the storage pipeline 11 and the hydrogen consumption pipeline 12 can be 1.6 MPa or higher. The pressure resistance of the first storage tank 20 and the second storage tank 30 can be not less than 1.6 MPa. The operating pressure of the power unit 40 can be not less than 1.6 MPa.

[0085] See Figure 1 In one embodiment, the power unit 40 is a reversible water pump turbine. When the first storage tank 20 receives and stores hydrogen from the hydrogen production equipment 10 and transfers water to the second storage tank 30, the power unit 40 can generate electricity using the water. In this embodiment, the power unit 40 is a reversible water pump turbine, which integrates the turbine and the pump into one unit. The working principle of the reversible water pump turbine is that it can switch between turbine mode and pump mode. In turbine mode, the impeller of the reversible water pump turbine is driven by the water flow to rotate, and can convert water energy into mechanical energy to drive the generator to generate electricity. In pump mode, the impeller of the reversible water pump turbine is driven by external power to rotate, thereby driving the water flow to achieve the pumping function. The water flow directions of the pump and the turbine are exactly opposite.

[0086] By using a reversible pump-turbine, during the gas filling process, water in the first storage tank 20 can be transferred to the second storage tank 30 via the reversible pump-turbine. At this time, the reversible pump-turbine operates in turbine mode, utilizing the water to generate electricity. During the gas supply process, the reversible pump-turbine operates in pump mode, using external power to pump water from the second storage tank 30 to the first storage tank 20, thus supplying hydrogen externally.

[0087] like Figure 1As shown, in one embodiment, the hydrogen storage and supply device includes a speed governor 42, which is electrically connected to the power unit 40. For example, the speed governor 42 is electrically connected to a reversible water pump turbine.

[0088] The speed governor 42 can adjust the operation of the power unit 40 according to the downstream hydrogen consumption to regulate the water entering the first storage tank 20, thereby regulating the exhaust volume of the first storage tank 20. Specifically, when the system is supplying gas, the reversible water pump turbine is in pump mode. At this time, the speed governor 42 can adjust the pump speed according to the downstream hydrogen consumption to regulate the water flow rate entering the first storage tank 20, thereby regulating the exhaust volume of the first storage tank 20 and ensuring a constant hydrogen pressure.

[0089] For example, the reversible pump-turbine may be equipped with an adjustable inlet guide vane on the water inlet side during turbine operation. When the system is being charged, the reversible pump-turbine is in turbine operation mode. At this time, the reversible pump-turbine can control the opening of its inlet guide vane according to the network pressure of the storage pipeline 11 to regulate the water flow rate entering the second storage tank 30, thereby controlling the hydrogen flow rate entering the first storage tank 20 and ensuring a constant hydrogen pressure.

[0090] In this application, the power unit 40 employs a reversible water pump turbine, which not only ensures the reliable operation of the hydrogen storage and supply device but also effectively recovers energy during the charging phase, improving the system's energy utilization rate. Furthermore, the electrical energy converted by the reversible water pump turbine can be supplied to the hydrogen production equipment 10, further reducing the energy consumption of the hydrogen storage and supply device.

[0091] like Figure 1 As shown, the reversible pump-turbine has a turbine outlet valve 41 on the outlet side during turbine operation. When the turbine outlet valve 41 is opened, water from the first storage tank 20 can flow to the second storage tank 30 via the reversible pump-turbine, enabling the reversible pump-turbine to generate electricity using water. When the turbine outlet valve 41 is closed, water from the first storage tank 20 can flow to the second storage tank 30 via other pipelines.

[0092] It is understood that in other embodiments, the power unit 40 may also be a water pump. Furthermore, the speed regulator 42 may be electrically connected to the water pump and may adjust the pump speed according to the downstream hydrogen consumption to regulate the water flow rate entering the first storage tank 20, thereby regulating the exhaust volume of the first storage tank 20.

[0093] In addition, during the inflation phase of the system, water from the first storage tank 20 can enter the second storage tank 30 through other pipelines.

[0094] See Figure 1 and Figure 2As shown, in another embodiment, the hydrogen storage and supply device includes a bypass pipeline 60, which connects the first storage tank 20 and the second storage tank 30 and is configured in parallel with the power unit 40. When the first storage tank 20 receives and stores hydrogen from the hydrogen production equipment 10, water in the first storage tank 20 can enter the second storage tank 30 via the bypass pipeline 60.

[0095] By setting up a bypass pipe 60, water in the first storage tank 20 can enter the second storage tank 30 through the bypass pipe 60 without passing through the pipeline where the power unit 40 is located, thereby broadening the system's operating modes and improving the system's operational reliability.

[0096] like Figure 1 As shown, a bypass valve 61 can be installed on the bypass pipeline 60 to control the opening and closing of the bypass pipeline 60. When it is necessary to use the bypass pipeline 60 to allow water to enter the second storage tank 30, the bypass valve 61 can be opened. Conversely, the bypass valve 61 can be closed. The bypass valve 61 can be a two-way valve.

[0097] See Figure 1 In one embodiment, the bottom of the first storage tank 20 is connected to a first liquid phase pipeline 22 and a second liquid phase pipeline 23. The first liquid phase pipeline 22 and the second liquid phase pipeline 23 can both be connected to the power unit 40 and the bypass pipeline 60.

[0098] The bottom of the second storage tank 30 is connected to a third liquid phase pipeline 31 and a fourth liquid phase pipeline 32. Both the third liquid phase pipeline 31 and the fourth liquid phase pipeline 32 can be connected to the power unit 40 and the bypass pipeline 60. The third liquid phase pipeline 31 can be connected to the second liquid phase pipeline 23 through the pipeline of the power unit 40 and the bypass pipeline 60, and the fourth liquid phase pipeline 32 can be connected to the first liquid phase pipeline 22 through the pipeline of the power unit 40 and the bypass pipeline 60.

[0099] In this embodiment, each liquid phase pipeline can be used for water inlet or water outlet, so that the first storage tank 20 and the second storage tank 30 can be connected to each other, so that the water in the first storage tank 20 can enter the second storage tank 30 through the power device 40 or the bypass pipeline 60; or, so that the water in the second storage tank 30 can return to the first storage tank 20 under the action of the power device 40.

[0100] like Figure 1 As shown, a first liquid phase valve 221 is provided on the first liquid phase pipeline 22, and a second liquid phase valve 231 is provided on the second liquid phase pipeline 23. The first liquid phase valve 221 and the second liquid phase valve 231 can be bidirectional valves, thereby reducing the number of valves required in the system and simplifying the system setup.

[0101] like Figure 1As shown, a third liquid phase valve 311 is provided on the third liquid phase pipeline 31, and a fourth liquid phase valve 321 is provided on the fourth liquid phase pipeline 32. The third liquid phase valve 311 and the fourth liquid phase valve 321 can be bidirectional valves, thereby reducing the number of valves required in the system and simplifying the system setup.

[0102] Of course, in other embodiments, each liquid phase valve may also be a pair of parallel check valves to control the inlet and outlet of each liquid phase pipeline respectively, depending on the situation.

[0103] See Figure 1 As shown, in one embodiment, the hydrogen storage and supply device includes a control valve 80, which is installed on a pipeline connected to both the first liquid phase pipeline 22 and the third liquid phase pipeline 31. The control valve 80 is used to control the opening or closing of the first liquid phase pipeline 22 and the third liquid phase pipeline 31. The control valve 80 can be a bidirectional valve, thereby reducing the number of valves required in the system and simplifying the system setup.

[0104] When water needs to enter or exit through the first liquid phase pipeline 22 or the third liquid phase pipeline 31, the control valve 80 and the corresponding first liquid phase valve 221 or third liquid phase valve 311 can be opened simultaneously. Therefore, by setting the control valve 80, the operational reliability of the system can be improved.

[0105] See Figure 1 As shown in this application, the regulating device 50 is installed on the pipeline connected to the first storage tank 20 and / or the second storage tank 30, and is mainly used to regulate the flow rate of hydrogen received by the first storage tank 20 or the exhaust volume.

[0106] For example, such as Figure 1 As shown, the regulating device 50 includes a hydrogen supply regulating valve 51, which is installed on the storage pipeline 11. The hydrogen supply regulating valve 51 is used to regulate the flow rate of hydrogen entering the first storage tank 20 according to the pipeline pressure of the storage pipeline 11, i.e., the pressure of the hydrogen produced by the hydrogen production equipment 10, and the pressure of the first storage tank 20. Thus, by regulating the hydrogen supply valve 51, the flow rate of hydrogen received by the first storage tank 20 can be adjusted, ensuring a constant system hydrogen pressure and avoiding pressure fluctuations.

[0107] It should be noted that the techniques for detecting the pipeline pressure or tank pressure of storage pipeline 11 are readily understood, such as installing a pressure sensor on storage pipeline 11; and installing a pressure sensor on the tank and electrically connecting the pressure sensor to an external control system. The external control system is used to monitor the operation of the entire system, and this application does not specifically limit it.

[0108] See Figure 1In some embodiments, the regulating device 50 includes an inlet regulating valve 52, which is disposed on a pipeline that is connected to both the first storage tank 20 and the second storage tank 30. For example, the inlet regulating valve 52 may be disposed on a pipeline that is connected to both the second liquid phase pipeline 23 and the fourth liquid phase pipeline 32.

[0109] During the gas filling phase, the water inlet regulating valve 52 can control the water flow rate entering the second storage tank 30 based on the pipeline pressure of the storage pipeline 11, i.e., the pressure of the hydrogen produced by the hydrogen production equipment 10, thereby regulating the flow rate of hydrogen received by the first storage tank 20. During the gas supply phase, the water inlet regulating valve 52 can control the water flow rate entering the first storage tank 20 based on the pipeline pressure of the storage pipeline 11, i.e., the pressure of the hydrogen produced by the hydrogen production equipment 10, thereby regulating the exhaust volume of the first storage tank 20.

[0110] In this embodiment, by setting the water inlet regulating valve 52, the water flow rate entering the first storage tank 20 or the second storage tank 30 can be adjusted according to the hydrogen pressure, so as to adjust the flow rate of hydrogen received by the first storage tank 20 or the exhaust volume, and ensure that the hydrogen pressure of the system is constant.

[0111] It is understood that in other embodiments, the regulating device 50 may include a first regulating valve disposed on the fourth liquid phase pipeline 32, which can regulate the water flow rate entering the second storage tank 30, thereby regulating the flow rate of hydrogen received by the first storage tank 20. The regulating device 50 may also include a second regulating valve disposed on the second liquid phase pipeline 23, which can regulate the water flow rate entering the first storage tank 20, thereby regulating the exhaust volume of the first storage tank 20, and the specific configuration can be determined according to actual needs.

[0112] See Figure 1 In one embodiment, the hydrogen storage and supply device includes a gas-liquid separator 70, which is disposed between the first storage tank 20 and the second storage tank 30 and connected in series with the power unit 40. The gas-liquid separator 70 is used to separate water and gas in the water transferred to the first storage tank 20.

[0113] Specifically, the gas-liquid separator 70 is provided with an inlet, a liquid outlet, and a gas outlet. The inlet of the gas-liquid separator 70 is connected to the bottom of the second storage tank 30 to receive water from the second storage tank 30. The liquid outlet of the gas-liquid separator 70 is connected to the bottom of the first storage tank 20 to allow water to enter the first storage tank 20. The gas outlet of the gas-liquid separator 70 can be connected to the outside or to an external gas storage structure, such as an airbag 71.

[0114] Optionally, such as Figure 1As shown, the hydrogen storage and supply device includes a gas bladder 71, which is connected to the gas outlet of the gas-liquid separator 70. By storing the small amount of hydrogen separated by the gas-liquid separator 70 through the gas bladder 71, the pressure of the gas-liquid separator 70 can be kept constant, avoiding pressure fluctuations caused by possible fluctuations in the liquid level. This ensures that the inlet pressure of the power unit 40, i.e., the water pump, remains constant, thus ensuring stable system operation.

[0115] See Figure 1 In one embodiment, the hydrogen storage and supply device includes an inlet regulating valve 72, which is located at the inlet of the gas-liquid separator 70. The inlet regulating valve 72 can control the flow rate of water entering the gas-liquid separator 70 according to the liquid level in the gas-liquid separator 70. This ensures a constant liquid level within the gas-liquid separator 70, which helps maintain a constant pressure in the gas-liquid separator 70 and ensures stable system operation.

[0116] See Figure 1 In one embodiment, the hydrogen storage and supply device includes a water supply line 90, which can be connected to an external water source such as a water tank to replenish the system with water as needed.

[0117] See Figures 2 to 4 The hydrogen storage and supply device in this application embodiment can operate in three modes, as follows: In the accompanying drawings, blue arrows represent hydrogen flow, and green arrows represent water flow. Solid lines in the drawings represent system pipelines, and dashed lines represent system control lines.

[0118] 1. Inflation without energy recovery

[0119] like Figure 2 As shown, the system includes four storage tanks, with each pair of tanks forming a group. Each group includes a first storage tank 20 and a second storage tank 30. Taking one group of first storage tanks 20 and second storage tanks 30 as an example:

[0120] When the hydrogen production equipment 10 operates at full load (with a large number of electrolyzers running) or at a high load, the generated hydrogen exceeds the downstream hydrogen consumption flow, at which point the system enters the charging stage. The hydrogen production equipment 10 charges the first storage tank 20 with hydrogen through the storage pipeline 11 and the gas phase pipeline 21 at the top of the first storage tank 20. At this time, the opening degree of the hydrogen supply regulating valve 51 is linked to the hydrogen pressure to ensure a constant hydrogen pressure. The hydrogen supply regulating valve 51 is also interlocked with the pressure of the first storage tank 20. When the pressure of the first storage tank 20 approaches the hydrogen pressure (the difference between the two does not exceed 0.05 MPa), the hydrogen supply regulating valve 51 fully opens and disconnects from the pipeline hydrogen pressure.

[0121] Simultaneously, the system automatically opens the first liquid phase valve 221 at the bottom of the first storage tank 20, as well as the bypass valve 61 and the fourth liquid phase valve 321 at the bottom of the second storage tank 30. Water in the first storage tank 20 then flows out under hydrogen pressure through the first liquid phase pipeline 22 at the bottom, and after passing through the control valve 80, enters the second storage tank 30 through the bypass pipeline 60 and the fourth liquid phase pipeline 32 at the bottom of the second storage tank 30.

[0122] When the liquid level in the first storage tank 20 gradually decreases to zero while the liquid level in the second storage tank 30 gradually increases from zero to a predetermined near-full level, the water in the first storage tank 20 is completely transferred to the second storage tank 30. At this point, the inflation of the first storage tank 20 ends, and the system can automatically stop inflation of the first storage tank 20 according to the changes in the liquid levels of the first storage tank 20 and the second storage tank 30.

[0123] It is understandable that during the gas filling process of the first storage tank 20, the opening degree of the water inlet regulating valve 52 is related to the hydrogen pressure. The water inlet regulating valve 52 can control the water flow rate entering the second storage tank 30, thereby controlling the flow rate of hydrogen received by the first storage tank 20, thus ensuring that the hydrogen pressure is constant.

[0124] 2. Energy recovery inflation mode

[0125] like Figure 3 As shown, the system includes four storage tanks, with each pair of tanks forming a group. Each group includes a first storage tank 20 and a second storage tank 30. Taking one group of first storage tanks 20 and second storage tanks 30 as an example:

[0126] When the hydrogen production equipment 10 operates at full load (with a large number of electrolyzers running) or at a high load, the generated hydrogen exceeds the downstream hydrogen consumption flow, at which point the system enters the charging stage. The hydrogen production equipment 10 charges the first storage tank 20 with hydrogen through the storage pipeline 11 and the gas phase pipeline 21 at the top of the first storage tank 20. At this time, the opening degree of the hydrogen supply regulating valve 51 is linked to the hydrogen pressure to ensure a constant hydrogen pressure. The hydrogen supply regulating valve 51 is also interlocked with the pressure of the first storage tank 20. When the pressure of the first storage tank 20 approaches the hydrogen pressure (the difference between the two does not exceed 0.05 MPa), the hydrogen supply regulating valve 51 fully opens and disconnects from the pipeline hydrogen pressure.

[0127] Simultaneously, the system automatically starts the power unit 40, that is, starts the reversible water pump turbine and puts it into turbine operation mode. Water in the first storage tank 20 then flows out through the bottom second liquid phase pipeline 23 under hydrogen pressure, and enters the reversible water pump turbine to generate electricity. Water depressurized by the reversible water pump turbine enters the second storage tank 30 through the bottom third liquid phase pipeline 31.

[0128] When the liquid level in the first storage tank 20 gradually decreases to zero while the liquid level in the second storage tank 30 gradually increases from zero to a predetermined near-full level, the water in the first storage tank 20 is completely transferred to the second storage tank 30. At this point, the inflation of the first storage tank 20 ends, and the system can automatically stop inflation of the first storage tank 20 according to the changes in the liquid levels of the first storage tank 20 and the second storage tank 30.

[0129] During the process of filling the first storage tank 20 with gas, the water inlet regulating valve 52 is fully open. At this time, the operation of the reversible water pump turbine can be controlled, for example, by adjusting the opening of the turbine's inlet guide vanes, to regulate the water flow into the second storage tank 30, thereby controlling the flow of hydrogen received by the first storage tank 20 to ensure that the hydrogen pressure is constant.

[0130] 3. Gas supply conditions

[0131] like Figure 4 As shown, the system includes four storage tanks, with each pair of tanks forming a group. Each group includes a first storage tank 20 and a second storage tank 30. Taking one group of first storage tanks 20 and second storage tanks 30 as an example:

[0132] When the hydrogen production equipment 10 is under low load (reducing the number of electrolyzers in operation) or stops working, the amount of hydrogen produced is lower than the downstream hydrogen consumption flow rate, and the system will enter the gas supply stage.

[0133] The system automatically starts the power unit 40, such as a regular water pump or a reversible water pump turbine. The following description uses a reversible water pump turbine. The reversible water pump turbine enters pump operation mode and simultaneously closes the control valve 80. Water in the second storage tank 30 then enters the gas-liquid separator 70 via the bottom third liquid phase pipeline 31 for water-gas separation. The separated water enters the reversible water pump turbine, and after being pressurized by the reversible water pump turbine, it enters the first storage tank 20 via the inlet regulating valve 52 and the bottom second liquid phase pipeline 23. Hydrogen gas in the first storage tank 20 is forced out through the top gas phase pipeline 21 and flows into the storage pipeline 11 to be supplied to the downstream hydrogen-using equipment 10.

[0134] When the liquid level in the second storage tank 30 gradually decreases to zero while the liquid level in the first storage tank 20 gradually increases from zero to near full level, the water in the second storage tank 30 is completely transferred to the first storage tank 20, and all the hydrogen gas in the first storage tank 20 is discharged. At this point, the venting of the first storage tank 20 ends. Simultaneously, the system can automatically stop the venting of the first storage tank 20 based on the changes in the liquid levels of the first and second storage tanks 20.

[0135] It is understandable that during the gas supply process of the first storage tank 20, the opening degree of the water inlet regulating valve 52 is related to the hydrogen pressure. The water inlet regulating valve 52 can control the water flow into the first storage tank 20 and thus control the gas supply of the first storage tank 20, thereby ensuring that the hydrogen pressure is constant.

[0136] It should be noted that, under gas supply conditions, in addition to using the inlet regulating valve 52 to regulate the gas supply, the load can also be adjusted by using frequency conversion speed regulation to adjust the speed of the reversible water pump turbine according to the downstream hydrogen consumption, so as to control the water flow into the first storage tank 20 and thus control the gas supply of the first storage tank 20.

[0137] It is understood that in other embodiments, the system may also have the following liquid-free pneumatic charging conditions:

[0138] See Figure 5 The system includes four storage tanks, with each pair of tanks forming a group. Each group of tanks includes a first storage tank 20 and a second storage tank 30. When the hydrogen production equipment 10 is operating at full load (with a large number of electrolyzers running) or at a high load, the generated hydrogen exceeds the downstream hydrogen consumption flow rate, at which point the system will enter the charging stage.

[0139] When the hydrogen storage capacity is large and the hydrogen storage rate is fast, in order to reduce the hydrogen heat generation during hydrogen storage and the slow heat dissipation of the outer surface of the storage tank, the hydrogen temperature rise may exceed the allowable range. Depending on the specific circumstances, one or more second storage tanks 30 can be introduced to reduce the hydrogen temperature rise.

[0140] For example, see Figure 5 The hydrogen production equipment 10 can simultaneously introduce hydrogen into two second storage tanks 30. Specifically, each second storage tank 30 can be connected to a second gas phase pipeline 33 at its top, and each second gas phase pipeline 33 is connected to the storage pipeline 11. A second gas phase valve 331 can be installed on the second gas phase pipeline 33. This allows hydrogen to be directly introduced into each second storage tank 30 as needed.

[0141] Under this operating condition, both the hydrogen supply regulating valve 51 and the second gas phase valves 331 at the top of the two second storage tanks 30 are open, while all other valves in the system are closed. The opening degree of the hydrogen supply regulating valve 51 is related to the hydrogen pressure to ensure a constant hydrogen pressure. The hydrogen supply regulating valve 51 is also interlocked with the pressure of the two second storage tanks 30. When the pressure in the two second storage tanks 30 approaches the hydrogen pressure, the hydrogen supply regulating valve 51 closes, and the filling of the two second storage tanks 30 ends.

[0142] The hydrogen storage and supply device and system of this application embodiment utilizes the hydrogen pressure of the hydrogen production equipment 10 to fill the first storage tank 20. Simultaneously, water is used as the flow medium, allowing water to enter the second storage tank 30 during the filling of the first storage tank 20. With the adjustment function of the regulating device 50, pressure balance can be achieved during the filling process. Furthermore, the system uses a power unit 40 as the power source, with water as the driving medium to transfer water from the second storage tank 30 to the first storage tank 20, enabling the hydrogen in the first storage tank 20 to be supplied externally while maintaining pressure balance during the supply process. Therefore, the system's storage and supply process does not require the use of an expensive hydrogen compressor, resulting in better safety, lower power consumption, higher reliability, and a significant reduction in cost.

[0143] Furthermore, the amount of hydrogen residue in the first storage tank 20 is small during each filling and venting process, resulting in higher tank utilization and saving on tank investment costs.

[0144] The hydrogen storage and supply device and system of this application embodiment, by setting an adjustment device 50, can adjust the flow rate of hydrogen received by the first storage tank 20 or the exhaust volume, thereby ensuring that the pressure of each storage tank and the entire system is constant, ensuring the stability of the pipeline hydrogen pressure, and reducing pressure periodic fluctuations.

[0145] The hydrogen storage and supply device and system of the present application embodiment can effectively recover the pressure energy of the hydrogen filling process by using an inverter water pump / turbine when the scale of hydrogen storage and transportation is large, thereby improving the system energy utilization rate.

[0146] In the hydrogen storage and supply device and system of this application embodiment, the first storage tank 20 and the second storage tank 30 are interconnected by a pipeline, allowing water to flow between the two tanks. Because the water flows within a closed pipeline, it does not come into contact with air, effectively preventing corrosion of the inner walls of the first storage tank 20 or the second storage tank 30 and extending the service life of the tanks.

[0147] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0148] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A hydrogen storage and supply device, characterized in that, include: Storage pipelines are used to connect to hydrogen production equipment to receive hydrogen. A first storage tank and a second storage tank are connected by a storage pipeline, wherein the first storage tank contains pre-stored water; A power unit is installed between the first storage tank and the second storage tank; An adjustment device is installed on a pipeline connected to the first storage tank and / or the second storage tank; The first storage tank has a gas storage mode and a gas supply mode. In the gas storage mode, the first storage tank receives and stores hydrogen from the hydrogen production equipment and transfers water to the second storage tank. In the gas supply mode, the water in the second storage tank is transferred by the power unit to the first storage tank to discharge hydrogen for gas supply; wherein, the regulating device is used to regulate the flow rate of hydrogen received by the first storage tank or the discharge volume.

2. The hydrogen storage and supply device according to claim 1, characterized in that, The regulating device includes a hydrogen supply regulating valve, which is installed on the storage pipeline. The hydrogen supply regulating valve is used to regulate the flow rate of hydrogen entering the first storage tank according to the pipeline network pressure of the storage pipeline and the pressure of the first storage tank.

3. The hydrogen storage and supply device according to claim 1, characterized in that, The regulating device includes an inlet regulating valve, which is installed on a pipeline that is connected to both the first storage tank and the second storage tank; The inlet regulating valve is used to control the water flow rate entering the second storage tank according to the pipeline network pressure of the storage pipeline, so as to regulate the flow rate of hydrogen received by the first storage tank. or, The inlet regulating valve is used to control the water flow rate entering the first storage tank according to the pipeline network pressure of the storage pipeline, so as to regulate the venting volume of the first storage tank.

4. The hydrogen storage and supply device according to claim 1, characterized in that, The device includes a speed regulator electrically connected to the power unit, which can adjust the operation of the power unit according to the downstream hydrogen consumption to regulate the water flow into the first storage tank, thereby regulating the exhaust volume of the first storage tank.

5. The hydrogen storage and supply device according to claim 1, characterized in that, The power unit is a reversible water pump turbine. When the first storage tank receives and stores hydrogen from the hydrogen production equipment and transfers water to the second storage tank, the power unit can generate electricity using water.

6. The hydrogen storage and supply device according to claim 5, characterized in that, The reversible pump-turbine is equipped with an inlet guide vane with an adjustable opening. The reversible pump-turbine can control the opening of the inlet guide vane according to the pipeline pressure of the storage pipeline to adjust the water flow rate entering the second storage tank, thereby adjusting the flow rate of hydrogen received by the first storage tank.

7. The hydrogen storage and supply device according to claim 1, characterized in that, Includes a bypass pipeline, which is connected between the first storage tank and the second storage tank and is configured in parallel with the power unit. When the first storage tank receives and stores hydrogen from the hydrogen production equipment, the water in the first storage tank can enter the second storage tank through the bypass pipeline. A bypass valve is provided on the bypass pipeline, and the bypass valve is used to control the opening and closing of the bypass pipeline.

8. The hydrogen storage and supply device according to any one of claims 1 to 7, characterized in that, The device includes a gas-liquid separator, which is installed between the first storage tank and the second storage tank and connected in series with the power unit. The gas-liquid separator is used to separate water and gas in the water transferred to the first storage tank.

9. The hydrogen storage and supply device according to claim 8, characterized in that, It includes an inlet regulating valve, which is located at the inlet of the gas-liquid separator and is used to control the water flow rate entering the gas-liquid separator according to the liquid level of the gas-liquid separator.

10. The hydrogen storage and supply device according to claim 8, characterized in that, It includes an airbag, which is connected to the gas outlet of the gas-liquid separator.

11. The hydrogen storage and supply device according to any one of claims 1 to 6, characterized in that, The top of the first storage tank is connected to a gas phase pipeline, which is connected to the hydrogen production equipment, and a gas phase valve is installed on the gas phase pipeline; The bottom of the first storage tank is connected to a first liquid phase pipeline and a second liquid phase pipeline, respectively. The first liquid phase pipeline is equipped with a first liquid phase valve, and the second liquid phase pipeline is equipped with a second liquid phase valve. The bottom of the second storage tank is connected to a third liquid phase pipeline and a fourth liquid phase pipeline. The third liquid phase pipeline is connected to the second liquid phase pipeline, and the fourth liquid phase pipeline is connected to the first liquid phase pipeline. A third liquid phase valve is provided on the third liquid phase pipeline, and a fourth liquid phase valve is provided on the fourth liquid phase pipeline.

12. A hydrogen storage and supply device, characterized in that, include: Storage pipelines are used to connect to hydrogen production equipment to receive hydrogen. Multiple storage tanks, including at least one pair of first and second storage tanks, both the first and second storage tanks being connected to the storage pipeline, wherein the first storage tank contains pre-stored water; A power unit is installed between the first storage tank and the second storage tank; An adjustment device is installed on a pipeline connected to the first storage tank and / or the second storage tank; Each of the first storage tanks has a gas storage mode and a gas supply mode. In the gas storage mode, the first storage tank receives and stores hydrogen from the hydrogen production equipment and transfers water to the second storage tank. In the gas supply mode, the water in the second storage tank is transferred by the power unit to the first storage tank to discharge hydrogen for gas supply; wherein, the regulating device is used to regulate the flow rate of hydrogen received by the first storage tank or the discharge volume.

13. A hydrogen storage and supply system, characterized in that, The device includes a hydrogen production equipment and a hydrogen storage and supply device as described in any one of claims 1-12, wherein the storage pipeline is connected to the outlet end of the hydrogen production equipment. The outlet of the hydrogen production equipment is also connected to a hydrogen use pipeline, which is arranged in parallel with the storage pipeline. The hydrogen supplied by the first storage tank flows into the hydrogen use pipeline.

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