Hydrogen compression and supply device, system

Abstract

The utility model relates to a kind of hydrogen compression and gas supply device, system.Hydrogen compression and gas supply device includes hydrogen pipeline, at least four pressure vessels, power mechanism and output pipeline.Hydrogen pipeline is used to connect hydrogen production equipment.At least four pressure vessels are connected with hydrogen pipeline respectively, and each pressure vessel is stored with hydrogen and / or water with predetermined pressure and proportion.Power mechanism is arranged between the pressure vessel of water storage and the pressure vessel of hydrogen storage.Output pipeline is connected with at least four pressure vessels respectively.The device has compression process and gas supply process, and compression process and gas supply process can be carried out simultaneously.The device realizes the simultaneous performance of hydrogen compression and gas supply process, and hydrogen compression and gas supply process do not need to use expensive hydrogen compressor, which is safer, lower in power consumption, higher in reliability and significantly lower in cost.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen compression technology, and in particular to a hydrogen compression 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 hydrogen 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.

[0004] Furthermore, in scenarios involving the production of green liquid fuels (such as methanol or synthetic ammonia) from green hydrogen, the process synthesis pressure is relatively high, necessitating further pressurization of the hydrogen. Additionally, to reduce floor space and save investment, hydrogen is sometimes further pressurized to higher pressures before storage. Due to the small molecular weight of hydrogen, centrifugal compressors are difficult to use; reciprocating hydrogen compressors are typically employed for compression. Because hydrogen is difficult to compress, has a small molecular weight that makes it prone to leakage, a wide explosive range, poor safety, and hydrogen embrittlement, existing hydrogen compression equipment using compressors suffers from high investment costs, high energy consumption, and poor safety. Utility Model Content

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

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

[0007] Hydrogen pipeline, used to connect to hydrogen production equipment to receive low-pressure hydrogen produced by the equipment;

[0008] At least four pressure vessels are connected to hydrogen pipelines, and each pressure vessel stores hydrogen and / or water at a predetermined pressure and proportion.

[0009] The power unit is located between the water storage pressure vessel and the hydrogen storage pressure vessel;

[0010] The output pipeline is connected to at least four pressure vessels respectively;

[0011] The device has a compression process and a gas supply process. During the compression process, the water in the water storage pressure vessel can be transferred to each hydrogen storage pressure vessel through the power mechanism to compress the hydrogen in each hydrogen storage pressure vessel to a predetermined pressure.

[0012] During the gas supply process, when any predetermined pressure reaches the preset hydrogen supply pressure or any other pressure vessel reaches the preset hydrogen supply pressure, water is transferred into the corresponding pressure vessel through the power mechanism so that the pressure vessel can supply hydrogen to the outside through the output pipeline.

[0013] The compression process and the gas supply process can be carried out simultaneously.

[0014] In one embodiment, the device has a multi-stage compression process, wherein before any predetermined pressure reaches the hydrogen delivery pressure, the power mechanism can transfer water into the pressure vessel at that predetermined pressure to perform the next stage of compression process on the pressure vessel.

[0015] In one embodiment, the power mechanism includes at least two water supply lines arranged in parallel, each with a different water supply pressure.

[0016] Among them, the water supply pipeline with higher water pressure is used to transfer water to the pressure vessel with higher hydrogen pressure.

[0017] In one embodiment, the power mechanism includes at least two power components, each with a different working pressure, and each power component is respectively installed on each water supply pipeline.

[0018] In one embodiment, each pressure vessel is connected to a water inlet pipe, the number of water inlet pipes configured on each pressure vessel corresponds to the number of water supply pipes, each water inlet pipe of each pressure vessel is connected to each water supply pipe, and each water inlet pipe is provided with a water inlet valve.

[0019] In one embodiment, while the water in each water storage pressure vessel is transferred via a power mechanism, each water storage pressure vessel can receive hydrogen through a hydrogen pipeline. In one embodiment, each pressure vessel is connected to an independent inlet pipeline and an outlet pipeline, with each inlet pipeline connected to a hydrogen pipeline and each outlet pipeline connected to an outlet pipeline.

[0020] Each air intake pipe is equipped with an air intake valve, and each air outlet pipe is equipped with an air outlet valve.

[0021] In one embodiment, each pressure vessel is connected to a drain pipe, and the drain pipe of each pressure vessel is connected to the water inlet of the power mechanism. Each drain pipe is equipped with a drain valve.

[0022] In one embodiment, the apparatus includes a pressure equalization valve disposed between any two pressure vessels, the pressure equalization valve being used to balance the gas phase pressure of the two pressure vessels.

[0023] In one embodiment, the device includes a heat exchanger disposed between any two pressure vessels and connected in series with a power mechanism, the heat exchanger being used to exchange heat on water transferred between the two pressure vessels.

[0024] In one embodiment, the device includes a gas-liquid separator disposed between any two pressure vessels and connected in series with a power mechanism. The gas-liquid separator is used to separate water and gas in water transferred between any two pressure vessels.

[0025] Another objective of this utility model is to provide a hydrogen compression and supply system, including a hydrogen production device and the hydrogen compression and supply device described in any of the above, wherein a hydrogen pipeline is connected to the outlet end of the hydrogen production device.

[0026] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0027] In this invention, the hydrogen compression and supply device includes a hydrogen pipeline, at least four pressure vessels, a power mechanism, and an output pipeline. The hydrogen pipeline is used to connect to hydrogen production equipment. The at least four pressure vessels are respectively connected to the hydrogen pipeline, and each pressure vessel stores hydrogen and / or water at a predetermined pressure and proportion. The power mechanism is located between the water-storing pressure vessel and the hydrogen-storing pressure vessel. The output pipeline is connected to each of the at least four pressure vessels.

[0028] This device is driven by a power mechanism and compresses low-pressure hydrogen gas inside a closed pressure vessel by injecting water into it. Furthermore, driven by the power mechanism and using water as the working medium, the compressed hydrogen gas can be transported to downstream equipment, thus achieving simultaneous hydrogen compression and supply. This device eliminates the need for expensive hydrogen compressors for both compression and supply, resulting in improved safety, lower power consumption, higher reliability, and significantly reduced costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a hydrogen compression and supply device according to an embodiment of the present invention.

[0030] Figure 2This is a schematic diagram of the operation process of a hydrogen compression and supply device according to an embodiment of the present invention, which includes four pressure vessels.

[0031] Figure 3 yes Figure 2 The diagram shows the process flow after the device completes one compression and gas supply cycle.

[0032] Figure 4 This is a schematic diagram of the operation process of a hydrogen compression and supply device according to another embodiment of the present invention, which includes 6 pressure vessels.

[0033] Figure 5 yes Figure 4 The diagram shows the process flow after the device completes one compression and gas supply cycle.

[0034] Figure 6 yes Figure 4 The diagram shows the process flow after the device has undergone two compression and gas supply processes.

[0035] The annotations in the attached figures are explained as follows:

[0036] 100 - Hydrogen production equipment; 200 - Downstream equipment;

[0037] 10-Hydrogen pipeline;

[0038] 20-Pressure vessel; 21-Inlet pipe; 211-Inlet valve; 22-Water inlet pipe; 221-Water inlet valve; 23-Outlet pipe; 231-Outlet valve; 24-Drain pipe; 241-Drain valve; 25-Main drain pipe;

[0039] 30 - Power mechanism; 31 - Water supply pipeline; 32 - Power components;

[0040] 40 - Output pipeline;

[0041] 50 - Pressure equalizing valve; 60 - Heat exchanger; 70 - Gas-liquid separator. Detailed Implementation

[0042] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0043] 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.

[0044] 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.

[0045] Please see Figure 1 As shown, this application provides a hydrogen compression and supply system, including a hydrogen production device 100 and a hydrogen compression and supply apparatus (hereinafter referred to as the apparatus). The hydrogen production device 100 is used to produce hydrogen. For example, the hydrogen production device 100 can be a water electrolysis hydrogen production device, which can utilize renewable electricity to produce hydrogen. For example, the renewable electricity can be wind power, hydropower, or solar power, etc.

[0046] The number of hydrogen production devices 100 can be one or more. When there are multiple hydrogen production devices 100, they are connected in parallel.

[0047] like Figure 1 As shown, the device includes a hydrogen pipeline 10, which is connected to the outlet end of the hydrogen production equipment 100 to receive low-pressure hydrogen produced by the hydrogen production equipment 100.

[0048] Typically, the hydrogen produced by the hydrogen production unit 100 is at a pressure of approximately 1.6 MPa. When the downstream equipment 200 requires a hydrogen pressure greater than 1.6 MPa, for example, if the downstream hydrogen-consuming equipment requires a hydrogen pressure of 2.4 MPa or 4.8 MPa or higher, the hydrogen produced by the hydrogen production unit 100 needs to be pressurized before being supplied to the hydrogen-consuming equipment. The downstream equipment 200 can refer to chemical equipment such as ammonia synthesis or methanol synthesis equipment. Alternatively, the downstream equipment 200 can also be a high-pressure hydrogen storage device.

[0049] The apparatus proposed in this application is mainly used to pressurize the low-pressure hydrogen produced by the hydrogen production equipment 100 (hereinafter referred to as low-pressure hydrogen) and supply the hydrogen to the downstream equipment 200 at the required pressure. The specific embodiments of the hydrogen compression and supply apparatus of this application will be described in detail below with reference to the accompanying drawings.

[0050] See Figure 1 The hydrogen compression and supply device of this application includes a hydrogen pipeline 10, at least four pressure vessels 20 connected to the hydrogen pipeline 10, a power mechanism 30, and an output pipeline 40.

[0051] like Figure 1 As shown, the inlet end of the hydrogen pipeline 10 is connected to the hydrogen production equipment 100 to receive the low-pressure hydrogen produced by the hydrogen production equipment 100. The outlet end of the hydrogen pipeline 10 is connected to each pressure vessel 20, so that the low-pressure hydrogen produced by the hydrogen production equipment 100 can enter each pressure vessel 20 through the hydrogen pipeline 10.

[0052] Each pressure vessel 20 can be a spherical tank, a cylindrical tank, or a high-pressure pipe bundle, etc.

[0053] See Figure 1 In one embodiment, each pressure vessel 20 is connected to an inlet pipe 21, and each inlet pipe 21 is connected to a hydrogen pipeline 10. Thus, the hydrogen production equipment 100 can fill the corresponding pressure vessel 20 with low-pressure hydrogen through the hydrogen pipeline 10 and each inlet pipe 21.

[0054] Each inlet pipe 21 is equipped with an inlet valve 211. The inlet valve 211 can be a one-way valve or a check valve. When the inlet valve 211 is open, only low-pressure hydrogen is allowed to flow into the pressure vessel 20. When the inlet valve 211 is closed, low-pressure hydrogen cannot enter the pressure vessel 20. It is understood that in other embodiments, the inlet valve 211 can also be a one-way regulating valve, which can adjust the flow rate of hydrogen entering the pressure vessel 20 as needed.

[0055] See Figure 1 In the embodiments of this application, each pressure vessel 20 stores hydrogen and / or water at a predetermined pressure and proportion. For example, taking a device comprising four pressure vessels 20, when the device starts operating, the initial state of each pressure vessel 20 can be as follows: one pressure vessel 20 is filled with water at a pressure of 1.6 MPa; another pressure vessel 20 is filled with hydrogen at a pressure of 1.6 MPa; another pressure vessel 20 is filled with half hydrogen and half water at a pressure of 2.4 MPa; and the last pressure vessel 20 is filled with half water and half hydrogen at a pressure of 1.6 MPa. The specific configuration can be adjusted according to actual needs.

[0056] It is understood that in other embodiments, such as when the device is not delivered or not in operation, each pressure vessel 20 may be empty. Before the device starts operating, water can be filled into each pressure vessel 20 at a predetermined pressure and ratio through an external water supply device, and hydrogen can be filled into each pressure vessel 20 at a predetermined pressure and ratio through the hydrogen pipeline 10 or the hydrogen storage system.

[0057] See Figure 1 As shown in the embodiment of this application, the power mechanism 30 is disposed between the water storage pressure vessel 20 and the hydrogen storage pressure vessel 20. The power mechanism 30 is mainly used to provide the power to transfer water between the two pressure vessels 20.

[0058] For example, each pressure vessel 20 is connected to a drain pipe 24, and each drain pipe 24 of the pressure vessel 20 is connected to the water inlet of the power mechanism 30. The inlet of each drain pipe 24 of the pressure vessel 20 can be connected to the corresponding pressure vessel 20, and the outlet of each drain pipe 24 of the pressure vessel 20 can be connected to a main drain pipe 25, through which the main drain pipe 25 is connected to the water inlet of the power mechanism 30.

[0059] Alternatively, in other embodiments, the drain pipes 24 of each pressure vessel 20 may also be connected to the water inlet of the power mechanism 30.

[0060] like Figure 1 As shown, each drainage pipe 24 is equipped with a drain valve 241. The drain valve 241 can be a one-way valve, allowing only water to drain from the corresponding pressure vessel 20. Alternatively, in other embodiments, the drain valve 241 can be a one-way regulating valve to adjust the water flow rate discharged from the pressure vessel 20 as needed.

[0061] In one embodiment, the power unit 30 includes at least two water supply pipes 31 arranged in parallel. For example, the inlet of each water supply pipe 31 can be connected to a main drain pipe 25, and the outlet of each water supply pipe 31 can be connected to a respective pressure vessel 20. Thus, by providing at least two water supply pipes 31, each water supply pipe 31 can transfer water into each pressure vessel 20, thereby achieving the purpose of compressing hydrogen in one or more pressure vessels 20 while simultaneously pushing hydrogen from another pressure vessel 20 to the outside at a preset hydrogen delivery pressure.

[0062] The water supply pressure of each water supply pipe 31 is different. For clarity, the water supply pipes 31 with different water supply pressures are labeled separately. For example, refer to... Figure 2As shown, the water supply line 31a, which supplies water to the pressure vessel 20 containing low-pressure hydrogen, can have a lower water supply pressure. The water supply line 31b, with a higher water supply pressure, can be used to transfer water to the pressure vessel 20 with a higher hydrogen pressure. Optionally, the water supply pressure of one of the water supply lines 31b can be no less than the hydrogen delivery pressure, in order to push the hydrogen gas in the pressure vessel 20, which has reached a preset hydrogen delivery pressure, outwards.

[0063] like Figure 1 As shown, in one embodiment, the power mechanism 30 includes at least two power members 32, each with a different operating pressure. For clarity, the power members 32 with different operating pressures are identified separately. That is, referring to... Figure 2 As shown, at least two power components 32 include a power component 32b with a relatively high working pressure and a power component 32a with a relatively low working pressure. Each power component 32 can be a water pump.

[0064] like Figure 1 As shown, each power component 32 is installed on each water supply pipeline 31. Thus, each power component 32 can transfer water to each pressure vessel 20 at different water supply pressures through each water supply pipeline 31. This configuration is relatively simple, easy to operate, and helps to save costs.

[0065] See Figure 1 In one embodiment, each pressure vessel 20 is connected to a water inlet pipe 22, and the number of water inlet pipes 22 configured on each pressure vessel 20 corresponds to the number of water supply pipes 31. Each water inlet pipe 22 of each pressure vessel 20 is connected to a respective water supply pipe 31. Thus, when a pressure vessel 20 is in different states, water can be introduced into it through different water inlet pipes 22 and water supply pipes 31 to achieve the compression, recompression, or exhaust process of the gas inside the pressure vessel 20.

[0066] like Figure 1 As shown, each water inlet pipe 22 is equipped with an inlet valve 221. The inlet valve 221 can be a one-way valve to allow only water to enter the corresponding pressure vessel 20. Alternatively, in other embodiments, the inlet valve 221 can be a one-way regulating valve to adjust the water flow rate into the corresponding pressure vessel 20 as needed.

[0067] Optionally, several water inlet pipes 22 are connected to each pressure vessel 20, with one water inlet pipe 22 connected to the bottom of the pressure vessel 20 and others connected to the top of the pressure vessel 20. For example... Figure 1As shown, the water inlet pipe 22 connected to the bottom of the pressure vessel 20 can be connected to the water supply pipe 31 with a higher water supply pressure. Water can then be introduced into the bottom of the pressure vessel 20 through the water supply pipe 31 and the water inlet pipe 22, so as to push the hydrogen gas in the pressure vessel 20 to the outside at the preset hydrogen delivery pressure.

[0068] like Figure 1 As shown, the water inlet pipe 22 connected to the top of the pressure vessel 20 can be connected to the water supply pipe 31 with a lower water supply pressure. Water can then be supplied to the top of the pressure vessel 20 through the corresponding water supply pipe 31 and water inlet pipe 22. This allows the hydrogen gas inside the pressure vessel 20 to be compressed, and also enables heat transfer between the water and the gas phase inside the pressure vessel 20. This effectively prevents the temperature rise caused by pressure changes inside the pressure vessel 20 from exceeding the limit, ensuring that the internal temperature of the pressure vessel 20 is maintained within a reasonable range during the hydrogen compression process.

[0069] like Figure 1 As shown, in an embodiment of this application, the output pipeline 40 is connected to at least four pressure vessels 20 to receive and supply compressed hydrogen gas to downstream applications at a preset hydrogen supply pressure. For example, each pressure vessel 20 is connected to an outlet pipeline 23, and each outlet pipeline 23 is connected to the output pipeline 40. Thus, each pressure vessel 20 can supply hydrogen gas at the pressure required by the hydrogen-using equipment through its corresponding outlet pipeline 23 and output pipeline 40. The outlet pipeline 23 and inlet pipeline 21 on each pressure vessel 20 are independently configured.

[0070] like Figure 1 As shown, each outlet pipeline 23 is equipped with an outlet valve 231. The outlet valve 231 can be a one-way valve or a check valve. When the outlet valve 231 is open, only the compressed hydrogen gas in the pressure vessel 20 is allowed to flow to the outlet pipeline 40. When the outlet valve 231 is closed, the compressed hydrogen gas cannot flow to the outlet pipeline 40.

[0071] It is understood that in other embodiments, the outlet valve 231 may also be a one-way regulating valve, which can adjust the flow rate of hydrogen discharged from the pressure vessel 20 as needed.

[0072] See Figures 2 to 6 As shown, in this application, the device has at least one compression process and one gas supply process. For example, as... Figure 2 and Figure 3 As shown, in one embodiment, the device has a primary compression process and a gas supply process. In the primary compression process, water in the water storage pressure vessel 20 can be transferred to each hydrogen storage pressure vessel 20 via the power mechanism 30, so as to compress the hydrogen in each hydrogen storage pressure vessel 20 to a predetermined pressure.

[0073] It is worth noting that if the compressed hydrogen pressure in any hydrogen storage pressure vessel 20 after this first-stage compression process can meet the hydrogen demand of the downstream equipment 200, then the power unit 30 can transfer water into the pressure vessel 20 so that it can supply hydrogen to the outside through the output pipeline 40. That is, the device can operate the gas supply process.

[0074] like Figure 2 As shown, during the gas supply process, when any predetermined pressure reaches the preset hydrogen delivery pressure, water is transferred into the pressure vessel 20 at that predetermined pressure via the power mechanism 30 so that the pressure vessel 20 can supply hydrogen to the outside through the output pipeline 40. It can be understood that the preset hydrogen delivery pressure can be the hydrogen pressure required by the downstream equipment 200.

[0075] Alternatively, while any hydrogen storage pressure vessel 20 is undergoing the first-stage compression process described above, if any other pressure vessel 20 reaches the preset hydrogen supply pressure, the power unit 30 can transfer water into the corresponding pressure vessel 20 so that the pressure vessel 20 can supply hydrogen to the outside. That is, the device can simultaneously perform the first-stage compression process and the gas supply process described above.

[0076] Optionally, while the water in each water storage pressure vessel 20 is transferred via the power mechanism 30, each water storage pressure vessel 30 can receive hydrogen through the hydrogen pipeline 10. This ensures that there is always a hydrogen storage pressure vessel 20 in the device, guaranteeing the continuity of device operation.

[0077] For example, such as Figure 2 and Figure 3 As shown, the device may include four pressure vessels 20, such as pressure vessels 20A, 20B, 20C, and 20D. One pressure vessel 20A is filled with low-pressure hydrogen, another pressure vessel 20C is filled with water, another pressure vessel 20B stores some water and hydrogen at a preset hydrogen delivery pressure, and the last pressure vessel 20D may store some water and low-pressure hydrogen.

[0078] When the device is running, the power mechanism 30 can transfer water in pressure vessels 20C and 20D to pressure vessels 20A and 20B, thereby compressing hydrogen in pressure vessel 20A and supplying hydrogen in pressure vessel 20B at a preset hydrogen supply pressure. For specific implementation details, please refer to the following description.

[0079] For another example, see Figures 4 to 6 As shown, in another embodiment, the device has a two-stage compression process and a gas supply process. For ease of description, in this application, the two-stage compression process will be referred to as the first-stage compression process and the second-stage compression process, respectively.

[0080] During the first stage of compression, the water in the water storage pressure vessel 20 can be transferred to each hydrogen storage pressure vessel 20 via the power mechanism 30, so as to compress the hydrogen in each hydrogen storage pressure vessel 20 to a predetermined pressure.

[0081] It is worth noting that if the compressed hydrogen pressure in any hydrogen storage pressure vessel 20 does not meet the hydrogen demand of the downstream equipment 200 after the first-stage compression process, the device can operate a second-stage compression process. That is, before any predetermined pressure reaches the hydrogen delivery pressure, the power unit 30 can transfer water into the pressure vessel 20 at the predetermined pressure to perform a second-stage compression process on the pressure vessel 20.

[0082] When the pressure vessel 20 at the predetermined pressure undergoes the second-stage compression process, if the compressed hydrogen pressure can meet the hydrogen demand of the downstream equipment 200, i.e., reach the hydrogen delivery pressure, then the power unit 30 can transfer water into the pressure vessel 20 so that it can supply hydrogen to the outside through the output pipeline 40. That is, the device can operate the gas supply process.

[0083] It is understood that while any hydrogen storage pressure vessel 20 is undergoing the first-stage compression process, if any other pressure vessel 20 reaches the preset hydrogen supply pressure, the power unit 30 can transfer water into that pressure vessel 20 so that it can supply hydrogen. Simultaneously, another pressure vessel 20 may be undergoing the second-stage compression process. That is, the device can simultaneously perform the first-stage compression process, the second-stage compression process, and the hydrogen supply process; specific implementation details can be found in the following description.

[0084] Optionally, while the water in each water storage pressure vessel 20 is transferred via the power mechanism 30, each water storage pressure vessel 30 can receive hydrogen through the hydrogen pipeline 10. This ensures that hydrogen storage pressure vessels 20 are always present in the device, guaranteeing the continuity of device operation.

[0085] It is understood that in other embodiments of this application, the device may also have two or more stages of compression process and gas supply process, which can be set according to actual needs.

[0086] See Figure 1 In one embodiment, the apparatus includes a pressure equalization valve 50 disposed between any two pressure vessels 20. The pressure equalization valve 50 is used to balance the gas phase pressure of any two pressure vessels 20.

[0087] Optionally, there can be multiple equalizing valves 50, each of which is installed on a pipeline connected to the interior of each pressure vessel 20. For example, each equalizing valve 50 can be installed on a pipeline connected to the air inlet pipeline 21 of each pressure vessel 20. Furthermore, the pipelines containing any two equalizing valves 50 can be interconnected.

[0088] In this embodiment, by setting a pressure equalization valve 50, the pressure equalization valve 50 can balance the gas phase pressure of any two pressure vessels 20. After the hydrogen gas in one pressure vessel 20 reaches the preset hydrogen delivery pressure and is discharged outward, the residual gas in the pressure vessel 20 is released into the other pressure vessel 20 through the pressure equalization valve 50. This allows for full utilization of the residual higher-pressure gas, which helps to reduce energy consumption.

[0089] See Figure 1 In one embodiment, the device includes a heat exchanger 60 disposed between any two pressure vessels 20 and connected in series with the power unit 30. For example, the heat exchanger 60 may be disposed on the drain manifold 25. The heat exchanger 60 is used to exchange heat on the water transferred between the two pressure vessels 20. Thus, by providing the heat exchanger 60, the water transferred between the two pressure vessels 20 can be cooled or heated as needed to ensure reliable operation of the device.

[0090] For example, when the drainage temperature of the water storage pressure vessel 20 is high, the water can be cooled down through the heat exchanger 60 to prevent high-temperature water from entering the pressure vessel 20 storing low-pressure hydrogen, which would increase the amount of hydrogen dissolved in the water. This helps reduce the amount of residual hydrogen and improve hydrogen utilization. Therefore, the heat exchanger 60 can cool the water transferred between any two pressure vessels 20. The purpose of cooling is to prevent the temperature of the circulating water from rising and to prevent a decrease in the utilization rate of the vessels due to increased water temperature.

[0091] Alternatively, if the project site is located in a northern region where winter temperatures are low, the inner surface of the water storage pressure vessel 20 may freeze, affecting its use. In this case, the water can be heated by the heat exchanger 60 to prevent the inner surface of the water storage pressure vessel 20 from freezing or melting, and to prevent the pipeline from freezing and becoming blocked.

[0092] See Figure 1 In one embodiment, the device includes a gas-liquid separator 70 disposed between any two pressure vessels 20 and connected in series with a power mechanism 30. For example, the gas-liquid separator 70 may be disposed on a drain manifold 25. The gas-liquid separator 70 is used to separate water and gas in water transferred between any two pressure vessels 20. In this embodiment, by providing the gas-liquid separator 70, the dissolved hydrogen in the water can be reduced, thereby improving the hydrogen compression efficiency and hydrogen utilization rate.

[0093] Optionally, an air bladder can be connected to the gas outlet of the gas-liquid separator 70. The air bladder can store a small amount of hydrogen separated by the gas-liquid separator 70, thereby maintaining a constant pressure in the gas-liquid separator 70 and preventing pressure fluctuations due to possible fluctuations in liquid level. This, in turn, ensures a constant pressure on the inlet side of each power component 32, i.e., each water pump, and ensures stable system operation.

[0094] See Figures 2 to 6 As shown in this application, to achieve continuous output of high-pressure hydrogen, four or more even-numbered pressure vessels 20 are required based on the pressure ratio. The pressure vessels 20 are staggered at different times to increase pressure at different levels, ensuring that at least one pressure vessel 20 can output high-pressure hydrogen. For example, a pressure ratio of 1 to 2 requires 4 pressure vessels 20, a pressure ratio of 2.1 to 3 requires 6 pressure vessels 20, and a pressure ratio of 3.1 to 4 requires 8 pressure vessels 20.

[0095] See Figure 2 and Figure 3 Taking a pressure vessel 20 with a pressure ratio of 1.5, meaning that it is pre-stored with low-pressure hydrogen (1.6 MPa) and can reach the hydrogen delivery pressure (2.4 MPa) after one stage of compression, as an example, the working process of a hydrogen compression and supply device according to an embodiment of this application is specifically described as follows:

[0096] In the accompanying diagrams, light blue lines with arrows represent the flow of low-pressure hydrogen, green lines with arrows represent the flow of lower-pressure water, dark blue lines with arrows represent the flow of higher-pressure water, and purple lines with arrows represent the flow of hydrogen at the transport pressure.

[0097] like Figure 2 As shown, the apparatus includes four pressure vessels: 20A, 20B, 20C, and 20D. It is assumed that initially, pressure vessel 20A is filled with hydrogen at a pressure of 1.6 MPa. Pressure vessel 20B is filled with half hydrogen and half water at a pressure of 2.4 MPa. Pressure vessel 20C is filled with water and is under a low pressure, for example, 1.6 MPa. Pressure vessel 20D is filled with half water and half hydrogen and is under a low pressure, for example, 1.6 MPa.

[0098] During operation, the low-pressure hydrogen produced by the hydrogen production equipment 100 is split into two streams and enters pressure vessels 20C and 20D through two inlet pipes 21, respectively. At the same time, the water in pressure vessels 20C and 20D, under the action of the power mechanism 30, enters the heat exchanger 60 through their respective drain pipes 24. After being cooled, the water enters the gas-liquid separator 70, and then enters pressure vessels 20A and 20B through two water supply pipes 31a and 31b, respectively.

[0099] The following example illustrates this using two power components 32a and 32b on two water supply pipes 31a and 31b, both of which are water pumps. For ease of explanation, the two water pumps will be referred to as high-pressure water pump 32b and low-pressure water pump 32a, respectively. Figure 2 As shown, one stream of water enters the low-pressure water pump 32a and is pressurized to a low pressure before entering the pressure vessel 20A, until the liquid level in the pressure vessel 20A reaches 1 / 2 of the total volume. Thus, the continuous injection of water gradually reduces the hydrogen space within the pressure vessel 20A, compressing the hydrogen gas; specifically, the hydrogen pressure within the pressure vessel 20A is compressed from 1.6 MPa to 2.4 MPa.

[0100] Another stream of water enters the high-pressure water pump 32b and then enters the pressure vessel 20B, which pushes the hydrogen gas with a pressure of 2.4 MPa inside the pressure vessel 20B into the output pipeline 40, thereby achieving the purpose of transporting hydrogen gas downstream at the preset hydrogen delivery pressure.

[0101] After the simultaneous primary compression and gas supply process, the states of each pressure vessel 20 become as follows: Pressure vessel 20A is filled with 1 / 2 hydrogen and 1 / 2 water, at a pressure of 2.4 MPa. Pressure vessel 20B is filled with water and is under low pressure. Pressure vessel 20C is filled with 1 / 2 water and 1 / 2 hydrogen and is under low pressure. Pressure vessel 20D is filled with low-pressure hydrogen, at a pressure of 1.6 MPa. (See reference...) Figure 3 As shown.

[0102] The first-stage compression and gas supply process described above can then be repeated, allowing pressure vessel 20A to supply hydrogen gas at a pressure of 2.4 MPa, and pressure vessel 20D to compress low-pressure hydrogen gas at a pressure of 1.6 MPa to 2.4 MPa, and so on. Through this cycle, the device can continuously compress low-pressure hydrogen gas to a preset hydrogen delivery pressure and continuously transport high-pressure hydrogen gas that has reached the preset delivery pressure downstream.

[0103] It should be noted that, before each repetition of the above-described primary compression and gas supply process—that is, before switching to compress the gas in the next pressure vessel 20 and supplying hydrogen that has reached the hydrogen delivery pressure in the next pressure vessel 20—the pressure equalization valve 50 of the corresponding pressure vessel 20 can be opened to equalize the pressure, in order to reduce energy consumption and to make full use of the remaining high-pressure gas. For example, as described above, when the low-pressure hydrogen in pressure vessel 20A is compressed to 2.4 MPa, and the hydrogen in pressure vessel 20B at a pressure of 2.4 MPa is exhausted, the pressure equalization valves 50 corresponding to pressure vessels 20B and 20A can be opened to release the residual gas in the gas space at the top of pressure vessel 20B (equivalent to the clearance volume of a conventional compressor) into pressure vessel 20A and equalize the pressure. Then, the pressure equalization valve 50 corresponding to pressure vessel 20A is closed, and the pressure equalization valve 50 corresponding to pressure vessel 20D, which is in a low-pressure state, is opened to equalize the pressure in pressure vessels 20B and 20D. Because the gas space at the top of pressure vessel 20B is small, the secondary pressure equalization process is extremely fast.

[0104] See Figures 4 to 6 Taking a pressure vessel 20 with a pressure of 3, i.e., pre-stored low-pressure hydrogen (1.6 MPa) in the device, as an example, which reaches the hydrogen delivery pressure (4.8 MPa) through two stages of compression, the working process of the hydrogen compression and supply device of another embodiment of this application is specifically described as follows:

[0105] In the accompanying diagrams, light blue lines with arrows represent the flow of low-pressure hydrogen, green lines with arrows represent the flow of lower-pressure water, dark blue lines with arrows represent the flow of higher-pressure water, yellow lines with arrows represent the flow of medium-pressure water, and purple lines with arrows represent the flow of hydrogen at the transport pressure.

[0106] like Figure 4 As shown, the apparatus includes six pressure vessels: 20A, 20B, 20C, 20D, 20E, and 20F. Assume that initially, pressure vessel 20A is filled with hydrogen at a pressure of 1.6 MPa. Pressure vessel 20B is filled with 2 / 3 hydrogen and 1 / 3 water at a pressure of 2.4 MPa. Pressure vessel 20C is filled with 1 / 3 hydrogen and 2 / 3 water at a pressure of 4.8 MPa. Pressure vessel 20D is filled with water and is under a low pressure, for example, 1.6 MPa. Pressure vessel 20E is filled with 2 / 3 water and 1 / 3 hydrogen and is under a low pressure, for example, 1.6 MPa. Pressure vessel 20F is filled with 1 / 3 water and 2 / 3 hydrogen and is under a low pressure, for example, 1.6 MPa.

[0107] During operation, the low-pressure hydrogen produced by the hydrogen production equipment 100 is divided into three streams and enters pressure vessels 20D, 20E, and 20F through three inlet pipes 21. Simultaneously, water in pressure vessels 20D, 20E, and 20F, under the action of the power mechanism 30, enters the heat exchanger 60 through its respective drain pipe 24. After being cooled, the water enters the gas-liquid separator 70, and then enters pressure vessels 20A, 20B, and 20C through three water supply pipes 31a, 31b, and 31c, respectively.

[0108] The following example uses three power components 32a, 32b, and 32c on three water supply pipelines 31a, 31b, and 31c as water pumps. For ease of explanation, the three water pumps will be referred to as high-pressure water pump 32c, medium-pressure water pump 32b, and low-pressure water pump 32a, respectively.

[0109] like Figure 4 As shown, one stream of water enters the low-pressure water pump 32a, is pressurized to a low pressure, and then enters the pressure vessel 20A until the liquid level in the pressure vessel 20A reaches 1 / 3 of the total volume. Thus, the continuous injection of water gradually reduces the space for hydrogen gas within the pressure vessel 20A, compressing the hydrogen gas. For example, the hydrogen pressure within the pressure vessel 20A is compressed from 1.6 MPa to 2.4 MPa. This is equivalent to the pressure vessel 20A undergoing the first stage of compression.

[0110] Another stream of water enters the medium-pressure water pump 32b, where it is pressurized to medium pressure before entering pressure vessel 20B until the liquid level in pressure vessel 20B reaches 2 / 3 of the total volume. As the water is injected, it continuously encroaches on the hydrogen space within pressure vessel 20B, compressing the hydrogen; that is, the hydrogen pressure within pressure vessel 20B is compressed from 2.4 MPa to 4.8 MPa. This is equivalent to pressure vessel 20B undergoing a second-stage compression process.

[0111] Finally, the water enters the high-pressure water pump 32c and then the pressure vessel 20C. This pressure vessel 20C then smoothly propels the hydrogen gas, at a pressure of 4.8 MPa, into the output pipeline 40, achieving the goal of delivering high-pressure hydrogen gas to the downstream at the preset hydrogen delivery pressure. Essentially, the pressure vessel 20C is in the process of supplying hydrogen.

[0112] See Figure 5 After the simultaneous first-stage compression, second-stage compression, and gas supply processes, the states of each pressure vessel 20 become as follows: Pressure vessel 20A is filled with 2 / 3 hydrogen and 1 / 3 water, at a pressure of 2.4 MPa. Pressure vessel 20B is filled with 1 / 3 hydrogen and 2 / 3 water, at a pressure of 4.8 MPa. Pressure vessel 20C is filled with water and is under low pressure. Pressure vessel 20D is filled with 2 / 3 water and 1 / 3 hydrogen and is under low pressure. Pressure vessel 20E is filled with 1 / 3 water and 2 / 3 hydrogen and is under low pressure. Pressure vessel 20F is filled with low-pressure hydrogen, at a pressure of 1.6 MPa.

[0113] Since the hydrogen pressure inside pressure vessel 20A did not reach the hydrogen delivery pressure of 4.8 MPa after the first-stage compression process, the device can continue to perform a second-stage compression process on pressure vessel 20A. Simultaneously, other corresponding pressure vessels 20 can be in the first-stage compression process and in the gas supply process. That is, the device can operate the next first-stage compression, second-stage compression, and gas supply process: the low-pressure hydrogen produced by the hydrogen production equipment 100 is divided into three paths and enters pressure vessels 20C, 20D, and 20E through three inlet pipes 21. At the same time, the water in pressure vessels 20C, 20D, and 20E enters the heat exchanger 60 through their respective drain pipes 24. After being cooled, the water enters the gas-liquid separator 70, and then enters the high-pressure water pump 32c, medium-pressure water pump 32b, and low-pressure water pump 32a for pressurization before entering pressure vessels 20B, 20A, and 20F respectively.

[0114] like Figure 5 and Figure 6 As shown, one stream of water enters the low-pressure water pump 32a, is pressurized to a low pressure, and then enters pressure vessel 20F until the liquid level in pressure vessel 20F reaches 1 / 3 of the total volume. The hydrogen pressure inside pressure vessel 20F is then compressed from 1.6 MPa to 2.4 MPa. Another stream of water enters the medium-pressure water pump 32b, is pressurized to a medium pressure, and then enters pressure vessel 20A until the liquid level in pressure vessel 20A reaches 2 / 3 of the total volume. The hydrogen pressure inside pressure vessel 20A is compressed from 2.4 MPa to 4.8 MPa. Finally, a stream of water enters the high-pressure water pump 32c and then enters pressure vessel 20B, smoothly pushing the hydrogen gas at a pressure of 4.8 MPa inside pressure vessel 20C into the output pipeline 40, thus achieving the purpose of transporting high-pressure hydrogen gas to the downstream at the preset hydrogen delivery pressure.

[0115] See Figure 6 After the simultaneous first-stage compression, second-stage compression, and gas supply processes, the states of each pressure vessel 20 become as follows: Pressure vessel 20A is filled with 1 / 3 hydrogen and 2 / 3 water, at a pressure of 4.8 MPa. Pressure vessel 20B is filled with water and is under low pressure. Pressure vessel 20C is filled with 2 / 3 water and 1 / 3 hydrogen and is under low pressure. Pressure vessel 20D is filled with 1 / 3 water and 2 / 3 hydrogen and is under low pressure. Pressure vessel 20E is filled with low-pressure hydrogen, at a pressure of 1.6 MPa. Pressure vessel 20F is filled with 2 / 3 hydrogen and 1 / 3 water, at a pressure of 2.4 MPa.

[0116] The first-stage compression, second-stage compression, and gas supply process described above are then repeated. Pressure vessel 20A can then supply hydrogen gas at a pressure of 4.8 MPa, while the hydrogen gas in pressure vessels 20E and 20F can be compressed to 2.4 MPa and 4.8 MPa, respectively, and so on. Through this cycle, low-pressure hydrogen gas can be progressively compressed to a preset hydrogen delivery pressure, and the high-pressure hydrogen gas that has reached the preset delivery pressure can be continuously transported downstream.

[0117] It should be noted that before each of the aforementioned first-stage compression, second-stage compression, and gas supply processes, to reduce energy consumption and to fully utilize the residual high-pressure gas, the pressure equalization valve 50 of the corresponding pressure vessel 20 can be opened for pressure equalization. For example, as described above, when the low-pressure hydrogen in pressure vessel 20A is compressed to 2.4 MPa, and the hydrogen in pressure vessel 20C at a pressure of 4.8 MPa is exhausted, the pressure equalization valves 50 corresponding to pressure vessels 20C and 20A can be opened to release the residual gas in the gas space at the top of pressure vessel 20C (equivalent to the clearance volume of a conventional compressor) into pressure vessel 20A for pressure equalization. Then, the pressure equalization valve 50 corresponding to pressure vessel 20A is closed, and the pressure equalization valve 50 corresponding to pressure vessel 20F, which is in a low-pressure state, is opened, allowing pressure vessels 20C and 20F to equalize pressure. Because the gas space at the top of pressure vessel 20C is small, the secondary pressure equalization process is extremely fast.

[0118] It is worth noting that in this application, hydrogen compression is achieved by using power components 32, i.e., water pumps, to drive water transfer and inject water into the corresponding pressure vessels 20. Due to the direct contact between water and hydrogen, and the characteristics of water's high specific heat, high density, and high latent heat of vaporization, a highly approximate isothermal compression process of hydrogen can be achieved. In contrast, traditional hydrogen compressors cannot achieve isothermal compression in each stage but rather approximate adiabatic compression.

[0119] Hydrogen can be considered an ideal gas, and its compression work follows the formula:

[0120] Isothermal compression work W iso =nRT1ln P2 / P1

[0121] Adiabatic compression work W adi =k / (k-1)nRT1

(P2 / P1) (K-1) / K -1

[0122] Where k is the adiabatic index, and for diatomic gases k = 1.4. P1 is the pressure before compression, P2 is the pressure after compression, T1 is the temperature before compression, and n is the molar flow rate.

[0123] Then W iso / W adi=nRT1ln(P2 / P1) / {k / (k-1)nRT1

(P2 / P1) (K-1) / K -1

(P2 / P1) (K-1) / K -1

[0124] Therefore, when P2 / P1 = 3, W iso / W adi =0.8513. When P2 / P1 = 4, W iso / W adi =0.815. In other words, the higher the single-stage pressure ratio, the more obvious the advantages of isothermal compression. For example, considering that the isentropic efficiency and mechanical efficiency of water pumps are usually higher than those of compressors and there is no compressor cooler resistance, when the pressure ratio is 3, the scheme in this application saves about 15%-20% of power compared with the traditional hydrogen compressor compression scheme.

[0125] For example, assuming a green ammonia synthesis capacity of 30,000 tons / year requires 15 MPa and a flow rate of 7500 Nm³. 3 The device requires pressurizing hydrogen gas at a temperature of 30℃ and a pressure of 5MPa to a pressure of 15MPa. Six seamless steel pipes with an inner diameter of 800mm and a height of 10m can be used as pressure vessels. Calculations show that the total power consumption of the three pumps, Wp, is 27.6MJ, and the power output, W, is 255kW. This is comparable to the power consumption of isothermal compression, W... iso =257.4kw equivalent.

[0126] The power of a traditional single-stage hydrogen compressor with adiabatic compression work (W) adi =1086MJ=301KW.

[0127] Comparison shows that the water pump's water-driven power of 255 kW in the device of this application is equivalent to the isothermal compression power of the compressor 257.4 kW. Compared to the adiabatic compression power of the hydrogen compressor 301 kW, it saves 15.3% of power consumption.

[0128] The hydrogen compression and supply device and system of this application are driven by a power mechanism and achieve the purpose of compressing low-pressure hydrogen in a closed pressure vessel by injecting water into it. Furthermore, driven by the power mechanism and using water as the working medium, the compressed hydrogen in the pressure vessel can also be transported to downstream equipment, thus realizing the simultaneous operation of hydrogen compression and supply. This system eliminates the need for expensive hydrogen compressors in both the hydrogen compression and supply processes, resulting in better safety, lower power consumption, higher reliability, and significantly reduced costs.

[0129] The hydrogen compression and supply device and system of the present application embodiments are applicable to situations where a high-pressure hydrogen storage and transportation system is not required, i.e., where hydrogen is directly supplied to downstream chemical systems after being pressurized from low pressure, or where hydrogen needs further pressurization after being supplied from a high-pressure hydrogen storage and transportation system. It is also applicable to situations requiring continuous delivery of compressed hydrogen instead of storage in a hydrogen storage and transportation system followed by hydraulic propulsion.

[0130] The hydrogen compression and supply device and system in this application embodiment can steplessly adjust the hydrogen flow rate by adjusting the flow rate of each power component, namely the water pump. Compared with the traditional reciprocating compressor which only relies on the top opening valve for adjustment, it has greater operational flexibility, a larger adjustment range, higher pressurization efficiency, and a higher hydrogen supply rate.

[0131] The hydrogen compression and supply device and system in this application embodiment organically combine the processes of compressing low-pressure hydrogen to medium-pressure, compressing medium-pressure hydrogen to high-pressure, and supplying high-pressure hydrogen externally. This results in better process continuity, greater practicality, and higher operating efficiency. Furthermore, each pressure vessel has a small amount of residual hydrogen during each filling and discharging process, leading to higher pressure vessel utilization and reduced investment costs.

[0132] The hydrogen compression and supply device and system in this application embodiment are interconnected by pipelines, and water is transferred between the pressure vessels to achieve hydrogen compression and external supply. Because the water operates in a closed pipeline, it does not come into contact with air, thereby effectively preventing corrosion of the inner walls of the pressure vessels and effectively extending the service life of the pressure vessels.

[0133] 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.

[0134] 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 compression and supply device, characterized in that, include: A hydrogen pipeline for connecting to a hydrogen production device to receive low-pressure hydrogen produced by the device; At least four pressure vessels are connected to the hydrogen pipeline, and each pressure vessel stores hydrogen and / or water at a predetermined pressure and proportion. The power unit is located between the water storage pressure vessel and the hydrogen storage pressure vessel; The output pipeline is connected to each of the at least four pressure vessels; The device has a compression process and a gas supply process. During the compression process, the water in the water storage pressure vessel can be transferred to each hydrogen storage pressure vessel via the power mechanism to compress the hydrogen in each hydrogen storage pressure vessel to a predetermined pressure. During the gas supply process, when any of the predetermined pressures reaches the preset hydrogen supply pressure or any other pressure vessel reaches the preset hydrogen supply pressure, water is transferred into the corresponding pressure vessel through the power mechanism so that the pressure vessel can supply hydrogen to the outside through the output pipeline. The compression process and the gas supply process can be carried out simultaneously.

2. The hydrogen compression and supply device according to claim 1, characterized in that, The device has a multi-stage compression process. Before any of the predetermined pressures reaches the hydrogen delivery pressure, the power mechanism can transfer water into the pressure vessel at the predetermined pressure to perform the next stage of compression on the pressure vessel.

3. The hydrogen compression and supply device according to claim 1 or 2, characterized in that, The power mechanism includes at least two water supply pipelines connected in parallel, and the water supply pressure of each water supply pipeline is different. The water supply pipeline with higher water pressure is used to transfer water to a pressure vessel with higher hydrogen pressure.

4. The hydrogen compression and supply device according to claim 3, characterized in that, The power mechanism includes at least two power components, each with a different working pressure, and each power component is respectively installed on each of the water supply pipelines.

5. The hydrogen compression and supply device according to claim 3, characterized in that, Each pressure vessel is connected to a water inlet pipe, and the number of water inlet pipes configured on each pressure vessel corresponds to the number of water supply pipes. Each water inlet pipe of each pressure vessel is connected to each water supply pipe, and each water inlet pipe is equipped with a water inlet valve.

6. The hydrogen compression and supply device according to claim 1, characterized in that, While the water in each water storage pressure vessel is transferred via the power mechanism, each water storage pressure vessel can receive hydrogen through the hydrogen pipeline.

7. The hydrogen compression and supply device according to claim 1, characterized in that, Each pressure vessel is connected to an independent inlet pipe and an outlet pipe. Each inlet pipe is connected to the hydrogen pipeline, and each outlet pipe is connected to the outlet pipeline. Each of the aforementioned air intake pipes is equipped with an air intake valve, and each of the aforementioned air outlet pipes is equipped with an air outlet valve.

8. The hydrogen compression and supply device according to claim 1, characterized in that, Each pressure vessel is connected to a drain pipe, and each drain pipe is connected to the water inlet of the power mechanism. Each drain pipe is equipped with a drain valve.

9. The hydrogen compression and supply device according to claim 1, characterized in that, The system includes a pressure equalization valve, which is disposed between any two of the pressure vessels and is used to balance the gas phase pressure of any two of the pressure vessels.

10. The hydrogen compression and supply device according to claim 1, characterized in that, It includes a heat exchanger, which is disposed between any two of the pressure vessels and connected in series with the power mechanism. The heat exchanger is used to exchange heat with water transferred between any two of the pressure vessels.

11. The hydrogen compression and supply device according to claim 1, characterized in that, The system includes a gas-liquid separator, which is disposed between any two of the pressure vessels and connected in series with the power mechanism. The gas-liquid separator is used to separate water and gas in water transferred between any two of the pressure vessels.

12. A hydrogen compression and supply system, characterized in that, It includes a hydrogen production device and a hydrogen compression and supply device as described in any one of claims 1 to 11, wherein the hydrogen pipeline is connected to the outlet end of the hydrogen production device.

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