Hydrogenation system

Abstract

This application relates to the field of hydrogen refueling technology, and in particular to a hydrogen refueling system, including a main hydrogen source and a backup hydrogen source. The main hydrogen source, buffer cylinder, low-pressure compressor, high-pressure compressor, heat exchanger, and hydrogen dispenser are sequentially connected to form a main pipeline. The inlet of the heat exchanger is connected to the outlet of any second hydrogen storage cylinder group via a sequential control cabinet, and the outlet of the heat exchanger is connected to the inlet of any second hydrogen storage cylinder group via the sequential control cabinet. The backup hydrogen source, vent valve group, and the inlet of the first hydrogen storage cylinder are sequentially connected. The outlet of the first hydrogen storage cylinder is connected to the main pipeline connecting the low-pressure compressor and the high-pressure compressor. Therefore, by adopting a dual-source structure, after the main hydrogen source for water electrolysis is interrupted, a backup long-tube trailer can be used to replenish the gas supply, meeting the requirements of the hydrogen refueling station. Moreover, the hydrogen storage operation from the compressor to the second hydrogen storage cylinder group and the hydrogen dispensing operation from the second hydrogen storage cylinder group to the hydrogen dispenser share the same heat exchanger, resulting in energy saving and consumption reduction.

Description

Technical Field

[0001] This application relates to the field of hydrogenation technology, and in particular to a hydrogenation system. Background Technology

[0002] Hydrogen can be used as a fuel in various fields such as transportation and industry. Moreover, the only byproduct of hydrogen combustion is water, producing no harmful emissions and making it highly environmentally friendly. Therefore, hydrogen is widely used in daily life. With its widespread application, the number of hydrogen refueling stations has increased dramatically, providing users with hydrogen. However, existing hydrogen refueling stations primarily rely on hydrogen produced through electrolysis. If the water electrolysis system malfunctions and shuts down, it cannot continue refueling downstream hydrogen fuel cell vehicles, resulting in a poor user experience. Utility Model Content

[0003] The purpose of this application is to provide a hydrogen refueling system that, to a certain extent, solves the technical problem in the prior art where the gas source of existing hydrogen refueling stations mainly comes from hydrogen produced by electrolysis. If the water electrolysis is shut down due to a malfunction, it will be unable to continue refueling downstream hydrogen fuel cell vehicles, causing a poor user experience.

[0004] This application provides a hydrogen refueling system, including: a main hydrogen source, a buffer bottle, a low-pressure compressor, a high-pressure compressor, a heat exchanger, a hydrogen dispenser, a sequential control cabinet, multiple second hydrogen storage cylinder groups, a backup hydrogen source, a vent valve group, and a first hydrogen storage cylinder; The main hydrogen source, the buffer bottle, the low-pressure compressor, the high-pressure compressor, the heat exchanger, and the hydrogen dispenser are sequentially connected to form a main pipeline. The inlet of the heat exchanger is connected to the outlet of each second hydrogen storage cylinder group via the sequential control cabinet, and the outlet of the heat exchanger is connected to the inlet of each second hydrogen storage cylinder group via the sequential control cabinet. The backup hydrogen source, the vent valve assembly, and the inlet of the first hydrogen storage cylinder are connected in sequence, and the outlet of the first hydrogen storage cylinder is connected to the main pipeline connecting the low-pressure compressor and the high-pressure compressor.

[0005] In the above technical solution, the main hydrogen source is hydrogen produced by electrolysis of water.

[0006] In any of the above technical solutions, the backup hydrogen source is a long-tube trailer gas source.

[0007] In any of the above technical solutions, a switching valve is further provided on the pipeline connecting the vent valve assembly and the first hydrogen storage cylinder.

[0008] In any of the above technical solutions, the sequential control cabinet further includes a main input pipeline, an input branch pipeline, an input branch pipeline, an output branch pipeline, an output branch pipeline, and a main output pipeline; wherein, the main input pipeline is connected to the outlet end of the heat exchanger; and the main output pipeline is connected to the inlet end of the heat exchanger. There are multiple input branch lines, each corresponding to and connected to the inlet of one of the multiple second hydrogen storage cylinder groups; each input branch line is connected to the main input line via the input branch line; each input branch line is equipped with an input control valve; there are multiple output branch lines, each corresponding to and connected to the outlet of one of the multiple second hydrogen storage cylinder groups; each output branch line is connected to the main output line via the input branch line; each input branch line is equipped with an output control valve.

[0009] In any of the above technical solutions, the inlet and outlet of the second hydrogen storage cylinder group are the same inlet and outlet.

[0010] In any of the above technical solutions, the hydrogen refueling system further includes a plurality of first connecting pipeline assemblies, and the number of the plurality of first connecting pipeline assemblies is the same as that of the plurality of second hydrogen storage cylinder groups, and they correspond one-to-one; each of the first connecting pipeline assemblies includes a first main connecting pipeline and a plurality of first branch connecting pipelines, and the plurality of first branch connecting pipelines correspond one-to-one with and are connected to the vents of the plurality of gas cylinders in the corresponding second hydrogen storage cylinder group; the first main connecting pipeline has the inlet and outlet ends.

[0011] In any of the above technical solutions, the hydrogen refueling system further includes a transfer pipe, and each of the input branch pipes is connected to the inlet and outlet ends of the corresponding second hydrogen storage cylinder group via the transfer pipe; one end of each output branch pipe is connected to the input branch pipe.

[0012] In any of the above technical solutions, the pipeline connecting the high-pressure compressor and the inlet end of the heat exchanger is further connected to the output end of the total output pipeline.

[0013] In any of the above technical solutions, the pipeline connecting the outlet end of the heat exchanger to the hydrogen refueling machine is further connected to the input end of the total input pipeline.

[0014] In any of the above technical solutions, each of the output branch pipes is further provided with a one-way valve.

[0015] In any of the above technical solutions, the number of gas cylinders included in the plurality of second hydrogen storage cylinder groups gradually increases.

[0016] In any of the above technical solutions, the discharge pressure of the low-pressure compressor is further 20 MPa.

[0017] In any of the above technical solutions, the discharge pressure of the high-pressure compressor is further 90 MPa.

[0018] In any of the above technical solutions, the maximum working pressure of the first hydrogen storage cylinder is further 20 MPa.

[0019] In any of the above technical solutions, further, the maximum working pressure of each gas cylinder in any of the second hydrogen storage cylinder groups is 70 MPa.

[0020] In any of the above technical solutions, further, the inlet and outlet of the first hydrogen storage cylinder are the same port, and the pipeline connecting the outlet of the first hydrogen storage cylinder and the main pipeline connecting the low-pressure compressor and the high-pressure compressor is part of the pipeline connecting the vent valve assembly and the inlet of the first hydrogen storage cylinder.

[0021] Compared with the prior art, the beneficial effects of this application are as follows: This application adopts a dual-source structure with a main hydrogen source, such as hydrogen produced by water electrolysis, and a backup hydrogen source, such as a long-tube trailer gas source. After the main hydrogen source produced by water electrolysis is interrupted, the long-tube trailer can be used to replenish the gas, meeting the requirements of the hydrogen refueling station. Moreover, the hydrogen storage operation from the compressor to the second hydrogen storage cylinder group and the hydrogen refueling operation from the second hydrogen storage cylinder group to the hydrogen refueling machine share the same heat exchanger, which saves energy and reduces consumption. Attached Figure Description To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a hydrogenation system provided in an embodiment of this application.

[0023] Figure label: 1-Main hydrogen source, 2-Buffer bottle, 3-Low-pressure compressor, 4-High-pressure compressor, 5-Heat exchanger, 6-Hydrogen dispenser, 7-Control cabinet, 71-Main input pipeline, 72-Input branch pipeline, 73-Input branch pipeline, 74-Output branch pipeline, 75-Output branch pipeline, 76-Main output pipeline, 8-Second hydrogen storage cylinder group, 81-Inlet / outlet end, 9-Backup hydrogen source, 10-Vacuum relief valve group, 11-First hydrogen storage cylinder, 12-Transfer pipeline, 13-Check valve, 14-First auxiliary connection pipeline, 15-Second auxiliary connection pipeline, 5101, 5102, 5103, 5104, 5105, 5106, 3001-Control valve. Detailed Implementation

[0024] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0025] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0026] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] The following reference Figure 1This application describes a hydrogenation system according to some embodiments.

[0030] See Figure 1 As shown, an embodiment of this application provides a hydrogen refueling system, including: a main hydrogen source 1, a buffer bottle 2, a low-pressure compressor 3, a high-pressure compressor 4, a heat exchanger 5, a hydrogen dispenser 6, a sequential control cabinet 7, multiple second hydrogen storage cylinder groups 8, a backup hydrogen source 9, a vent valve group 10, and a first hydrogen storage cylinder 11; wherein, the main hydrogen source 1, buffer bottle 2, low-pressure compressor 3, high-pressure compressor 4, heat exchanger 5, and hydrogen dispenser 6 are sequentially connected to form a main pipeline, and the inlet end of the heat exchanger 5 is connected to the main pipeline via the sequential control cabinet 7. The outlet of each second hydrogen storage cylinder group 8 is connected, and the outlet of the heat exchanger 5 is connected to the inlet of each second hydrogen storage cylinder group 8 via the sequential control cabinet 7. The inlet of the backup hydrogen source 9, the vent valve group 10, and the first hydrogen storage cylinder 11 are connected in sequence, and the outlet of the first hydrogen storage cylinder 11 is connected to the main pipeline connecting the low-pressure compressor 3 and the high-pressure compressor 4. In other words, the main pipeline connecting the low-pressure compressor 3 and the high-pressure compressor 4 is connected to the outlet of the first hydrogen storage cylinder 11.

[0031] Further, preferably, such as Figure 1 As shown, the main hydrogen source 1 is hydrogen produced by electrolysis of water; the backup hydrogen source 9 is a gas source from a long-tube trailer. This will be used as an example in the following text. Of course, it is not limited to this. Other types of gas sources can also be selected for the main hydrogen source 1 and the backup hydrogen source 9. As can be seen from the structure described above, this application is equipped with a main hydrogen source 1 and a backup hydrogen source 9. The hydrogen is supplied to the fuel cell vehicle through a low-pressure compressor 3, a high-pressure compressor 4, a heat exchanger 5, a sequential control cabinet 7, and a second hydrogen storage cylinder group 8, and finally through a hydrogen refueling machine 6. It can be seen that this application adopts a dual-source structure with a main hydrogen source 1, such as hydrogen produced by water electrolysis, and a backup hydrogen source 9, such as a long-tube trailer gas source. After the main hydrogen source produced by water electrolysis is interrupted, the long-tube trailer can be used to replenish the gas, which can meet the requirements of the hydrogen refueling station. Moreover, the hydrogen storage operation from the compressor to the second hydrogen storage cylinder group 8 and the hydrogen refueling operation from the second hydrogen storage cylinder group 8 to the hydrogen refueling machine 6 share the same heat exchanger 5, which saves energy and reduces consumption.

[0032] In addition, the present application includes a heat exchanger 5, which in particular ensures that the 70MPa Type IV bottle, as the second hydrogen storage cylinder group 8, will not overheat during filling. Of course, the second hydrogen storage cylinder group 8 is not limited to the 70MPa Type IV bottle, and can be selected according to actual needs.

[0033] In this embodiment, preferably, as follows: Figure 1As shown, the sequential control cabinet 7 includes a main input pipe 71, an input branch pipe 72, an input branch pipe 73, an output branch pipe 74, an output branch pipe 75, and a main output pipe 76; wherein, the main input pipe 71 is connected to the outlet end of the heat exchanger 5; and the main output pipe 76 is connected to the inlet end of the heat exchanger 5. There are multiple input branch lines 73, each corresponding to and connected to the inlet end of one of the multiple second hydrogen storage cylinder groups 8; each input branch line 73 is connected to the main input line 71 via an input branch line 72; each input branch line 73 is equipped with an input control valve; there are multiple output branch lines 74, each corresponding to and connected to the outlet end of one of the multiple second hydrogen storage cylinder groups 8; each output branch line 74 is connected to the main output line 76 via an input branch line 72; each input branch line 73 is equipped with an output control valve.

[0034] Furthermore, preferably, the number of the second hydrogen storage cylinder group 8 is three, and they are respectively named the low-pressure hydrogen storage cylinder group, the medium-pressure hydrogen storage cylinder group, and the high-pressure hydrogen storage cylinder group. The number of gas cylinders included in the low-pressure, medium-pressure, and high-pressure hydrogen storage cylinder groups increases sequentially, and each gas cylinder is identical. Preferably, the maximum working pressure of each gas cylinder is 70 MPa. However, this is not a limitation; it can be greater than 70 MPa or less than 70 MPa. This will be used as an example later. Of course, the number of the second hydrogen storage cylinder group 8 is not limited to three; it can be less than three (e.g., two), or more than three (e.g., four, five, or six), depending on actual needs.

[0035] Further, preferably, such as Figure 1 As shown, a switch valve is installed on the pipeline connecting the vent valve assembly 10 and the first hydrogen storage cylinder 11. This valve can be named control valve 3001. The switch valve, i.e. control valve 3001, is used to control the opening or closing of the backup path. Of course, this switch valve may not be installed. Instead, the opening or closing of the backup path can be controlled by the valve itself equipped on the long tube trailer.

[0036] Further, preferably, such as Figure 1 As shown, the discharge pressure of the low-pressure compressor 3 is 20MPa. This will be used as an example in the following text. Of course, it is not limited to this. The discharge pressure of the low-pressure compressor 3 can also be greater than 20MPa or less than 20MPa. Further, preferably, such as Figure 1 As shown, the discharge pressure of the high-pressure compressor 4 is 90 MPa, and this will be used as an example in the following text. Of course, it is not limited to this. The discharge pressure of the low-pressure compressor 3 can also be greater than 90 MPa or less than 90 MPa. Further, preferably, such as Figure 1As shown, the maximum working pressure of the first hydrogen storage cylinder 11 is 20 MPa. Furthermore, it should be noted that, to distinguish between the input control valves on each input branch line 73 and the output control valves on each output branch line 74, they are named as follows: the four input control valves are named control valve 5101, control valve 5102, and control valve 5103, and the four output control valves are named control valve 5104, control valve 5105, and control valve 5106. Based on the structure described above, the hydrogenation system provided in this application has the following operating states: (1) When there is no hydrogen addition signal, and hydrogen is produced by electrolysis of water as the gas source: First, when the pressure of the 70MPa high-pressure hydrogen storage cylinder group is lower than 65 MPa, the low-pressure compressor 3 (20MPa) and the high-pressure compressor 4 (90MPa) start, compressing the hydrogen and increasing the pressure until it reaches 70MPa (corresponding to the opening of the action control valve 5103); Second, when the pressure of the 70MPa medium-pressure hydrogen storage cylinder group is lower than 65 MPa, the low-pressure compressor 3 (20MPa) and the high-pressure compressor 4 (90MPa) continue to compress the hydrogen to 70MPa (corresponding to the opening of the action control valve 5102); Then, when the pressure of the 70MPa low-pressure hydrogen storage cylinder group is lower than 65... When the pressure reaches 70 MPa, the low-pressure compressor 3 (20 MPa) and the high-pressure compressor 4 (90 MPa) continue to compress the hydrogen to 70 MPa (corresponding to the opening of the action control valve 5101); finally, when the pressure of the 20 MPa hydrogen storage tank is lower than the set pressure, the low-pressure compressor 3 (20 MPa) continues to pressurize the 20 MPa hydrogen storage tank until it reaches 20 MPa. After all the second hydrogen storage tank groups 8, i.e., the 70 MPa hydrogen storage tanks, reach 70 MPa and the first hydrogen storage tank 11, i.e. the 20 MPa hydrogen storage tank, reaches 20 MPa, the compressor automatically stops pressurizing.

[0037] (2) When there is no hydrogen refueling signal and the long-tube trailer is used as the gas source: First, when the pressure of the 70MPa high-pressure hydrogen storage cylinder group is lower than 65 MPa, the high-pressure compressor 4 (90MPa) starts, compresses the hydrogen, and pressurizes it until it reaches 70MPa (corresponding to the opening of the action control valve 5103); second, when the pressure of the 70MPa medium-pressure hydrogen storage cylinder group is lower than 65 MPa, the high-pressure compressor 4 (90MPa) continues to compress the hydrogen to 70MPa (corresponding to the opening of the action control valve 5102); then, when the pressure of the 70MPa low-pressure hydrogen storage cylinder group is lower than 65 MPa, the high-pressure compressor 4 (90MPa) continues to compress the hydrogen to 70MPa (corresponding to the opening of the action control valve 5101); finally, all the second hydrogen storage cylinder groups 8, i.e., the 70MPa hydrogen storage cylinders, reach 70MPa (during this process, the control valve 3001, i.e., the switching valve, closes). (3) When the 70MPa hydrogen dispenser 6 sends a hydrogen supply signal and hydrogen is produced by water electrolysis as the gas source: First, hydrogen is drawn from the 70MPa low-pressure hydrogen storage tank to refuel the fuel cell vehicle (corresponding to the opening of the action control valve 5104). When the flow rate of the hydrogen refueling machine 6 is less than the set value, it automatically switches to the medium-pressure hydrogen storage tank to continue refueling (corresponding to the opening of the action control valve 5105). After refueling for a period of time, when the flow rate of the hydrogen refueling machine 6 is less than the set value, it automatically switches to the high-pressure hydrogen storage tank to continue refueling (corresponding to the opening of the action control valve 5106). After refueling for a period of time, when the flow rate of the hydrogen refueling machine 6 is less than the set value, the drawing of hydrogen from the second hydrogen storage tank 8 stops, and the low-pressure compressor 3 (20MPa) and the high-pressure compressor 4 (90MPa) are turned on, directly charging until the fuel cell vehicle pressure reaches 70MPa, and the hydrogen refueling ends.

[0038] (4) When the 70MPa hydrogen refueling machine 6 issues a hydrogen refueling signal, and the long-tube trailer serves as the gas source: First, hydrogen is drawn from the 70MPa low-pressure hydrogen storage tank to refuel the fuel cell vehicle (corresponding to the opening of the action control valve 5104). When the flow rate of the hydrogen refueling machine 6 is less than the set value, it automatically switches to the medium-pressure hydrogen storage tank to continue refueling (corresponding to the opening of the action control valve 5105). After refueling for a period of time, when the flow rate of the hydrogen refueling machine 6 is less than the set value, it automatically switches to the high-pressure hydrogen storage tank to continue refueling (corresponding to the opening of the action control valve 5106). After refueling for a period of time, when the flow rate of the hydrogen refueling machine 6 is less than the set value, the drawing of hydrogen from the second hydrogen storage tank 8 is stopped, and the high-pressure compressor 4 (90MPa) directly charges until the fuel cell vehicle pressure reaches 70MPa (during this process, the control valve 3001, i.e., the on / off valve, automatically shuts off), and the hydrogen refueling is completed.

[0039] It should be noted that processes (1) and (2) mentioned above are hydrogen storage processes, while processes (3) and (4) mentioned above are hydrogen addition processes.

[0040] As described above, this hydrogen refueling system ensures uninterrupted gas supply by setting up dual gas sources at the inlet. Through flow regulation of the hydrogen refueling machine 6 and control via the sequential control cabinet 7, it meets the requirements for rapid and safe hydrogen refueling of 70MPa fuel cell vehicles. It also makes full use of the owner's existing 70MPa gas cylinders, saving on equipment investment. Furthermore, through different valve controls within the sequential control cabinet 7, hydrogen storage and refueling share a single heat exchanger 5, and cross-flow does not occur, making it more reliable. In addition, during hydrogen storage, the hydrogen is first pressurized by the high-pressure compressor 4 and cooled by the heat exchanger 5 before entering the second hydrogen storage cylinder group 8. This ensures that the temperature of the second hydrogen storage cylinder group 8 does not exceed 85 degrees Celsius, reducing the requirements for the second hydrogen storage cylinder group 8 and contributing to cost reduction.

[0041] Furthermore, preferably, the hydrogenation system further includes a first auxiliary connection pipe 14 and a second auxiliary connection pipe 15, wherein the first auxiliary connection pipe 14 is connected between the inlet end of the heat exchanger 5 and the main output pipe 76, and the second auxiliary connection pipe 15 is connected between the outlet end of the heat exchanger 5 and the main input pipe 71.

[0042] In this embodiment, preferably, as follows: Figure 1 As shown, the inlet and outlet of the second hydrogen storage cylinder group 8 are the same port, also known as inlet / outlet end 81. This reduces piping and installation steps, simplifies the structure, facilitates maintenance, and saves time and effort. Of course, this is not the only option; the inlet and outlet of the second hydrogen storage cylinder group 8 can also be different ports, depending on actual needs.

[0043] In this embodiment, preferably, as follows: Figure 1 As shown, the hydrogen refueling system also includes multiple first connecting pipeline assemblies (not shown in the figure), and the number of multiple first connecting pipeline assemblies is the same as the number of multiple second hydrogen storage cylinder groups 8, and they correspond one-to-one; each first connecting pipeline assembly includes a first main connecting pipeline and multiple first branch connecting pipelines connected to the first main connecting pipeline, and the multiple first branch connecting pipelines correspond one-to-one with and are connected to the vents of multiple gas cylinders in the corresponding second hydrogen storage cylinder group 8; the inlet end of the second hydrogen storage cylinder group 8 is formed in the first main connecting pipeline; the first main connecting pipeline has the aforementioned inlet and outlet ends 81. As can be seen from the structure described above, for a second hydrogen storage cylinder group 8, it contains multiple gas cylinders. These multiple gas cylinders are connected by multiple first branch connecting pipes and a first main connecting pipe to ultimately form an input and output structure with the same inlet and outlet.

[0044] It should be noted that when the inlet and outlet of the second hydrogen storage cylinder group 8 are different ports, the following structure is also required: the hydrogen refueling system also includes multiple second connecting pipeline assemblies, and the number of multiple second connecting pipeline assemblies is the same as the number of multiple second hydrogen storage cylinder groups 8, and they correspond one-to-one; each second connecting pipeline assembly includes a second main connecting pipeline and multiple second branch connecting pipelines connected to the second main connecting pipeline, and the multiple second branch connecting pipelines correspond one-to-one with and are connected to the outlet of multiple gas cylinders in the corresponding second hydrogen storage cylinder group 8; the outlet of the second hydrogen storage cylinder group 8 is formed in the second main connecting pipeline.

[0045] In this embodiment, preferably, as follows: Figure 1 As shown, the hydrogen refueling system also includes a transfer pipe 12, and each input branch pipe 73 is connected to the inlet and outlet ends 81 of the corresponding second hydrogen storage cylinder group 8 via a transfer pipe 12; one end of each output branch pipe 74 is connected to the input branch pipe 73.

[0046] As can be seen from the structure described above, the transfer pipe 12 serves as a transfer, that is, connecting the sequential control cabinet 7 with the second hydrogen storage cylinder group, which can reduce the length of the input branch pipe 73 and the output branch pipe 74, thereby helping to reduce the volume of the sequential control cabinet 7 and contributing to miniaturization design.

[0047] It should be noted that when the inlet and outlet of the second hydrogen storage cylinder group 8 are different ports, a transfer pipe 12 is connected between any input branch pipe 73 and the corresponding inlet of the second hydrogen storage cylinder group 8. At the same time, a transfer pipe 12 is also connected between any output branch pipe 74 and the corresponding outlet of the second hydrogen storage cylinder group 8. The specific selection is based on actual needs.

[0048] In this embodiment, preferably, as follows: Figure 1 As shown, the pipeline connecting the high-pressure compressor 4 and the inlet of the heat exchanger 5 is connected to the output end of the main output pipeline 76. Only one pipeline needs to be led out from the inlet of the heat exchanger 5 for easy connection. However, this is not the only option; the output end of the main output pipeline 76 can also be directly connected to the inlet of the heat exchanger 5. Furthermore, to facilitate the leading out of two pipelines, a three-way valve or similar structure can be installed at the inlet of the heat exchanger 5, depending on the specific needs. In this embodiment, preferably, as follows: Figure 1 As shown, the pipeline connecting the outlet end of heat exchanger 5 to hydrogen dispenser 6 is connected to the inlet end of total input pipeline 71. A single pipeline can be led out from the outlet end of heat exchanger 5 for easy connection. However, this is not the only option; the inlet end of total input pipeline 71 can also be directly connected to the outlet end of heat exchanger 5. Furthermore, to facilitate the connection of two pipelines, a three-way valve or similar structure can be installed at the outlet end of heat exchanger 5, depending on actual needs.

[0049] In this embodiment, preferably, as follows: Figure 1 As shown, each output branch pipe 74 is equipped with a one-way valve 13 to ensure that the gas can only flow from the output branch pipe 74 to the output branch pipe 75, avoiding reverse flow of hydrogen and making it safer and more reliable.

[0050] In this embodiment, preferably, as follows: Figure 1As shown, the inlet and outlet of the first hydrogen storage cylinder 11 are the same port, and the pipeline connecting the outlet of the first hydrogen storage cylinder 11 and the main pipeline connecting the low-pressure compressor 3 and the high-pressure compressor 4 is part of the pipeline connecting the vent valve assembly 10 and the inlet of the first hydrogen storage cylinder 11. This saves on pipelines and connectors. Of course, it is not limited to this; the inlet and outlet of the first hydrogen storage cylinder 11 can also be different ports. In that case, the pipeline connecting the outlet of the first hydrogen storage cylinder 11 and the main pipeline connecting the low-pressure compressor 3 and the high-pressure compressor 4, and the pipeline connecting the vent valve assembly 10 and the inlet of the first hydrogen storage cylinder 11, that is, these two will be completely independent pipelines.

[0051] In this embodiment, preferably, as follows: Figure 1 As shown, the hydrogen refueling unit 6 is equipped with a flow regulating valve (not shown in the figure). During the hydrogen refueling stage, the flow rate is precisely controlled by the flow regulating valve to ensure that the flow rate meets the requirements during the hydrogen refueling process. Furthermore, preferably, the hydrogen refueling unit 6 is also equipped with an automatic shut-off valve (not shown in the figure) to ensure that the compressor does not overpressure during the direct-charge hydrogen refueling stage.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hydrogenation system, characterized in that, include: The system includes a main hydrogen source, buffer cylinder, low-pressure compressor, high-pressure compressor, heat exchanger, hydrogen dispenser, sequential control cabinet, multiple second hydrogen storage cylinder groups, backup hydrogen source, vent valve group, and the first hydrogen storage cylinder. The main hydrogen source, the buffer bottle, the low-pressure compressor, the high-pressure compressor, the heat exchanger, and the hydrogen dispenser are sequentially connected to form a main pipeline. The inlet of the heat exchanger is connected to the outlet of each of the second hydrogen storage cylinder groups via the sequential control cabinet, and the outlet of the heat exchanger is connected to the inlet of each of the second hydrogen storage cylinder groups via the sequential control cabinet. The backup hydrogen source, the vent valve assembly, and the inlet of the first hydrogen storage cylinder are connected in sequence, and the outlet of the first hydrogen storage cylinder is connected to the main pipeline connecting the low-pressure compressor and the high-pressure compressor.

2. The hydrogenation system of claim 1, wherein, The main hydrogen source is hydrogen produced by water electrolysis; and / or The backup hydrogen source is a long-tube trailer gas source.

3. The hydrogenation system of claim 1, wherein, A switch valve is installed on the pipeline connecting the vent valve assembly and the first hydrogen storage cylinder.

4. The hydrogenation system of claim 1, wherein, The control cabinet includes a main inlet pipe, an inlet branch pipe, an inlet branch pipe, an outlet branch pipe, an outlet branch pipe, and a main outlet pipe; wherein, the main inlet pipe is connected to the outlet end of the heat exchanger; and the main outlet pipe is connected to the inlet end of the heat exchanger. There are multiple input branch lines, each corresponding to and connected to the inlet of one of the multiple second hydrogen storage cylinder groups; each input branch line is connected to the main input line via the input branch line; each input branch line is equipped with an input control valve; there are multiple output branch lines, each corresponding to and connected to the outlet of one of the multiple second hydrogen storage cylinder groups; each output branch line is connected to the main output line via the input branch line; each input branch line is equipped with an output control valve.

5. The hydrogenation system of claim 4, wherein, The inlet and outlet of the second hydrogen storage cylinder group are the same.

6. The hydrogenation system according to claim 5, characterized in that, The hydrogen refueling system further includes multiple first connecting pipeline components, and the number of multiple first connecting pipeline components is the same as the number of multiple second hydrogen storage cylinder groups, and they correspond one-to-one; each of the first connecting pipeline components includes a first main connecting pipeline and multiple first branch connecting pipelines, and the multiple first branch connecting pipelines correspond one-to-one with and are connected to the vents of multiple gas cylinders in the corresponding second hydrogen storage cylinder group. The first main connecting pipeline has the aforementioned inlet and outlet ends.

7. The hydrogenation system of claim 5, wherein, The hydrogen refueling system also includes a transfer pipe, and each of the input branch pipes is connected to the inlet and outlet ends of the corresponding second hydrogen storage cylinder group via the transfer pipe; one end of each output branch pipe is connected to the input branch pipe.

8. The hydrogenation system of claim 4, wherein, The pipeline connecting the high-pressure compressor and the inlet of the heat exchanger is connected to the output end of the main output pipeline.

9. The hydrogenation system of claim 4, wherein, The outlet end of the heat exchanger is connected to the pipeline connecting the hydrogenator and the inlet end of the main inlet pipeline; and / or Each of the aforementioned output branch lines is equipped with a check valve; and / or The number of gas cylinders contained in the multiple second hydrogen storage cylinder groups gradually increases.

10. The hydrogenation system according to any one of claims 1 to 9, characterized in that, The discharge pressure of the low-pressure compressor is 20 MPa; and / or The discharge pressure of the high-pressure compressor is 90 MPa; and / or The maximum operating pressure of the first hydrogen storage cylinder is 20 MPa; and / or The maximum operating pressure of each cylinder in any of the second hydrogen storage cylinder groups is 70 MPa; and / or The inlet and outlet of the first hydrogen storage cylinder are the same port, and the pipeline connecting the outlet of the first hydrogen storage cylinder and the main pipeline connecting the low-pressure compressor and the high-pressure compressor is part of the pipeline connecting the vent valve assembly and the inlet of the first hydrogen storage cylinder.

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