Hydrogen refueling station system

Abstract

The invention relates to a hydrogen refueling station system which comprises a gas filling column, a compression system, a hydrogen storage system and a hydrogen filling machine which are sequentially connected in series, the compression system comprises a first compressor and a second compressor, the first compressor is connected with a first hydrogen storage bottle set, and the second compressor is connected with a second hydrogen storage bottle set. The sequence control panel arranged in the hydrogen refueling station system obtains the pressure in the equipment to be subjected to hydrogen refueling in real time according to the set control logic and judges the relation between the pressure and the hydrogen storage containers of different grades so as to adjust opening and closing of the corresponding valves and the opening degrees of the valves, hydrogen refueling of two refueling pressures is achieved in one hydrogen refueling station, and the safety of hydrogen refueling is improved. The device can be applied to equipment to be subjected to hydrogenation in different scenes, so that the filling pressure is controlled within a safe range, the hydrogenation safety is improved, meanwhile, hydrogenation is carried out at proper filling pressure, and the hydrogenation speed and efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogenation at hydrogen refueling stations, and in particular to a hydrogen refueling station system. Background Art

[0002] Hydrogen energy is internationally recognized as the green energy of the future due to its high energy efficiency, wide sources, renewable energy, and zero pollution from combustion products. Faced with the severe challenge of global climate change, the development of green energy has become a common goal of all countries. Hydrogen energy is internationally recognized as the green energy of the future due to its high energy efficiency, wide sources, renewable energy, and zero pollution from combustion products. In recent years, many countries and regions including the United States, Japan, China, South Korea, and the European Union have been vigorously developing hydrogen-powered vehicles and actively building hydrogen refueling stations and related hydrogen energy infrastructure. Hydrogen-powered vehicles have become an important application direction in the field of new energy.

[0003] In the existing hydrogen refueling stations and hydrogen refueling station designs, the source of hydrogen is mainly produced through high-carbon emission chemical processes such as natural gas reforming; the transportation of hydrogen mainly relies on long-distance high-pressure hydrogen transportation or liquid hydrogen transportation to hydrogen refueling stations to provide services for hydrogen energy vehicles. The cost of hydrogen production and transportation is high and is accompanied by high carbon dioxide emissions and other pollutant emissions. With the popularization of hydrogen fuel cell vehicles, the hydrogen refueling station network needs to achieve a distribution network similar to that of gas stations to increase the endurance and coverage of hydrogen fuel cell vehicles. At remote stations or sites with difficult access to municipal electricity, hydrogen refueling stations are required to have the ability to produce and store hydrogen on-site and provide their own electricity energy consumption.

[0004] In order to meet the construction needs of hydrogen refueling stations in the future, the skid-mounted in-station hydrogen production technology with high integration, convenient layout, small footprint, less civil construction, quick installation and fast station construction has significant advantages, which is the development trend of hydrogen refueling station construction in the future. At present, hydrogen refueling stations are mainly fixed stations, and fixed hydrogen refueling stations mainly use 35MPa hydrogen filling, even if there is 70Mpa filling, it is reserved. In addition, the process system of the conventional 70MPa filling pressure hydrogen refueling station still has the following problems: First, because the hydrogen filling port and hydrogen output port of the hydrogen storage bottle group are the same port, when the hydrogen storage bottle group supplies gas to the hydrogen filling machine, the hydrogen compression equipment cannot work, and the utilization rate of the hydrogen compression equipment is low. In addition, it is impossible to obtain hydrogen source from external hydrogen storage equipment in time, or when the internal supply of the hydrogen refueling station is sufficient, hydrogen cannot be sold out in time; second, although it is artificially divided into three levels of high, medium and low pressure, the rated working pressure of each hydrogen storage bottle of the hydrogen storage bottle group is the same, and the number of high-pressure hydrogen storage bottles is large, which is dangerous.

[0005] In summary, compressors generally tend to be designed according to one output pressure state and are usually only applicable to one design condition, which is not conducive to achieving energy saving in hydrogen refueling stations. Therefore, it is necessary to develop a multi-stage dual-pressure hydrogen compressor to directly build a 20 / 45MPa dual-pressure hydrogen refueling station. Summary of the invention

[0006] The technical problem to be solved by this application is that at remote stations or stations with difficulty in accessing the mains electricity, the hydrogen refueling station is required to have the ability to produce and store hydrogen on site and to provide its own electricity energy consumption. At the same time, the hydrogen refueling station is usually only applicable to one design condition, which is not conducive to achieving energy conservation in the hydrogen refueling station and cannot meet the application of multiple scenarios.

[0007] To solve the above technical problems, according to one aspect of the present application, a hydrogen refueling station system is provided, comprising a gas filling column, a compression system, a hydrogen storage system, and a hydrogen filling machine connected in series in sequence, the gas filling column is connected to an external hydrogen supply source through a gas unloading pipeline for supplying the hydrogen refueling station; the compression system comprises a first compressor and a second compressor, the inlet end of the first compressor and the inlet end of the second compressor are both connected to the outlet end of the gas filling column; the first compressor and the second compressor are both connected to a matching compressor chiller; the hydrogen storage system comprises a first hydrogen storage bottle group and a second hydrogen storage bottle group connected in parallel, the first hydrogen storage bottle group is connected to the output end of the first compressor, and the second hydrogen storage bottle group is connected to the output end of the second compressor; the output ends of the first hydrogen storage bottle group and the second hydrogen storage bottle group are both connected to the hydrogen filling machine through a high-pressure pipeline. Among them, the gas storage pressure of the first hydrogen storage bottle group is less than the gas storage pressure of the second hydrogen storage bottle group, and the exhaust pressure of the first compressor is less than that of the second compressor.

[0008] The sequence control panel is connected to the output ends of the first compressor and the second compressor through a valve, and the inlet end of the hydrogen filling machine is also connected to the sequence control panel through a valve; the control sequence panel uses the first compressor to extract hydrogen from the hydrogen production device in the station according to the control logic, and pressurizes it and fills it into the first hydrogen storage bottle group to the initial hydrogen pressure of the first hydrogen storage bottle group; uses the second compressor to extract hydrogen from the hydrogen production device in the station, and further pressurizes it and fills it into the second hydrogen storage bottle group to the initial hydrogen pressure of the second hydrogen storage bottle group; when necessary, the sequence control panel controls the first hydrogen storage bottle through a valve The first group fills hydrogen into the equipment to be hydrogenated through the corresponding hydrogen filling machine until the hydrogen pressure of the equipment to be hydrogenated reaches the required value. When the hydrogen pressure in the first hydrogen storage bottle group is not enough to make the hydrogen pressure of the equipment to be hydrogenated reach the required value, the second hydrogen storage bottle group is switched to fill hydrogen into the equipment to be hydrogenated through the hydrogen filling machine until the hydrogen pressure of the equipment to be hydrogenated reaches the required value. At the same time, when the pressure in the hydrogen storage bottle group is lower than the set value, the sequence control panel will control the corresponding compressor to start to pressurize the hydrogen storage bottle group, and the order of pressurizing and filling hydrogen is first the hydrogen storage bottle group with large gas storage pressure and then the hydrogen storage bottle group with small gas storage pressure.

[0009] According to an embodiment of the present application, the gas filling station also includes a venting pipeline, which includes a purge gas circuit and a nitrogen device connected to the purge gas circuit. The purge gas circuit is also connected to a gas unloading pipeline and an output pipeline of a hydrogen storage system.

[0010] According to the embodiments of the present application, the wall thickness of the hydrogen pipeline pipe of the hydrogen refueling station system shall not be less than 90% of the nominal wall thickness of the pipe; the wall thickness of the cold water pipe, vent pipe, and nitrogen pipe pipe of the hydrogen refueling station system shall not be less than 87.5% of the nominal wall thickness of the pipe.

[0011] According to an embodiment of the present application, the gas filling column is also connected to the first compressor and the second compressor through a buffer tank.

[0012] According to an embodiment of the present application, the exhaust pressure of the first compressor is 20 MPa, and the exhaust pressure of the second compressor is 45 MPa; the gas storage pressure of the first hydrogen storage bottle group is 20 MPa, and the gas storage pressure of the second hydrogen storage bottle group is 45 MPa.

[0013] According to an embodiment of the present application, the nitrogen device is a nitrogen container, which is connected to a purge gas circuit through a pipeline and is used to replace hydrogen in the pipeline during maintenance to ensure safety.

[0014] According to an embodiment of the present application, both the first hydrogen storage bottle group and the second hydrogen storage bottle group are provided with pressure detectors to detect the pressure therein.

[0015] According to an embodiment of the present application, the hydrogen source of the hydrogen refueling station system comes from an alkaline water electrolysis hydrogen production project.

[0016] According to the embodiment of the present application, the hydrogen pipeline of the hydrogen refueling station system is processed by cutting with a special cold processing saw blade, flattening with a flattening machine, deburring with a chamfering machine, and threading with a CNC lathe. After processing, it is degreased with a degreasing liquid and cleaned with 95% alcohol.

[0017] According to an embodiment of the present application, the hydrogen refueling station system further includes an in-station hydrogen production device, and the in-station hydrogen production device is connected to the gas filling column.

[0018] According to an embodiment of the present application, the sequential control panel is connected to a control system, and the control system stores logic instructions, and the logic instructions are used to execute the hydrogenation station system to hydrogenate the equipment to be hydrogenated.

[0019] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0020] 1. The present invention can realize hydrogen filling at two filling pressures in one hydrogen filling station, thereby improving the utilization rate of hydrogen compression equipment and hydrogen storage equipment.

[0021] 2. The sequential control panel adopted in the present invention has a design and logic setting, which enables the hydrogen refueling station system to obtain the pressure inside the equipment to be hydrogenated in real time, and judge the corresponding relationship between the pressure and hydrogen storage containers with different pressures, and then adjust the relevant valves so that the hydrogen filling pressure inside the equipment to be hydrogenated reaches the required value, thereby increasing the safety of hydrogenation. At the same time, it can also ensure that the hydrogenation station system performs hydrogenation at the maximum allowable filling pressure, thereby improving the hydrogenation speed and efficiency.

[0022] 3. The sequential control panel adopted in the present invention is controlled by logic. When the pressure in the hydrogen storage bottle group is lower than the set value, the sequential control panel will control the corresponding compressor to start to pressurize the hydrogen storage bottle group, and the order of pressurizing and hydrogen filling is first the hydrogen storage bottle group with large gas storage pressure and then the hydrogen storage bottle group with small gas storage pressure. When the hydrogen storage bottle group is filling hydrogen for the vehicle, the compressor can simultaneously fill hydrogen for the bottle group that needs to be pressurized in the hydrogen storage bottle group, and will not cause the compressor to be diverted during the hydrogenation process, thereby greatly affecting the hydrogenation speed of the vehicle.

[0023] 4. The hydrogen refueling station in the present invention realizes the preparation, storage and filling of green hydrogen by using electrolyzed water, significantly eliminating carbon dioxide emissions in the hydrogen preparation process, and does not require city electricity input, thereby achieving its own water balance.

[0024] 5. The present invention can be widely used in the construction of 20 / 45MPa dual-pressure hydrogenation stations through the assembly of compressors. At the same time, the displacement of the compressors is increased by increasing the number of compressors, which can meet various application scenarios, and has broad application prospects and a wide range of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0026] Figure 1 A schematic diagram of the composition of a hydrogen refueling station system according to an example of the present invention;

[0027] Figure 2 This is a flow chart of the control logic of a hydrogen refueling station provided by one embodiment of the present invention.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. The first compressor, 2. The second compressor, 3. The first hydrogen storage bottle group, 4. The second hydrogen storage bottle group, 5. The buffer tank, 6. The sequential control panel, 7. The release pipeline, 8. The hydrogen filling machine. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0031] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the patent application specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but indicate the existence of at least one.

[0032] like Figure 1 and Figure 2 As shown, a hydrogen refueling station system exemplified in the present invention includes a gas filling column, a compression system, a hydrogen storage system, and a hydrogen filling machine 8 connected in series in sequence, wherein the compression system includes a first compressor 1 and a second compressor 2, the first compressor 1 is connected to a first hydrogen storage bottle group 3, and the second compressor is connected to a second hydrogen storage bottle group 4. The hydrogen refueling station system obtains the pressure inside the equipment to be hydrogenated in real time, and determines the relationship between the pressure and hydrogen storage containers of different grades, and then adjusts the switch of the corresponding valve and the valve opening thereof. It can be applied to equipment to be hydrogenated in different scenarios, so that the filling pressure is controlled within a safe range, thereby increasing the safety of hydrogenation. At the same time, hydrogenation is carried out at an appropriate filling pressure, thereby improving the hydrogenation speed and efficiency.

[0033] Specifically, the gas column is connected to an external hydrogen supply source through a gas unloading pipeline for supplying the hydrogen filling station. The external hydrogen supply source is the alkaline water electrolysis hydrogen production project of the hydrogen filling station system. The project uses wind power generation. When working in the electrolytic cell mode, it can use the DC power input from wind power generation to electrolyze water into hydrogen and oxygen, thereby producing hydrogen and avoiding the generation of polluting gases such as carbon dioxide.

[0034] In this embodiment, the compression system includes a first compressor 1 and a second compressor 2, and the inlet end of the first compressor 1 and the inlet end of the second compressor 2 are both connected to the outlet end of the gas filling column; the first compressor 1 and the second compressor 2 are both connected to a matching compressor chiller. The hydrogen storage system includes a first hydrogen storage bottle group 3 and a second hydrogen storage bottle group 4 connected in parallel, the first hydrogen storage bottle group 3 is connected to the output end of the first compressor 1, and the second hydrogen storage bottle group 4 is connected to the output end of the second compressor 2; the output ends of the first hydrogen storage bottle group 3 and the second hydrogen storage bottle group 4 are both connected to the hydrogen filling machine 8 through a high-pressure pipeline; the gas storage pressure of the first hydrogen storage bottle group 3 is less than the gas storage pressure of the second hydrogen storage bottle group 4, and the exhaust pressure of the first compressor 1 is less than that of the second compressor 2.

[0035] Preferably, the exhaust pressure of the first compressor 1 is 20 MPa, and the exhaust pressure of the second compressor 2 is 45 MPa; the gas storage pressure of the first hydrogen storage bottle group 3 is 20 MPa, and the gas storage pressure of the second hydrogen storage bottle group 4 is 45 MPa.

[0036] Specifically, the filling column is also connected to the first compressor 1 and the second compressor 2 through the buffer tank 5 to enhance the safety of hydrogen transportation.

[0037] Specifically, the sequence control panel 6 is connected to the output ends of the first compressor 1 and the second compressor 2 through a valve, and the inlet end of the hydrogen filling machine 8 is also connected to the sequence control panel 6 through a valve; the control sequence panel uses a low-pressure hydrogen compressor to extract hydrogen from the hydrogen production device in the station according to the control logic, and pressurizes it and fills it into the first hydrogen storage bottle group 3 to the initial hydrogen pressure of the first hydrogen storage bottle group 3; uses a medium-pressure hydrogen compressor to extract hydrogen from the hydrogen production device in the station, and further pressurizes it and fills it into the medium-pressure hydrogen storage bottle group to the initial hydrogen pressure of the medium-pressure hydrogen storage bottle group; when necessary, the sequence control panel 6 controls the first The hydrogen storage bottle group 3 fills hydrogen into the equipment to be hydrogenated through the corresponding hydrogen filling machine 8 until the hydrogen pressure of the equipment to be hydrogenated reaches the required value. When the hydrogen pressure in the first hydrogen storage bottle group 3 is not enough to make the hydrogen pressure of the equipment to be hydrogenated reach the required value, the second hydrogen storage bottle group 4 is switched to fill hydrogen into the equipment to be hydrogenated through the hydrogen filling machine 8 until the hydrogen pressure of the equipment to be hydrogenated reaches the required value. At the same time, when the pressure in the hydrogen storage bottle group is lower than the set value, the sequence control panel 6 will control the corresponding compressor to start to pressurize the hydrogen storage bottle group, and the order of pressurizing and hydrogen filling is first the hydrogen storage bottle group with large gas storage pressure and then the hydrogen storage bottle group with small gas storage pressure.

[0038] Specifically, the sequential control panel 6 is used to connect the compressor, the hydrogen storage bottle group, and the hydrogen filling machine 8 to control the flow direction and pressure of hydrogen and realize the automation and intelligence of the hydrogenation process. The sequential control panel 6 is connected to the outlet end of the compressor and the inlet end of the hydrogen filling machine 8 through a valve to realize the sequential filling and filling of hydrogen. The sequential control panel 6 can control the hydrogen to enter the first hydrogen storage bottle group 3 by controlling the valve, such as the valve installed between the first compressor 1 with a smaller exhaust pressure and the first hydrogen storage bottle group 3 and between the second compressor 2 with a larger exhaust pressure and the second hydrogen storage bottle group 4. When you want to control the first compressor 1 to inflate and pressurize the first hydrogen storage bottle group 3, you can open the valve corresponding to the compressor and start the compressor; when controlling to stop inflating and pressurizing, you can close the valve corresponding to the compressor and stop the compressor.

[0039] Specifically, the sequence control panel 6 can be connected to the compressor, hydrogen storage bottle group and other equipment through cables to achieve automatic control.

[0040] Specifically, the first hydrogen storage bottle group 3 and the second hydrogen storage bottle group 4 are both provided with pressure detectors.

[0041] Specifically, the valve may be a pneumatic valve with an actuator, and the actuator is connected to a control system provided with control logic.

[0042] Specifically, the sequence control panel 6 is connected to a control system, and the control system stores logic instructions, and the logic instructions are used to execute the hydrogenation station system to hydrogenate the equipment to be hydrogenated.

[0043] According to an embodiment of the present invention, the control logics mentioned above can be implemented by a controller, such as a PLC (Programmable Logic Controller), a single-chip microcomputer, a DSP (Digital Signal Processor), a SOC (System on a Chip), etc.

[0044] According to the present invention, those skilled in the art can understand that all or part of the steps to implement the above control logic can be completed by instructing the relevant hardware through a program, and the program is stored in a machine-readable storage medium, including a number of instructions to enable a single-chip microcomputer, a chip or a processor to execute all or part of the method steps in each embodiment of the present application. The aforementioned machine storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0045] In this embodiment, the gas filling station also includes a venting pipeline 7, which includes a purge gas circuit and a nitrogen device connected to the purge gas circuit. The purge gas circuit is also connected to the gas unloading pipeline and the output pipeline of the hydrogen storage system.

[0046] Specifically, the nitrogen device can be a nitrogen container, which is connected to the purge gas path through a pipeline and is used to replace the hydrogen in the pipeline during maintenance to ensure safety. The nitrogen used for purging is stored in a nitrogen container. In addition to removing the hydrogen remaining in the flow path and valve of the hydrogen filling station, it also removes impurities such as air. Nitrogen (N2) gas also supplies nitrogen to the hydrogen filling machine 8 through the hydrogenation equipment as needed to remove the hydrogen remaining in the flow path.

[0047] In this embodiment, the hydrogen filling station system also includes an in-station hydrogen production device, which is connected to the gas filling column and includes a wind power generation device and an electrolytic cell system.

[0048] Specifically, the wall thickness of the hydrogen pipeline pipes in the hydrogen refueling station system shall not be less than 90% of the nominal wall thickness of the pipes; the wall thickness of the cold water pipes, vent pipes, and nitrogen pipes in the hydrogen refueling station system shall not be less than 87.5% of the nominal wall thickness of the pipes.

[0049] Specifically, the hydrogen pipeline of the hydrogen filling station system is processed by cold processing special saw blade cutting, flattening machine flattening, chamfering machine deburring, and CNC lathe equipment for threading. After processing, it is degreased with degreasing liquid and cleaned with 95% alcohol.

[0050] In the embodiment of the present invention, the hydrogen refueling station uses two compressors with different exhaust pressures to compress hydrogen, namely, a first compressor 1 with a smaller exhaust pressure and a second compressor 2 with a larger exhaust pressure. Preferably, the exhaust pressure of the first compressor 1 can be 20MPa, and the exhaust pressure of the second compressor 2 can be 45MPa. In addition, the hydrogen refueling station also has a hydrogen storage bottle group for receiving hydrogen compressed by the compressor, such as the first hydrogen storage bottle group. Compared with the two compressors used in the hydrogen refueling station, the gas storage pressure of the first hydrogen storage bottle group 3 is closer to the exhaust pressure of the first compressor 1. Preferably, the gas storage pressure of the first hydrogen storage bottle group 3 can be 22MPa.

[0051] According to the present invention, the above-mentioned hydrogen refueling station of the present invention can refuel hydrogen for various types of hydrogen storage containers. More conveniently, the above-mentioned hydrogen refueling station of the present invention is more suitable for refueling hydrogen for vehicle-mounted hydrogen storage containers. For this reason, preferably, the hydrogen storage container is a vehicle-mounted hydrogen storage container. Such a vehicle-mounted hydrogen storage container can be a hydrogen storage bottle with two specifications, and the two specifications have a nominal pressure of 20MPa and 45MPa respectively.

[0052] In an embodiment of the present invention, the scale of the hydrogen refueling station supporting the hydrogen production device is 500 kilograms per day, and it is interconnected with the hydrogen production station put into production in the early stage. After meeting the hydrogen cooling requirements of the power plant generator, the hydrogen production station delivers about 1 ton of hydrogen to the hydrogen refueling station every day, which can meet the hydrogen demand of 30 hydrogen fuel cell heavy trucks and large buses, promote the carbon reduction and decarbonization of the coal and ash transportation links used in power plant production, significantly improve the economic benefits of the power station, and smoothly realize the full process of renewable energy hydrogen production and utilization. The hydrogen refueling station of this application will provide hydrogen filling services for surrounding hydrogen energy vehicles. This not only promotes the widespread application of hydrogen energy in the transportation field, but also opens up a new path for the development of green transportation across the country.

[0053] In summary, the technical solution of the present application has the following beneficial effects:

[0054] 1. The present invention can realize hydrogen filling at two filling pressures in one hydrogen filling station, thereby improving the utilization rate of hydrogen compression equipment and hydrogen storage equipment.

[0055] 2. The sequential control panel adopted in the present invention has a design and logic setting, which enables the hydrogen refueling station system to obtain the pressure inside the equipment to be hydrogenated in real time, and judge the corresponding relationship between the pressure and hydrogen storage containers of different grades, and then adjust the valve opening of the relevant valves, so that the hydrogen filling pressure inside the equipment to be hydrogenated reaches the required value, thereby increasing the safety of hydrogenation. At the same time, it can also ensure that the hydrogenation station system performs hydrogenation at the maximum allowable filling pressure, thereby improving the hydrogenation speed and efficiency.

[0056] 3. The sequential control panel adopted in the present invention is controlled by logic. When the pressure in the hydrogen storage bottle group is lower than the set value, the sequential control panel will control the corresponding compressor to start to pressurize the hydrogen storage bottle group, and the order of pressurizing and hydrogen filling is first the hydrogen storage bottle group with large gas storage pressure and then the hydrogen storage bottle group with small gas storage pressure. When the hydrogen storage bottle group is filling hydrogen for the vehicle, the compressor can simultaneously fill hydrogen for the bottle group in the hydrogen storage bottle group that needs to be pressurized, and will not cause the compressor to be diverted during the hydrogenation process, that is, hydrogen is simultaneously filled for a gas cylinder in the medium-pressure hydrogen storage bottle group and the vehicle, thereby greatly affecting the hydrogenation speed of the vehicle.

[0057] 4. The hydrogen refueling station in the present invention realizes the preparation, storage and filling of green hydrogen by using electrolyzed water, significantly eliminating carbon dioxide emissions in the hydrogen preparation process, and does not require city electricity input, thereby achieving its own water balance.

[0058] 5. The present invention can be widely used in the construction of 20 / 45MPa dual-pressure hydrogenation stations through the assembly of compressors. At the same time, the displacement of the compressors is increased by increasing the number of compressors, which can meet various application scenarios, and has broad application prospects and a wide range of use.

[0059] The above are merely exemplary embodiments of the present application and are not intended to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A hydrogen refueling station system, characterized in that: It includes a gas filling column, a compression system, a hydrogen storage system, and a hydrogen filling machine connected in series. The gas filling column is connected to an external hydrogen supply source through a gas discharge pipeline for supplying hydrogen to the hydrogen filling station; The compression system comprises a first compressor and a second compressor, wherein the inlet end of the first compressor and the inlet end of the second compressor are both connected to the outlet end of the gas filling column; the first compressor and the second compressor are both connected to a matching compressor chiller; The hydrogen storage system comprises a first hydrogen storage bottle group and a second hydrogen storage bottle group connected in parallel, wherein the first hydrogen storage bottle group is connected to the output end of the first compressor, and the second hydrogen storage bottle group is connected to the output end of the second compressor; the output ends of the first hydrogen storage bottle group and the second hydrogen storage bottle group are both connected to the hydrogen filling machine through high-pressure pipelines; Wherein, the gas storage pressure of the first hydrogen storage bottle group is less than the gas storage pressure of the second hydrogen storage bottle group, and the exhaust pressure of the first compressor is less than that of the second compressor; The sequence control panel is connected to the output ends of the first compressor and the second compressor through a valve, and the inlet end of the hydrogen filling machine is also connected to the sequence control panel through the valve; the control sequence panel uses the first compressor to extract hydrogen from the hydrogen production device in the station according to the control logic, and pressurizes it to fill it into the first hydrogen storage bottle group to the initial hydrogen pressure of the first hydrogen storage bottle group; uses the second compressor to extract hydrogen from the hydrogen production device in the station, and further pressurizes it to fill it into the second hydrogen storage bottle group to the initial hydrogen pressure of the second hydrogen storage bottle group; when necessary, the sequence control panel controls the first hydrogen storage bottle group through the valve The cylinder group fills hydrogen into the equipment to be hydrogenated through the corresponding hydrogen filling machine until the hydrogen pressure of the equipment to be hydrogenated reaches the required value. When the hydrogen pressure in the first hydrogen storage cylinder group is not enough to make the hydrogen pressure of the equipment to be hydrogenated reach the required value, the second hydrogen storage cylinder group is switched to fill hydrogen into the equipment to be hydrogenated through the hydrogen filling machine again until the hydrogen pressure of the equipment to be hydrogenated reaches the required value. At the same time, when the pressure in the hydrogen storage cylinder group is lower than the set value, the sequence control panel will control the corresponding compressor to start to pressurize the hydrogen storage cylinder group, and the order of pressurizing and hydrogen filling is first the hydrogen storage cylinder group with large gas storage pressure and then the hydrogen storage cylinder group with small gas storage pressure. The gas filling station further comprises a venting pipeline, which comprises a purge gas circuit and a nitrogen device connected to the purge gas circuit. The purge gas circuit is also connected to the gas unloading pipeline and an output pipeline of the hydrogen storage system.

2. A hydrogen refueling station system according to claim 1, characterized in that: The wall thickness of the hydrogen pipeline pipes of the hydrogen refueling station system shall not be less than 90% of the nominal wall thickness of the pipes; the wall thickness of the cold water pipes, vent pipes, and nitrogen pipes of the hydrogen refueling station system shall not be less than 87.5% of the nominal wall thickness of the pipes.

3. A hydrogen refueling station system according to claim 1, characterized in that: The gas filling column is also connected to the first compressor and the second compressor through a buffer tank.

4. A hydrogen refueling station system according to claim 1, characterized in that: The exhaust pressure of the first compressor is 20MPa, and the exhaust pressure of the second compressor is 45MPa; the gas storage pressure of the first hydrogen storage bottle group is 20MPa, and the gas storage pressure of the second hydrogen storage bottle group is 45MPa.

5. A hydrogen refueling station system according to claim 1, characterized in that: The nitrogen device is a nitrogen container, which is connected to the purge gas circuit through a pipeline and is used to replace hydrogen in the pipeline during maintenance to ensure safety.

6. A hydrogen refueling station system according to claim 1, characterized in that: The first hydrogen storage bottle group and the second hydrogen storage bottle group are both provided with pressure detectors to detect the pressure therein.

7. A hydrogen refueling station system according to claim 1, characterized in that: The hydrogen source of the hydrogen refueling station system comes from an alkaline water electrolysis hydrogen production project.

8. A hydrogen refueling station system according to claim 1, characterized in that: The hydrogen pipeline of the hydrogen filling station system is processed by cutting with a special cold processing saw blade, flattening with a flattening machine, deburring with a chamfering device, and threading with a CNC lathe. After processing, the pipeline is degreased with a degreasing liquid and cleaned with 95% alcohol.

9. A hydrogen refueling station system according to claim 1, characterized in that: The hydrogen filling station system also includes an in-station hydrogen production device, and the in-station hydrogen production device is connected to the gas filling column.

10. A hydrogen refueling station system according to claim 1, characterized in that: The sequential control panel is connected to a control system, and the control system stores logic instructions, and the logic instructions are used to execute the hydrogenation station system to hydrogenate the equipment to be hydrogenated.

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