Movable hydrogenation device capable of being externally connected with hydrogen production equipment

Abstract

The utility model provides a mobile hydrogenation device capable of being externally connected with hydrogen production equipment, which comprises a gas source system used for providing hydrogen, the output end of the gas source system is connected with a pressurization system, the output end of the pressurization system is connected with a hydrogen storage system, the output end of the hydrogen storage system is connected with a filling system, and the filling system is connected with a hydrogen storage system. The filling system is used for being connected with a filling port of a fuel cell so as to perform hydrogenation on the fuel cell; the pressurization system comprises a low-pressure pressurization system and a high-pressure pressurization system which are respectively connected with the gas source system, the output end of the low-pressure pressurization system is connected with the high-pressure pressurization system, the low-pressure pressurization system is used for carrying out primary pressurization treatment on hydrogen, and the high-pressure pressurization system is used for carrying out secondary pressurization treatment on the high-pressure pressurization system. The utility model can be used.

Description

Technical Field

[0001] This utility model relates to the field of mobile hydrogen refueling technology, specifically to a mobile hydrogen refueling device that can be connected to an external hydrogen production device. Background Technology

[0002] Currently, all skid-mounted plant technical solutions are equipped with either air-driven or liquid-driven compressors. Air-driven compressors require a separate air compressor. When using liquid-driven or air-driven compressors, the required inlet pressure varies depending on the drive method and output pressure requirements. Generally, the minimum inlet pressure for liquid-driven compressors is 5 MPa, while the inlet pressure for air-driven compressors can be as low as approximately 2 MPa. However, the boosting efficiency is low in the 2 MPa to 5 MPa inlet range, and frequent use of the compressor at the low-pressure end affects its service life. Utility Model Content

[0003] In view of this, the problem to be solved by this utility model is to provide a mobile hydrogen refueling device that can be connected to an external hydrogen production equipment, which can pressurize a low-pressure gas source, improve gas utilization, increase pressurization efficiency, and reduce operating costs.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A mobile hydrogen refueling device that can be connected to an external hydrogen production equipment includes a gas source system for providing hydrogen, an output end of the gas source system connected to a pressurization system, an output end of the pressurization system connected to a hydrogen storage system, an output end of the hydrogen storage system connected to a refueling system, and the refueling system being connected to the refueling port of a fuel cell to refuel the fuel cell with hydrogen.

[0006] The system is characterized in that it includes a low-pressure boosting system and a high-pressure boosting system, which are respectively connected to a gas source system. The output end of the low-pressure boosting system is connected to the high-pressure boosting system. The low-pressure boosting system is used to perform a primary boosting process on hydrogen, and the high-pressure boosting system is used to perform a secondary boosting process on the high-pressure boosting system.

[0007] Furthermore, a buffer tank is provided between the low-pressure boosting system and the high-pressure boosting system to store hydrogen after one boosting process.

[0008] Furthermore, the gas source system includes a long-tube trailer gas source, a cylinder group gas source, and a hydrogen production module.

[0009] Furthermore, the output end of the gas source system is connected to a constant pressure reversing valve, which includes a pneumatic control valve. The pneumatic control valve is connected to the output end of the gas source system and is used to control the constant pressure reversing valve to switch according to the output gas pressure of the gas source system.

[0010] Furthermore, the constant pressure directional valve is a two-position three-way solenoid directional valve.

[0011] Furthermore, the low-pressure booster system is connected to a purging system.

[0012] Furthermore, the refueling system includes a first through valve connected to the output end of the hydrogen storage system. A pressure relief valve is connected in parallel to the output end of the first through valve, and an vent is provided at the output end of the pressure relief valve for discharging excess hydrogen.

[0013] Furthermore, the injection system includes a filling gun for connecting to the filling port. The filling gun is connected in series with the output end of the first control valve via a hose. A first flow meter and a second pressure sensor are provided between the filling gun and the first control valve to detect the flow rate and pressure of hydrogen.

[0014] The advantages and positive effects of this utility model are:

[0015] By connecting a low-pressure booster system and a high-pressure booster system to the output of the gas source system, and connecting the output of the low-pressure booster system to the input of the high-pressure booster system, the low-pressure booster system is used to perform a primary booster treatment on hydrogen gas at a pressure not exceeding 5 MPa. The hydrogen gas is then fed into the high-pressure booster system for a secondary booster treatment, which effectively improves the utilization rate and booster efficiency of hydrogen gas and reduces the cost of use. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is an overall system diagram of a mobile hydrogen refueling device that can be connected to an external hydrogen production unit, according to this utility model.

[0018] In the diagram: 1. Gas source system; 2. Constant pressure reversing valve; 3. Pressurization system; 4. Hydrogen storage system; 5. Refueling system; 501. First directional valve; 502. Pressure relief valve; 503. Second pressure sensor; 504. First flow meter; 505. Hoses; 506. Refueling gun; 6. Refueling port; 7. Purge system. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] This utility model provides a mobile hydrogen refueling device that can be connected to an external hydrogen production equipment, such as... Figure 1 As shown, it includes a gas source system 1 for providing hydrogen, a pressurization system 3 for pressurizing hydrogen, a hydrogen storage system 4 for storing hydrogen, and a refueling system 5 for connecting to the fuel cell refueling port 6.

[0023] The gas source system 1 can be a long-tube trailer gas source, a cylinder gas source, or a hydrogen production module. The long-tube trailer gas source consists of hydrogen tanks installed on a trailer, which are connected to the compression system via flexible long tubes to supply hydrogen to the compression system. The cylinder gas source consists of several hydrogen tanks for storing hydrogen, and is integrally formed with the pressurization system 3, hydrogen storage system 4, and refueling system 5. The cylinder gas source, pressurization system 3, hydrogen storage system 4, and refueling system 5 are integrated and installed within an integrated skid of a container structure, thus forming a mobile hydrogen refueling unit. Preferably, the cylinder gas source is located inside the integrated skid. When the mobile hydrogen refueling unit needs to be moved, there is no need to repeatedly disassemble and reassemble the cylinder gas source, reducing the risk of leakage or connection failure and improving the safety of the cylinder gas source. The hydrogen production module is now an electrolytic hydrogen production device. However, the hydrogen pressure produced by the electrolytic hydrogen production device is low, or when the hydrogen content in the hydrogen tank is low, the hydrogen pressure decreases, which makes it impossible for the compressor to effectively compress the low-pressure gas. This affects the gas utilization rate and the performance of the compressor.

[0024] A low-pressure boosting system and a high-pressure boosting system are set up in the boosting system 3. The input terminals of both the low-pressure boosting system and the high-pressure boosting system are connected to the gas source system 1. The output terminal of the low-pressure boosting system is connected to the input terminal of the high-pressure boosting system. The low-pressure boosting system performs a first boosting process on hydrogen gas (low-pressure hydrogen) with a pressure lower than five MPa, and then inputs it to the high-pressure boosting system for a second boosting process. If the pressure of the hydrogen gas output by the gas source system 1 is greater than five MPa (high-pressure hydrogen), the high-pressure hydrogen can be directly introduced into the high-pressure boosting system.

[0025] The mobile hydrogen refueling unit can be refueled via several methods, including refueling through the pressure difference between hydrogen in the hydrogen storage system 4 and hydrogen in the fuel cell, directly supplying hydrogen at a set pressure to the fuel cell via a high-pressure boosting system, or a combination of both methods. When hydrogen is supplied to the mobile refueling unit by a hydrogen production device, the device may not be able to provide enough hydrogen in a timely manner. Therefore, a buffer tank is installed between the low-pressure boosting system and the high-pressure boosting system. The low-pressure boosting system continuously compresses and stores the low-pressure hydrogen produced by the hydrogen production device in the buffer tank. When the high-pressure boosting system is needed to directly refuel the fuel cell (if the hydrogen pressure stored in the gas source system 1 is insufficient), the high-pressure boosting system can directly obtain high-pressure hydrogen from the buffer tank to refuel the fuel cell.

[0026] Preferably, the output end of the gas source system 1 is connected to a constant pressure reversing valve 2, and the input end of the constant pressure reversing valve 2 is equipped with a first pressure sensor to detect the pressure of the hydrogen output by the gas source system 1. The constant pressure reversing valve 2 is a two-position three-way pneumatically controlled reversing valve, which is controlled by the gas pressure at the output end of the gas source system 1. When the pressure of the hydrogen output by the gas source system 1 is higher than the set threshold, the constant pressure reversing valve 2 reverses to allow the hydrogen to enter the high-pressure booster system 3; otherwise, the constant pressure reversing valve 2 does not reverse to allow the hydrogen to enter the low-pressure booster system 3 (hydrogen production equipment usually produces hydrogen continuously around the clock).

[0027] To prevent the pressurization system 3 and hydrogen storage system 4 from becoming clogged due to dust, the input end of the low-pressure pressurization system 3 is connected to a purging system 7, which can purge the low-pressure pressurization system, buffer tank, high-pressure pressurization system, hydrogen storage system 4 and refueling system 5 in sequence. Nitrogen gas, which does not readily undergo chemical reactions, is typically used for purging.

[0028] The refueling system 5 is equipped with a first on-off valve 501 at its input end, which is connected to the output end of the hydrogen storage system 4 to control whether the refueling system 5 is in use. A pressure relief valve 502 is connected in parallel to the output end of the first on-off valve 501. The output end of the pressure relief valve 502 has an vent. When the hydrogen pressure added to the fuel cell exceeds the set fixed pressure (higher than the fuel cell's storage pressure) during hydrogen refueling, the pressure relief valve 502 opens, releasing the excess hydrogen through the vent.

[0029] The refueling system 5 includes a refueling gun 506 for connection to the refueling port 6. The refueling gun 506 is connected in series with the output end of the first control valve 501 via a hose 505. The user removes the refueling gun 506 from the portable hydrogen refueling unit (outside the container) and connects it to the refueling port 6 of the fuel cell. A first flow meter 504 and a second pressure sensor 503 are installed between the refueling gun 506 and the first control valve 501 to detect the flow rate and pressure of hydrogen in order to calculate the cost of refueling.

[0030] The working principle and process of this utility model are as follows:

[0031] When the hydrogen pressure provided by the gas source system 1 is higher than the set threshold, the constant pressure reversing valve 2 reverses, and the high pressure boosting system is connected to the gas source system 1. The hydrogen is then pressurized and stored in the hydrogen storage system 4, or directly used to charge the fuel cell.

[0032] When the hydrogen pressure provided by the gas source system 1 is lower than the set threshold, the constant pressure reversing valve 2 returns to its normal position, and the low-pressure boosting system is connected to the gas source system 1. The hydrogen is pressurized once in the low-pressure boosting system and then stored in the buffer tank. When the hydrogen storage system 4 needs to be replenished with hydrogen or the fuel cell needs to be directly charged by the high-pressure boosting system, the high-pressure boosting system 3 can directly obtain the hydrogen stored in the buffer tank.

[0033] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A mobile hydrogen refueling device that can be connected to an external hydrogen production device, comprising a gas source system (1) for providing hydrogen, wherein the output end of the gas source system (1) is connected to a pressurization system (3), the output end of the pressurization system (3) is connected to a hydrogen storage system (4), the output end of the hydrogen storage system (4) is connected to a refueling system (5), and the refueling system (5) is used to connect to the refueling port (6) of a fuel cell to refuel the fuel cell with hydrogen; characterized in that The pressurization system (3) includes a low-pressure pressurization system and a high-pressure pressurization system respectively connected to the gas source system (1). The output end of the low-pressure pressurization system is connected to the high-pressure pressurization system. The low-pressure pressurization system is used to perform a primary pressurization process on hydrogen, and the high-pressure pressurization system is used to perform a secondary pressurization process on the high-pressure pressurization system. The output end of the gas source system (1) is connected to a constant pressure reversing valve (2). The constant pressure reversing valve (2) includes a pneumatic control valve. The pneumatic control valve is connected to the output end of the gas source system (1) and is used to control the constant pressure reversing valve (2) to switch according to the output gas pressure of the gas source system (1).

2. The mobile hydrogenation device capable of being externally connected to a hydrogen production device according to claim 1, characterized in that, A buffer tank is provided between the low-pressure boosting system and the high-pressure boosting system to store hydrogen after one boosting process.

3. The mobile hydrogenation device of claim 1, wherein, The gas source system (1) includes a long-tube trailer gas source, a cylinder group gas source and a hydrogen production module.

4. The mobile hydrogenation device of claim 1, wherein, The constant pressure reversing valve (2) is a two-position three-way pneumatic reversing valve.

5. The mobile hydrogenation device of claim 1, wherein, The low-pressure booster system (3) is connected to a purging system (7).

6. The mobile hydrogenation device of claim 1, wherein, The refueling system (5) includes a first conducting valve (501) connected to the output end of the hydrogen storage system (4). A pressure relief valve (502) is connected in parallel to the output end of the first conducting valve (501). The output end of the pressure relief valve (502) is connected to an vent for discharging excess hydrogen.

7. The mobile hydrogenation device of claim 1, wherein, The filling system (5) includes a filling gun (506) for connecting to the filling port (6). The filling gun (506) is connected in series with the output end of the first control valve (501) via a hose (505). A first flow meter (504) and a second pressure sensor (503) are provided between the filling gun (506) and the first control valve (501) for detecting the flow rate and pressure of hydrogen.

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