Movable hydrogenation integrated pry with heat preservation function

Abstract

The utility model provides a movable hydrogenation integrated pry with a heat preservation function, which comprises a compression system for pressurizing hydrogen, the output end of the compression system is connected with a hydrogen storage system for storing high-pressure hydrogen, the output end of the hydrogen storage system is connected with a filling system, and the filling system is connected with a gas supply system. The filling system is used for being connected with a filling port of the fuel cell so as to carry out hydrogenation on the fuel cell; the compression system is an electric compressor and is used for reducing the size of the integrated pry. According to the integrated pry, the hydrogenation efficiency can be ensured, an air compressor, a hydraulic station and a gas cooling facility do not need to be arranged in the integrated pry, the weight and the appearance size of the integrated pry can be effectively reduced, and the integrated pry is convenient to move.

Description

Technical Field

[0001] This utility model relates to the field of mobile hydrogen refueling technology, specifically to a mobile hydrogen refueling integrated skid with heat preservation function. Background Technology

[0002] Hydrogen fuel cell vehicle technology, due to its high efficiency and zero emissions, has become the most ideal and promising technology to replace traditional fuel cell vehicle power systems in this century. Developing hydrogen fuel cell vehicle technology can simultaneously and completely solve the energy and environmental problems brought about by vehicle development. Hydrogen fuel cell vehicles use hydrogen as fuel, and hydrogen refueling mainly relies on hydrogen refueling stations. Hydrogen refueling stations are mainly divided into skid-mounted hydrogen refueling stations and stationary hydrogen refueling stations, with the compressor as their core facility. In skid-mounted hydrogen refueling stations, gas-driven compressors are generally used for low-flow refueling applications, while gas-driven or hydraulically driven compressors are generally used for medium-flow applications. Skid-mounted hydrogen refueling stations integrate the compressor, hydrogen dispenser, piping system, electrical system, instrumentation and control system, and safety accessories, all or part of which are integrated into a skid-mounted enclosure, facilitating installation and transportation. Stationary hydrogen refueling stations are fixed hydrogen filling facilities built by arranging the various equipment according to functional areas.

[0003] Currently, all integrated skid-mounted solutions are equipped with either air-driven or hydraulic compressors. Air-driven compressors require a separate air compressor; as flow rates increase, the power, size, and weight of the air compressor also increase, sometimes even requiring a separate air buffer tank, making the integrated skid bulky and heavy. This also makes it unsuitable for transport. When using a hydraulic compressor, a separate hydraulic station is required. The hydraulic station is large and heavy after being filled with hydraulic oil. Additionally, a hydrogen cooling system is needed, typically water-cooled. Water-cooled chillers become increasingly powerful and heavy as cooling capacity increases. Furthermore, if the water-cooled chiller is integrated into the skid, related components need explosion-proof treatment, further increasing costs. Utility Model Content

[0004] In view of this, the problem to be solved by this utility model is to provide a mobile hydrogen refueling integrated skid with heat preservation function, which can ensure hydrogen refueling efficiency without the need to equip the integrated skid with an air compressor, hydraulic station and gas cooling facilities, effectively reducing the weight and size of the integrated skid and facilitating its movement.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A mobile hydrogen refueling integrated skid with heat preservation function includes a compression system for pressurizing hydrogen, the output end of the compression system is connected to a hydrogen storage system for storing high-pressure hydrogen, the output end of the hydrogen storage system is connected to a refueling system, and the refueling system is connected to the refueling port of a fuel cell to refuel the fuel cell with hydrogen.

[0007] The compression system is an electric compressor used to reduce the size of the integrated skid.

[0008] Furthermore, the dispensing system includes a first reversing valve and a second reversing valve connected in series. The output end of the second reversing valve is connected to the dispensing gun via a hose, and the input end of the first reversing valve is connected to a first check valve.

[0009] The output ends of the first reversing valve and the second reversing valve are respectively connected to a first pressure relief valve and a second pressure relief valve. The output ends of the first pressure relief valve and the second pressure relief valve are connected to a first hydrogen storage tank. The output end of the first hydrogen storage tank is connected to a hydrogen heater for heat preservation of the internal equipment of the integrated skid.

[0010] Furthermore, the input end of the hydrogen heater is equipped with a first electrically controlled on-state valve, which is used to control whether the hydrogen heater is put into use.

[0011] Furthermore, a first flow meter and a first pressure sensor are provided between the first pressure relief valve and the second pressure relief valve to detect the amount of hydrogen added to the fuel cell.

[0012] Furthermore, the hydrogen storage system includes a second hydrogen storage tank, the hydrogen port of which is connected to the compression system via a second electrically controlled on-state valve for introducing high-pressure hydrogen into the second hydrogen storage tank.

[0013] Furthermore, the second electrically controlled on-state valve is connected in parallel with a third electrically controlled on-state valve. The third electrically controlled on-state valve is connected to the compression system through a second check valve. The compression system is connected to the refueling system through the second check valve. Both are used to provide high-pressure hydrogen to charge the fuel cell.

[0014] Furthermore, the output end of the third electrically controlled on-state valve is equipped with a second pressure sensor for detecting the output pressure of the second hydrogen storage tank.

[0015] Furthermore, the drain port of the second hydrogen storage tank is connected to a manual vent valve, the output end of which is connected to the drain port to discharge gaseous impurities accumulated in the second hydrogen storage tank.

[0016] Furthermore, the compression system is connected to a purging system and a hydrogen supply system, respectively. The purging system is used to purge impurities from the pipelines within the compression system and the hydrogen delivery pipeline.

[0017] The advantages and positive effects of this utility model are:

[0018] By equipping the integrated skid with an electric compressor to pressurize the hydrogen, there is no need to equip the integrated skid with an air compressor, a hydraulic station for water cooling of the equipment, and gas cooling facilities. This effectively reduces the weight and size of the integrated skid, making it easier to move. In addition, the electric compressor has high compression efficiency. When the pressure in the second hydrogen storage tank is insufficient, it can directly supply hydrogen at the set pressure to the fuel cell, ensuring the hydrogen refueling efficiency of the integrated skid. Attached Figure Description

[0019] 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:

[0020] Figure 1 This is an overall system diagram of a mobile hydrogen refueling integrated skid with heat preservation function according to this utility model.

[0021] In the diagram: 1. Integrated skid; 2. Hydrogen storage system; 201. Manually operated valve; 202. Second check valve; 203. Third electrically operated valve; 204. Second electrically operated valve; 205. Second pressure sensor; 206. Second hydrogen storage tank; 207. First check valve; 3. Refueling system; 301. First directional valve; 302. First flow meter; 303. First pressure sensor; 304. Second directional valve; 305. Hoses; 306. Second pressure relief valve; 307. First pressure relief valve; 308. First hydrogen storage tank; 309. First electrically operated valve; 310. Hydrogen heater. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] This utility model provides a mobile integrated hydrogen refueling skid with heat preservation function, such as Figure 1 As shown, the integrated skid 1 with its container structure houses a compression system, a hydrogen storage system 2, and a refueling system 3. The compression system is connected to a gas source system for providing hydrogen, receiving and pressurizing the hydrogen. Preferably, the compression system is an electric compressor. Compared to pneumatic or hydraulic compressors, this eliminates the need for air compressor cooling facilities or a hydraulic station for powering a hydraulic compressor in the integrated skid 1, saving installation space and reducing its size and weight. Furthermore, the electric compressor has high compression efficiency, allowing it to directly supply hydrogen at a set pressure to the fuel cell when the pressure in the second hydrogen storage tank 206 is insufficient, ensuring the refueling efficiency of the integrated skid 1.

[0026] The output of the compression system is connected to both the hydrogen storage system 2 and the purging system. The purging system is used to purge impurities from the pipelines within the compression system and the hydrogen delivery pipeline to prevent blockages. The hydrogen storage system 2 stores high-pressure hydrogen. When the fuel cell is refueled, a pressure difference is created between the hydrogen pressure in the storage system 2 and the hydrogen pressure inside the fuel cell. The high-pressure hydrogen automatically moves to the low-pressure area until the pressures at both ends are exactly the same or the set pressure of the fuel cell is reached (this process is called equilibrium hydrogen refueling).

[0027] The hydrogen storage system 2 includes a second hydrogen storage tank 206 for storing hydrogen. The second hydrogen storage tank 206 includes a hydrogen port for hydrogen flow and a vent port for impurity air flow. One end of a second electrically controlled on-state valve 204 is connected to the hydrogen port, and the other end of the second electrically controlled on-state valve 204 is connected to a compression system. When the second electrically controlled on-state valve 204 is open, hydrogen is introduced into the second hydrogen storage tank 206.

[0028] The hydrogen port is also connected to one end of the third electrically controlled valve 203 (the third electrically controlled valve 203 is connected in parallel with the second electrically controlled valve 204). The other end of the third electrically controlled valve 203 is connected to the refueling system 3 and the compression system respectively, so that the second hydrogen storage tank 206 can supply hydrogen to the refueling system 3 independently, or the hydrogen from the second hydrogen storage tank 206 and the output of the compression system can be combined to supply hydrogen to the refueling system 3 together, thereby reducing the rate of pressure drop in the second hydrogen storage tank 206 and ensuring hydrogen refueling efficiency when refueling the fuel cell for a long time.

[0029] The hydrogen port is also equipped with a second pressure sensor 205, used to detect the pressure of hydrogen in the second hydrogen storage tank 206 or the output pressure of the second hydrogen storage tank 206. Based on the pressure in the second hydrogen storage tank 206, the sensor controls the third electrically controlled valve 203 or the second electrically controlled valve 204 to open, thereby controlling the filling or releasing of hydrogen in the second hydrogen storage tank 206. Preferably, the third electrically controlled valve 203 is connected to the compression system through a second one-way valve 202 to prevent hydrogen backflow.

[0030] The drain port of the second hydrogen storage tank 206 is connected to a manual valve 201. The output end of the manual valve 201 is connected to the drain port. After the second hydrogen storage tank 206 has been used for a period of time, the manual valve 201 can be manually opened to discharge the gaseous impurities accumulated in the second hydrogen storage tank 206 (hydrogen is the lightest gas, and impurity gases should be deposited at the bottom of the second hydrogen storage tank 206).

[0031] The refueling system 3 includes a first reversing valve 301 and a second reversing valve 304 connected in series. The input end of the first reversing valve 301 is equipped with a first check valve 207 for partial hydrogen recirculation. The output end of the second reversing valve 304 is connected to one end of a hose 305, and the other end of the hose 305 is connected to a refueling gun, which is used to connect to the fuel cell's refueling port. During hydrogen refueling, the hydrogen output from the hydrogen storage system 2 passes sequentially through the first check valve 207, the first reversing valve 301, the second reversing valve 304, the hose 305, and the refueling gun before entering the fuel cell. To facilitate the calculation of the amount of hydrogen added to the fuel cell, a first flow meter 302 and a first pressure sensor 303 are installed between the first pressure relief valve 307 and the second pressure relief valve 306. The amount of hydrogen added is calculated based on the flow rate and pressure of the flowing hydrogen. Because gases are highly compressible, the amount of hydrogen is calculated by combining the flow rate and pressure.

[0032] The outputs of the first reversing valve 301 and the second reversing valve 304 are respectively connected to the first pressure relief valve 307 and the second pressure relief valve 306. When the pressure of hydrogen in the second hydrogen storage tank 206 differs too much from the storage pressure of the fuel cell, the fuel cell is filled with hydrogen too quickly. After the second hydrogen storage tank 206 is filled, the hydrogen pressure in the hose 305 is too high. If high-pressure gas is stored in the hose 305 for a long time, it will affect the service life of the hose 305 (the hose 305 is prone to damage and leakage). The output of the second reversing valve 304 is connected to the second pressure relief valve 306. The output of the second pressure relief valve 306 is connected to the vent port for the discharge of excess hydrogen in the hose 305.

[0033] Because the pressure of hydrogen is greatly affected by temperature, a hydrogen heater 310 is installed inside the integrated skid 1 to insulate the internal equipment of the integrated skid 1, ensuring the accuracy of the hydrogen addition. To make efficient use of excess hydrogen in the hose 305, the hydrogen heater 310 is connected to the output of the second pressure relief valve 306. Since the hydrogen heater 310 is typically used in cold winters, a first hydrogen storage tank 308 is connected to the output of the second pressure relief valve 306 to store excess hydrogen in the hose 305, which is then released for use when needed.

[0034] The output of the first reversing valve 301 is connected to a first pressure relief valve 307, which is connected to the output of the first hydrogen storage tank 308. When the hydrogen stored in the first hydrogen storage tank 308 is used up or insufficient, the second reversing valve 304 can be closed (both the first and second reversing valves 301 and 304 are two-position, two-tank reversing valves; when the first and second reversing valves 301 and 304 are switched, they are not conductive), and the first reversing valve 301 is open, promptly introducing hydrogen into the first hydrogen storage tank 308. The input of the hydrogen heater 310 is equipped with a first electrically controlled on-state valve 309, used to control whether the hydrogen heater 310 is in use.

[0035] The working principle and process of this utility model are as follows:

[0036] When the hydrogen pressure stored in the second hydrogen storage tank 206 is sufficient, the second hydrogen storage tank 206 supplies hydrogen to the fuel cell independently. The third electronic control is activated, and the hydrogen in the second hydrogen storage tank 206 sequentially passes through the second one-way valve 202, the first one-way valve 207, the first reversing valve 301, the second reversing valve 304, the hose 305, and the filling nozzle before entering the fuel cell. After the fuel cell finishes refueling, if the pressure in the hose 305 exceeds the set value, the second pressure relief valve 306 is activated, and the excess hydrogen in the hose 305 is stored in the first hydrogen storage tank 308.

[0037] After multiple hydrogen refills, the pressure inside the second hydrogen storage tank 206 decreases. To ensure the refilling rate, the electric compressor and the second hydrogen storage tank 206 work together to supply hydrogen to the fuel cell. The third electrical control is activated, simultaneously turning on the electric compressor. The electric compressor and the second hydrogen storage tank 206 discharge hydrogen (at this point, the pressure inside the second hydrogen storage tank 206 is greater than the pressure of the fuel cell after it is fully filled). The hydrogen passes sequentially through the second one-way valve 202, the first one-way valve 207, the first reversing valve 301, the second reversing valve 304, the hose 305, and the refill nozzle before entering the fuel cell. This ensures the refilling rate while reducing the rate of hydrogen consumption in the second hydrogen storage tank 206.

[0038] The pressure value of the second pressure sensor 205 is constantly acquired, and the pressure of the hydrogen output by the electric compressor is adjusted according to the pressure value of the hydrogen in the second hydrogen storage tank 206. When the pressure of the hydrogen in the second hydrogen storage tank 206 is not higher than the pressure after the fuel cell is fully filled, the second one-way valve 202 cannot be opened, and only the electric compressor supplies hydrogen at the set pressure to the fuel cell.

[0039] 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 integrated hydrogen refueling skid with heat preservation function, characterized in that, It includes a compression system for pressurizing hydrogen, the output of which is connected to a hydrogen storage system (2) for storing high-pressure hydrogen, the output of which is connected to a refueling system (3), which is connected to the refueling port of the fuel cell to refuel the fuel cell with hydrogen; The compression system is an electric compressor used to reduce the volume of the integrated skid (1); The filling system (3) includes a first reversing valve (301) and a second reversing valve (304) connected in series. The output end of the second reversing valve (304) is connected to the filling gun through a hose (305). The input end of the first reversing valve (301) is connected to a first check valve (207). The output ends of the first reversing valve (301) and the second reversing valve (304) are respectively connected to the first pressure relief valve (307) and the second pressure relief valve (306). The output ends of the first pressure relief valve (307) and the second pressure relief valve (306) are connected to the first hydrogen storage tank (308). The output end of the first hydrogen storage tank (308) is connected to the hydrogen heater (310) for heat preservation of the internal equipment of the integrated skid (1).

2. The mobile hydrogen refueling integrated skid with heat preservation function according to claim 1, characterized in that, The hydrogen heater (310) is equipped with a first electrically controlled on-state valve (309) at its input end, which is used to control whether the hydrogen heater (310) is put into use.

3. A mobile hydrogen refueling integrated skid with heat preservation function according to claim 1, characterized in that, A first flow meter (302) and a first pressure sensor (303) are provided between the first pressure relief valve (307) and the second pressure relief valve (306) to detect the amount of hydrogen added to the fuel cell.

4. A mobile hydrogen refueling integrated skid with heat preservation function according to claim 1, characterized in that, The hydrogen storage system (2) includes a second hydrogen storage tank (206), and the hydrogen port of the second hydrogen storage tank (206) is connected to the compression system through a second electrically controlled on-line valve (204) for introducing high-pressure hydrogen into the second hydrogen storage tank (206).

5. A mobile hydrogen refueling integrated skid with heat preservation function according to claim 4, characterized in that, The second electrically controlled on-off valve (204) is connected to a third electrically controlled on-off valve (203). The third electrically controlled on-off valve (203) is connected to the compression system and the filling system (3) respectively through the second one-way valve (202). The compression system and the filling system (3) jointly provide high-pressure hydrogen to fill the fuel cell.

6. A mobile hydrogen refueling integrated skid with heat preservation function according to claim 5, characterized in that, The output end of the third electrically controlled on-state valve (203) is equipped with a second pressure sensor (205) for detecting the output pressure of the second hydrogen storage tank (206).

7. A mobile hydrogen refueling integrated skid with heat preservation function according to claim 6, characterized in that, The drain port of the second hydrogen storage tank (206) is connected to a manual control valve (201), the output end of which is connected to the drain port to discharge the gaseous impurities accumulated in the second hydrogen storage tank (206).

8. A mobile hydrogen refueling integrated skid with heat preservation function according to claim 1, characterized in that, The compression system is connected to a purging system and a hydrogen supply system. The purging system is used to purge impurities from the pipelines within the compression system and the hydrogen delivery pipelines.

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