Heat exchange hydrogenation charging system for liquid hydrogen skid-mounted hydrogen refueling station

Abstract

The utility model relates to the technical field of liquid hydrogen storage, in particular to a heat exchange hydrogenation charging system for a liquid hydrogen skid-mounted hydrogen refueling station. The bottom of the liquid hydrogen storage tank is connected with a liquid inlet of the self-booster through a self-boosting pipeline, a gas outlet of the self-booster is connected with the top of the liquid hydrogen storage tank through a gas pipeline, the top of the liquid hydrogen storage tank is connected with the vaporizer, the vaporizer is connected with the first hydrogen storage bottle set through a pipeline, and the first hydrogen storage bottle set is connected with the hydrogen fuel cell. The hydrogen fuel cell is connected with the charging pile; the bottom of the liquid hydrogen storage tank is connected with a booster cavity liquid inlet of a plunger pump through a liquid inlet pipeline, a liquid outlet of the plunger pump is connected with a heat exchanger through a pipeline, the heat exchanger is connected with a second hydrogen storage bottle group through a pipeline, the second hydrogen storage bottle group is connected with a hydrogen cooler, and the hydrogen cooler is connected with a hydrogen hydrogenation machine; the self-booster does not need to be additionally provided with a booster pump, electric energy is saved, the plunger pump has the advantages of being high in pressure and large in flow, the hydrogenation speed is high, and the hydrogenation requirement can be met in the hydrogenation peak period.

Description

Technical fields:

[0001] This utility model relates to the field of liquid hydrogen storage technology, and in particular to a heat exchange hydrogen refueling and charging system for a liquid hydrogen skid-mounted hydrogen refueling station. Background technology:

[0002] Currently, most hydrogen refueling skid-mounted stations only have hydrogen refueling capabilities, which is relatively limited. Given the small market share of hydrogen fuel cell vehicles compared to the large market share of electric vehicles, charging infrastructure is severely inadequate. If hydrogen could be used to generate electricity at hydrogen refueling skid-mounted stations and then used to charge electric vehicles via charging piles, it would greatly supplement the existing charging infrastructure and fully utilize the energy and space advantages of the hydrogen refueling skid-mounted stations.

[0003] In addition, during the actual hydrogen storage process, some liquid hydrogen will vaporize, generating hydrogen flash vapor at the top of the liquid hydrogen storage tank. This part of the gas is not fully utilized in the liquid hydrogen storage tank, resulting in waste. Moreover, since the pressure of the hydrogen flash vapor in the liquid hydrogen storage tank is not high, if these gases are to be utilized, a booster pump needs to be installed to pressurize the gas before it is transported out, which increases the additional power consumption.

[0004] Furthermore, when liquid hydrogen is transported outward from the bottom of the liquid hydrogen storage tank, ordinary booster pumps are generally used. Ordinary booster pumps have low pressure and small flow rate. During peak hydrogen refueling periods when the demand for hydrogen is high, the waiting time is long and cannot meet the demand for large-flow hydrogen refueling.

[0005] Finally, when liquid hydrogen vaporization and hydrogen fuel cell system components are working, some components require a cold source and some require a heat source. If heat exchange could be achieved between these components, a large amount of energy could be saved. There is currently no good solution to the above problem.

[0006] In summary, the aforementioned problems in liquid hydrogen skid-mounted refueling stations have become urgent technical challenges that need to be addressed within the industry. Utility Model Content:

[0007] To overcome the shortcomings of the prior art, this utility model provides a heat exchange hydrogen refueling and charging system for a liquid hydrogen skid-mounted hydrogen refueling station. It solves the problem that a separate booster pump is needed to pressurize the hydrogen flash vapor, the problem that the booster pump cannot meet the high flow rate hydrogen refueling demand during peak hydrogen refueling periods, and the problem of fully utilizing heat exchange between various components in the hydrogen refueling skid-mounted station.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0009] A heat exchange hydrogen refueling and charging system for a liquid hydrogen skid-mounted hydrogen refueling station includes a liquid hydrogen storage tank. The bottom of the liquid hydrogen storage tank is filled with liquid hydrogen, and the top is filled with hydrogen flash vapor. The bottom of the liquid hydrogen storage tank is connected to the inlet of a self-pressurizing device via a self-pressurizing pipeline. The outlet of the self-pressurizing device is then connected to the top of the liquid hydrogen storage tank via a gas pipeline. The top of the liquid hydrogen storage tank is then connected to the inlet of a vaporizer via one pipeline. The outlet of the vaporizer is connected to a first hydrogen storage cylinder group via another pipeline. The outlet of the heat exchanger is connected to the first hydrogen storage cylinder group. The first hydrogen storage cylinder group is then connected to a hydrogen fuel cell via a pipeline. The hydrogen fuel cell is connected to a charging pile.

[0010] The bottom of the liquid hydrogen storage tank is connected to the inlet of the pressurization chamber of the plunger pump via an inlet pipe. The exhaust port at the top of the pressurization chamber of the plunger pump is connected to the liquid hydrogen storage tank via a return gas pipe. The return gas pipe inside the liquid hydrogen storage tank extends to the top. The outlet of the plunger pump is connected to the inlet of the heat exchanger via a pipe. The outlet of the heat exchanger is connected to the second hydrogen storage cylinder group via a pipe. The second hydrogen storage cylinder group is connected to the hydrogen cooler via a pipe. The hydrogen cooler is then connected to the hydrogen refueling machine via a pipe.

[0011] The heat exchanger is connected to the heat source generated by the hydrogen fuel cell for heat exchange, and the hydrogen cooler is connected to the heat exchanger for heat exchange.

[0012] A one-way valve is installed on the pipeline connected to the top rear side of the liquid hydrogen storage tank.

[0013] The self-pressurizer is an air bath vaporizer.

[0014] The second hydrogen storage cylinder assembly is connected to the hydrogen fuel cell via a pipeline and a pressure reducing valve.

[0015] The heat source generated by the hydrogen fuel cell is connected to the heating components.

[0016] The hydrogen fuel cell is also connected to a lithium battery.

[0017] The present invention adopts the above solution and has the following advantages:

[0018] By installing a self-pressurizing device between the bottom and top of the liquid hydrogen storage tank, the liquid hydrogen at the bottom of the tank can flow into the self-pressurizing device through the self-pressurizing pipeline under its own gravity for vaporization. The vaporized hydrogen is then replenished to the top of the liquid hydrogen storage tank, increasing the hydrogen flash vapor pressure at the top of the tank. This eliminates the need for a separate booster pump, saving energy consumption. After opening the pipeline valve, one path of this hydrogen flash vapor can automatically enter the vaporizer through a one-way valve for re-vaporization, and then enter the hydrogen storage cylinder group. Another path can enter the heat exchanger through a one-way valve. The heat exchanger is connected to the heat source generated by the hydrogen fuel cell for heat exchange, re-vaporizing the hydrogen flash vapor, and then entering the hydrogen storage cylinder group. The hydrogen storage cylinder group then supplies hydrogen to the hydrogen fuel cell. The electricity generated by the hydrogen fuel cell during operation can be supplied to the charging pile to enable the charging function of electric vehicles.

[0019] By using a plunger pump, it has the advantages of high pressure and large flow rate, and the hydrogen refueling speed is fast. It can also meet the high flow rate hydrogen refueling demand during peak hydrogen refueling periods. Liquid hydrogen in the liquid hydrogen storage tank enters the pressurization chamber of the plunger pump through the liquid inlet pipeline. In the pressurization chamber, it is pressurized, and some of the liquid hydrogen will be vaporized. The generated hydrogen gas enters the top of the liquid hydrogen storage tank through the return gas pipeline for storage. The plunger pump pumps the liquid hydrogen into the heat exchanger for vaporization and then supplies it to the hydrogen storage cylinder group. The hydrogen storage cylinder group then supplies the hydrogen gas to the hydrogen dispenser, realizing the rapid hydrogen refueling function.

[0020] The heat exchanger can exchange heat with the hydrogen fuel cell and with the hydrogen cooler. In this way, the hydrogen refueling skid station of this invention integrates charging and fast hydrogen refueling functions, makes full use of the space of the hydrogen refueling skid station, and allows for full heat exchange between the hydrogen fuel cell, heat exchanger and hydrogen cooler, saving a lot of energy. Attached image description:

[0021] Figure 1 This is a schematic diagram of the structural principle of this utility model.

[0022] In the diagram, 1. Liquid hydrogen storage tank, 2. Self-pressurizing pipeline, 3. Self-pressurizer, 4. Gas pipeline, 5. Vaporizer, 6. First hydrogen storage tank group, 7. Heat exchanger, 8. Hydrogen fuel cell, 9. Charging pile, 10. Liquid inlet pipeline, 11. Plunger pump, 12. Gas return pipeline, 13. Second hydrogen storage tank group, 14. Hydrogen cooler, 15. Hydrogen refueling machine, 16. Check valve, 17. Pressure reducing valve, 18. Heating components, 19. Lithium battery. Detailed implementation method:

[0023] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0024] like Figure 1As shown, a heat exchange hydrogen refueling and charging system for a liquid hydrogen skid-mounted hydrogen refueling station includes a liquid hydrogen storage tank 1. The bottom of the liquid hydrogen storage tank 1 is filled with liquid hydrogen, and the top is filled with hydrogen flash vapor. The bottom of the liquid hydrogen storage tank 1 is connected to the inlet of a self-pressurizing device 3 through a self-pressurizing pipeline 2. The outlet of the self-pressurizing device 3 is then connected to the top of the liquid hydrogen storage tank 1 through a gas pipeline 4. The top of the liquid hydrogen storage tank 1 is then connected to the inlet of a vaporizer 5 through one pipeline. The outlet of the vaporizer 5 is connected to a first hydrogen storage cylinder group 6 through a pipeline, and the other pipeline is connected to the inlet of a heat exchanger 7. The outlet of the heat exchanger 7 is connected to the first hydrogen storage cylinder group 6 through a pipeline. The first hydrogen storage cylinder group 6 is then connected to a hydrogen fuel cell 8 through a pipeline. The hydrogen fuel cell 8 is connected to a charging pile 9.

[0025] The bottom of the liquid hydrogen storage tank 1 is connected to the inlet of the pressurization chamber of the plunger pump 11 via the liquid inlet pipe 10. The exhaust port at the top of the pressurization chamber of the plunger pump 11 is connected to the liquid hydrogen storage tank 1 via the return gas pipe 12. The return gas pipe 12 in the liquid hydrogen storage tank 1 extends to the top. The discharge port of the plunger pump 11 is connected to the inlet of the heat exchanger 7 via a pipe. The outlet of the heat exchanger 7 is connected to the second hydrogen storage cylinder group 13 via a pipe. The second hydrogen storage cylinder group 13 is connected to the hydrogen cooler 14 via a pipe. The hydrogen cooler 14 is then connected to the hydrogen refueling machine 15 via a pipe.

[0026] The heat exchanger 7 is connected to the heat source generated by the hydrogen fuel cell 8 for heat exchange, and the hydrogen cooler 14 is connected to the heat exchanger 7 for heat exchange.

[0027] A one-way valve 16 is installed on the pipeline connected to the top rear side of the liquid hydrogen storage tank 1 to prevent hydrogen flash vapor backflow.

[0028] The self-pressurizer 3 uses an air bath vaporizer, which automatically heats the liquid hydrogen by utilizing the flow of air, without requiring additional energy consumption.

[0029] The second hydrogen storage cylinder group 13 is connected to the hydrogen fuel cell 8 via a pipeline and a pressure reducing valve 17. The high-pressure hydrogen in the second hydrogen storage cylinder group 13 is reduced in pressure by the pressure reducing valve 17 and can then be supplied to the hydrogen fuel cell 8 for use.

[0030] The heat source generated by the hydrogen fuel cell 8 is connected to the heating component 18, which can provide heating for the areas in need.

[0031] The hydrogen fuel cell 8 is also connected to a lithium battery 19, which can charge the lithium battery 19 and provide electrical energy for the operation of the hydrogen fuel cell 8.

[0032] Working principle:

[0033] Liquid hydrogen at the bottom of liquid hydrogen storage tank 1 flows into self-pressurizing device 3 through self-pressurizing pipeline 2 under its own gravity for vaporization. The vaporized hydrogen is then fed into the top of liquid hydrogen storage tank 1 through gas pipeline 4, increasing the hydrogen flash vapor pressure at the top of liquid hydrogen storage tank 1. No additional booster pump is needed, saving energy consumption. After opening the pipeline valve, one branch of this hydrogen flash vapor can automatically enter vaporizer 5 through one-way valve 16 for re-vaporization, and then enter the first hydrogen storage cylinder group 6. Another branch of hydrogen flash vapor can enter heat exchanger 7 through one-way valve 16. Heat exchanger 7 is connected to the heat source generated by hydrogen fuel cell 8 for heat exchange, re-vaporizing the hydrogen flash vapor, which also enters the first hydrogen storage cylinder group 6. The first hydrogen storage cylinder group 6 then supplies hydrogen to hydrogen fuel cell 8. The electrical energy generated when hydrogen fuel cell 8 is working can be supplied to charging pile 9 to realize the charging function of electric vehicle.

[0034] Liquid hydrogen from the bottom of liquid hydrogen storage tank 1 enters the pressurization chamber of plunger pump 11 through inlet pipe 10. It is pressurized in the pressurization chamber. During the pressurization process, some liquid hydrogen will vaporize. The generated hydrogen gas enters the top of liquid hydrogen storage tank 1 through return pipe 12 for storage to avoid affecting the normal operation of plunger pump 11. Plunger pump 11 then pumps liquid hydrogen into heat exchanger 7 for vaporization. The vaporized hydrogen gas enters the second hydrogen storage cylinder group 13 for storage. The high-pressure hydrogen gas in the second hydrogen storage cylinder group 13 first enters hydrogen cooler 14 for cooling, and then enters hydrogen refueling machine 15 to achieve rapid hydrogen refueling function.

[0035] The heat source generated by the hydrogen fuel cell 8 during operation can exchange heat with the heat exchanger 7 to cool the hydrogen fuel cell 8. The heat exchanger 7 makes full use of the heat source of the hydrogen fuel cell 8 to vaporize hydrogen flash vapor and liquid hydrogen. The cold source generated by the heat exchanger 7 can also be provided to the hydrogen cooler 14. The heat exchange between the components can save a lot of energy.

[0036] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0037] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A heat exchange hydrogen charging system for a liquid hydrogen skid-mounted hydrogen station, characterized by: The system includes a liquid hydrogen storage tank, with liquid hydrogen at the bottom and hydrogen flash vapor at the top. The bottom of the liquid hydrogen storage tank is connected to the inlet of a self-pressurizing device via a self-pressurizing pipeline. The outlet of the self-pressurizing device is then connected to the top of the liquid hydrogen storage tank via a gas pipeline. The top of the liquid hydrogen storage tank is then connected to the inlet of a vaporizer via one pipeline. The outlet of the vaporizer is connected to a first hydrogen storage cylinder group via a pipeline, and the other pipeline is connected to the inlet of a heat exchanger. The outlet of the heat exchanger is connected to the first hydrogen storage cylinder group. The first hydrogen storage cylinder group is then connected to a hydrogen fuel cell via a pipeline. The hydrogen fuel cell is connected to a charging pile. The bottom of the liquid hydrogen storage tank is connected to the inlet of the pressurization chamber of the plunger pump via an inlet pipe. The exhaust port at the top of the pressurization chamber of the plunger pump is connected to the liquid hydrogen storage tank via a return gas pipe. The return gas pipe inside the liquid hydrogen storage tank extends to the top. The outlet of the plunger pump is connected to the inlet of the heat exchanger via a pipe. The outlet of the heat exchanger is connected to the second hydrogen storage cylinder group via a pipe. The second hydrogen storage cylinder group is connected to the hydrogen cooler via a pipe. The hydrogen cooler is then connected to the hydrogen refueling machine via a pipe. The heat exchanger is connected to the heat source generated by the hydrogen fuel cell for heat exchange, and the hydrogen cooler is connected to the heat exchanger for heat exchange.

2. The heat exchange hydrogen charging system for a liquid hydrogen pump-probe hydrogen station according to claim 1, characterized in that: A one-way valve is installed on the pipeline connected to the top rear side of the liquid hydrogen storage tank.

3. The heat exchange hydrogen refueling and charging system for a liquid hydrogen skid-mounted hydrogen refueling station according to claim 1, characterized in that: The self-pressurizer is an air bath vaporizer.

4. The heat exchange hydrogen charging system for a liquid hydrogen pump loading hydrogen station according to claim 1, characterized by: The second hydrogen storage cylinder assembly is connected to the hydrogen fuel cell via a pipeline and a pressure reducing valve.

5. The heat exchange hydrogen charging system for a liquid hydrogen pump-probe hydrogen station according to claim 1, characterized in that: The heat source generated by the hydrogen fuel cell is connected to the heating components.

6. The heat exchange hydrogen charging system for a liquid hydrogen pump loading hydrogen station according to claim 1, wherein: The hydrogen fuel cell is also connected to a lithium battery.

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