Cooling, heating, charging and hydrogenation method for liquid hydrogen storage skid-mounted station

Abstract

The invention relates to the technical field of liquid hydrogen storage, in particular to a cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station. Comprising a liquid hydrogen storage tank, a branch of a liquid outlet of a liquid hydrogen booster pump is connected with a gas inlet of a vaporizer through a pipeline, a gas outlet of the vaporizer is connected with a high-pressure buffer tank, and the high-pressure buffer tank is connected with a hydrogen hydrogenation machine through a pipeline; the other branch at the bottom of the liquid hydrogen storage tank is connected with an inlet of the heat exchange and cold supply assembly through a pipeline, an outlet of the heat exchange and cold supply assembly is connected with a gas inlet of the hydrogen booster pump through a pipeline, the gas inlet of the hydrogen booster pump is connected with the top of the liquid hydrogen storage tank through a pipeline, and the buffer tank is connected with the hydrogen fuel cell through a pipeline. The hydrogen fuel cell is connected with the charging pile, and a heat source generated by the hydrogen fuel cell is connected with the heating assembly. Various functions of cooling, heating, charging, hydrogenation and the like are integrated, energy and space of the hydrogenation skid-mounted station are fully utilized, and hydrogen flash steam at the top of the liquid hydrogen storage tank is also fully utilized.

Description

Technical field:

[0001] The present invention relates to the technical field of liquid hydrogen storage, and in particular to a cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station. Background technology:

[0002] At present, in the hydrogenation skid-mounted station, the gas source of the hydrogenation machine comes from the liquid hydrogen storage tank. The specific conversion process is that the liquid hydrogen in the liquid hydrogen storage tank first enters the liquid hydrogen bottle, the liquid hydrogen is pressurized by the liquid hydrogen booster pump, and then enters the vaporizer for gasification, and finally enters the hydrogenation machine to hydrogenate the vehicle. The current hydrogenation skid-mounted station generally only has the hydrogenation function, which is relatively simple. Since the market share of hydrogen energy vehicles is relatively small, while the market share of electric vehicles is already very large, the charging facilities are now seriously insufficient. If hydrogen can be used to generate electricity in the hydrogenation skid-mounted station and the electric vehicle can be charged through the charging pile, it will play a good supplementary role in the charging facilities, and can make full use of the energy and space advantages of the hydrogenation skid-mounted station. In addition, due to the actual hydrogen storage process of the liquid hydrogen storage tank, part of the liquid hydrogen will be gasified, and hydrogen flash gas will be generated on 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. There is currently no good solution to the above problems.

[0003] In summary, how to fully utilize the energy and space of hydrogen refueling skid-mounted stations has become a technical problem that urgently needs to be solved in the industry. Summary of the invention:

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a cooling, heating, charging and hydrogenation method for a liquid hydrogen storage skid-mounted station, which solves the problem that the previous hydrogenation skid-mounted stations have single functions and energy and space are not fully utilized.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A method for cooling, heating, charging and hydrogenation of a liquid hydrogen storage skid-mounted station, comprising a liquid hydrogen storage tank, wherein the bottom of the liquid hydrogen storage tank contains liquid hydrogen and the top contains hydrogen flash gas. After the liquid hydrogen at the bottom of the liquid hydrogen storage tank enters the liquid hydrogen bottle, a liquid hydrogen booster pump works to boost the liquid hydrogen, a branch line pumps the liquid hydrogen into a vaporizer for gasification to form high-pressure hydrogen that enters a high-pressure buffer tank for storage, and the high-pressure hydrogen in the high-pressure buffer tank enters a hydrogen hydrogenation machine, and another branch line directly pumps the liquid hydrogen into the liquid hydrogenation machine, thereby realizing the hydrogen and liquid hydrogenation functions for vehicles;

[0007] The hydrogen flash gas on the top of the liquid hydrogen storage tank enters the buffer tank for storage under the action of the hydrogen booster pump. At the same time, the liquid hydrogen at the bottom of the liquid hydrogen storage tank enters the heat exchange and cooling component for gasification under the action of the hydrogen booster pump. The gasified hydrogen also enters the buffer tank for storage under the action of the hydrogen booster pump. The heat exchange and cooling component provides a cold source for places in need. The hydrogen in the buffer tank is finally supplied to the hydrogen fuel cell. The electricity generated by the hydrogen fuel cell when working is supplied to the charging pile to realize the charging function of the electric vehicle. The heat source generated by the hydrogen fuel cell when working is supplied to the heating component, and the heating component provides a heat source for places in need.

[0008] A branch at the bottom of the liquid hydrogen storage tank is connected to the liquid hydrogen bottle through a pipeline, a liquid hydrogen booster pump is installed in the liquid hydrogen bottle, a branch of the liquid outlet of the liquid hydrogen booster pump is connected to the air inlet of the vaporizer through a pipeline, the air outlet of the vaporizer is connected to the high-pressure buffer tank, the high-pressure buffer tank is connected to the hydrogen hydrogenator through a pipeline, and another branch of the liquid outlet of the liquid hydrogen booster pump is connected to the liquid hydrogen hydrogenator through a pipeline.

[0009] Another branch at the bottom of the liquid hydrogen storage tank is connected to the inlet of the heat exchange and cooling component through a pipeline, the outlet of the heat exchange and cooling component is connected to the air inlet of the hydrogen booster pump through a pipeline, the air inlet of the hydrogen booster pump is also connected to the top of the liquid hydrogen storage tank through a pipeline, the air outlet of the hydrogen booster pump is connected to the buffer tank through a pipeline, the buffer tank is then connected to the hydrogen fuel cell through a pipeline, the hydrogen fuel cell is connected to the charging pile, and the heat source generated by the hydrogen fuel cell is connected to the heating component.

[0010] The vaporizer is connected to a heat source generated by a hydrogen fuel cell for heat exchange.

[0011] A hydrogen cooler is provided on the pipeline between the high-pressure buffer tank and the hydrogen hydrogenator, and the hydrogen cooler is connected to the vaporizer for heat exchange.

[0012] The high-pressure buffer tank is connected to the hydrogen fuel cell through a pipeline via a pressure reducing valve.

[0013] The heat exchange and cooling assembly comprises an air bath evaporator and a water bath evaporator connected to each other.

[0014] A pressure reducing valve is arranged on the pipeline between the buffer tank and the hydrogen fuel cell.

[0015] The hydrogen fuel cell is also connected to a lithium battery.

[0016] The present invention adopts the above scheme and has the following advantages:

[0017] The present invention uses a liquid hydrogen bottle and a liquid hydrogen booster pump to pump liquid hydrogen into a vaporizer for gasification and then supplies it to a high-pressure buffer tank and a hydrogenator. The other branch directly pumps liquid hydrogen into the liquid hydrogen hydrogenator to achieve normal hydrogen and liquid hydrogen hydrogenation functions. On the other hand, the hydrogen flash vapor at the top of the liquid hydrogen storage tank is pressurized by the hydrogen booster pump and then supplied to the buffer tank and the hydrogen fuel cell. At the same time, the hydrogen booster pump also supplies the liquid hydrogen at the bottom of the liquid hydrogen storage tank to the buffer tank and the hydrogen fuel cell after gasification through a heat exchange and cooling component. The heat exchange and cooling component can provide a cold source for places in need, and the hydrogen fuel cell can charge the charging pile, thereby realizing the charging function of the electric vehicle. The heat source generated by the hydrogen fuel cell can be supplied to the heating component, and the heating component can provide a heat source for places in need. In this way, the hydrogenation skid-mounted station of the present invention integrates multiple functions such as cooling, heating, charging and hydrogenation, fully utilizes the energy and space of the hydrogenation skid-mounted station, and also fully utilizes the hydrogen flash vapor at the top of the liquid hydrogen storage tank. Description of the drawings:

[0018] Figure 1 It is a schematic diagram of the structural principle of the present invention.

[0019] In the figure, 1. liquid hydrogen storage tank, 2. liquid hydrogen bottle, 3. liquid hydrogen booster pump, 4. vaporizer, 5. high-pressure buffer tank, 6. hydrogen refueling machine, 7. heat exchange and cooling component, 8. hydrogen booster pump, 9. buffer tank, 10. hydrogen fuel cell, 11. charging pile, 12. heating component, 13. liquid hydrogen refueling machine, 14. lithium battery, 15. hydrogen cooler, 16. pressure reducing valve. Specific implementation method:

[0020] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, a cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station includes a liquid hydrogen storage tank 1, wherein the bottom of the liquid hydrogen storage tank 1 contains liquid hydrogen and the top is hydrogen flash gas. After the liquid hydrogen at the bottom of the liquid hydrogen storage tank 1 enters the liquid hydrogen bottle 2, the liquid hydrogen booster pump 3 works to boost the liquid hydrogen, and a branch line pumps the liquid hydrogen into the vaporizer 4 for gasification to form high-pressure hydrogen that enters the high-pressure buffer tank 5 for storage. The high-pressure hydrogen in the high-pressure buffer tank 5 then enters the hydrogen refueling machine 6, and another branch line directly pumps the liquid hydrogen into the liquid hydrogen refueling machine 13, thereby realizing the hydrogen and liquid hydrogen refueling functions for the vehicle;

[0022] The hydrogen flash gas at the top of the liquid hydrogen storage tank 1 enters the buffer tank 9 for storage under the action of the hydrogen booster pump 8. At the same time, the liquid hydrogen at the bottom of the liquid hydrogen storage tank 1 enters the heat exchange and cooling component 7 for gasification under the action of the hydrogen booster pump 8. The gasified hydrogen also enters the buffer tank 9 for storage under the action of the hydrogen booster pump 8. The heat exchange and cooling component 7 provides a cold source for the place in need. The hydrogen in the buffer tank 9 is finally supplied to the hydrogen fuel cell 10. The electric energy generated by the hydrogen fuel cell 10 when working is supplied to the charging pile 11 to realize the charging function of the electric vehicle. The heat source generated by the hydrogen fuel cell 10 when working is supplied to the heating component 12, and the heating component 12 provides a heat source for the place in need.

[0023] A branch at the bottom of the liquid hydrogen storage tank 1 is connected to the liquid hydrogen bottle 2 through a pipeline, a liquid hydrogen booster pump 3 is installed in the liquid hydrogen bottle 2, a branch of the liquid outlet of the liquid hydrogen booster pump 3 is connected to the air inlet of the vaporizer 4 through a pipeline, the air outlet of the vaporizer 4 is connected to the high-pressure buffer tank 5, the high-pressure buffer tank 5 is connected to the hydrogen hydrogenator 6 through a pipeline, and another branch of the liquid outlet of the liquid hydrogen booster pump 3 is connected to the liquid hydrogen hydrogenator 13 through a pipeline.

[0024] Another branch at the bottom of the liquid hydrogen storage tank 1 is connected to the inlet of the heat exchange and cooling component 7 through a pipeline, and the outlet of the heat exchange and cooling component 7 is connected to the air inlet of the hydrogen booster pump 8 through a pipeline. The air inlet of the hydrogen booster pump 8 is also connected to the top of the liquid hydrogen storage tank 1 through a pipeline, and the air outlet of the hydrogen booster pump 8 is connected to the buffer tank 9 through a pipeline. The buffer tank 9 is then connected to the hydrogen fuel cell 10 through a pipeline, and the hydrogen fuel cell 10 is connected to the charging pile 11. The heat source generated by the hydrogen fuel cell 10 is connected to the heating component 12.

[0025] The vaporizer 4 is connected to the heat source generated by the hydrogen fuel cell 10 for heat exchange, so as to fully utilize the heat source generated by the hydrogen fuel cell 10 .

[0026] A hydrogen cooler 15 is provided on the pipeline between the high-pressure buffer tank 5 and the hydrogen hydrogenator 6. The hydrogen cooler 15 can cool the hydrogen discharged from the high-pressure buffer tank 5, thereby controlling the temperature of the hydrogen entering the hydrogen hydrogenator 6. The hydrogen cooler 15 is connected to the vaporizer 4 for heat exchange, thereby making full use of the cold source generated by the vaporizer 4.

[0027] The high-pressure buffer tank 5 is connected to the hydrogen fuel cell 10 through a pipeline via a pressure reducing valve 16 . The high-pressure hydrogen in the high-pressure buffer tank 5 can also be supplied to the hydrogen fuel cell 10 for use after being reduced in pressure by the pressure reducing valve 16 .

[0028] The heat exchange and cooling component 7 includes an air bath vaporizer and a water bath vaporizer connected to each other, which can vaporize liquid hydrogen and provide a cold source for places in need.

[0029] A pressure reducing valve 16 is provided on the pipeline between the buffer tank 9 and the hydrogen fuel cell 10 to reduce the pressure of hydrogen entering the hydrogen fuel cell 10 .

[0030] The hydrogen fuel cell 10 is also connected to a lithium battery 14 , and the lithium battery 14 can be charged. The lithium battery 14 can also provide electrical energy for the operation of the hydrogen fuel cell 10 .

[0031] Working principle:

[0032] After the liquid hydrogen at the bottom of the liquid hydrogen storage tank 1 enters the liquid hydrogen bottle 2, the liquid hydrogen booster pump 3 works to boost the pressure of the liquid hydrogen, and one branch pumps the liquid hydrogen into the vaporizer 4 for gasification to form high-pressure hydrogen that enters the high-pressure buffer tank 5 for storage. The high-pressure hydrogen in the high-pressure buffer tank 5 first enters the hydrogen cooler 15 for cooling, and then enters the hydrogen hydrogenator 6. Another branch directly pumps the liquid hydrogen into the liquid hydrogen hydrogenator 13, thereby realizing the hydrogen and liquid hydrogen hydrogenation function for the vehicle; the hydrogen flash gas at the top of the liquid hydrogen storage tank 1 enters the buffer tank 9 for storage under the action of the hydrogen booster pump 8. At the same time, under the action of the hydrogen booster pump 8, the liquid hydrogen at the bottom of the liquid hydrogen storage tank 1 enters the heat exchange and cooling component 7 for gasification, and the gasified hydrogen It also enters the buffer tank 9 for storage under the action of the hydrogen booster pump 8. During this period, the heat exchange cooling component 7 can provide a cold source for the required places. The hydrogen in the buffer tank 9 is finally supplied to the hydrogen fuel cell 10. The electric energy generated by the hydrogen fuel cell 10 when working can be supplied to the charging pile 11 to realize the charging function of the electric vehicle. The heat source generated by the hydrogen fuel cell 10 when working can be supplied to the heating component 12 and the vaporizer 4. The heating component 12 can provide a heat source for the required places. The vaporizer 4 makes full use of the heat source of the hydrogen fuel cell 10 to gasify the liquid hydrogen. The cold source generated by the vaporizer 4 can also be provided to the hydrogen cooler 15 to cool the hydrogen entering the hydrogen hydrogenator 6, saving energy. In addition, the device of the present invention can use its own hydrogen energy to generate electricity, and can be disconnected from the power grid for off-grid hydrogenation and charging, reducing dependence on the power grid.

[0033] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0034] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A method for cooling, heating, charging and hydrogenation of a liquid hydrogen storage skid-mounted station, characterized in that: It includes a liquid hydrogen storage tank, wherein the bottom of the liquid hydrogen storage tank contains liquid hydrogen, and the top is hydrogen flash gas. After the liquid hydrogen at the bottom of the liquid hydrogen storage tank enters the liquid hydrogen bottle, the liquid hydrogen booster pump works to boost the liquid hydrogen, and one branch pumps the liquid hydrogen into the vaporizer for gasification to form high-pressure hydrogen that enters the high-pressure buffer tank for storage. The high-pressure hydrogen in the high-pressure buffer tank then enters the hydrogen hydrogenator, and another branch directly pumps the liquid hydrogen into the liquid hydrogen hydrogenator, thereby realizing the hydrogen and liquid hydrogen hydrogenation functions for the vehicle; The hydrogen flash gas on the top of the liquid hydrogen storage tank enters the buffer tank for storage under the action of the hydrogen booster pump. At the same time, the liquid hydrogen at the bottom of the liquid hydrogen storage tank enters the heat exchange and cooling component for gasification under the action of the hydrogen booster pump. The gasified hydrogen also enters the buffer tank for storage under the action of the hydrogen booster pump. The heat exchange and cooling component provides a cold source for places in need. The hydrogen in the buffer tank is finally supplied to the hydrogen fuel cell. The electricity generated by the hydrogen fuel cell when working is supplied to the charging pile to realize the charging function of the electric vehicle. The heat source generated by the hydrogen fuel cell when working is supplied to the heating component, and the heating component provides a heat source for places in need.

2. The cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station according to claim 1, characterized in that: A branch at the bottom of the liquid hydrogen storage tank is connected to the liquid hydrogen bottle through a pipeline, a liquid hydrogen booster pump is installed in the liquid hydrogen bottle, a branch of the liquid outlet of the liquid hydrogen booster pump is connected to the air inlet of the vaporizer through a pipeline, the air outlet of the vaporizer is connected to the high-pressure buffer tank, the high-pressure buffer tank is connected to the hydrogen hydrogenator through a pipeline, and another branch of the liquid outlet of the liquid hydrogen booster pump is connected to the liquid hydrogen hydrogenator through a pipeline.

3. The cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station according to claim 1, characterized in that: Another branch at the bottom of the liquid hydrogen storage tank is connected to the inlet of the heat exchange and cooling component through a pipeline, the outlet of the heat exchange and cooling component is connected to the air inlet of the hydrogen booster pump through a pipeline, the air inlet of the hydrogen booster pump is also connected to the top of the liquid hydrogen storage tank through a pipeline, the air outlet of the hydrogen booster pump is connected to the buffer tank through a pipeline, the buffer tank is then connected to the hydrogen fuel cell through a pipeline, the hydrogen fuel cell is connected to the charging pile, and the heat source generated by the hydrogen fuel cell is connected to the heating component.

4. The cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station according to claim 2, characterized in that: The vaporizer is connected to a heat source generated by a hydrogen fuel cell for heat exchange.

5. The cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station according to claim 2, characterized in that: A hydrogen cooler is provided on the pipeline between the high-pressure buffer tank and the hydrogen hydrogenator, and the hydrogen cooler is connected to the vaporizer for heat exchange.

6. The cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station according to claim 2, characterized in that: The high-pressure buffer tank is connected to the hydrogen fuel cell through a pipeline via a pressure reducing valve.

7. The cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station according to claim 3, characterized in that: The heat exchange and cooling assembly comprises an air bath evaporator and a water bath evaporator connected to each other.

8. The cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station according to claim 3, characterized in that: A pressure reducing valve is arranged on the pipeline between the buffer tank and the hydrogen fuel cell.

9. The cooling, heating, charging and hydrogenation method of a liquid hydrogen storage skid-mounted station according to claim 3, characterized in that: The hydrogen fuel cell is also connected to a lithium battery.

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