CN115727260A - Liquid hydrogen pressure boost hydrogen supply system - Google Patents
Liquid hydrogen pressure boost hydrogen supply system Download PDFInfo
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- CN115727260A CN115727260A CN202211421549.9A CN202211421549A CN115727260A CN 115727260 A CN115727260 A CN 115727260A CN 202211421549 A CN202211421549 A CN 202211421549A CN 115727260 A CN115727260 A CN 115727260A
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Abstract
The invention discloses a liquid hydrogen pressurizing hydrogen supply system, which comprises: the liquid hydrogen source is connected with the inlet of the double-acting liquid hydrogen booster pump through a liquid hydrogen input pipeline, and a first automatic cut-off valve is arranged on the liquid hydrogen input pipeline; a liquid phase outlet of the double-acting liquid hydrogen booster pump is connected with an inlet of a liquid hydrogen output pipeline through an intermediate conveying pipeline, a second automatic cut-off valve is arranged on the liquid hydrogen output pipeline, an inlet of a backflow pre-cooling pipeline is simultaneously connected with the intermediate conveying pipeline and the liquid hydrogen output pipeline, and an outlet of the backflow pre-cooling pipeline is communicated with an inlet of the double-acting liquid hydrogen booster pump; the gas phase outlet of the double-acting liquid hydrogen booster pump is connected with the inlet of a first gas hydrogen output pipeline of the third automatic cut-off valve, the outlet of the first gas hydrogen output pipeline is connected with the inlet of a tube side of a first sleeve heat exchanger, the outlet of the tube side of the first sleeve heat exchanger is connected with the inlet of a tube side of a second gas hydrogen output pipeline, the outlet of the second gas hydrogen output pipeline is connected with the inlet of the third gas hydrogen output pipeline, and the fourth automatic cut-off valve is arranged on the second gas hydrogen output pipeline. The invention has the advantage of good energy-saving effect.
Description
Technical Field
The invention relates to the technical field of liquid hydrogen and gas hydrogen supply, in particular to a liquid hydrogen pressurizing hydrogen supply system.
Background
In a liquid hydrogen pressurizing and hydrogen supplying system, liquid hydrogen in a liquid hydrogen source is generally pressurized by a liquid hydrogen pressurizing pump and then supplied to a liquid using terminal through a liquid hydrogen conveying pipeline. Before the liquid hydrogen pressurizing and hydrogen supplying system pressurizes and supplies hydrogen, the whole system (including a liquid hydrogen conveying pipeline and a liquid hydrogen booster pump) needs to be pre-cooled and cooled by liquid hydrogen, and after pre-cooling is finished, the liquid hydrogen is pressurized and supplied to a liquid using terminal by the liquid hydrogen booster pump. The liquid hydrogen pressurization hydrogen supply system used at present has the following defects: (1) Liquid hydrogen can generate a large amount of gas hydrogen in both precooling and pressurizing processes, and the general treatment mode of the gas hydrogen is as follows: the gas hydrogen is returned to the liquid hydrogen source or directly discharged through the diffusing pipe, and heat is brought when the gas hydrogen is returned to the liquid hydrogen source, so that the liquid hydrogen is not favorably stored, and the risk of overpressure of the storage tank is easily caused; the direct diffusion of hydrogen gas causes energy waste; (2) The transmission unit of the liquid hydrogen booster pump can generate a large amount of heat energy during working, and the heat energy is directly diffused to the atmosphere at present, so that energy waste is caused.
Disclosure of Invention
The invention aims to provide a liquid hydrogen pressurizing hydrogen supply system which is energy-saving and high in use stability.
In order to realize the purpose, the invention adopts the following technical scheme: a liquid hydrogen pressurizing hydrogen supply system comprises a liquid hydrogen source, a double-acting liquid hydrogen pressurizing pump, a backflow precooling pipeline, a liquid hydrogen input pipeline and a liquid hydrogen output pipeline;
the liquid hydrogen source is connected with an inlet of the double-acting liquid hydrogen booster pump through a liquid hydrogen input pipeline, and a first automatic cut-off valve, a first one-way valve, a first flow sensor and a first temperature sensor are arranged on the liquid hydrogen input pipeline;
a liquid phase outlet of the double-acting liquid hydrogen booster pump is connected with an inlet of an intermediate conveying pipeline, an outlet of the intermediate conveying pipeline is connected with an inlet of a liquid hydrogen output pipeline, an outlet of the liquid hydrogen output pipeline is used for being connected with a liquid using terminal, a second automatic cut-off valve is arranged on the liquid hydrogen output pipeline, a second temperature sensor is arranged on the liquid hydrogen output pipeline in front of the second automatic cut-off valve, and a third temperature sensor and a second flow sensor are arranged on the liquid hydrogen output pipeline behind the second automatic cut-off valve;
the inlet of the backflow precooling pipeline is communicated with the outlet of the intermediate conveying pipeline and the inlet of the liquid hydrogen output pipeline at the same time, the outlet of the backflow precooling pipeline is communicated with the inlet of the double-acting liquid hydrogen booster pump, and the backflow precooling pipeline is provided with a second one-way valve and a first automatic regulating valve;
the gas phase outlet of the double-acting liquid hydrogen booster pump is connected with the inlet of a first gas hydrogen output pipeline, a third automatic stop valve is arranged on the first gas hydrogen output pipeline, the outlet of the first gas hydrogen output pipeline is connected with the tube side inlet of a first sleeve heat exchanger, the tube side outlet of the first sleeve heat exchanger is connected with the inlet of a second gas hydrogen output pipeline, the outlet of the second gas hydrogen output pipeline is connected with the inlet of a third gas hydrogen output pipeline, the outlet of the third gas hydrogen output pipeline is used for being connected with a gas using terminal, a fourth automatic stop valve is arranged on the second gas hydrogen output pipeline, and a fourth temperature sensor is arranged on the third gas hydrogen output pipeline;
the double-acting liquid hydrogen booster pump is characterized in that a first heat transfer and heat preservation pipeline is wrapped outside a transmission unit of the double-acting liquid hydrogen booster pump, one end of the first heat transfer and heat preservation pipeline is connected with a tube pass inlet of a second sleeve heat exchanger, the other end of the first heat transfer and heat preservation pipeline is connected with a tube pass outlet of the second sleeve heat exchanger through a first conveying pump, the first heat transfer and heat preservation pipeline, the tube pass of the second sleeve heat exchanger and the first conveying pump form a closed first heat exchange loop, and a heat exchange medium flows through the first heat exchange loop; the shell pass outlet of the second sleeve heat exchanger is connected with the shell pass inlet of the first sleeve heat exchanger through a second conveying pump, the shell pass outlet of the first sleeve heat exchanger is connected with the shell pass inlet of the second sleeve heat exchanger, the shell pass of the first sleeve heat exchanger, the shell pass of the second sleeve heat exchanger and the second conveying pump form a closed second heat exchange loop, and heat exchange media flow through the second heat exchange loop.
Further, the aforementioned liquid hydrogen pressurization hydrogen supply system, wherein: an inlet of the fourth gas-hydrogen output pipeline is connected with a tube side outlet of the first sleeve heat exchanger, an outlet of the fourth gas-hydrogen output pipeline is connected with an inlet of the third gas-hydrogen output pipeline, and a fifth automatic shut-off valve, an air-temperature heat exchanger and a sixth automatic shut-off valve are sequentially arranged on the fourth gas-hydrogen output pipeline along the gas-hydrogen conveying direction.
Further, the aforementioned liquid hydrogen pressurization hydrogen supply system, wherein: a first pressure sensor is arranged on the liquid hydrogen input pipeline.
Further, the aforementioned liquid hydrogen pressurization hydrogen supply system, wherein: and a second pressure sensor is arranged on a liquid hydrogen output pipeline in front of the second automatic cut-off valve.
Further, the aforementioned liquid hydrogen pressurization hydrogen supply system, wherein: and a third pressure sensor is arranged on a liquid hydrogen output pipeline behind the second automatic cut-off valve.
Through the implementation of the technical scheme, the invention has the beneficial effects that: (1) The gas hydrogen generated in the precooling and pressurizing processes of the liquid hydrogen can be effectively recycled, the gas hydrogen is pressurized and heated and then supplied to the gas using terminal, and the gas hydrogen is not returned to the liquid hydrogen source or directly discharged, so that the energy waste is reduced, the overpressure of the storage tank is prevented, and the integral use stability and use safety of the system are improved; (2) The system can effectively recycle a large amount of heat energy generated by the transmission unit of the liquid hydrogen booster pump during working, and the part of heat energy is used for heating the gas hydrogen generated by the liquid hydrogen during precooling and boosting, so that the temperature of the gas hydrogen can more quickly meet the use requirement of a gas terminal, the energy waste is further reduced, and the energy-saving effect is good; (3) In the pressurization process, the liquid hydrogen flow can be adjusted in real time, the liquid hydrogen flow supplied to the liquid using terminal is prevented from exceeding a preset safety value, and the use stability and the use safety of the system are improved.
Drawings
Fig. 1 is a schematic structural diagram of a liquid hydrogen pressurizing hydrogen supply system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the liquid hydrogen pressurizing hydrogen supply system comprises a liquid hydrogen source 1, a double-acting liquid hydrogen pressurizing pump 2, a backflow precooling pipeline 3, a liquid hydrogen input pipeline 4 and a liquid hydrogen output pipeline 5;
the liquid hydrogen source 1 is connected with the inlet of the double-acting liquid hydrogen booster pump 2 through a liquid hydrogen input pipeline 4, a first automatic cut-off valve 6, a first one-way valve 7, a first flow sensor 8, a first pressure sensor 9 and a first temperature sensor 10 are arranged on the liquid hydrogen input pipeline 4, and the first one-way valve 7 only allows liquid hydrogen in the liquid hydrogen input pipeline 4 to flow from the liquid hydrogen source 1 to the double-acting liquid hydrogen booster pump 2;
a liquid phase outlet of the double-acting liquid hydrogen booster pump 2 is connected with an inlet of an intermediate conveying pipeline 11, an outlet of the intermediate conveying pipeline 11 is connected with an inlet of a liquid hydrogen output pipeline 5, an outlet of the liquid hydrogen output pipeline 5 is used for being connected with a liquid using terminal 12, a second automatic cut-off valve 13 is arranged on the liquid hydrogen output pipeline 5, a second pressure sensor 14 and a second temperature sensor 15 are arranged on the liquid hydrogen output pipeline 5 in front of the second automatic cut-off valve 13, and a third pressure sensor 16, a third temperature sensor 17 and a second flow sensor 18 are arranged on the liquid hydrogen output pipeline 5 behind the second automatic cut-off valve 13;
an inlet of the backflow precooling pipeline 3 is communicated with an outlet of the intermediate conveying pipeline 11 and an inlet of the liquid hydrogen output pipeline 5 at the same time, an outlet of the backflow precooling pipeline 5 is communicated with an inlet of the double-acting liquid hydrogen booster pump 2, a second one-way valve 19 and a first automatic regulating valve 20 are arranged on the backflow precooling pipeline 3, and the second one-way valve only allows liquid hydrogen in the backflow precooling pipeline 3 to flow from the inlet of the backflow precooling pipeline 3 to the outlet of the backflow precooling pipeline 3;
the gas phase outlet of the double-acting liquid hydrogen booster pump 2 is connected with the inlet of a first gas hydrogen output pipeline 21, a third automatic cut-off valve 22 is arranged on the first gas hydrogen output pipeline 21, the outlet of the first gas hydrogen output pipeline 21 is connected with the tube side inlet of a first sleeve heat exchanger 23, the tube side outlet of the first sleeve heat exchanger 23 is connected with the inlet of a second gas hydrogen output pipeline 24, the outlet of the second gas hydrogen output pipeline 24 is connected with the inlet of a third gas hydrogen output pipeline 25, the outlet of the third gas hydrogen output pipeline 25 is used for being connected with a gas using terminal 26, a fourth automatic cut-off valve 27 is arranged on the second gas hydrogen output pipeline 24, and a fourth temperature sensor 28 is arranged on the third gas hydrogen output pipeline 25;
a first heat transfer and heat preservation pipeline 29 is coated outside a transmission unit 201 of the double-acting liquid hydrogen booster pump 2, one end of the first heat transfer and heat preservation pipeline 29 is connected with a tube pass inlet of the second sleeve heat exchanger 30, the other end of the first heat transfer and heat preservation pipeline 29 is connected with a tube pass outlet of the second sleeve heat exchanger 30 through a first conveying pump 31, the first heat transfer and heat preservation pipeline 29, the tube pass of the second sleeve heat exchanger and the first conveying pump 31 form a closed first heat exchange loop, and a heat exchange medium flows through the first heat exchange loop; the shell pass outlet of the second casing heat exchanger 30 is connected with the shell pass inlet of the first casing heat exchanger 23 through a second delivery pump 32, the shell pass outlet of the first casing heat exchanger 23 is connected with the shell pass inlet of the second casing heat exchanger 30, the shell pass of the first casing heat exchanger, the shell pass of the second casing heat exchanger and the second delivery pump 32 form a closed second heat exchange loop, and a heat exchange medium flows through the second heat exchange loop.
In this embodiment, an inlet of the fourth hydrogen output pipeline 33 is connected to an outlet of the tube side of the first sleeve heat exchanger 23, an outlet of the fourth hydrogen output pipeline 33 is connected to an inlet of the third hydrogen output pipeline 25, and the fifth automatic cut-off valve 34, the air-temperature heat exchanger 35 and the sixth automatic cut-off valve 36 are sequentially arranged on the fourth hydrogen output pipeline 33 along the hydrogen conveying direction, so that the temperature of the hydrogen can be better regulated, the use is more convenient, and the use stability and the use safety of the whole system are further improved;
in the practical application, each valve and each sensor are controlled by a control center;
the working process of the system mainly comprises a precooling process, a pressurizing process, a liquid hydrogen pressurizing flow adjusting process and a heat utilization process of the double-acting liquid hydrogen pressurizing pump, and the working principle of each process is explained one by one as follows:
the operation principle of the precooling process is as follows:
the first automatic shutoff valve 6, the first automatic regulating valve 20, the third automatic shutoff valve 22, and the fourth automatic shutoff valve 27 are opened, and the second automatic shutoff valve 13, the fifth automatic shutoff valve 34, and the sixth automatic shutoff valve 36 are closed; then starting the double-acting liquid hydrogen booster pump 2, wherein liquid hydrogen in the liquid hydrogen source 1 firstly enters the double-acting liquid hydrogen booster pump 2 along the liquid hydrogen input pipeline 4, a small part of liquid hydrogen is continuously vaporized into low-temperature gas hydrogen in the process that the liquid hydrogen flows along the liquid hydrogen input pipeline 4, and after the liquid hydrogen and the low-temperature gas hydrogen enter the double-acting liquid hydrogen booster pump 2, the double-acting liquid hydrogen booster pump 2 boosts the liquid hydrogen and then outputs the liquid hydrogen from a liquid phase outlet of the double-acting liquid hydrogen booster pump, and simultaneously boosts the low-temperature gas hydrogen and then outputs the low-temperature gas hydrogen from a gas phase outlet of the double-acting liquid hydrogen booster pump; liquid hydrogen output from a liquid phase outlet of the double-acting liquid hydrogen booster pump 2 enters the backflow precooling pipeline 3 through the intermediate conveying pipeline 11 and then enters the double-acting liquid hydrogen booster pump 2 through the backflow precooling pipeline 3, so that the liquid hydrogen input pipeline 4, the liquid hydrogen output pipeline 5 and the double-acting liquid hydrogen booster pump 2 are precooled through direct or indirect cold energy transfer; liquid hydrogen can be continuously evaporated in the precooling process to generate new low-temperature gas hydrogen, the generated low-temperature gas hydrogen enters the double-acting liquid hydrogen booster pump 2 along with the liquid hydrogen, the double-acting liquid hydrogen booster pump 2 boosts the gas hydrogen and outputs the gas hydrogen to the first gas hydrogen output pipeline 21 from a gas phase outlet of the double-acting liquid hydrogen booster pump, the gas hydrogen is heated by the first sleeve heat exchanger 23 and then input into the second gas hydrogen output pipeline 24, and the gas hydrogen is conveyed to the gas terminal 26 through the third gas hydrogen output pipeline 25; in the precooling process, the control center can acquire the temperatures fed back by the first temperature sensor 10, the second temperature sensor 15, the third temperature sensor 17 and the fourth temperature sensor 28 in real time, when the control center judges that the gas hydrogen temperature does not meet the use requirement of the gas terminal 26 at the moment through the temperature fed back by the fourth temperature sensor 28, the fifth automatic cut-off valve 34 and the sixth automatic cut-off valve 36 are opened, the fourth automatic cut-off valve 27 is closed, at the moment, the gas hydrogen heated by the first sleeve heat exchanger 23 enters the third gas hydrogen output pipeline 25 along the fourth gas hydrogen output pipeline 33, in the process that the gas hydrogen passes through the fourth gas hydrogen output pipeline 33, the air temperature type heat exchanger 35 on the fourth gas hydrogen output pipeline 33 can further heat the gas hydrogen, the gas hydrogen is heated to meet the use requirement of the gas terminal 26 and then is output to the third gas hydrogen output pipeline 25, and the third gas hydrogen output pipeline 25 outputs the gas hydrogen meeting the use requirement of the gas terminal 26 to the gas terminal; when the control center judges that the liquid hydrogen input pipeline 4, the liquid hydrogen output pipeline 5 and the double-acting liquid hydrogen booster pump 2 reach the pre-cooling temperature set value at the moment through the temperatures fed back by the first temperature sensor 10, the second temperature sensor 15 and the third temperature sensor 17, pre-cooling of the liquid hydrogen input pipeline 4, the liquid hydrogen output pipeline 5 and the double-acting liquid hydrogen booster pump 2 is completed;
the working principle of the pressurization process is as follows:
after the pre-cooling process is finished, opening the first automatic shut-off valve 6, the second automatic shut-off valve 13, the third automatic shut-off valve 22 and the fourth automatic shut-off valve 27, and closing the first automatic regulating valve 20, the fifth automatic shut-off valve 34 and the sixth automatic shut-off valve 36; then, the double-acting liquid hydrogen booster pump 2 is started, at the moment, liquid hydrogen in the liquid hydrogen source 1 enters the double-acting liquid hydrogen booster pump 2 along the liquid hydrogen input pipeline 4, a small part of the liquid hydrogen is continuously vaporized into low-temperature gas hydrogen in the process that the liquid hydrogen flows along the liquid hydrogen input pipeline 4, after the liquid hydrogen and the low-temperature gas hydrogen enter the double-acting liquid hydrogen booster pump 2, the double-acting liquid hydrogen booster pump 2 boosts the liquid hydrogen and outputs the liquid hydrogen to the middle conveying pipeline 11 from a liquid phase outlet of the liquid hydrogen, meanwhile, the low-temperature gas hydrogen is boosted and outputs the liquid hydrogen to the first gas hydrogen output pipeline 21 from a gas phase outlet of the low-temperature gas hydrogen, the liquid hydrogen is heated by the first sleeve heat exchanger 23 and then is input into the second gas hydrogen output pipeline 24, and the liquid hydrogen is conveyed to the gas terminal 26 by the third gas hydrogen output pipeline 25; in the pressurization process, the control center can acquire the temperatures fed back by the first temperature sensor 10, the second temperature sensor 15, the third temperature sensor 17 and the fourth temperature sensor 28 in real time, when the control center judges that the gas-hydrogen temperature does not meet the use requirement of the gas terminal 26 through the temperature fed back by the fourth temperature sensor 28, the fifth automatic cut-off valve 34 and the sixth automatic cut-off valve 36 are opened, the fourth automatic cut-off valve 27 is closed, at the moment, the gas-hydrogen heated by the first sleeve heat exchanger 23 enters the third gas-hydrogen output pipeline 25 along the fourth gas-hydrogen output pipeline 33, in the process that the gas-hydrogen passes through the fourth gas-hydrogen output pipeline 33, the air-temperature heat exchanger 35 on the fourth gas-hydrogen output pipeline 33 can further heat the gas-hydrogen, the gas-hydrogen is heated to meet the use requirement of the gas terminal 26 and then is output to the third gas-hydrogen output pipeline 25, and the third gas-hydrogen output pipeline 25 outputs the gas-hydrogen meeting the use requirement of the gas terminal 26 to the gas terminal;
the working principle of the liquid hydrogen pressurizing flow adjusting process is as follows:
in the process of pressurizing the liquid hydrogen, the control center can acquire the flow fed back by the first flow sensor 8 and the second flow sensor 18 in real time, the flow of the liquid hydrogen input pipeline 4 is monitored by the first flow sensor 8, the flow of the liquid hydrogen output pipeline 5 is monitored by the second flow sensor 18, when the control center judges that the flow of the liquid hydrogen output pipeline 5 reaches a flow set value at the moment, the first automatic regulating valve 20 is opened, at the moment, the liquid hydrogen output by the double-acting liquid hydrogen booster pump 2 through pressurization is input into the liquid hydrogen output pipeline 5 through the middle conveying pipeline 11, the other part of the liquid hydrogen flows back to the inlet of the double-acting liquid hydrogen booster pump 2 through the backflow precooling pipeline 3, and the size of the liquid hydrogen backflow amount can be regulated through the first automatic regulating valve 20, so that the regulation of the liquid hydrogen backflow amount is completed;
the working principle of the heat utilization process of the double-acting liquid hydrogen booster pump is as follows:
in the precooling process, the pressurization process and the liquid hydrogen pressurization flow rate adjusting process, the first transfer pump 31 continuously flows the heat exchange medium in the first heat exchange loop through the transmission unit 201 of the double-acting liquid hydrogen booster pump 2, so as to take away the heat energy generated in the working process of the transmission unit 201 of the double-acting liquid hydrogen booster pump 2 and transfer the heat energy to the heat exchange medium in the shell pass of the second sleeve heat exchanger 30, then the second transfer pump 32 continuously flows the heat exchange medium in the shell pass of the second sleeve heat exchanger 30 through the shell pass of the first sleeve heat exchanger 23 along the second heat exchange loop, at this moment, the heat exchange medium entering the shell pass of the first sleeve heat exchanger 23 can transfer the heat energy to the low-temperature gas hydrogen flowing through the tube pass of the first sleeve heat exchanger, so as to utilize the heat energy generated in the working process of the transmission unit 201 of the double-acting liquid hydrogen booster pump 2 to heat the gas hydrogen, reduce the energy waste, and through the secondary heat exchange structure, the transmission unit 201 of the liquid hydrogen booster pump 2 can also be prevented from directly contacting with the low-temperature hydrogen, thereby preventing the safety freezing stability of the double-acting liquid hydrogen booster pump 2 from being further.
The invention has the advantages that: (1) The gas hydrogen generated in the precooling and pressurizing processes of the liquid hydrogen can be effectively recycled, the gas hydrogen is pressurized and heated and then supplied to the gas using terminal, and the gas hydrogen is not returned to the liquid hydrogen source or directly discharged, so that the energy waste is reduced, the overpressure of the storage tank is prevented, and the integral use stability and use safety of the system are improved; (2) The system can effectively recycle a large amount of heat energy generated by the transmission unit of the liquid hydrogen booster pump during working, and the part of heat energy is used for heating the gas hydrogen generated by the liquid hydrogen during precooling and boosting, so that the temperature of the gas hydrogen can more quickly meet the use requirement of a gas terminal, the energy waste is further reduced, and the energy-saving effect is good; (3) In the pressurization process, the liquid hydrogen flow can be adjusted in real time, the liquid hydrogen flow supplied to the liquid using terminal is prevented from exceeding a preset safety value, and the use stability and the use safety of the system are improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent variations made in accordance with the technical spirit of the present invention may fall within the scope of the present invention as claimed.
Claims (5)
1. The utility model provides a liquid hydrogen pressure boost hydrogen supply system which characterized in that: the system comprises a liquid hydrogen source, a double-acting liquid hydrogen booster pump, a backflow precooling pipeline, a liquid hydrogen input pipeline and a liquid hydrogen output pipeline;
the liquid hydrogen source is connected with an inlet of the double-acting liquid hydrogen booster pump through a liquid hydrogen input pipeline, and a first automatic cut-off valve, a first check valve, a first flow sensor and a first temperature sensor are arranged on the liquid hydrogen input pipeline;
a liquid phase outlet of the double-acting liquid hydrogen booster pump is connected with an inlet of an intermediate conveying pipeline, an outlet of the intermediate conveying pipeline is connected with an inlet of a liquid hydrogen output pipeline, an outlet of the liquid hydrogen output pipeline is used for being connected with a liquid using terminal, a second automatic cut-off valve is arranged on the liquid hydrogen output pipeline, a second temperature sensor is arranged on the liquid hydrogen output pipeline in front of the second automatic cut-off valve, and a third temperature sensor and a second flow sensor are arranged on the liquid hydrogen output pipeline behind the second automatic cut-off valve;
the inlet of the backflow pre-cooling pipeline is communicated with the outlet of the intermediate conveying pipeline and the inlet of the liquid hydrogen output pipeline at the same time, the outlet of the backflow pre-cooling pipeline is communicated with the inlet of the double-acting liquid hydrogen booster pump, and the backflow pre-cooling pipeline is provided with a second check valve and a first automatic regulating valve;
the gas phase outlet of the double-acting liquid hydrogen booster pump is connected with the inlet of a first gas hydrogen output pipeline, a third automatic stop valve is arranged on the first gas hydrogen output pipeline, the outlet of the first gas hydrogen output pipeline is connected with the tube side inlet of a first sleeve heat exchanger, the tube side outlet of the first sleeve heat exchanger is connected with the inlet of a second gas hydrogen output pipeline, the outlet of the second gas hydrogen output pipeline is connected with the inlet of a third gas hydrogen output pipeline, the outlet of the third gas hydrogen output pipeline is used for being connected with a gas using terminal, a fourth automatic stop valve is arranged on the second gas hydrogen output pipeline, and a fourth temperature sensor is arranged on the third gas hydrogen output pipeline;
the double-acting liquid hydrogen booster pump is characterized in that a first heat transfer and heat preservation pipeline is wrapped outside a transmission unit of the double-acting liquid hydrogen booster pump, one end of the first heat transfer and heat preservation pipeline is connected with a tube pass inlet of a second sleeve heat exchanger, the other end of the first heat transfer and heat preservation pipeline is connected with a tube pass outlet of the second sleeve heat exchanger through a first conveying pump, the first heat transfer and heat preservation pipeline, the tube pass of the second sleeve heat exchanger and the first conveying pump form a closed first heat exchange loop, and a heat exchange medium flows through the first heat exchange loop; the shell pass outlet of the second sleeve heat exchanger is connected with the shell pass inlet of the first sleeve heat exchanger through a second conveying pump, the shell pass outlet of the first sleeve heat exchanger is connected with the shell pass inlet of the second sleeve heat exchanger, the shell pass of the first sleeve heat exchanger, the shell pass of the second sleeve heat exchanger and the second conveying pump form a closed second heat exchange loop, and heat exchange media flow through the second heat exchange loop.
2. A liquid hydrogen pressurized hydrogen supply system according to claim 1, characterized in that: an inlet of the fourth gas-hydrogen output pipeline is connected with a tube side outlet of the first sleeve heat exchanger, an outlet of the fourth gas-hydrogen output pipeline is connected with an inlet of the third gas-hydrogen output pipeline, and a fifth automatic shut-off valve, an air-temperature heat exchanger and a sixth automatic shut-off valve are sequentially arranged on the fourth gas-hydrogen output pipeline along the gas-hydrogen conveying direction.
3. A liquid hydrogen pressurized hydrogen supply system according to claim 1, characterized in that: a first pressure sensor is arranged on the liquid hydrogen input pipeline.
4. A liquid hydrogen pressurized hydrogen supply system according to claim 1, characterized in that: and a second pressure sensor is arranged on a liquid hydrogen output pipeline in front of the second automatic cut-off valve.
5. A liquid hydrogen pressurized hydrogen supply system according to claim 1, characterized in that: and a third pressure sensor is arranged on a liquid hydrogen output pipeline behind the second automatic cut-off valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211421549.9A CN115727260A (en) | 2022-11-15 | 2022-11-15 | Liquid hydrogen pressure boost hydrogen supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211421549.9A CN115727260A (en) | 2022-11-15 | 2022-11-15 | Liquid hydrogen pressure boost hydrogen supply system |
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| CN115727260A true CN115727260A (en) | 2023-03-03 |
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| CN202211421549.9A Pending CN115727260A (en) | 2022-11-15 | 2022-11-15 | Liquid hydrogen pressure boost hydrogen supply system |
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