Conversion system for efficiently converting low-temperature liquid hydrogen into high-pressure gaseous hydrogen

Abstract

The utility model belongs to the technical field of hydrogen energy utilization, and particularly relates to a conversion system for efficiently converting low-temperature liquid hydrogen into high-pressure gaseous hydrogen. The pressurizing system is suitable for pressurizing the liquid gas in the gas storage system twice; the conveying system is suitable for collecting the pressurized gas; wherein the gas storage system, the pressurization system and the conveying system are connected through pipelines. According to the efficient conversion system for converting the low-temperature liquid hydrogen into the high-pressure gaseous hydrogen, the use of a high-pressure gas compressor is avoided, and boiling in the process of converting the low-temperature liquid hydrogen into the high-pressure gaseous hydrogen is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen energy utilization, and in particular relates to a conversion system for efficiently converting low-temperature liquid hydrogen into high-pressure gaseous hydrogen. Background Art

[0002] With the rapid development of the hydrogen energy industry, liquid hydrogen, as a high-energy-density hydrogen storage method, has broad application prospects in aerospace, aviation, transportation, and industry. However, liquid hydrogen needs to be stored at extremely low temperatures, and the conversion to high-pressure gaseous hydrogen involves complex physical changes and high technical difficulties. Currently, the market lacks an efficient, safe, and reliable system for converting low-temperature liquid hydrogen into high-pressure gaseous hydrogen.

[0003] The existing method for converting liquid hydrogen into gaseous hydrogen involves vaporizing low-pressure liquid hydrogen, typically below 5 bar, into high-pressure gaseous hydrogen. This gaseous hydrogen is then stored in a reservoir, which must maintain sufficient pressure to facilitate subsequent hydrogen distribution to its target pressure. Furthermore, a high-pressure gas compressor is required to vent the gaseous hydrogen from the vaporizer so that additional liquid hydrogen can be refilled from the low-pressure, cryogenic storage. This existing method suffers from boil-off, which can result in emissions losses (up to 34%), and the operating costs associated with the high-pressure compressor are relatively high.

[0004] Therefore, in order to solve the technical problem of boiling during the conversion of low-temperature liquid hydrogen into high-pressure gaseous hydrogen, it is urgent to provide an efficient conversion system for converting low-temperature liquid hydrogen into high-pressure gaseous hydrogen.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Utility Model Content

[0006] The present disclosure provides a highly efficient conversion system for cryogenic liquid hydrogen to high-pressure gaseous hydrogen, comprising:

[0007] Gas storage system;

[0008] a pressurizing system adapted to pressurize the liquid gas in the gas storage system twice;

[0009] a delivery system adapted to collect the pressurized gas;

[0010] in,

[0011] The gas storage system, the pressurizing system and the delivery system are connected via pipelines.

[0012] In an optional embodiment, the gas storage system includes a liquid gas storage tank and a speed regulating valve connected to the liquid gas storage tank, wherein the speed regulating valve is suitable for adjusting the speed at which the liquid gas storage tank discharges the liquid gas.

[0013] In an optional embodiment, the boosting system includes a first boosting pump connected to the speed regulating valve to generate primary pressurized hydrogen, which is output sequentially through a converter and an accumulator;

[0014] a second booster pump, generating secondary pressurized hydrogen and delivering the hydrogen to the delivery system via the accumulator;

[0015] In an optional embodiment, a refrigerator is further provided between the second booster pump and the delivery system.

[0016] In an optional embodiment, the delivery system includes a gas storage tank and a gas storage tank connected to the gas storage tank, and a pressure sensor is signal-connected to the gas storage tank.

[0017] In an optional embodiment, a valve is further provided between the liquid gas storage tank and the speed regulating valve, the valve comprising a valve seat, a valve core slidably arranged in the valve seat, and a liquid inlet and a liquid outlet arranged at both ends of the valve seat, wherein the liquid inlet and the liquid outlet are respectively connected to the corresponding pipelines.

[0018] In an optional embodiment, a plurality of insertion holes are provided at the bottom of the channel in the valve seat, and a plurality of pins adapted to the insertion holes are provided at the bottom of the valve core.

[0019] In an optional embodiment, an adjusting chamber is provided in the valve core, and a valve stem is connected above the valve core, and the valve stem is threadedly connected to the inner wall of the adjusting chamber.

[0020] In an optional embodiment, a locking ring is further provided on the valve stem, a locking opening is opened on the locking ring, and a locking rod is rotatably provided on the valve seat, wherein the locking rod is rotated into the locking opening to limit the upward movement of the valve stem.

[0021] In an optional embodiment, a limit disk is provided on the valve stem, and the limit disk is suitable for abutting against the upper end of the valve seat to limit the stroke of the valve core.

[0022] The beneficial effect of the present invention is that the high-efficiency low-temperature liquid hydrogen to high-pressure gaseous hydrogen conversion system, by providing a gas storage system, a pressurizing system, and a delivery system, can convert low-temperature liquid hydrogen into high-pressure gaseous hydrogen without the use of a high-pressure gas compressor, thereby avoiding boiling during the conversion process. At the same time, the high cost of operating a high-pressure compressor is also avoided.

[0023] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited herein and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A flow chart of a conversion system for converting high-efficiency low-temperature liquid hydrogen into high-pressure gaseous hydrogen provided by an embodiment of the present disclosure;

[0027] Figure 2 A three-dimensional diagram of a valve of a conversion system for converting high-efficiency, low-temperature liquid hydrogen into high-pressure gaseous hydrogen provided by an embodiment of the present disclosure;

[0028] Figure 3 A structural diagram of a valve in a conversion system for converting high-efficiency, low-temperature liquid hydrogen into high-pressure gaseous hydrogen, provided by an embodiment of the present disclosure;

[0029] In the picture:

[0030] 1. Gas storage system; 101. Liquid gas storage tank; 102. Speed ​​regulating valve; 2. Booster system; 201. First booster pump; 202. Converter; 203. Accumulator; 204. Second booster pump; 3. Delivery system; 301. Gaseous gas storage tank; 302. Gas storage tank; 4. Refrigerator; 5. Valve; 501. Valve seat; 502. Valve core; 503. Liquid inlet; 504. Liquid outlet; 505. Latch; 506. Adjustment chamber; 507. Valve stem; 508. Locking ring; 509. Locking rod; 510. Limit plate. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an" and "the" may also be intended to include plural forms, unless otherwise clearly indicated herein. The terms "comprise", "include" and "have" are inclusive and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the particular order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0033] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0034] Research has revealed shortcomings in existing technologies: The existing method for converting liquid hydrogen into gaseous hydrogen involves vaporizing low-pressure liquid hydrogen, typically below 5 bar, into high-pressure gaseous hydrogen. This gaseous hydrogen is then stored in a reservoir, which must maintain sufficient pressure to facilitate subsequent hydrogen distribution to its target pressure. Furthermore, a high-pressure gas compressor is required to vent gaseous hydrogen from the vaporizer to allow for additional liquid hydrogen to be refilled from the low-pressure, cryogenic storage. This existing method suffers from boiling and venting losses (up to 34%), and the operating costs associated with the high-pressure compressor are relatively high.

[0035] Therefore, in order to solve the technical problems of boiling and emission losses during the conversion of low-temperature liquid hydrogen into high-pressure gaseous hydrogen, it is urgent to provide an efficient conversion system for converting low-temperature liquid hydrogen into high-pressure gaseous hydrogen.

[0036] The defects in the above solutions are the results obtained by the utility model inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article should be the contributions made by the utility model inventor to the present invention during the disclosure process.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0039] See also Figure 1This embodiment provides a highly efficient conversion system for converting cryogenic liquid hydrogen into high-pressure gaseous hydrogen, comprising: a gas storage system 1; a boosting system 2 adapted to boost the liquid gas in the gas storage system 1 twice; and a delivery system 3 adapted to collect the boosted gas. The gas storage system 1, boosting system 2, and delivery system 3 are connected by pipelines. The gas storage system 1 comprises a liquid gas storage tank 101 and a speed regulating valve 102 connected to the liquid gas storage tank 101. The liquid gas storage tank 101 is adapted to store cryogenic liquid hydrogen, and the speed regulating valve 102 is adapted to regulate the rate at which the liquid gas is discharged from the liquid gas storage tank 101. The boosting system 2 comprises a first boosting pump 201 connected to the speed regulating valve 102 to generate primary pressurized hydrogen, which is then outputted sequentially through a converter 202 and an accumulator 203. A second boosting pump 204 generates secondary pressurized hydrogen, which is then delivered to the delivery system 3 via the accumulator 203. The cryogenic liquid hydrogen is pressurized by the first booster pump 201 and then transferred to the converter 202. The converter 202 is suitable for converting the cryogenic liquid hydrogen into sub-high-pressure gaseous hydrogen. Furthermore, the sub-high-pressure gaseous hydrogen is input into the accumulator 203 through a pipeline. The accumulator 203 is suitable for compensating or reducing the pressure of the sub-high-pressure gaseous hydrogen so as to maintain the pressure of the sub-high-pressure gaseous hydrogen stable. The accumulator 203 is connected to the second booster pump 204, and the other end of the second booster pump 204 is connected to the delivery system 3. The sub-high-pressure gaseous hydrogen in the accumulator 203 is pressurized again by the second booster pump 204 to become high-pressure gaseous hydrogen. Preferably, a refrigerator 4 is also provided between the second booster pump 204 and the delivery system 3. The refrigerator 4 is suitable for reducing the temperature of the high-pressure gaseous hydrogen to prevent the high-pressure gaseous hydrogen from being too hot and decomposing into hydrogen atoms. Delivery system 3 includes a gas storage tank 301 and a gas storage tank 302 connected to gas storage tank 301. A pressure sensor is connected to gas storage tank 301 to detect whether the pressure of the high-pressure gaseous hydrogen in gas storage tank 301 meets the required pressure. High-pressure gaseous hydrogen is delivered from gas storage tank 301 to gas storage tank 302 for storage and transport.

[0040] In an alternative embodiment, see Figures 1 to 3A valve 5 is also provided between the liquid gas storage tank 101 and the speed regulating valve 102. The valve 5 includes a valve seat 501, a valve core 502 slidingly arranged in the valve seat 501, and a liquid inlet 503 and a liquid outlet 504 arranged at both ends of the valve seat 501, wherein the liquid inlet 503 and the liquid outlet 504 are respectively connected to corresponding pipelines. A plurality of sockets are provided at the bottom of the channel in the valve seat 501, and a plurality of latches 505 adapted to the sockets are provided at the bottom of the valve core 502. Optionally, the upper end of the valve stem 507 can be connected to a lifting cylinder, and the lifting cylinder drives the valve stem 507 to move upward, so that the valve stem 507 drives the valve core 502 to move in a direction away from the bottom of the valve channel, at which time the valve is in an open state. Similarly, the lifting cylinder drives the valve stem 507 to move downward, so that the valve stem 507 drives the valve core 502 to move in a direction close to the bottom of the valve channel until the latch 505 is inserted into the corresponding socket, and the valve is in a closed state. The pin 505 cooperates with the socket to stabilize the valve core 502 to prevent the valve core 502 from being loosened due to long-term impact of liquid hydrogen, thereby preventing the escape of liquid hydrogen.

[0041] In an alternative embodiment, please continue to see Figure 3 The valve stem 507 is also provided with a locking ring 508, which has a locking opening. A locking rod 509 is rotatably provided on the valve seat 501, wherein the locking rod 509 rotates into the locking opening to limit the upward movement of the valve stem 507. A limit plate 510 is provided on the valve stem 507, which is suitable for abutting against the upper end of the valve seat 501 to limit the stroke of the valve core 502. An adjustment chamber 506 is provided in the valve core 502, and a valve stem 507 is connected to the top of the valve core 502. The valve stem 507 is threadedly connected to the inner wall of the adjustment chamber 506. By rotating the valve stem 507, the distance between the limit plate 510 and the valve core 502 can be adjusted, thereby adjusting the degree of opening of the valve. When the distance between the limit plate 510 and the valve core 502 is short, the valve is opened more; when the distance between the limit plate 510 and the valve core 502 is long, the valve is opened less. By adjusting the opening degree of the valve 5, the liquid hydrogen flow rate is regulated.

[0042] In summary, the present high-efficiency low-temperature liquid hydrogen to high-pressure gaseous hydrogen conversion system delivers liquid hydrogen to the boosting system 2 via the gas storage system 1. The boosting system 2 boosts the liquid hydrogen twice via the first boosting pump 201 and the second boosting pump 204 to convert the liquid hydrogen into high-pressure gaseous hydrogen. The valve 5 between the gas storage system 1 and the boosting system 2 is suitable for adjusting the flow rate of the liquid hydrogen. The secondary boosting of the boosting system 2 eliminates the use of a high-pressure compressor, thereby avoiding boiling during the conversion of low-temperature liquid hydrogen into high-pressure gaseous hydrogen. At the same time, the high cost of operating the high-pressure compressor is also avoided.

[0043] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] Spatially relative terms, such as "inside," "outside," "below," "beneath," "down," "above," "on," etc., may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientations depicted in the figures, spatially relative terms may be intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as being "below" or "below" other elements or features will be oriented to be "above" the other elements or features. Thus, the example term "below" may encompass both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0045] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-efficiency low-temperature liquid hydrogen to high-pressure gaseous hydrogen conversion system, characterized in that: include: Gas storage system (1); A pressurizing system (2) adapted to pressurize the liquid gas in the gas storage system (1) twice; a delivery system (3) adapted to collect the pressurized gas; in, The gas storage system (1), the pressure boosting system (2) and the delivery system (3) are connected via pipelines.

2. The system according to claim 1, wherein: The gas storage system (1) comprises a liquid gas storage tank (101) and a speed regulating valve (102) in communication with the liquid gas storage tank (101), wherein: The speed regulating valve (102) is suitable for regulating the speed at which the liquid gas storage tank (101) discharges the liquid gas.

3. The system according to claim 2, wherein: The boosting system (2) includes a first boosting pump (201) connected to the speed regulating valve (102) to generate primary boosted hydrogen, which is outputted through a converter (202) and an accumulator (203) in sequence; The second booster pump (204) generates secondary boosted hydrogen and delivers it to the delivery system (3) via the accumulator (203).

4. The system according to claim 3, wherein: A refrigerator (4) is also provided between the second booster pump (204) and the delivery system (3).

5. The system according to claim 3, wherein: The delivery system (3) comprises a gas storage tank (301) and a gas storage tank (302) in communication with the gas storage tank (301), and a pressure sensor is connected to the gas storage tank (301).

6. The system according to claim 5, wherein: A valve (5) is further provided between the liquid gas storage tank (101) and the speed regulating valve (102), the valve (5) comprising a valve seat (501), a valve core (502) slidably disposed in the valve seat (501), and a liquid inlet (503) and a liquid outlet (504) disposed at both ends of the valve seat (501), wherein: The liquid inlet (503) and the liquid outlet (504) are respectively communicated with the corresponding pipelines.

7. The system according to claim 6, wherein: A plurality of insertion holes are provided at the bottom of the channel in the valve seat (501), and a plurality of latches (505) adapted to the insertion holes are provided at the bottom of the valve core (502).

8. The system according to claim 7, wherein: The valve core (502) is provided with a regulating chamber (506), and A valve stem (507) is connected above the valve core (502), and the valve stem (507) is threadedly connected to the inner wall of the regulating chamber (506).

9. The system according to claim 8, wherein: The valve stem (507) is further provided with a locking ring (508), the locking ring (508) is provided with a locking opening, and, A locking rod (509) is rotatably provided on the valve seat (501), wherein: The locking rod (509) rotates into the locking opening to limit the upward movement of the valve stem (507).

10. The system according to claim 9, wherein: A limit plate (510) is provided on the valve stem (507), and the limit plate (510) is suitable for abutting against the upper end of the valve seat (501) to limit the stroke of the valve core (502).

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