Vacuum multi-layer heat insulation liquid hydrogen container and using method

Abstract

The invention discloses a vacuum multi-layer heat insulation liquid hydrogen container and a using method, the vacuum multi-layer heat insulation liquid hydrogen container comprises a liquid hydrogen storage tank outer tank and a liquid hydrogen storage tank inner tank located in the liquid hydrogen storage tank outer tank, and a nitrogen heat insulation structure, a methane gas heat insulation structure, a carbon dioxide heat insulation structure and a radiation heat insulation structure are sequentially arranged between the liquid hydrogen storage tank outer tank and the liquid hydrogen storage tank inner tank from inside to outside. According to the liquid hydrogen storage tank, efficient heat insulation of the liquid hydrogen storage tank and gradient utilization of the evaporation gas cooling capacity are comprehensively achieved through the liquid hydrogen evaporation gas cooling capacity and the multiple heat insulation layers internally filled with gas with different freezing point temperatures, meanwhile, the different heat insulation layers are isolated from one another, and the problem that the vacuum degree of a traditional liquid hydrogen storage tank is prone to damage is solved. The functions of the nitrogen heat insulation layer, the methane gas heat insulation layer, the carbon dioxide heat insulation layer and the radiation heat insulation layer can be regulated and controlled through corresponding valves, so that the liquid hydrogen storage tank has heat insulation regulation capacity, application scenes with different evaporation rate requirements can be effectively met, and emergency discharge of a hydrogen medium in the liquid hydrogen storage tank is achieved in some specific scenes.

Description

Technical Field

[0001] The present invention relates to the field of liquid hydrogen technology, and in particular to a vacuum multi-layer insulated liquid hydrogen container and a use method thereof. Background Art

[0002] The low-temperature liquid hydrogen storage and supply mode has the advantages of high hydrogen storage density (high hydrogen carrying density), low transportation cost, high vaporization purity, low storage and transportation pressure, and high safety of use. It can effectively control the overall cost, and there are no complex unsafe factors involved in the transportation process. In addition, the advantages of liquid hydrogen in production, storage, and transportation are more suitable for the large-scale and commercial supply of hydrogen energy. At the same time, with the rapid development of the hydrogen energy terminal application industry, the demand for liquid hydrogen will also be pushed back. The liquid hydrogen technology route will inevitably become one of the important technical methods for the development and application of domestic civilian hydrogen energy. One of the core issues in the use of liquid hydrogen is vaporization loss. Because the boiling point of hydrogen is very low, liquid hydrogen must be stored in super-insulated storage tanks.

[0003] However, even if the storage tank has good insulation performance, liquid hydrogen will always evaporate during storage and transportation. The evaporation of liquid hydrogen will result in two kinds of losses. One is the loss of cold capacity, that is, the electrical energy consumed by refrigeration during the hydrogen liquefaction process. The other is the loss of hydrogen fuel. The vaporized hydrogen will cause the internal pressure of the storage tank to rise and must be discharged in time. A typical liquid hydrogen storage tank adopts a double-layer shell structure with a vacuum interlayer in the middle, and multiple layers of radiation protection screens are also set. The vacuum degree of the vacuum insulation layer of a small storage tank is generally higher (less than 10^-2Pa), while the vacuum degree of the vacuum insulation layer of a large storage tank is lower (1Pa). There will be a certain structural support between the double shells.

[0004] However, conventional multi-layer insulated liquid hydrogen storage tanks have problems such as the vacuum being easily destroyed and the distribution of multi-layer insulation fillers and radiation shields requiring precise design, making it difficult to adapt to more liquid hydrogen medium application scenarios in the future. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art, and to propose a vacuum multi-layer insulated liquid hydrogen container and a method of use, which utilizes the cold capacity of liquid hydrogen and gases with different freezing point temperatures to comprehensively realize efficient insulation and precise regulation of insulation capacity, and at the same time designs a closed porous insulation connection structure and a specific distribution of multi-layer radiation protection screens to further enhance the insulation capacity of the liquid hydrogen storage tank.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A vacuum multi-layer insulated liquid hydrogen container comprises a liquid hydrogen storage tank outer tank and a liquid hydrogen storage tank inner tank located therein, wherein a nitrogen insulation structure, a methane insulation structure, a carbon dioxide insulation structure and a radiation insulation structure are sequentially arranged between the liquid hydrogen storage tank outer tank and the liquid hydrogen storage tank inner tank from the inside to the outside, and the above structures surround and fill the space between the liquid hydrogen storage tank outer tank and the liquid hydrogen storage tank inner tank in layers, and the liquid hydrogen storage tank inner tank is respectively connected to a liquid hydrogen filling pipeline, a hydrogen supply pipeline and a hydrogen utilization pipeline, and the liquid hydrogen filling pipeline, the hydrogen supply pipeline and the hydrogen utilization pipeline all pass through the liquid hydrogen storage tank outer tank and are correspondingly installed with a liquid hydrogen filling valve, a hydrogen supply valve and a fourth hydrogen valve.

[0007] Preferably, the nitrogen insulation structure comprises a nitrogen insulation layer, and the upper and lower ends of the nitrogen insulation layer are both provided with closed porous insulation connection structures.

[0008] Preferably, the methane gas insulation structure includes a methane gas insulation layer and a first hydrogen valve installed on the hydrogen utilization pipeline, a methane cooling branch is buried in the methane gas insulation layer, the methane cooling branch is connected in parallel with the first hydrogen valve, a section of the methane cooling branch located outside the methane gas insulation layer is provided with a methane cooling valve, and a section of the methane cooling branch located inside the methane gas insulation layer is provided with a methane filling valve.

[0009] Preferably, the carbon dioxide insulation structure includes a carbon dioxide insulation layer and a second hydrogen valve installed on the hydrogen utilization pipeline, a carbon dioxide cooling branch is arranged in the carbon dioxide insulation layer, the carbon dioxide cooling branch is arranged in parallel with the second hydrogen valve, and the carbon dioxide cooling branch is located in the inner and outer sections of the carbon dioxide insulation layer, and a carbon dioxide filling valve and a carbon dioxide cooling valve are respectively installed.

[0010] Preferably, the radiation insulation structure includes a radiation insulation layer and a third hydrogen valve installed on the hydrogen utilization pipeline, a radiation cooling branch is arranged in the radiation insulation layer, the radiation cooling branch is arranged in parallel with the third hydrogen valve, and the radiation cooling branch is located in the inner and outer sections of the radiation insulation layer, and a para-orthohydrogen converter and a radiation cooling valve are respectively arranged correspondingly.

[0011] Preferably, a plurality of radiation protection screens are arranged inside the radiation insulation layer.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention utilizes the cooling capacity of liquid hydrogen vapor and the multi-layer insulation layer filled with gas with different freezing point temperatures to comprehensively realize the efficient insulation of the liquid hydrogen storage tank and the step-by-step utilization of the cooling capacity of the vapor. At the same time, different insulation layers are isolated from each other, avoiding the problem that the vacuum degree of the traditional liquid hydrogen storage tank is easily destroyed. A closed porous insulation connection structure is designed in the nitrogen insulation layer close to the inner tank, and a multi-layer radiation protection screen coupled to the para-orthohydrogen converter is set in the radiation insulation layer close to the outer tank, which effectively overcomes the problem of large heat conduction leakage in the low temperature zone and large radiation leakage in the high temperature zone of the liquid hydrogen storage tank.

[0013] The para-orthohydrogen converter is set in the outermost radiation insulation layer. At this time, the temperature of the evaporated hydrogen has increased significantly, and the para-hydrogen content that can be converted to para-orthohydrogen has also increased synchronously, so that the cooling capacity of the para-orthohydrogen conversion is maximized. The functions of the nitrogen insulation layer, methane insulation layer, carbon dioxide insulation layer, and radiation insulation layer can be controlled by corresponding valves, so the liquid hydrogen storage tank has the ability to adjust insulation, which can effectively meet the application scenarios with different evaporation rate requirements, and realize the emergency discharge of hydrogen medium inside the liquid hydrogen storage tank in some specific scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more specifically and intuitively illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 The present invention provides a structural schematic diagram of a vacuum multi-layer insulated liquid hydrogen container.

[0016] In the figure: liquid hydrogen storage tank outer tank 1, liquid hydrogen storage tank inner tank 2, liquid hydrogen filling pipeline 3, liquid hydrogen filling valve 4, hydrogen supply pipeline 5, hydrogen supply valve 6, nitrogen insulation layer 7, methane insulation layer 8, carbon dioxide insulation layer 9, radiation insulation layer 10, hydrogen utilization pipeline 11, first hydrogen valve 12, second hydrogen valve 13, third hydrogen valve 14, fourth hydrogen valve 15, closed porous insulation connection structure 16, methane cooling branch 17, methane cooling valve 18, methane filling valve 19, carbon dioxide cooling branch 20, carbon dioxide cooling valve 21, carbon dioxide filling valve 22, radiation cooling branch 23, radiation cooling valve 24, para-orthohydrogen converter 25, multi-layer radiation protection screen 26. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Reference Figure 1 A vacuum multi-layer insulated liquid hydrogen container comprises a liquid hydrogen storage tank outer tank 1 and a liquid hydrogen storage tank inner tank 2 located therein, wherein a nitrogen insulation structure, a methane insulation structure, a carbon dioxide insulation structure and a radiation insulation structure are sequentially arranged between the liquid hydrogen storage tank outer tank 1 and the liquid hydrogen storage tank inner tank 2 from the inside to the outside, and the above structures surround and fill the space between the liquid hydrogen storage tank outer tank 1 and the liquid hydrogen storage tank inner tank 2 in layers, and the liquid hydrogen storage tank inner tank 2 is respectively connected with a liquid hydrogen filling pipeline 3, a hydrogen supply pipeline 5 and a hydrogen utilization pipeline 11, and the liquid hydrogen filling pipeline 3, the hydrogen supply pipeline 5 and the hydrogen utilization pipeline 11 all pass through the liquid hydrogen storage tank outer tank 1 and are correspondingly installed with a liquid hydrogen filling valve 4, a hydrogen supply valve 6 and a fourth hydrogen valve 15.

[0019] The liquid hydrogen storage tank outer tank 1 and the liquid hydrogen storage tank inner tank 2 constitute the inner and outer main parts of the multi-layer insulated liquid hydrogen storage tank. A nitrogen insulation layer 7, a methane insulation layer 8, a carbon dioxide insulation layer 9, and a radiation insulation layer 10 are arranged in sequence from the inside to the outside between the two to improve the insulation capacity.

[0020] The liquid hydrogen filling pipeline 3 is sequentially connected to the liquid hydrogen filling valve 4 and the bottom of the liquid hydrogen storage tank inner tank 2 to achieve liquid hydrogen filling; the hydrogen supply pipeline 5 is sequentially connected to the bottom of the liquid hydrogen storage tank inner tank 2 and the hydrogen supply valve 6 to achieve safe discharge of evaporated hydrogen inside the liquid hydrogen storage tank inner tank 2; The hydrogen utilization pipeline 11 is connected to the first hydrogen valve 12, the second hydrogen valve 13, the third hydrogen valve 14, and the fourth hydrogen valve 15 in sequence, and is also connected to the methane cooling branch 17, the carbon dioxide cooling branch 20, and the radiation cooling branch 23. The cooling capacity of the evaporated hydrogen is used to achieve the regulation of different insulation capacities, and the hydrogen is discharged.

[0021] In this embodiment, the nitrogen insulation structure includes a nitrogen insulation layer 7 , and closed porous insulation connection structures 16 are provided at the upper and lower ends of the nitrogen insulation layer 7 .

[0022] A closed porous insulation connection structure 16 is provided above and below the nitrogen insulation layer 7, and the cold capacity of the inner tank 2 of the liquid hydrogen storage tank is utilized to realize a vacuum porous structure, thereby weakening the heat conduction and heat transfer capacity of the external heat.

[0023] In this embodiment, the methane gas insulation structure includes a methane gas insulation layer 8 and a first hydrogen valve 12 installed on a hydrogen utilization pipeline 11. A methane cooling branch 17 is buried in the methane gas insulation layer 8. The methane cooling branch 17 is connected in parallel with the first hydrogen valve 12. A section of the methane cooling branch 17 located outside the methane gas insulation layer 8 is provided with a methane cooling valve 18, and a section of the methane cooling branch 17 located inside the methane gas insulation layer 8 is provided with a methane filling valve 19.

[0024] The methane cooling branch 17 is connected in parallel with the first hydrogen valve 12 . A methane cooling valve 18 is provided outside the methane gas insulation layer 8 , and a methane filling valve 19 is provided inside the methane gas insulation layer 8 , so as to control the state of the methane gas inside the methane gas insulation layer 8 .

[0025] In this embodiment, the carbon dioxide insulation structure includes a carbon dioxide insulation layer 9 and a second hydrogen valve 13 installed on a hydrogen utilization pipeline 11. A carbon dioxide cooling branch 20 is arranged in the carbon dioxide insulation layer 9. The carbon dioxide cooling branch 20 is arranged in parallel with the second hydrogen valve 13. The carbon dioxide cooling branch 20 is located in the inner and outer sections of the carbon dioxide insulation layer 9, and a carbon dioxide filling valve 22 and a carbon dioxide cooling valve 21 are respectively installed.

[0026] The carbon dioxide cooling branch 20 is connected in parallel with the second hydrogen valve 13 , a carbon dioxide cooling valve 21 is arranged outside the carbon dioxide insulation layer 9 , and a carbon dioxide filling valve 2 is arranged inside, so as to realize the regulation of the carbon dioxide gas state inside the carbon dioxide insulation layer 9 .

[0027] In this embodiment, the radiation insulation structure includes a radiation insulation layer 10 and a third hydrogen valve 14 installed on the hydrogen utilization pipeline 11. A radiation cooling branch 23 is arranged in the radiation insulation layer 10. The radiation cooling branch 23 is arranged in parallel with the third hydrogen valve 14. The radiation cooling branch 23 is located in the radiation insulation layer 10, and the inner and outer sections are respectively provided with a para-orthohydrogen converter 25 and a radiation cooling valve 24.

[0028] The radiation cooling branch 23 is connected in parallel with the third hydrogen valve 14. A radiation cooling valve 24 is arranged outside the radiation insulation layer 10, and a para-orthohydrogen converter 25 is arranged inside to maximize the utilization of the para-orthohydrogen conversion cooling capacity of the hydrogen after heating. At the same time, a multi-layer radiation protection screen 26 is also arranged inside the radiation insulation layer 10, which, together with the closed porous insulation connection structure 16, realizes the design concept of weakening heat conduction in the low-temperature zone and weakening radiation in the high-temperature zone.

[0029] In this embodiment, a multi-layer radiation protection screen 26 is arranged inside the radiation insulation layer 10 .

[0030] A method for using a vacuum multi-layer insulated liquid hydrogen container, assuming that all valves are in a closed state, the interior of the nitrogen insulation layer 7 is filled with nitrogen during tank processing, preventing other gases from entering.

[0031] (1) Adiabatic gas filling 1) The outlet end of the hydrogen utilization pipeline 11 is connected to a methane gas source, and the fourth hydrogen valve 15, the third hydrogen valve 14, the second hydrogen valve 13, the first hydrogen valve 12, the methane cooling valve 18, and the methane filling valve 19 are opened in sequence, and the methane gas from the outside enters the methane gas insulation layer 8. After a small amount of methane gas is filled, the first hydrogen valve 12, the methane cooling valve 18, and the methane filling valve 19 are closed in sequence to complete the methane gas filling.

[0032] 2) The outlet end of the hydrogen utilization pipeline 11 is connected to the carbon dioxide gas source, and the carbon dioxide cooling valve 21 and the carbon dioxide filling valve 22 are opened in sequence, and the methane gas from the outside enters the carbon dioxide insulation layer 9. After a small amount of carbon dioxide is filled, the second hydrogen valve 13, the carbon dioxide cooling valve 21, and the carbon dioxide filling valve 22 are closed in sequence to complete the carbon dioxide gas filling. After the insulation gas filling is completed, the third hydrogen valve 14 and the fourth hydrogen valve 15 are closed in sequence.

[0033] (2) Pre-cooling and filling 1) Open the liquid hydrogen filling valve 4, methane cooling valve 18, carbon dioxide cooling valve 21, radiation cooling valve 24, and fourth hydrogen valve 15 in sequence. The front end of the liquid hydrogen filling pipeline 3 is connected to the liquid hydrogen source. Under the action of pressure, external liquid hydrogen enters the liquid hydrogen filling pipeline 3 and enters the bottom of the liquid hydrogen storage tank inner tank 2 through the liquid hydrogen filling valve 4. At this time, since the liquid hydrogen storage tank 2 is in a high temperature state, the liquid hydrogen will be vaporized into low-temperature hydrogen, and then enter the hydrogen utilization pipeline 11, and in sequence flow through the methane cooling valve 18 to enter the methane cooling branch 17, through the carbon dioxide cooling valve 21 to enter the carbon dioxide cooling branch 20, through the radiation cooling valve 24 to enter the radiation cooling branch 23, and release the cold in the secondary orthohydrogen converter 25, and then be emptied through the fourth hydrogen valve 15.

[0034] 2) The nitrogen in the nitrogen insulation layer 7 is gradually frozen under the cooling of the inner tank 2 of the liquid hydrogen storage tank, and a vacuum state is gradually formed inside; similarly, the methane in the methane insulation layer 8 is frozen under the cooling of the methane cooling branch 17, and a vacuum state is gradually formed inside; the carbon dioxide in the carbon dioxide insulation layer 9 is frozen under the cooling of the carbon dioxide cooling branch 20, and a vacuum state is gradually formed inside; the temperature of the hydrogen entering the radiation cooling branch 23 has risen significantly, so the corresponding para-orthohydrogen conversion cooling capacity is maximized, and the multi-layer radiation protection screen 26 is cooled to reduce the radiation capacity of the high temperature area. As the pre-cooling continues, the insulation capacity of the nitrogen insulation layer 7, the methane insulation layer 8, the carbon dioxide insulation layer 9, and the radiation insulation layer 10 continues to increase until the overall temperature of the inner tank 2 of the liquid hydrogen storage tank reaches the liquid hydrogen temperature.

[0035] 3) Start filling with liquid hydrogen. When the liquid hydrogen level inside the inner tank 2 of the liquid hydrogen storage tank reaches the set height, close the liquid hydrogen filling valve 4, the filling is completed, and the current state is maintained for long-term storage.

[0036] (3) Hydrogen supply 1) The hydrogen supply pipeline 5 is connected to the subsequent hydrogen-using device, and the hydrogen supply valve 6 is opened to start hydrogen supply; 2) When the hydrogen supply needs to be increased, the third hydrogen valve 14 is opened and the radiation cooling valve 24 is closed, so that hydrogen no longer enters the radiation insulation layer 10, and the corresponding radiation insulation capacity is weakened; 3) When it is necessary to further increase the hydrogen supply, on the basis of the above operation, the second hydrogen valve 13 is continued to be opened and the carbon dioxide cooling valve 21 is closed, hydrogen no longer enters the carbon dioxide insulation layer 9, the solid carbon dioxide frozen in the carbon dioxide insulation layer 9 begins to vaporize, the vacuum is destroyed, and the thermal conductivity of the carbon dioxide insulation layer 9 increases; 4) When it is necessary to further increase the hydrogen supply, on the basis of the above operation, the first hydrogen valve 12 is continued to be opened and the methane cooling valve 18 is closed, hydrogen no longer enters the methane gas insulation layer 8, the solid methane frozen in the methane gas insulation layer 8 begins to vaporize, the vacuum is destroyed, and the thermal conductivity of the methane gas insulation layer 8 increases; 5) The above steps can be performed sequentially, in reverse order or simultaneously, depending on the hydrogen supply demand.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vacuum multi-layer insulated liquid hydrogen container, comprising a liquid hydrogen storage tank outer tank (1) and a liquid hydrogen storage tank inner tank (2) located therein, characterized in that: A nitrogen insulation structure, a methane insulation structure, a carbon dioxide insulation structure and a radiation insulation structure are sequentially arranged between the liquid hydrogen storage tank outer tank (1) and the liquid hydrogen storage tank inner tank (2) from the inside to the outside. The above structures surround and fill the space between the liquid hydrogen storage tank outer tank (1) and the liquid hydrogen storage tank inner tank (2) in layers. The liquid hydrogen storage tank inner tank (2) is respectively connected to a liquid hydrogen filling pipeline (3), a hydrogen supply pipeline (5) and a hydrogen utilization pipeline (11). The liquid hydrogen filling pipeline (3), the hydrogen supply pipeline (5) and the hydrogen utilization pipeline (11) all penetrate the liquid hydrogen storage tank outer tank (1) and are correspondingly installed with a liquid hydrogen filling valve (4), a hydrogen supply valve (6) and a fourth hydrogen valve (15).

2. A vacuum multi-layer insulated liquid hydrogen container according to claim 1, characterized in that: The nitrogen thermal insulation structure comprises a nitrogen thermal insulation layer (7), and closed porous thermal insulation connection structures (16) are provided at the upper and lower ends of the nitrogen thermal insulation layer (7).

3. A vacuum multi-layer insulated liquid hydrogen container according to claim 2, characterized in that: The methane gas insulation structure comprises a methane gas insulation layer (8) and a first hydrogen valve (12) installed on a hydrogen utilization pipeline (11); a methane cooling branch (17) is buried in the methane gas insulation layer (8); the methane cooling branch (17) is connected in parallel with the first hydrogen valve (12); a section of the methane cooling branch (17) located outside the methane gas insulation layer (8) is provided with a methane cooling valve (18); and a section of the methane cooling branch (17) located inside the methane gas insulation layer (8) is provided with a methane filling valve (19).

4. A vacuum multi-layer insulated liquid hydrogen container according to claim 3, characterized in that: The carbon dioxide insulation structure comprises a carbon dioxide insulation layer (9) and a second hydrogen valve (13) installed on a hydrogen utilization pipeline (11); a carbon dioxide cooling branch (20) is arranged in the carbon dioxide insulation layer (9); the carbon dioxide cooling branch (20) and the second hydrogen valve (13) are arranged in parallel; the carbon dioxide cooling branch (20) is located at the inner and outer sections of the carbon dioxide insulation layer (9) and is respectively provided with a carbon dioxide filling valve (22) and a carbon dioxide cooling valve (21).

5. A vacuum multi-layer insulated liquid hydrogen container according to claim 4, characterized in that: The radiation insulation structure comprises a radiation insulation layer (10) and a third hydrogen valve (14) installed on a hydrogen utilization pipeline (11); a radiation cooling branch (23) is arranged in the radiation insulation layer (10); the radiation cooling branch (23) and the third hydrogen valve (14) are arranged in parallel; and the radiation cooling branch (23) is located at inner and outer sections of the radiation insulation layer (10), and a para-orthohydrogen converter (25) and a radiation cooling valve (24) are respectively arranged correspondingly.

6. A vacuum multi-layer insulated liquid hydrogen container according to claim 5, characterized in that: A multi-layer radiation protection screen (26) is arranged inside the radiation insulation layer (10).

7. The method for using a vacuum multi-layer insulated liquid hydrogen container according to claim 6, characterized in that: The usage is as follows: Assuming that all valves are in the closed state, the nitrogen insulation layer (7) is filled with nitrogen during the tank processing to prevent other gases from entering; (1) Adiabatic gas filling 1) The outlet end of the hydrogen utilization pipeline (11) is connected to a methane gas source, and the fourth hydrogen valve (15), the third hydrogen valve (14), the second hydrogen valve (13), the first hydrogen valve (12), the methane cooling valve (18), and the methane filling valve (19) are opened in sequence, and methane gas from the outside enters the methane gas insulation layer (8). After a small amount of methane gas is filled, the first hydrogen valve (12), the methane cooling valve (18), and the methane filling valve (19) are closed in sequence to complete the methane gas filling; 2) The outlet end of the hydrogen utilization pipeline (11) is connected to a carbon dioxide gas source, and the carbon dioxide cooling valve (21) and the carbon dioxide filling valve (22) are opened in sequence, so that methane gas from the outside enters the carbon dioxide insulation layer (9). After a small amount of carbon dioxide is filled, the second hydrogen valve (13), the carbon dioxide cooling valve (21), and the carbon dioxide filling valve (22) are closed in sequence to complete the carbon dioxide gas filling. After the insulation gas filling is completed, the third hydrogen valve (14) and the fourth hydrogen valve (15) are closed in sequence; (2) Pre-cooling and filling 1) Open the liquid hydrogen filling valve (4), the methane cooling valve (18), the carbon dioxide cooling valve (21), the radiation cooling valve (24), and the fourth hydrogen valve (15) in sequence. The front end of the liquid hydrogen filling pipeline (3) is connected to the liquid hydrogen source. Under the action of pressure, external liquid hydrogen enters the liquid hydrogen filling pipeline (3) and enters the bottom of the liquid hydrogen storage tank inner tank (2) through the liquid hydrogen filling valve (4). At this time, since the liquid hydrogen storage tank (2) is in a high temperature state, the liquid hydrogen will be vaporized into low-temperature hydrogen, and then enter the hydrogen utilization pipeline (11), and in sequence flow through the methane cooling valve (18) into the methane cooling branch (17), through the carbon dioxide cooling valve (21) into the carbon dioxide cooling branch (20), through the radiation cooling valve (24) into the radiation cooling branch (23), and release the cold in the secondary orthohydrogen converter (25), and then be emptied through the fourth hydrogen valve (15); 2) The nitrogen in the nitrogen insulation layer (7) is gradually frozen under the cooling of the inner tank (2) of the liquid hydrogen storage tank, and a vacuum state is gradually formed inside; similarly, the methane in the methane insulation layer (8) is frozen under the cooling of the methane cooling branch (17), and a vacuum state is gradually formed inside; the carbon dioxide in the carbon dioxide insulation layer (9) is frozen under the cooling of the carbon dioxide cooling branch (20), and a vacuum state is gradually formed inside; the temperature of the hydrogen entering the radiation cooling branch (23) has risen significantly, so the corresponding para-orthohydrogen conversion cooling capacity is maximized, and the multi-layer radiation protection screen (26) is cooled to reduce the radiation capacity of the high temperature area. As the pre-cooling continues, the insulation capacity of the nitrogen insulation layer (7), the methane insulation layer (8), the carbon dioxide insulation layer (9), and the radiation insulation layer (10) continues to increase until the overall temperature of the inner tank (2) of the liquid hydrogen storage tank reaches the liquid hydrogen temperature; 3) Start filling with liquid hydrogen. When the liquid hydrogen level inside the inner tank (2) of the liquid hydrogen storage tank reaches a set height, close the liquid hydrogen filling valve (4), and the filling is completed. The current state is maintained for long-term storage. (3) Hydrogen supply 1) The hydrogen supply pipeline (5) is connected to the subsequent hydrogen-using device, and the hydrogen supply valve (6) is opened to start hydrogen supply; 2) When the hydrogen supply needs to be increased, the third hydrogen valve (14) is opened and the radiation cooling valve (24) is closed, so that hydrogen no longer enters the radiation insulation layer (10), and the corresponding radiation insulation capacity is weakened; 3) When it is necessary to further increase the hydrogen supply, on the basis of the above operation, the second hydrogen valve (13) is continued to be opened and the carbon dioxide cooling valve (21) is closed, hydrogen no longer enters the carbon dioxide insulation layer (9), the solid carbon dioxide frozen in the carbon dioxide insulation layer (9) begins to vaporize, the vacuum is destroyed, and the thermal conductivity of the carbon dioxide insulation layer (9) increases; 4) When it is necessary to further increase the hydrogen supply, on the basis of the above operation, the first hydrogen valve (12) is continued to be opened and the methane cooling valve (18) is closed, hydrogen no longer enters the methane gas insulation layer (8), the solid methane frozen in the methane gas insulation layer (8) begins to vaporize, the vacuum is destroyed, and the thermal conductivity of the methane gas insulation layer (8) increases; 5) The above steps can be performed sequentially, in reverse order or simultaneously, depending on the hydrogen supply demand.

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