Liquid hydrogen storage equipment and liquid hydrogen conveying system

Abstract

The invention discloses liquid hydrogen storage equipment and a liquid hydrogen conveying system. The liquid hydrogen storage equipment comprises a liquid hydrogen jacket and a storage container which are arranged in a separated manner; the storage container comprises a storage inner wall and a storage outer wall, a liquid storage space is defined by the storage inner wall, the storage outer wall is annularly arranged on the storage inner wall, a storage heat insulation space is defined by the storage outer wall and the storage inner wall, and the storage heat insulation space comprises a heat insulation opening; the jacket inner wall defines a mounting space for mounting a liquid hydrogen pump, the jacket outer wall is annularly arranged on the outer side of the jacket inner wall and defines a jacket heat insulation space with the jacket inner wall, and the liquid hydrogen jacket seals and blocks the heat insulation opening so that the jacket heat insulation space and the storage heat insulation space can be independently arranged; the liquid hydrogen jacket further comprises a heat blocking part arranged on the inner wall of the jacket, the heat blocking part comprises a cooling medium pipeline, and a cooling medium is introduced into the cooling medium pipeline. According to the liquid hydrogen storage equipment and the liquid hydrogen conveying system, the maintenance time and cost of a heat insulation layer in the storage container are reduced, and the liquid leakage amount of liquid hydrogen is reduced.

Description

Technical Field

[0001] This application relates to the field of liquid hydrogen technology, and in particular to a liquid hydrogen storage device and a liquid hydrogen delivery system. Background Technology

[0002] Liquid hydrogen is more suitable for large-scale, long-distance transportation than gaseous hydrogen, and it is also better suited for storage in large hydrogen refueling stations. Liquid hydrogen has high storage density, low storage and transportation costs, low storage pressure, and is safer. The process flow of a liquid hydrogen storage-type hydrogen refueling station, in the order of logistics, generally consists of a liquid hydrogen storage tank, a liquid hydrogen pump, a high-pressure vaporizer, a high-pressure gaseous hydrogen buffer tank, and a hydrogen dispenser. The liquid hydrogen pump is installed in the liquid hydrogen storage tank.

[0003] Existing reciprocating liquid hydrogen pumps are divided into external and submersible types. External liquid hydrogen pumps are installed outside the liquid hydrogen storage tank and connected to it via pipelines to deliver liquid hydrogen. Submersible liquid hydrogen pumps have their hydraulic end, responsible for liquid hydrogen compression and delivery, installed inside the tank and submerged in liquid hydrogen, while the drive end is installed outside the tank. Submersible liquid hydrogen pumps significantly reduce total hydrogen evaporation loss and can be refilled on demand, making them ideal for cyclic operations requiring frequent start-ups and shutdowns within an hour.

[0004] Currently, the portion of the submersible liquid hydrogen pump installed inside the liquid hydrogen storage tank has an external jacketed insulation space to reduce heat leakage from the pump into the tank. Generally, liquid hydrogen storage tanks also have their own insulation space, which is connected to the jacketed insulation space for integrated vacuuming, maintenance, and monitoring. During the development of this invention, the inventors discovered that a failure in either the tank's insulation space or the jacketed insulation space necessitates repair of the entire tank's insulation space, resulting in lengthy and costly maintenance. Furthermore, heat leakage from the liquid hydrogen pump and its insulation jacket accounts for over 90% of the total liquid hydrogen heat leakage; therefore, the insulation performance of the liquid hydrogen pump and insulation jacket needs optimization to reduce heat loss from the liquid hydrogen. Summary of the Invention

[0005] The purpose of this application is to provide a liquid hydrogen storage device and a liquid hydrogen delivery system to reduce the maintenance time and cost of the insulation layer inside the storage tank and reduce the leakage of liquid hydrogen.

[0006] This application provides a liquid hydrogen storage device, comprising: a liquid hydrogen jacket and a storage container separated by partitions; the storage container includes an inner storage wall and an outer storage wall, the inner storage wall defining a liquid storage space, and the outer storage wall surrounding the inner storage wall and defining a storage insulation space, the storage insulation space including an insulation opening; the liquid hydrogen jacket includes an inner jacket wall and an outer jacket wall, the inner jacket wall defining an installation space for installing a liquid hydrogen pump, the outer jacket wall surrounding the outer side of the inner jacket wall and defining a jacket insulation space, the liquid hydrogen jacket sealingly blocking the insulation opening so that the jacket insulation space and the storage insulation space are independently configured; the liquid hydrogen jacket further includes a heat-blocking part disposed on the inner jacket wall, the heat-blocking part including a cooling medium pipe, the cooling medium pipe containing a cooling medium.

[0007] Optionally, an inner wall expansion joint is provided on the inner wall of the jacket between the inner wall of the storage and the outer wall of the storage, and the cooling medium pipe is located on the inner wall expansion joint.

[0008] Optionally, an outer wall expansion joint is provided on the portion of the outer wall of the jacket located between the inner wall of the storage container and the outer wall of the storage container, and / or on the portion of the outer wall of the jacket located outside the storage container, and the cooling medium pipe extends to the outer wall expansion joint.

[0009] Optionally, the cooling medium is liquid hydrogen, and the liquid hydrogen inlet pipe is connected to the outlet of the liquid hydrogen pump.

[0010] Optionally, the storage container is provided with at least two liquid hydrogen jackets, and the jacket insulation space of any liquid hydrogen jacket is independently set with respect to the storage insulation space.

[0011] Optionally, the liquid hydrogen jacket is sleeve-shaped, with the side of the outer wall of the jacket sealing the insulation opening, and the insulation space of the jacket located outside the liquid storage space.

[0012] Optionally, the liquid hydrogen jacket is sleeve-shaped, with the side of the outer wall of the jacket sealing the insulation opening, and the insulation space of the jacket extending into the liquid storage space.

[0013] Optionally, a connecting pipe is provided between the storage insulation space and the jacket insulation space, and a control valve is installed on the connecting pipe to control the opening or closing of the connecting pipe.

[0014] Optionally, the liquid hydrogen pump is provided with a liquid hydrogen pump flange on the portion outside the storage container, and the liquid hydrogen jacket is provided with a jacket flange on the portion outside the storage container, wherein the liquid hydrogen pump flange and the jacket flange are detachably connected.

[0015] Optionally, a jacketed bottom valve is provided at the bottom of the installation space, and the liquid hydrogen storage device further includes a liquid hydrogen pump; the liquid hydrogen pump is submerged and installed in the installation space; the jacketed bottom valve is used to control the connection or disconnection between the liquid hydrogen pump and the storage space.

[0016] This application also provides a liquid hydrogen transportation system, including a liquid hydrogen tanker and any of the liquid hydrogen storage devices described above; the storage container is a pump pool, and a liquid hydrogen storage tank is provided on the outside of the pump pool. A second liquid inlet is provided on the liquid hydrogen storage tank. The pump pool and the storage tank are controllably connected through a rigid pipe, and the second liquid inlet is detachably connected to the liquid hydrogen tanker through a second flexible hose.

[0017] The above technical solution has the following beneficial effects:

[0018] The liquid hydrogen storage equipment and liquid hydrogen delivery system provided in this application have a jacket insulation space that is isolated from the storage insulation space. The two are independent and do not affect each other, which helps to reduce the maintenance time and maintenance cost of the local insulation space in the storage container. The heat blocking part is provided on the inner wall of the jacket to block and absorb the heat flow conducted downward by the liquid hydrogen jacket, so that the temperature of the stainless steel plate located below the heat blocking part on the liquid hydrogen jacket is maintained within the temperature range required to maintain the liquid hydrogen state for a long time, thereby reducing the heat leakage caused by heat conduction on the wall of the liquid hydrogen jacket. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a heat-blocking part provided on an insulation jacket in one embodiment of this application;

[0020] Figure 2a This is a schematic diagram of the structure of a single inner wall expansion joint and a single cooling medium pipe in one embodiment of this application;

[0021] Figure 2b yes Figure 2a A sectional view;

[0022] Figure 2c This is a schematic diagram of the structure of a double inner wall expansion joint and a single cooling medium pipe in one embodiment of this application;

[0023] Figure 2d This is a schematic diagram of the structure of a double inner wall expansion joint and a single cooling medium pipe in one embodiment of this application;

[0024] Figure 2e This is a schematic diagram of the structure of the double inner wall expansion joint and the double cooling medium pipeline in one embodiment of this application;

[0025] Figure 2f This is a schematic diagram of a single inner wall expansion joint and dual cooling medium pipeline in one embodiment of this application;

[0026] Figure 2g This is a schematic diagram of the structure of a double inner wall expansion joint and double cooling medium pipes in one embodiment of this application, in which the cooling medium pipes are led out from the upper side.

[0027] Figure 2h This is a schematic diagram of the structure of a double inner wall expansion joint and a double cooling medium pipe in one embodiment of this application, in which the cooling medium pipe is led out vertically.

[0028] Figure 3 This is a partial cross-sectional view of the cooling screen in one embodiment of this application;

[0029] Figure 4 This is a schematic diagram of a structure in one embodiment of the present application, showing a cooling screen installed in the jacketed insulation space.

[0030] Figure 5 This is a schematic diagram of a structure in one embodiment of the present application, showing a cooling screen extending toward the outer wall of the jacket in the jacket insulation space.

[0031] Figure 6 This is a schematic diagram of the structure of a liquid hydrogen storage device in one embodiment of this application;

[0032] Figure 7 This is a schematic diagram of a liquid hydrogen storage device with two external wall expansion joints in one embodiment of this application;

[0033] Figure 8 This is a schematic diagram of a storage container with three liquid hydrogen jackets in one embodiment of this application.

[0034] Attached icon number

[0035] 1-Liquid hydrogen pump, 10-Liquid hydrogen pump flange;

[0036] 2-Storage container, 20-Inner wall of storage, 21-Outer wall of storage, 22-Insulation space of storage, 23-Liquid storage space;

[0037] 3-Liquid hydrogen jacket, 30-Installation space, 31-Jacket bottom valve, 32-Jacket inner wall, 33-Jacket outer wall, 34-Jacket insulation space, 35-Jacket flange;

[0038] 4-Inner wall expansion joint, 40-Outer wall expansion joint;

[0039] 5 - Thermal barrier section; 50 - Cooling medium pipeline;

[0040] 6-Insulation section, 60-Liquid hydrogen coil, 61-Cooling screen, 62-Extension section;

[0041] 7-Connecting pipe, 70-Control valve. Detailed Implementation

[0042] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0043] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0044] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0045] This application provides a liquid hydrogen storage device, including: a liquid hydrogen jacket 3 and a storage container 2 that are separated by partitions.

[0046] The storage container 2 includes an inner storage wall 20 and an outer storage wall 21. The outer storage wall 21 is arranged around the outside of the inner storage wall 20 and defines a storage insulation space 22 with the inner storage wall 20. The storage insulation space 22 is vacuum-sealed and includes an insulation opening.

[0047] The liquid hydrogen jacket 3 provides support and fixation for the liquid hydrogen pump 1 housed inside. The liquid hydrogen jacket 3 includes an inner wall 32 and an outer wall 33. The inner wall 32 defines an installation space 30 for mounting the liquid hydrogen pump 1. The outer wall 33 surrounds the inner wall 32 and, together with the inner wall 32, defines a jacket insulation space 34, which is vacuum-sealed. The outer wall 33 is welded to seal the insulation opening, thus separating the jacket insulation space 34 from the storage insulation space 22, making them relatively independent.

[0048] In this embodiment, the size of the storage container 2 can be flexibly set. When the liquid hydrogen storage capacity is large, the storage container 2 in this embodiment can be a small tank specifically for installing the liquid hydrogen pump 1, and the small tank is connected to the large tank storing liquid hydrogen. The liquid hydrogen jacket 3 is made of stainless steel plate that is resistant to low temperature and hydrogen corrosion, and its thickness and strength are designed and calculated according to the weight to be supported. The internal support components are made of high-strength, low-temperature resistant, and low-thermal-conductivity materials to ensure sufficient support strength.

[0049] Please refer to the following at the same time Figure 1 , Figures 4 to 6The jacketed insulation space 34 and the storage insulation space 22 are isolated from each other, and are independent and do not affect each other. This allows for separate vacuuming of the jacketed insulation space 34 and the storage insulation space 22, with a vacuum level exceeding 0.01 Pa. The separation of the jacketed insulation space 34 and the storage insulation space 22 has minimal impact on the overall insulation vacuum system of the storage container 2. If either the jacketed insulation space 34 or the storage insulation space 22 fails, only the faulty jacketed insulation space 34 or the storage insulation space 22 needs to be repaired before partial vacuuming can be performed. Repairing the entire insulation vacuum system of the storage container 2 is not required, resulting in lower repair time and costs.

[0050] The system also includes a heat-blocking part 5 disposed on the inner wall 32 of the jacket, the heat-blocking part 5 including a cooling medium pipe 50, and a cooling medium is introduced into the cooling medium pipe 50.

[0051] In this embodiment, the heat-blocking part 5 can be a heat exchange tube, heat exchange fins, or other structure disposed on the inner wall 32 of the jacket. Heat blocking is achieved through the heat exchange effect of the cooling medium. After the liquid hydrogen jacket 3 is installed on the storage container 2, the heat flow outside the storage container 2 on the liquid hydrogen jacket 3 is blocked and absorbed by the heat-blocking part 5 when it is conducted downwards along the wall of the stainless steel plate. This ensures that the temperature of the stainless steel plate below the heat-blocking part 5 on the liquid hydrogen jacket 3 is maintained within the temperature range required to maintain the liquid hydrogen state, reducing the heat leakage caused by heat conduction on the wall of the liquid hydrogen jacket 3.

[0052] The liquid hydrogen storage device provided in this application embodiment has a jacket insulation space 34 separated from the storage insulation space 22. The two are independent and do not affect each other, which helps to reduce the maintenance time and cost of the local insulation space in the storage container 2. The heat blocking part 5 is provided on the inner wall 32 of the jacket to block and absorb the heat flow conducted downward by the liquid hydrogen jacket 3, so that the temperature of the stainless steel plate located below the heat blocking part 5 on the liquid hydrogen jacket 3 is maintained within the temperature range required to maintain the liquid hydrogen state for a long time, thereby reducing the heat leakage caused by heat conduction on the wall of the liquid hydrogen jacket 3.

[0053] As an optional embodiment, an inner wall expansion joint 4 is provided on the portion of the inner wall 32 of the jacket located between the inner storage wall 20 and the outer storage wall 21, and the cooling medium pipe 50 is located on the inner wall expansion joint. Therefore, in this embodiment, the cooling medium pipe 50 can be welded and fixed to the inner wall expansion joint 4, such as... Figures 2a to 2hAs shown, the number of inner wall expansion joints 4 and / or cooling medium pipes 50 can be one, two, three, etc., and the inner wall expansion joints 4 can be welded and fixed in sections on opposite sides of the cooling medium pipes 50. As shown in 2c, the number of cooling medium pipes 50 is one, and the number of inner wall expansion joints 4 is two. The two inner wall expansion joints 4 are respectively set on both sides of the cooling medium pipes 50, effectively buffering the expansion and contraction of the hydrogen jacket 3.

[0054] Specifically, the inner wall expansion joint 4 can be made of metal, allowing the inner storage wall 20 and the outer storage wall 21 to float within a certain range, meeting the performance requirements of expansion and contraction at low temperatures, so as to protect the special mechanical properties of the double-walled storage container 2.

[0055] As an optional embodiment, an outer wall expansion joint 40 is provided on the portion of the outer wall 33 of the jacket located between the inner storage wall 20 and the outer storage wall 21, and / or on the portion of the outer wall 33 of the jacket located outside the storage container 2, and the cooling medium pipe 50 extends to the outer wall expansion joint 40. In this embodiment, the cooling medium pipe 50 is partially welded and fixed to the inner wall expansion joint 40 and partially welded and fixed to the outer wall expansion joint 40 to increase the heat-blocking effect. In this embodiment, the outer wall expansion joint 40 can be made of metal, allowing the inner storage wall 20 and the outer storage wall 21 to float within a certain range to protect the special mechanical properties of the double-walled storage container 2. The outer wall expansion joint 40 and the inner wall expansion joint 4 can be integrally formed, which is convenient for installation and stable and reliable.

[0056] Among them, the outer wall expansion joint 40 can be like Figure 6 As shown, the portion located only between the inner storage wall 20 and the outer storage wall 21 can also be as follows: Figure 7 As shown, the portion between the inner storage wall 20 and the outer storage wall 21, as well as the portion on the outer wall of the jacket located outside the storage container, are provided to increase the flexibility compensation effect.

[0057] As an optional embodiment, the cooling medium is liquid hydrogen, and the liquid hydrogen inlet pipe is connected to the outlet of the liquid hydrogen pump. The liquid hydrogen introduced into the cooling medium pipe 50 is taken from the outlet of the liquid hydrogen pump 1 and finally returns to the vaporizer for vaporization and pressurization. The flow rate of liquid hydrogen entering the cooling medium pipe 50 is regulated by a valve, eliminating the need for additional cooling medium and reducing the cooling cost of the heat-blocking section 5.

[0058] As an optional embodiment, the storage container 2 is provided with at least two liquid hydrogen jackets 3, and the jacket insulation space 34 of any liquid hydrogen jacket 3 is independently provided from the storage insulation space. Please refer to... Figure 8The presence of at least two liquid hydrogen jackets 3 (two, three, four, five, six, etc.) within the storage container 2 facilitates the mutual backup of multiple liquid hydrogen pumps 1 or the parallel operation of multiple liquid hydrogen pumps 1, increasing the total delivery capacity and allowing selection in various processes with different requirements.

[0059] As an optional embodiment, the liquid hydrogen jacket 3 is sleeve-shaped, with the side of the outer wall 33 of the jacket sealing the insulating opening, and the insulating space 34 of the jacket located outside the liquid storage space 23. Please refer to... Figure 8 In this embodiment of the application, for cases where the liquid hydrogen pump 1 does not need to extend to the bottom of the liquid storage space 23, the above-mentioned arrangement is beneficial to saving the production and installation costs of the liquid hydrogen jacket 3.

[0060] As an optional embodiment, the liquid hydrogen jacket 3 is sleeve-shaped, with the side of the outer wall 33 of the jacket sealing the insulating opening, and the insulating space 34 of the jacket extending into the liquid storage space 23. Please refer to... Figure 8 In this embodiment of the application, for cases where the liquid hydrogen pump 1 needs to extend to the bottom of the liquid storage space 23, the above-mentioned arrangement can further reduce the impact of the liquid hydrogen pump 1 on the liquid hydrogen in the liquid hydrogen storage space, while effectively pumping the liquid hydrogen at the bottom of the liquid storage space 23.

[0061] As an optional embodiment, a connecting pipe 7 is provided between the storage insulation space 22 and the jacket insulation space 34. A control valve 70 is installed on the connecting pipe 7, and the control valve 70 controls the opening or closing of the connecting pipe 7. In this embodiment, when the control valve 70 is closed, the connecting pipe 7 is closed, and the storage insulation space 22 and the jacket insulation space 34 are isolated; when the control valve 70 is open, the connecting pipe 7 connects the storage insulation space 22 and the jacket insulation space 34. The control valve 70 controls the connection or isolation between the storage insulation space 22 and the jacket insulation space 34, which allows the liquid hydrogen jacket 3 to be free of adsorbents for various gas molecules. When the liquid hydrogen jacket 3 needs to adsorb gas molecules, the control valve 70 is opened, and the adsorbent in the storage insulation space 22 adsorbs the various gas molecules that have volatilized.

[0062] As an optional embodiment, the portion of the liquid hydrogen pump 1 located outside the storage container 2 is provided with a liquid hydrogen pump flange 10, and the portion located outside the storage container 2 is provided with a jacket flange 35. The liquid hydrogen pump flange 10 and the jacket flange 35 are detachably connected. In this embodiment, the liquid hydrogen pump flange 10 and the jacket flange 35 are connected by bolts, allowing the liquid hydrogen pump 1 to be detachably installed inside the liquid hydrogen jacket 3, facilitating the disassembly or maintenance of the liquid hydrogen pump 1, and also serving a positioning function for the liquid hydrogen pump 1.

[0063] As an optional embodiment, the liquid hydrogen storage device further includes a liquid hydrogen pump 1 and a jacketed bottom valve 31 connected thereto; the liquid hydrogen pump 1 is submerged and installed in the storage container 2, and the jacketed bottom valve 31 is used to control the connection or disconnection between the liquid hydrogen pump 1 and the internal liquid storage space 23 of the storage container 2. Please refer to... Figure 1 , Figures 4 to 7 The liquid hydrogen pump 1 is submerged and installed inside the storage container 2. The hydraulic end (i.e., cold end) of the liquid hydrogen pump 1 is placed inside the storage container 2 for drawing liquid hydrogen, while the drive end is installed outside the storage container 2. In this embodiment, the jacketed bottom valve 31 is made of stainless steel plate resistant to low temperatures and hydrogen corrosion, and its thickness and strength are designed and calculated based on the weight to be supported. Figure 1 , Figures 4 to 7 As shown, the bottom of the inner wall 32 of the jacket is lower than the bottom of the outer wall 33 of the jacket, and the inner wall 32 of the jacket is fixed (welded, integrally formed, etc.) or detachably connected to the bottom valve 31 of the jacket below.

[0064] The jacket bottom valve 31 is used to control the connection or disconnection between the hydraulic end of the liquid hydrogen pump 1 and the internal liquid storage space 23 of the storage container 2. The space inside the inner wall 20 of the storage container is the liquid storage space 23, which is used to store liquid hydrogen.

[0065] In an optional embodiment of the jacketed bottom valve 31, the jacketed bottom valve 31 is provided with a valve plate and two elastic members supported on the lower sides of the valve plate opposite to each other. The pump body of the liquid hydrogen pump 1 is provided with a slidable push rod located above the valve plate. Controlling the push rod to abut against the valve plate and move it towards the elastic members pushes the valve plate open, thereby opening the jacketed bottom valve 31. After the jacketed bottom valve 31 is opened, liquid hydrogen located in the storage inner wall 20 of the storage container 2 enters the space defined by the jacketed inner wall 32 through the jacketed bottom valve 31, contacting the pump head of the liquid hydrogen pump 1. If the liquid hydrogen pump 1 is in operation, it can draw in liquid hydrogen, pressurize it, and discharge it from the pump outlet. Controlling the push rod to move in the opposite direction from the valve plate causes the valve plate to return to its original position and close under the restoring force of the elastic members, thus closing the jacketed bottom valve 31. After the jacketed bottom valve 31 is closed, the space inside the jacketed inner wall 32 is completely sealed and isolated from the space inside the liquid hydrogen storage container 2. At this point, the liquid hydrogen pump 1 can be disassembled or repaired without the liquid hydrogen in the storage container 2 leaking out of the liquid hydrogen jacket 3. It should be noted that after the liquid hydrogen pump 1 is removed from the liquid hydrogen jacket 3 or before it is installed in the liquid hydrogen jacket 3, a blind flange is installed on the jacket flange 35 to isolate the external environment from the liquid hydrogen jacket 3 and the internal space of the storage container 2.

[0066] This embodiment may also include a heat insulation part 6 located within the jacketed insulation space 34. The heat insulation part 6 may be a heat insulation material or a structure such as a heat exchange tube or heat exchange fins with heat exchange (heat conduction, radiation or convection) capability, which is disposed within the jacketed insulation space 34 to enhance the insulation effect of the jacketed insulation space 34, thereby reducing the heat leakage of the liquid hydrogen pump 1.

[0067] As an optional embodiment, the heat insulation part 6 includes a liquid hydrogen coil 60, which is disposed on the outer side of the inner wall 32 of the jacket, and liquid hydrogen flows into the liquid hydrogen coil 60. In this embodiment, the liquid hydrogen coil 60 can be arranged around the inner wall 32 of the jacket along its length towards the outer wall 33 of the jacket to block the heat flow from the liquid hydrogen pump 1, so that the liquid hydrogen in the storage container 2 is not affected by heat leakage and is maintained at the temperature required to maintain the liquid hydrogen state.

[0068] As an optional embodiment, the heat insulation part 6 further includes a cooling screen 61, which surrounds the outer side of the inner wall 32 of the jacket and defines a closed cooling screen space with the inner wall 32 of the jacket. The liquid hydrogen coil 60 is located within the cooling screen space. The liquid hydrogen pump 1 is made of stainless steel and is the main source of heat leakage. In this embodiment, the cooling screen 61 may have an additional wall layer between the inner wall 32 and the outer wall 33 of the jacket, such as... Figures 3 to 5 As shown, most of the heat leakage of the liquid hydrogen pump 1 is isolated between the inner wall 32 of the jacket and the cooling screen 61, and the liquid hydrogen coil 60 is confined within the cooling screen 61, so as to block the heat flow within the area between the inner wall 32 of the jacket and the cooling screen 61, thereby further improving the heat flow blocking effect.

[0069] As an optional embodiment, the cooling screen 61 extends to the portion of the inner wall 32 of the jacket located outside the storage container 2. Figure 4 As shown, the portion of the cooling screen 61 extending outside the storage container 2 can act as a heat blocker, while the portion located inside the storage container 2 can act as a heat insulator, effectively reducing heat leakage.

[0070] As an optional embodiment, the cooling screen 61 further includes an extension 62 extending toward the outer wall 33 of the jacket. Figure 5 As shown, the extension portion 62 can laterally expand the insulation space of the cooling screen 61, which is beneficial to further improve the heat insulation effect of the cooling screen 61. Specifically, the extension portion 62 can extend to abut against the outer wall 33 of the jacket, so as to form a lateral insulation space between the inner wall 32 and the outer wall 33 of the jacket, thereby improving the insulation effect.

[0071] Specifically, in the cooling medium pipe 50 of the heat-blocking section 5 and / or the liquid hydrogen coil 60 of the heat insulation section 6, a small portion of the liquid hydrogen, which serves to absorb heat, will vaporize after absorbing heat. Therefore, a two-phase flow will be formed in the cooling medium pipe 50 and / or the liquid hydrogen coil 60. Adjusting the liquid hydrogen inlet flow rate to maintain a suitable liquid phase flow rate at the outlet is sufficient to complete the heat absorption and cooling functions.

[0072] As an optional embodiment, the heat insulation part 6 further includes a heat insulation component filled within the jacketed heat insulation space 34. The heat insulation component includes radiating layers and spacer layers spaced apart along a direction parallel to the inner wall 32 of the jacket. In this embodiment, the jacketed heat insulation space 34 is composed of a highly efficient heat insulation structure consisting of multiple layers (e.g., 80 layers) of radiating layers wrapped parallel to the inner wall 32 and spacer layers with low thermal conductivity, arranged alternately. The radiating layer material can be aluminum foil, copper foil, or aluminum-coated polyester film, etc., and the spacer layer material can be glass fiber paper, plant fiber paper, nylon cloth, polyester film, etc., reducing radiation, solid heat conduction, and residual gas heat conduction in the jacketed heat insulation space 34 to extremely low levels. Several small holes are opened in the radiating layers and spacer layers to balance the interlayer pressure of the multiple radiating layers and spacer layers, ensuring that residual gas near the inner wall 32 of the jacket can be fully extracted. Alternatively, activated carbon paper can be used as a spacer to take advantage of its high adsorption performance at low temperatures, or palladium oxide hydrogen adsorbent can be placed in the radiation layer and spacer layer to adsorb the outgassing of the material in the jacket insulation space 34, and then molecular sieve adsorbent can be placed to adsorb moisture, so as to maintain the high vacuum in the jacket insulation space 34 for a relatively long time and achieve a better insulation effect.

[0073] This application also provides a liquid hydrogen transportation system, including a liquid hydrogen tanker and the liquid hydrogen storage device described in any of the above embodiments. When the liquid hydrogen storage capacity is large, the storage container 2 is used as a pump pool, with a liquid hydrogen pump 1 installed in the storage container 2. A liquid hydrogen storage tank for storing large quantities of liquid hydrogen is located on the outside of the storage container 2, and the liquid hydrogen storage tank is connected to the liquid hydrogen tanker. Specifically, the storage container 2 is a pump pool, and a liquid hydrogen storage tank is located on the outside of the pump pool. The liquid hydrogen storage tank has a second inlet. The pump pool and the storage tank are controllably connected via a rigid pipe and a control valve. The second inlet is detachably connected to the liquid hydrogen tanker via a second flexible hose. Pressure sensors and temperature sensors are installed inside the storage tank to monitor the state of the liquid hydrogen in real time.

[0074] In another embodiment of this application, the storage container 2 can be directly connected to the liquid hydrogen tanker. Specifically, the storage container 2 has a first liquid inlet, which is detachably connected to the liquid hydrogen tanker via a first flexible hose. Pressure and temperature sensors are installed inside the storage container 2 to monitor the state of the liquid hydrogen in real time.

[0075] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0076] The above are merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. A liquid hydrogen storage device, characterized in that, include: A partitioned liquid hydrogen jacket and storage container; The storage container includes an inner storage wall and an outer storage wall. The inner storage wall defines a liquid storage space, and the outer storage wall is arranged around the inner storage wall and defines a thermal insulation space. The thermal insulation space includes a thermal insulation opening. The liquid hydrogen jacket includes an inner wall and an outer wall. The inner wall defines an installation space for installing a liquid hydrogen pump. The outer wall is arranged around the outer side of the inner wall and defines a jacket insulation space together with the inner wall. The liquid hydrogen jacket is sealed at the insulation opening so that the jacket insulation space is independently set from the storage insulation space. The liquid hydrogen jacket also includes a heat-blocking section disposed on the inner wall of the jacket, the heat-blocking section including a cooling medium pipe, and a cooling medium is introduced into the cooling medium pipe.

2. The liquid hydrogen storage device according to claim 1, characterized in that, An inner wall expansion joint is provided on the inner wall of the jacket between the inner wall of the storage and the outer wall of the storage, and the cooling medium pipe is located on the inner wall expansion joint.

3. The liquid hydrogen storage device according to claim 2, characterized in that, An outer wall expansion joint is provided on the portion of the outer wall of the jacket located between the inner wall of the storage container and the outer wall of the storage container, and / or on the portion of the outer wall of the jacket located outside the storage container, and the cooling medium pipe extends to the outer wall expansion joint.

4. The liquid hydrogen storage device according to claim 1, characterized in that, The cooling medium is liquid hydrogen, and the liquid hydrogen inlet pipe is connected to the outlet of the liquid hydrogen pump.

5. The liquid hydrogen storage device according to any one of claims 1-4, characterized in that, The storage container is provided with at least two liquid hydrogen jackets, and the jacket insulation space of any liquid hydrogen jacket is independently set with respect to the storage insulation space.

6. The liquid hydrogen storage device according to claim 5, characterized in that, The liquid hydrogen jacket is sleeve-shaped, with the side of the outer wall of the jacket sealing the insulation opening, and the insulation space of the jacket located outside the liquid storage space.

7. The liquid hydrogen storage device according to claim 5, characterized in that, The liquid hydrogen jacket is sleeve-shaped, with the side of the outer wall of the jacket sealing the insulation opening, and the insulation space of the jacket extending into the liquid storage space.

8. The liquid hydrogen storage device according to any one of claims 1-4, characterized in that, A connecting pipe is provided between the storage insulation space and the jacket insulation space, and a control valve is installed on the connecting pipe to control the opening or closing of the connecting pipe.

9. The liquid hydrogen storage device according to any one of claims 1-4, characterized in that, The liquid hydrogen pump is provided with a liquid hydrogen pump flange on the portion outside the storage container, and the liquid hydrogen jacket is provided with a jacket flange on the portion outside the storage container. The liquid hydrogen pump flange and the jacket flange are detachably connected.

10. The liquid hydrogen storage device according to any one of claims 1-4, characterized in that, A jacketed bottom valve is provided at the bottom of the installation space, and the liquid hydrogen storage device also includes a liquid hydrogen pump; The liquid hydrogen pump is submerged and installed in the installation space; The jacketed bottom valve is used to control the connection or disconnection between the liquid hydrogen pump and the liquid storage space.

11. A liquid hydrogen delivery system, characterized in that, Includes liquid hydrogen tank trucks and liquid hydrogen storage devices as described in any one of claims 1-10; The storage container is a pump pool, and a liquid hydrogen storage tank is provided on the outside of the pump pool. The liquid hydrogen storage tank has a second liquid inlet. The pump pool and the storage tank are controllably connected through a rigid pipe. The second liquid inlet is detachably connected to the liquid hydrogen tank truck through a second flexible hose.

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