Heat exchange tube supporting grid, solid hydrogen storage heat exchanger and vehicle-mounted hydrogen storage system

Abstract

The invention relates to the field of hydrogen storage, in particular to a heat exchange tube supporting grid, a solid hydrogen storage heat exchanger and a vehicle-mounted hydrogen storage system.The hydrogen connecting tube penetrates through the axis of the supporting grid, and at least two circles of annular or regular polygon-shaped annular connecting plates are coaxially arranged on the supporting grid; positioning rings for fixing heat exchange tubes are uniformly arranged on each circle of annular connecting plates, and the annular connecting plates are connected and fixed through radial connecting plates which are arranged along the radial direction of the supporting grid; and the positioning rings on the supporting grid are symmetrically arranged up and down by taking the horizontal axis of the supporting grid as a boundary. The high-capacity solid hydrogen storage system can be used, support can be provided for multiple sets of heat exchange pipes at the same time during use, uniform heat exchange of solid hydrogen storage particles is achieved, the solid hydrogen storage particles freely flow, and meanwhile the overall weight of the hydrogen storage system is reduced to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen storage, and in particular to a heat exchange tube support grid, a solid-state hydrogen storage heat exchanger and a vehicle-mounted hydrogen storage system. Background Art

[0002] Compared with traditional fossil energy, hydrogen energy can be obtained from solar energy and is an important clean energy. Existing hydrogen storage and transportation technologies are divided into gaseous hydrogen storage (compressing hydrogen to about 200 atmospheres and placing it in a long tube for transportation), liquid hydrogen storage (cooling hydrogen to minus 253 degrees Celsius to become liquid before transportation) and solid hydrogen storage (using the physical and chemical adsorption of solid materials on hydrogen to store hydrogen in these materials). Compared with gaseous hydrogen storage and liquid hydrogen storage technology, solid hydrogen storage has the following advantages: storage and transportation at room temperature, high hydrogen efficiency, good safety, and environmental friendliness.

[0003] In order to realize solid-state hydrogen storage and transportation, the existing hydrogen storage system, as described in the announcement number "CN221684271U", includes a tank body filled with hydrogen storage material, an air guide pipe inserted in the tank body, and a U-shaped heat exchange tube arranged in the hydrogen storage material. After the air guide pipe guides air into the tank body, after the heat exchange medium is introduced into the U-shaped heat exchange tube, the heat exchange medium heats the hydrogen storage material in the tank body to increase its temperature, thereby absorbing and storing hydrogen; the U-shaped heat exchange tube of the above-mentioned hydrogen storage system is directly fixed to the tank body at both ends, and the tube body is suspended in the tank cavity to contact and exchange heat with the hydrogen storage material. This type of hydrogen storage system can be suitable for small-volume solid-state hydrogen storage. When the hydrogen storage demand increases and the hydrogen storage tank needs to be thickened and lengthened, a single U-shaped heat exchange tube cannot meet the heat exchange demand of the hydrogen storage tank. The U-shaped heat exchange tube needs to be increased and lengthened to adapt to the heat exchange demand of large-volume hydrogen storage tanks.

[0004] When the number of U-shaped heat exchange tubes increases and their length increases, the heat exchange tubes must be supported in the tank body to avoid breaking. In order to achieve synchronous support for multiple groups of long heat exchange tubes, the existing heat exchange support structure is as described in the announcement number "CN104949551B". Partitions are arranged at intervals along the length direction in the heat exchanger. By opening holes in the partitions, the tube body of the heat exchange tube passes through the holes of the partitions, and the heat exchange tubes are supported by the partitions. Although this structural form solves the support problem of the heat exchange tubes, it also brings new problems. That is, the hydrogen storage material in the tank body cannot flow freely due to the obstruction of the partitions. The existence of the partitions hinders the loading and unloading of the hydrogen storage materials, and the weight of the partitions themselves also increases the overall dead weight of the hydrogen storage system, increasing the transportation cost. As can be seen from the above, how to simultaneously solve the support problem of the heat exchange tubes, the fluidity problem of the hydrogen storage materials, the uniform heat exchange problem of the hydrogen storage materials, and the overall weight reduction problem of the hydrogen storage system is a research and development problem of large-capacity solid-state hydrogen storage systems, which needs to be solved urgently. Summary of the invention

[0005] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a heat exchange tube support grid, a solid-state hydrogen storage heat exchanger and a vehicle-mounted hydrogen storage system. The present invention can meet the use of a large-capacity solid-state hydrogen storage system. When in use, it can provide support for multiple groups of heat exchange tubes at the same time, so that the solid-state hydrogen storage particles can exchange heat evenly, and the overall weight of the hydrogen storage system can be reduced to the maximum extent while the solid-state hydrogen storage particles can flow freely.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A heat exchange tube support grid, a hydrogen connecting tube passes through the axis of the support grid, at least two circles of annular connecting plates in the shape of a circular ring or a regular polygon are coaxially arranged on the support grid, each circle of annular connecting plates is evenly provided with positioning rings for fixing the heat exchange tubes, and the annular connecting plates are connected and fixed by radial connecting plates arranged along the radial direction of the support grid; the positioning rings on the support grid are symmetrically arranged up and down with the horizontal axis of the support grid as the boundary.

[0008] As a further solution of the present invention: from the inside to the outside, the distance between the axis of the positioning ring on each ring connecting plate and the axis of the support grid is:

[0009]

[0010] …

[0011]

[0012] Wherein, R1 represents the distance between the axis center of the positioning ring on the first annular connecting plate and the axis center of the support grid;

[0013] R2 represents the distance between the axis of the positioning ring on the first annular connecting plate and the axis of the supporting grid;

[0014] R n－1 Indicates the distance between the axis of the positioning ring on the n-1th annular connecting plate and the axis of the supporting grid;

[0015] R n Indicates the distance between the axis of the positioning ring on the nth ring connecting plate and the axis of the supporting grid;

[0016] R represents the shell radius of the heat exchanger where the support grid is located;

[0017] n represents the number of circles of the annular connecting plate;

[0018] d represents the diameter of the hydrogen connecting pipe.

[0019] As a further solution of the present invention: the angle θn between two adjacent positioning rings on each annular connecting plate is:

[0020]

[0021] Wherein, θ represents the angle between the positioning ring of the nth annular connecting plate adjacent to the horizontal symmetry axis of the supporting grid and the horizontal symmetry axis of the supporting grid.

[0022] As a further solution of the present invention: four groups of radial connecting plates are provided in a cross-staggered arrangement, and each radial connecting plate is connected and fixed to the hydrogen connecting pipe.

[0023] A solid hydrogen storage heat exchanger, wherein a heat exchange tube support grid is arranged at intervals along the length direction in the shell of the heat exchanger, and the hydrogen storage cavity of the heat exchanger is filled with solid hydrogen storage particles; a pipe box is installed at the medium exchange end of the heat exchanger, and the pipe box and the shell of the heat exchanger are enclosed to form a medium cavity, and a partition is horizontally arranged in the medium cavity, and the partition divides the medium cavity into a medium inlet cavity and a medium outlet cavity, and the medium inlet pipe and the medium outlet pipe are respectively connected to the medium inlet cavity and the medium outlet cavity; a U-shaped tube for conveying the medium is supported by a positioning ring of the support grid, and the two ends of the tube mouth of the U-shaped tube are respectively connected to the medium inlet cavity and the medium outlet cavity.

[0024] As a further solution of the present invention: with the horizontal axis of the support grid as the boundary, the bodies of the U-shaped tubes are symmetrically arranged up and down.

[0025] As a further solution of the present invention: after the hydrogen connecting pipe passes through the shell of the heat exchanger, it extends axially into the shell of the heat exchanger to transport or export hydrogen into the shell. The support grids are connected and fixed by tie rods, and the tie rods are arranged parallel to the axis of the heat exchanger shell.

[0026] As a further solution of the present invention: the outer layer of the heat exchanger shell and the tube box is provided with an insulation layer, and the insulation layer material is at least one of rock wool, glass wool or aluminum silicate.

[0027] As a further solution of the present invention: an injection port and a discharge port for solid hydrogen storage particles are provided on the shell of the heat exchanger, and the injection port and the discharge port are symmetrically arranged up and down.

[0028] A vehicle-mounted hydrogen storage system comprises a fixed frame arranged on a vehicle body, the fixed frame being divided into installation areas arranged in a rectangular array, a solid-state hydrogen storage heat exchanger being installed in the installation area of ​​the fixed frame, the installation area of ​​the fixed frame being divided into a fixed area and a sliding area along the length direction of the fixed frame, a pipe box of the heat exchanger being fixed in the fixed area by a bolt fixing seat, a shell of the heat exchanger being arranged in the sliding area, and slidingly cooperating with the sliding area along the length direction of the fixed frame through the sliding seat.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention designs the support grid of the heat exchange tube to be a mesh structure, and uses the radial connecting plate as a skeleton to support the main body of the support grid. Positioning rings are evenly arranged on multiple circles of reversing connecting plates, so that the positioning rings are used as connecting nodes for the tube body of the heat exchange tube to pass through, and the heat exchange tube is supported by the mesh design. The gaps between the annular connecting plates and the radial connecting plates can allow solid hydrogen storage particles to pass freely, and multiple groups of heat exchange tubes can perform uniform heat exchange on the solid hydrogen storage particles. At the same time, the support grid with a mesh design has an extremely light weight, which greatly reduces the additional weight of the hydrogen storage system.

[0031] 2. The present invention obtains the reasonable position of each circle of positioning rings on the support grid by calculation, so that the support grid maintains a balance between the best support effect, the best heat exchange effect and the maximum fluidity, which can achieve a more uniform heat exchange between the solid hydrogen storage particles and the heat exchange tube fluid, greatly reduce the heat exchange dead zone, and avoid the problem of low hydrogen absorption / desorption rate caused by uneven distribution.

[0032] 3. The present invention forms multi-stage support for heat exchange tubes of different lengths by arranging support grids at intervals in the heat exchanger. Each heat exchange tube is designed to be U-shaped, and its inlet is connected to the medium inlet cavity of the tube box, and its outlet is connected to the medium outlet cavity of the tube box. The medium inlet pipe and the medium outlet pipe can simultaneously input or output heat medium for each U-shaped tube, so that the heat in the heat exchanger is balanced.

[0033] 4. The present invention arranges the heat exchanger in a rectangular array on a fixed frame so that it can be directly installed on a mobile tank truck. The design of the fixed area and the sliding area on the fixed frame installation area takes into account the radial expansion deformation of the equipment at high temperature when heated, and also takes into account the axial tensile deformation of the equipment at high temperature when heated. It can be applied to the hydrogen absorption and desorption process under high temperature conditions. Since the overall equipment is light in weight and small in size, according to the mobile tank truck standard, one tank truck can be assembled with multiple devices. The modular design facilitates assembly and maintenance, and regular replacement of hydrogen storage particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the heat exchanger in the present invention.

[0035] Figure 2 It is a schematic structural diagram of the support grid in the present invention.

[0036] Figure 3 It is a structural schematic diagram of the vehicle-mounted hydrogen storage system in the present invention.

[0037] Figure 4 for Figure 3 Schematic diagram of the structure of the fixed end of the middle frame.

[0038] Figure 5 for Figure 3 Schematic diagram of the structure of the sliding end of the middle frame.

[0039] Figure 6 This is the temperature field distribution diagram in the present invention.

[0040] In the figure:

[0041] 1. heat exchanger; 11. U-shaped tube; 12. support grid;

[0042] 121. Positioning ring; 122. Annular connecting plate; 123. Radial connecting plate;

[0043] 13. Pull rod; 14. Hydrogen connecting pipe; 15. Hydrogen storage chamber;

[0044] 16. pipe box; 161. partition; 162. medium inlet pipe; 163. medium outlet pipe;

[0045] 2. Fixed frame; 21. Fixed area; 211. Bolt fixing seat;

[0046] 22. Sliding area; 221. Sliding seat. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figures 1 to 6 In an embodiment of the present invention, a heat exchange tube support grid, a solid-state hydrogen storage heat exchanger and a vehicle-mounted hydrogen storage system are provided. A fixed frame 2 arranged along the moving direction of the vehicle body is provided on the vehicle body. The frame structure of the fixed frame 2 is divided into installation areas arranged in a rectangular array. The installation channels of the installation areas are arranged along the length direction of the fixed frame 2, and the heat exchanger 1 is inserted and fixed.

[0049] The installation area of ​​the fixing frame 2 is divided into a shorter fixing area 21 and a longer sliding area 22 . The pipe box 16 of the heat exchanger 1 is arranged in the fixing area 21 , and the shell part of the heat exchanger 1 is arranged in the sliding area 22 .

[0050] In this embodiment, the installation area is divided into nine groups, which are arranged in a 3×3 layout. Two groups of fixed areas 21 and two groups of sliding areas 22 are arranged in each installation area. The two groups of fixed areas 21 are located outside the installation area. Bolt fixing seats 211 are arranged at the four corner ends of the fixed area 21, and are bolted to the pipe box 16 of the heat exchanger 1 through the bolt fixing seats 211; sliding seats 221 are arranged at the four corner ends of the sliding area 22. Since the shell part of the heat exchanger 1 is installed in the sliding area 22, the sliding seat 221 is annular, and its radius is greater than the shell radius of the heat exchanger 1, so that there is a gap between the sliding seat 221 and the shell part of the heat exchanger 1, which is used to adapt to the radial expansion and deformation of the heat exchanger 1 at high temperature, and under high temperature, the shell of the heat exchanger 1 can be axially deformed along the sliding seat 221.

[0051] The shell of the heat exchanger 1 is cylindrical, one end of which is the medium exchange end, and the medium exchange end is evenly opened for the pipe opening of the heat exchange tube to pass through. A pipe box 16 is fixed outside the medium exchange end of the heat exchanger. The pipe box 16 and the shell of the heat exchanger 1 are enclosed to form a medium cavity. A partition 161 is horizontally arranged in the medium cavity. The partition 161 evenly divides the medium cavity from top to bottom. The upper space of the medium cavity is the medium outlet cavity, and the lower space of the medium cavity is the medium inlet cavity. A medium inlet pipe 162 is installed on the pipe box 16, which is connected to the medium inlet cavity through the medium inlet pipe 162. A medium outlet pipe 163 is also installed on the pipe box 16, which is connected to the medium outlet cavity through the medium outlet pipe 163.

[0052] The heat exchange tube is preferably a U-shaped tube 11, which is arranged in the shell of the heat exchanger 1, with its inlet communicating with the medium inlet cavity, and its outlet communicating with the medium outlet cavity, and its tube body is arranged symmetrically up and down about the partition 161. The space in the shell of the heat exchanger 1 except the U-shaped tube 11 is used as a hydrogen storage chamber 15 for storing solid hydrogen storage particles. The top and bottom of the heat exchanger 1 are provided with an injection port and a discharge port, which are arranged 180 degrees apart in phase, and the solid hydrogen storage particles enter and exit the heat exchanger 1 from the injection port and the discharge port.

[0053] The outer layer of the shell of the heat exchanger 1 and the pipe box 16 are both provided with an insulation layer, and the material of the insulation layer can be one of rock wool, glass wool or aluminum silicate insulation materials, or a combination of the above insulation materials. In the hydrogen storage chamber 15 of the heat exchanger 1, support grids 12 are evenly spaced along the axial direction of the heat exchanger. The support grids 12 are used to support each U-shaped tube 11. The hydrogen connecting pipe 14 passes through the shell of the heat exchanger 1 and then passes through the axis of the support grid 12 along the axial direction of the heat exchanger 1. The pipe mouth of the hydrogen connecting pipe 14 extends to the end of the hydrogen storage chamber 15 away from the pipe box 16. A hemispherical head is provided at the end of the shell of the heat exchanger 1 away from the pipe box 16. The outer shell of the heat exchanger 1 is made of stainless steel or alloy steel. The part of the hydrogen connecting pipe 14 in contact with the solid hydrogen storage particles is evenly opened with small holes in the axial and radial directions to facilitate the full absorption and release of hydrogen.

[0054] The support grids 12 are connected and fixed by tie rods 13 . Preferably, four groups of tie rods 13 are provided at four corner ends of the support grids 12 . Each tie rod 13 is arranged in parallel with the hydrogen connecting pipe 14 .

[0055] The support grid 12 includes four groups of radial connecting plates 123 arranged radially along the shell of the heat exchanger 1. The radial connecting plates 123 are arranged in a cross-staggered manner, and their ends are connected and fixed to the hydrogen connecting pipe 14. From the axis of the support grid 12 to the outside, multiple circles of annular connecting plates 122 are fixed on each radial connecting plate 123. The annular connecting plates 122 can be set to a circular ring shape or a regular polygonal shape. The annular connecting plates 122 and the radial connecting plates 123 are both composed of steel bars or thin steel plates. Each thin steel plate is preferably welded and fixed, so that the support grid 12 has a spider web structure, and the mesh gaps of the spider web structure can allow solid hydrogen storage particles to pass through.

[0056] In this embodiment, the annular connecting plate 122 is preferably a regular polygon with an even number of sides. Each bending section of the regular polygon serves as an installation node, and is equipped with a positioning ring 121, which corresponds to the diameter of the U-shaped tube 11 and is used to support and position the U-shaped tube 11; the positioning rings 121 on the support grid 12 are arranged symmetrically up and down with the horizontal symmetry axis of the support grid 12 as the boundary.

[0057] From inside to outside, the distance between the axis of the positioning ring 121 on each ring connecting plate 122 and the axis of the support grid 12 is:

[0058]

[0059]

[0060] …

[0061]

[0062] Wherein, R1 represents the distance between the axis center of the positioning ring 121 on the first annular connecting plate 122 and the axis center of the support grid 12;

[0063] R2 represents the distance between the axis of the positioning ring 121 on the first annular connecting plate 122 and the axis of the support grid 12;

[0064] R n－1 Indicates the distance between the axis of the positioning ring 121 on the n-1th annular connecting plate 122 and the axis of the supporting grid 12;

[0065] R n represents the distance between the axis of the positioning ring 121 on the nth annular connecting plate 122 and the axis of the supporting grid 12;

[0066] R represents the shell radius of the heat exchanger where the support grid 12 is located;

[0067] n represents the number of circles of the annular connecting plate 122;

[0068] d represents the diameter of the hydrogen connecting pipe 14 .

[0069] The angle θn between two adjacent positioning rings 121 on each annular connecting plate 122 is:

[0070]

[0071] Here, θ represents the angle between the positioning ring 121 of the n-th annular connecting plate 122 adjacent to the horizontal symmetry axis of the support grid 12 and the horizontal symmetry axis of the support grid 12 .

[0072] When the heat exchanger 1 is working, a heat source is injected into the pipe box 16 through the medium inlet pipe 162, and the heat source is preferably heat transfer oil. The heat source enters each U-shaped tube 11 from the medium inlet cavity of the pipe box 16, and the heat source releases heat when passing through the U-shaped tube 11, and the solid hydrogen storage particles in the heat exchanger 1 absorb heat. When the hydrogen storage particles reach the first set temperature, they absorb the hydrogen introduced from the hydrogen connecting pipe 14. When the hydrogen absorption amount reaches the standard, hydrogenation is stopped, and the hydrogen is stored in the solid hydrogen storage particles. After the heat exchanger 1 is transported to the designated location, a heat source is injected into the pipe box 16 through the medium inlet pipe 162, and the heat source releases heat when passing through the U-shaped tube 11. The solid hydrogen storage particles in the heat exchanger 1 absorb heat. When the hydrogen storage particles are heated to the second set temperature, the stored hydrogen is released, and the hydrogen is discharged from the hydrogen connecting pipe 14 to the outside and transported to the designated user.

[0073] Due to the edge effect, the solid particles near the inner wall of the heat exchanger shell are heated unevenly, which will seriously affect the hydrogen absorption and desorption rate. After the support structure of the present invention is introduced, Figure 6 As shown, the temperature distribution inside the heat exchanger is uniform, and its temperature uniformity coefficient is as low as 0.06.

[0074] As shown in Table 1 below, the mesh support structure of the present invention can support hundreds of kilograms of heat exchange tubes under different working conditions, and the support is stable.

[0075] Table 1

[0076]

[0077] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0078] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

Claims

1. A heat exchange tube support grid, characterized in that: The hydrogen connection pipe (14) passes through the axis of the support grid (12). At least two annular or regular polygonal annular connection plates (122) are coaxially arranged on the support grid (12). Positioning rings (121) for fixing the heat exchange tubes are evenly arranged on each annular connection plate (122). The annular connection plates (122) are connected and fixed by radial connection plates (123) arranged radially along the support grid (12). The positioning rings (121) on the support grid (12) are arranged symmetrically up and down with the horizontal axis of the support grid (12) as the boundary.

2. A heat exchange tube support grid according to claim 1, characterized in that: From inside to outside, the distance between the axis of the positioning ring (121) on each ring connecting plate (122) and the axis of the support grid (12) is: Wherein, R1 represents the distance between the axis center of the positioning ring (121) on the first annular connecting plate (122) and the axis center of the support grid (12); R2 represents the distance between the axis center of the positioning ring (121) on the first annular connecting plate (122) and the axis center of the support grid (12); R n－1 Indicates the distance between the axis center of the positioning ring (121) on the n-1th annular connecting plate (122) and the axis center of the support grid (12); R n Indicates the distance between the axis center of the positioning ring (121) on the nth annular connecting plate (122) and the axis center of the support grid (12); R represents the shell radius of the heat exchanger where the support grid (12) is located; n represents the number of circles of the annular connecting plate (122); d represents the diameter of the hydrogen connecting pipe (14).

3. A heat exchange tube support grid according to claim 2, characterized in that: The included angle θn between two adjacent positioning rings (121) on each annular connecting plate (122) is: Wherein, θ represents the angle between the positioning ring (121) of the nth annular connecting plate (122) adjacent to the horizontal symmetry axis of the support grid (12) and the horizontal symmetry axis of the support grid (12).

4. The heat exchange tube support grid according to claim 1, characterized in that: Four groups of radial connecting plates (123) are provided and arranged in a cross-staggered manner, and each radial connecting plate (123) is connected and fixed to the hydrogen connecting pipe (14).

5. A solid-state hydrogen storage heat exchanger, characterized in that: A heat exchange tube support grid as claimed in any one of claims 1 to 4 is arranged at intervals in the shell of the heat exchanger (1) along the length direction, and the hydrogen storage cavity (15) of the heat exchanger (1) is filled with solid hydrogen storage particles; a pipe box (16) is installed at the medium exchange end of the heat exchanger (1), and the pipe box (16) and the shell of the heat exchanger (1) are enclosed to form a medium cavity, and a partition (161) is horizontally arranged in the medium cavity, and the partition (161) divides the medium cavity into a medium inlet cavity and a medium outlet cavity, and the medium inlet pipe (162) and the medium outlet pipe (163) are respectively connected to the medium inlet cavity and the medium outlet cavity; a U-shaped tube (11) for conveying the medium is supported by a positioning ring (121) of the support grid (12), and the two ends of the tube mouth of the U-shaped tube (11) are respectively connected to the medium inlet cavity and the medium outlet cavity.

6. A solid-state hydrogen storage heat exchanger according to claim 5, characterized in that: With the horizontal axis of the support grid (12) as the boundary, the bodies of the U-shaped tubes (11) are symmetrically arranged up and down.

7. A solid-state hydrogen storage heat exchanger according to claim 5, characterized in that: After passing through the shell of the heat exchanger (1), the hydrogen connecting pipe (14) extends axially into the shell of the heat exchanger (1) to transport or discharge hydrogen into the shell. The support grids (12) are connected and fixed by tie rods (13), and the tie rods (13) are arranged parallel to the axis of the shell of the heat exchanger (1).

8. The solid-state hydrogen storage heat exchanger according to claim 5, characterized in that: The outer layers of the shell of the heat exchanger (1) and the pipe box (16) are provided with a thermal insulation layer, and the thermal insulation layer material is at least one of rock wool, glass wool or aluminum silicate.

9. A solid-state hydrogen storage heat exchanger according to claim 5, characterized in that: The shell of the heat exchanger (1) is provided with an injection port and a discharge port for solid hydrogen storage particles, and the injection port and the discharge port are symmetrically arranged up and down.

10. A vehicle-mounted hydrogen storage system, characterized in that: The invention comprises a fixed frame (2) arranged on a vehicle body, the fixed frame (2) being divided into installation areas arranged in a rectangular array, a solid-state hydrogen storage heat exchanger as claimed in claim 5 being installed in the installation area of ​​the fixed frame (2), and the installation area of ​​the fixed frame (2) being divided into a fixed area (21) and a sliding area (22) along the length direction of the fixed frame (2), a pipe box (16) of the heat exchanger (1) being fixed in the fixed area (21) by a bolt fixing seat (211), and a shell of the heat exchanger (1) being arranged in the sliding area (22), and slidingly cooperating with the sliding area (22) along the length direction of the fixed frame (2) through a sliding seat (221).

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