A vertical liquid hydrogen storage tank

Abstract

The utility model discloses a vertical liquid hydrogen storage tank to solve the problem of large heat leakage, poor anti-seismic performance and the like of the vertical liquid hydrogen storage tank equipment support structure in the prior art. It comprises an outer tank and an inner tank, the inner tank is supported in the cavity of the outer tank through a support assembly and a top support assembly, and an insulating layer is arranged between the inner tank and the outer tank. The support assembly comprises a bottom support assembly, a horizontal pull rod assembly and a vertical pull rod assembly, and an outer tank support assembly is further arranged at the lower part of the outer tank. The utility model can reliably support the inner tank while reducing the heat leakage of the support structure, and the anti-seismic performance of the inner tank is improved.

Description

Technical Field

[0001] This utility model belongs to the field of liquid hydrogen storage, and specifically relates to a vertical liquid hydrogen storage tank. Background Technology

[0002] Hydrogen, as an excellent energy carrier, boasts advantages such as high efficiency, cleanliness, zero pollution, and sustainability, making it one of the most promising clean energy sources today. Key technologies for hydrogen energy utilization include hydrogen production, storage, transportation, and application, with hydrogen storage being a crucial link in the hydrogen energy industry chain. Currently, hydrogen transportation and storage primarily rely on high-pressure gaseous hydrogen. Compared to gaseous hydrogen storage, liquid hydrogen storage offers advantages such as higher purity, lower long-distance transportation costs, and higher refueling efficiency.

[0003] Liquid hydrogen is a colorless, odorless, and transparent liquid with a boiling point of -252.8℃ at standard atmospheric pressure and a density of 70.79 kg / m³. 3 At room temperature and pressure, the density of liquid hydrogen is 845 times higher than that of gaseous hydrogen. Hydrogen is difficult to liquefy due to its low latent heat of vaporization. Currently, there are three main hydrogen liquefaction processes in use: the pre-cooled Linde-Hampson process, the Kraut process, and the helium-cooled liquefaction process. Large-scale hydrogen liquefaction plants primarily employ the pre-cooled Kraut process.

[0004] Liquid hydrogen storage requires cryogenic liquid storage containers with excellent thermal insulation. Based on their usage, liquid hydrogen storage tanks can be categorized into stationary, mobile, and containerized tank types. Stationary liquid hydrogen storage tanks generally include two main categories: cylindrical tanks (vertical and horizontal) and spherical tanks. Vertical cylindrical liquid hydrogen storage tanks are needed in locations such as hydrogen refueling stations, but their high seismic resistance and low evaporation rate are currently the main technical challenges.

[0005] Chinese patent CN 221076127U discloses a vertical cryogenic storage tank for storing cryogenic liquefied gases. This utility model uses a bottom support structure to support the inner tank, and at the same time restricts the relative movement between the inner container and the outer shell through elastic support members. However, this structure concentrates all the support of the inner tank on the bottom end, resulting in a relatively large stress concentration; at the same time, the elastic support members are located at the bottom of the container, which cannot effectively increase the shock resistance of the inner container.

[0006] Chinese patent CN 118031098A discloses a double-layered vertical cryogenic storage tank. When the entire tank is transported or moved, the liquid nitrogen stored inside the upper and lower tanks inevitably sloshes. Storing the liquid nitrogen in layers reduces the range of fluctuations and effectively prevents a large amount of liquid nitrogen from simultaneously impacting a specific location on the inner wall of the tank, thus dispersing the impact force. The main problem this invention solves is the damage to the inner wall of the storage tank caused by liquid nitrogen sloshing, and it is primarily used for storage during liquid nitrogen transportation.

[0007] Chinese patent CN217951948U discloses an insulating support structure for a double-layer vertical liquid hydrogen container. The novel inner tank is supported by a skirt at the bottom and has an annular limiting component at the top. However, this structure can only restrict the movement of the inner container in the horizontal direction and cannot restrict the rotation of the inner container around the axis. Utility Model Content

[0008] The purpose of this invention is to provide a vertical liquid hydrogen storage tank to solve the problems of large heat leakage and poor seismic performance of the support structure of existing vertical liquid hydrogen storage tank equipment.

[0009] To achieve the above objectives, the technical solution of this utility model is as follows:

[0010] A vertical liquid hydrogen storage tank includes an outer tank and an inner tank, characterized in that: the inner tank is supported in the cavity of the outer tank by a support assembly and a top support assembly, and an insulation layer is formed between the inner tank and the outer tank; the support assembly includes a bottom support assembly, a horizontal tie rod assembly and a vertical tie rod assembly; and an outer tank support assembly is also provided at the lower part of the outer tank.

[0011] Preferably, the bottom support assembly includes an upper sleeve, a cold insulation block, and a lower sleeve. The upper sleeve is connected to the outer side of the bottom end cap of the inner tank, and the lower sleeve is connected to the inner side of the bottom end cap of the outer tank. The space between the upper sleeve and the lower sleeve is filled with a cold insulation block.

[0012] Preferably, the vertical tie rod assembly includes a third connecting plate, a vertical tie rod, a fourth connecting plate, and a vertical tie rod insulation pad. The third connecting plate is connected to the inner side of the outer tank. One end of the vertical tie rod is connected to the third connecting plate, and the other end is connected to the fourth connecting plate. The fourth connecting plate is connected to the outer side of the inner tank. Vertical tie rod insulation pads are provided between the vertical tie rod and the third connecting plate, and between the vertical tie rod and the fourth connecting plate.

[0013] Preferably, the vertical tie rod assembly is typically arranged in 6 to 12 units at a uniform circumferential angle, with an inclination angle α of 70° to 80°, according to calculation requirements.

[0014] Preferably, the horizontal tie rod assembly includes a first connecting plate, a horizontal tie rod, a second connecting plate, and a horizontal tie rod insulation pad. The first connecting plate is connected to the inner side of the outer tank. One end of the horizontal tie rod is connected to the first connecting plate, and the other end is connected to the second connecting plate. The second connecting plate is connected to the outer side of the inner tank. Horizontal tie rod insulation pads are provided between the horizontal tie rod and the first connecting plate, and between the horizontal tie rod and the second connecting plate.

[0015] Preferably, the horizontal tie rod assembly is arranged horizontally, mainly used to increase the seismic resistance of the inner tank and limit the rotation of the inner tank, and 4 to 8 are evenly arranged along the circumference.

[0016] Preferably, the top support assembly is mainly composed of steel plate ribs, which are used to restrict the axial movement of the inner tank. Four to eight ribs are evenly arranged in the circumferential direction, and the steel plate ribs are arranged at an inclined angle β of 20° to 30°.

[0017] Preferably, the outer tank support assembly can be supported by a skirt or legs as needed.

[0018] The advantages of this utility model compared with the prior art are as follows:

[0019] (1) The vertical liquid hydrogen storage tank of this utility model is supported on the foundation by the outer tank, and the overall support is reliable.

[0020] (2) The inner tank of the vertical liquid hydrogen storage tank of this utility model is supported inside the outer tank by the vertical tie rod assembly and the bottom support assembly, and is equipped with a cold insulation pad, which can provide reliable support for the inner tank while reducing the heat leakage of the support structure.

[0021] (3) The vertical liquid hydrogen storage tank of this utility model is provided with a horizontal tie rod assembly on the inner tank body, which can absorb the displacement caused by the thermal expansion of the inner tank and at the same time provide the inner tank with shock resistance.

[0022] (4) The upper part of the inner tank of the vertical liquid hydrogen storage tank of this utility model is provided with a top support component. The top support component is mainly composed of steel plate tie rods, which can restrict the axial movement of the inner tank.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of the present invention. Attached Figure Description

[0024] Figure 1 This is a front view of a vertical liquid hydrogen storage tank according to the present invention;

[0025] Figure 2 for Figure 1 AA view;

[0026] Figure 3 for Figure 1 BB view;

[0027] Figure 4 for Figure 1 CC view;

[0028] Figure 5 This is a detailed drawing of the horizontal tie rod assembly of a vertical liquid hydrogen storage tank according to this utility model;

[0029] Figure 6 This is a detailed drawing of the vertical tie rod assembly of a vertical liquid hydrogen storage tank according to this utility model;

[0030] Figure 7This is a detailed drawing of the bottom support assembly of a vertical liquid hydrogen storage tank according to the present invention.

[0031] The reference numerals shown in the attached figures are:

[0032] 1. Outer tank; 2. Inner tank; 3. Outer tank support assembly; 4. Bottom support assembly; 5. Horizontal tie rod assembly; 6. Vertical tie rod assembly; 7. Insulation layer; 8. Top support assembly; 401. Upper sleeve; 402. Cold insulation block; 403. Lower sleeve; 501. First connecting plate; 502. Horizontal tie rod; 503. Second connecting plate; 504. Horizontal tie rod cold insulation pad; 601. Third connecting plate; 602. Vertical tie rod; 603. Fourth connecting plate; 604. Vertical tie rod cold insulation pad. Detailed Implementation

[0033] like Figure 1 As shown, a vertical liquid hydrogen storage tank includes an outer tank 1 and an inner tank 2. The inner tank 2 is supported in the cavity of the outer tank 1 by a support assembly and a top support assembly 8. An insulation layer 7 is located between the inner tank 2 and the outer tank 1. The support assembly includes a bottom support assembly 4, a horizontal tie rod assembly 5, and a vertical tie rod assembly 6. An outer tank support assembly 3 is provided at the lower part of the outer tank 1 to support the entire vertical liquid hydrogen storage tank.

[0034] like Figure 1 As shown, insulation material is stacked between the inner tank 2 and the outer tank 1. After the insulation material is stacked, a vacuum is drawn to form an insulation layer 7, which provides insulation protection for the inner tank 2. Generally, insulation materials include aluminum foil, powder, fiber, glass microspheres, etc.

[0035] like Figures 1-7 As shown, the bottom support assembly 4 includes an upper sleeve 401, a cold insulation block 402, and a lower sleeve 403. The upper sleeve 401 is welded to the bottom end cap of the inner tank 2, and the lower sleeve 403 is welded to the bottom end cap of the outer tank 1. The space between the upper sleeve 401 and the lower sleeve 403 is filled with the cold insulation block 402. The cold insulation block 402 is usually required to have both good thermal insulation and mechanical properties, and fiberglass can generally be used. The bottom support assembly 4 assists in supporting the weight of the inner tank 2, the weight of the medium, and the weight of the accessories.

[0036] The vertical tie rod assembly 6 includes a third connecting plate 601, a vertical tie rod 602, a fourth connecting plate 603, and a vertical tie rod insulation pad 604. The third connecting plate 601 is welded to the inner side of the outer tank 1 and connected to one end of the vertical tie rod 602 by bolts, allowing free rotation. The other end of the vertical tie rod 602 is bolted to the fourth connecting plate 603, allowing free rotation. The fourth connecting plate 603 is welded to the outer side of the inner tank 2. Vertical tie rod insulation pads 604 are provided between the vertical tie rod 602 and the third connecting plate 601, and between the vertical tie rod 602 and the fourth connecting plate 603. The vertical tie rod assembly 6 serves as the main load-bearing component of the inner tank 2, primarily bearing the weight of the inner tank 2, the medium, and its accessories. The vertical tie rod assembly 6 is typically arranged in 6 to 12 units, uniformly inclined in the circumferential direction, with an inclination angle α of 70° to 80°, according to calculation requirements.

[0037] The horizontal tie rod assembly 5 includes a first connecting plate 501, a horizontal tie rod 502, a second connecting plate 503, and a horizontal tie rod insulation pad 504. The first connecting plate 501 is welded to the inner side of the outer tank 1 and connected to one end of the horizontal tie rod 502 by bolts, allowing free rotation. The other end of the horizontal tie rod 502 is bolted to the second connecting plate 503, allowing free rotation. The second connecting plate 503 is welded to the outer side of the inner tank 2. Horizontal tie rod insulation pads 504 are provided between the horizontal tie rod 502 and the first connecting plate 501, and between the horizontal tie rod 502 and the second connecting plate 503. The horizontal tie rod assembly 5 is arranged horizontally and is mainly used to increase the seismic resistance of the inner tank 2 and limit the rotation of the inner tank 2. Four to eight assemblies can be evenly arranged along the circumference as needed according to calculations.

[0038] The top end cap of the inner tank 2 is connected to the upper part of the outer tank 1 through a top support assembly 8. The top support assembly 8 is mainly composed of steel plate ribs, which are used to restrict the axial movement of the inner tank. 4 to 8 ribs can be evenly arranged in the circumferential direction as needed according to calculation. The steel plate ribs are arranged at an inclination angle β of 20° to 30°.

[0039] The inner tank 2 is typically composed of a cylindrical body and a top convex head and a bottom convex head. The convex head can be in various forms, including common external convex heads such as elliptical heads, spherical heads, and butterfly heads, and is usually in direct contact with the liquid hydrogen medium.

[0040] The outer tank 1 is typically composed of a cylindrical body and a top convex head and a bottom convex head. The convex head can be in various forms, including elliptical heads, spherical heads, butterfly heads, and other common convex heads. It usually encloses the inner tank and forms a certain annular space with the inner tank.

Claims

1. A vertical liquid hydrogen storage tank, comprising an outer tank and an inner tank, characterized in that: The inner tank is supported within the cavity of the outer tank by a support assembly and a top support assembly. There is an insulation layer between the inner tank and the outer tank. The support assembly includes a bottom support assembly, a horizontal tie rod assembly, and a vertical tie rod assembly. The lower part of the outer tank is also provided with an outer tank support assembly.

2. A vertical liquid hydrogen storage tank according to claim 1, characterized in that: The bottom support assembly includes an upper sleeve, a cold insulation block, and a lower sleeve. The upper sleeve is connected to the outer side of the bottom end cap of the inner tank, and the lower sleeve is connected to the inner side of the bottom end cap of the outer tank. The space between the upper sleeve and the lower sleeve is filled with a cold insulation block.

3. A vertical liquid hydrogen storage tank according to claim 1, characterized in that: The vertical tie rod assembly includes a third connecting plate, a vertical tie rod, a fourth connecting plate, and a vertical tie rod insulation pad. The third connecting plate is connected to the inner side of the outer tank. One end of the vertical tie rod is connected to the third connecting plate, and the other end is connected to the fourth connecting plate. The fourth connecting plate is connected to the outer side of the inner tank. Vertical tie rod insulation pads are provided between the vertical tie rod and the third connecting plate, and between the vertical tie rod and the fourth connecting plate.

4. A vertical liquid hydrogen storage tank according to claim 1 or 3, characterized in that: The vertical tie rod assembly consists of 6 to 12 rods arranged at a uniform circumferential angle.

5. A vertical liquid hydrogen storage tank according to claim 4, characterized in that: The tilt angle α of the vertical tie rod assembly is 70° to 80°.

6. A vertical liquid hydrogen storage tank according to claim 1, characterized in that: The horizontal tie rod assembly includes a first connecting plate, a horizontal tie rod, a second connecting plate, and a horizontal tie rod insulation pad. The first connecting plate is connected to the inner side of the outer tank. One end of the horizontal tie rod is connected to the first connecting plate, and the other end is connected to the second connecting plate. The second connecting plate is connected to the outer side of the inner tank. Horizontal tie rod insulation pads are provided between the horizontal tie rod and the first connecting plate, and between the horizontal tie rod and the second connecting plate.

7. A vertical liquid hydrogen storage tank according to claim 1 or 6, characterized in that: The horizontal tie rod assembly is arranged horizontally, with 4 to 8 evenly distributed along the circumference.

8. A vertical liquid hydrogen storage tank according to claim 1, characterized in that: The top support assembly is mainly composed of steel plate reinforcing bars, with 4 to 8 bars evenly arranged along the circumference.

9. A vertical liquid hydrogen storage tank according to claim 1 or 8, characterized in that: The tilt angle β of the top support component is 20° to 30°.

10. A vertical liquid hydrogen storage tank according to claim 1, characterized in that: The outer tank support assembly is supported by a skirt or legs.

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