An ultra-low temperature stationary liquid hydrogen storage tank with synergistic hydrogen injection and recovery of liquid hydrogen

Abstract

The utility model provides a kind of ultra-low temperature fixed liquid hydrogen storage tank with collaborative hydrogen injection and recovery liquid hydrogen, comprising: the outer tank being arranged outside the storage tank;The inner tank is arranged on the inner wall of outer tank;It further includes hydrogen injection system and recovery liquid hydrogen system connected with inner tank, through the collaborative action of hydrogen injection system and recovery liquid hydrogen system, the role of long time storage liquid hydrogen is played, the outer tank and inner tank have interlayer, the vacuum system for vacuumizing interlayer is arranged on the outer tank.The utility model through hydrogen injection system, recovery liquid hydrogen system, vacuum system collaborative operation, solve the problem of liquid hydrogen vaporization in the process of storing liquid hydrogen, achieve the purpose of long time storage liquid hydrogen.The design scheme can be independently designed or reasonably transform existing liquid hydrogen storage tank, with engineering implementability.

Description

Technical Field

[0001] This utility model relates to the field of marine energy utilization technology, and in particular to an ultra-low temperature stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery. Background Technology

[0002] Hydrogen is a highly efficient, clean, pollution-free, and sustainable energy carrier, and its storage and transportation are a crucial link in the entire hydrogen utilization industry chain. Compared with gaseous and solid hydrogen storage, liquid hydrogen storage and transportation offer advantages such as convenient storage, high purity, and high refueling efficiency, making it one of the important methods for hydrogen storage. Furthermore, liquid hydrogen has a high hydrogen density and high calorific value per unit mass, making it particularly important for addressing the vaporization problem in marine hydrogen energy utilization. Utility Model Content

[0003] The main technical problem to be solved by this utility model is the vaporization of liquid hydrogen during the storage process, so as to achieve the purpose of long-term storage of liquid hydrogen. In order to overcome the above-mentioned defects of the existing technology, an ultra-low temperature stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery includes: an outer tank disposed outside the storage tank; an inner tank disposed on the inner wall of the outer tank; wherein, it further includes a hydrogen injection system and a liquid hydrogen recovery system connected to the inner tank, the hydrogen injection system and the liquid hydrogen recovery system working together to achieve long-term storage of liquid hydrogen, the outer tank and the inner tank having an interlayer, and the outer tank being provided with a vacuum system for evacuating the interlayer.

[0006] Furthermore, two container saddles are located at the bottom of the outer tank.

[0007] Furthermore, the inner tank is fixedly mounted on the inner wall of the outer tank by an inner tank support.

[0008] Furthermore, the number of inner tank supports is four, evenly distributed at the top and bottom positions of the inner tank.

[0009] Furthermore, the outer tank is equipped with an outer tank reflector, and the inner tank is equipped with an inner tank radiation screen.

[0010] Furthermore, the inner tank is made of S31603 stainless steel, and the outer tank is made of S30408 ​​stainless steel.

[0011] Furthermore, the specific structure of the hydrogen injection system includes: a liquid hydrogen injection pipeline connected to the inner tank; a three-way pipeline located outside the outer tank and connected to the liquid hydrogen injection pipeline, one side of the three-way pipeline being connected to a regulating valve, and the other side being connected to a hydrogen liquefaction device via a first one-way valve, one end of the regulating valve being connected to the three-way pipeline via a pipeline, and the other end being connected to a check valve; and a hydrogen inlet being provided on the hydrogen liquefaction device.

[0012] Furthermore, the liquid hydrogen recovery system includes: a fourth one-way valve fixedly connected to the inner tank by welding, one end of the fourth one-way valve being connected to the inner tank and the other end being connected to a hydrogen collection device, one end of the hydrogen collection device being connected to the fourth one-way valve and the other end being connected to a hydrogen liquefaction device through a second one-way valve; it also includes a reflux pipeline, one end of which is connected to a third one-way valve and then sealed and welded to the inner tank, and the other end being connected to the hydrogen liquefaction device.

[0013] Furthermore, the vacuum system shown includes a pressure gauge and a vacuum device installed on the outer tank. A pressure sensor is installed between the pressure gauge and the vacuum device. The pressure sensor captures the pressure gauge data and transmits it to the vacuum device.

[0014] The beneficial effects of this utility model are:

[0015] This invention relates to a hydrogen injection system and a liquid hydrogen recovery system that integrate hydrogen injection and recovery. A vacuum system ensures the vacuum level in the space between the outer and inner tanks. The coordinated operation of the hydrogen injection system, liquid hydrogen recovery system, and vacuum system solves the problem of liquid hydrogen vaporization during storage, achieving long-term liquid hydrogen storage. This design can be independently designed or reasonably modified from existing liquid hydrogen storage tanks, demonstrating engineering feasibility. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Explanation of the labels in the diagram:

[0019] 1. Container saddle; 2. Inner tank support; 3. Liquid hydrogen filling pipeline; 4. Outer tank reflector; 5. Outer tank; 6. Inner tank; 7. Inner tank radiation screen; 8. T-junction pipeline; 9. Regulating valve; 10. Check valve; 11. First check valve; 12. Hydrogen inlet; 13. Hydrogen liquefaction device; 14. Second check valve; 15. Return pipeline; 16. Third check valve; 17. Hydrogen collection device; 18. Fourth check valve; 19. Vacuum pump; 20. Pressure gauge; 21. Pressure sensor. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0021] Example: Figure 1 The image shows a cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery.

[0022] The first embodiment of this utility model, referred to... Figure 1 As shown, a cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery is disclosed. The liquid hydrogen storage tank is fixed on an offshore oil platform and includes an outer tank 5 located outside the main tank, with two container saddles 1 at the bottom of the outer tank 5; an inner tank 6 located on the inner wall of the outer tank 5, wherein, preferably, the inner tank 6 is fixed to the inner wall of the outer tank 5 by inner tank supports 2, four of which are evenly distributed above and below the inner tank 6; and a hydrogen injection system and a liquid hydrogen recovery system connected to the inner tank 6. This synergistic hydrogen injection and liquid hydrogen recovery design achieves the goal of long-term liquid hydrogen storage and solves the problem of liquid hydrogen vaporization during storage.

[0023] Specifically, the outer tank 5 is equipped with an outer tank reflector 4, and the inner tank 6 is equipped with an inner tank radiation screen 7; the inner tank 6 is made of S31603 stainless steel, and the outer tank 5 is made of S30408 ​​stainless steel, so that the storage tank meets the requirements of ultra-low temperature (-253℃).

[0024] The specific structure of the hydrogen injection system includes a liquid hydrogen injection pipeline 3 connected to the inner tank 6; a three-way pipeline 8 located outside the outer tank 5 and connected to the liquid hydrogen injection pipeline 3, wherein a regulating valve 9 is connected to one side of the three-way pipeline 8 and a hydrogen liquefaction device 13 is connected to the other side through a first one-way valve 11; one end of the regulating valve 9 is connected to the three-way pipeline 8 through a pipeline and the other end is connected to a check valve 10; and a hydrogen inlet 12 is provided on the hydrogen liquefaction device 13.

[0025] The liquid hydrogen recovery system includes a fourth one-way valve 18 fixedly connected to the inner tank 6 by welding. One end of the fourth one-way valve 18 is connected to the inner tank 6, and the other end is connected to a hydrogen collection device 17. One end of the hydrogen collection device 17 is connected to the fourth one-way valve 18, and the other end is connected to a hydrogen liquefaction device 13 through a second one-way valve 14. It also includes a return pipeline 15, one end of which is connected to a third one-way valve 16 and then sealed and welded to the inner tank 6, and the other end is connected to the hydrogen liquefaction device 13. The entire liquid hydrogen recovery system is controlled by the hydrogen collection device 17.

[0026] Reference Figure 1 As shown, all check valves are configured with a flow direction from A to B.

[0027] During use, hydrogen gas enters the hydrogen liquefaction unit 13 through hydrogen inlet 12. Liquid hydrogen enters the inner tank 6 through the first one-way valve 11, the three-way pipe 8, and the liquid hydrogen filling pipe 3. The flow rate can be adjusted by the regulating valve 9, and the check valve 10 prevents backflow. If liquid hydrogen vaporizes during long-term storage, the vaporized liquid hydrogen and hydrogen gas enter the hydrogen collection unit 17 through the fourth one-way valve 18, and then enter the hydrogen liquefaction unit 13 through the second one-way valve 14. The liquefied hydrogen gas and liquid hydrogen return to the inner tank 6 through the return pipe 15 and the third one-way valve 16. The hydrogen filling system is used when hydrogen refueling is required. The liquid hydrogen recovery system is activated to recover hydrogen liquefaction gas based on the status of the hydrogen collection unit 17.

[0028] The second embodiment of this utility model is described below. Figure 1 As shown, there is a sandwich between the outer tank 5 and the inner tank 6. The outer tank 5 is equipped with a vacuum system for evacuating the sandwich. The vacuum system includes a pressure gauge 20 and a vacuum device 19 installed on the outer tank 5. A pressure sensor 21 is installed between the pressure gauge 20 and the vacuum device 19. The pressure sensor 21 captures the data from the pressure gauge 20 and transmits it to the vacuum device 19.

[0029] When in use, when the vacuum level is less than the predetermined value, the vacuum pumping device 19 will automatically operate to pump vacuum. Once the predetermined value is reached, it will stop working and work in a cycle according to the above work process, thereby ensuring the vacuum level of the interlayer between the outer tank 5 and the inner tank.

[0030] This utility model relates to a hydrogen injection system and a liquid hydrogen recovery system, which integrate hydrogen injection and liquid hydrogen recovery. A vacuum system ensures the vacuum level in the space between the outer tank 5 and the inner tank 6. Through the coordinated operation of the hydrogen injection system, the liquid hydrogen recovery system, and the vacuum system, the problem of liquid hydrogen vaporization during storage is solved, achieving the goal of long-term liquid hydrogen storage. This design scheme can be independently designed or reasonably modified from existing liquid hydrogen storage tanks, demonstrating engineering feasibility.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery, comprising: An outer tank (5) is set outside the storage tank; an inner tank (6) is set on the inner wall of the outer tank (5); characterized in that it also includes a hydrogen injection system and a liquid hydrogen recovery system connected to the inner tank (6), and through the synergistic effect of the hydrogen injection system and the liquid hydrogen recovery system, it plays the role of storing liquid hydrogen for a long time. There is a sandwich between the outer tank (5) and the inner tank (6), and a vacuum system for evacuating the sandwich is provided on the outer tank (5).

2. The cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery as described in claim 1, characterized in that, Two container saddles (1) are provided at the bottom of the outer tank (5).

3. The cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery as described in claim 1, characterized in that, The inner tank (6) is fixedly mounted on the inner wall of the outer tank (5) by the inner tank support (2).

4. A cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery as described in claim 3, characterized in that, The number of inner tank supports (2) is four, evenly distributed in the upper and lower positions of the inner tank (6).

5. A cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery as described in claim 1, characterized in that, The outer tank (5) is equipped with an outer tank reflector (4), and the inner tank (6) is equipped with an inner tank radiation screen (7).

6. A cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery as described in claim 1, characterized in that, The inner tank (6) is made of S31603 stainless steel, and the outer tank (5) is made of S30408 ​​stainless steel.

7. A cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery as described in claim 1, characterized in that, The specific structure of the hydrogen injection system includes: a liquid hydrogen injection pipeline (3) connected to the inner tank; a three-way pipeline (8) located outside the outer tank (5) and connected to the liquid hydrogen injection pipeline (3), wherein a regulating valve (9) is connected to one side of the three-way pipeline (8), and a hydrogen liquefaction device (13) is connected to the other side through a first one-way valve (11), wherein one end of the regulating valve (9) is connected to the three-way pipeline (8) through a pipeline, and the other end is connected to a check valve (10); and a hydrogen inlet (12) is provided on the hydrogen liquefaction device (13).

8. A cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery according to claim 7, characterized in that, The liquid hydrogen recovery system includes: a fourth check valve (18) fixedly connected to the inner tank (6) by welding, one end of the fourth check valve (18) being connected to the inner tank (6), and the other end being connected to a hydrogen collection device (17), one end of the hydrogen collection device (17) being connected to the fourth check valve (18), and the other end being connected to a hydrogen liquefaction device (13) through a second check valve (14); it also includes a return pipeline (15), one end of the return pipeline (15) being connected to a third check valve (16) and then sealed and welded to the inner tank (6), and the other end being connected to the hydrogen liquefaction device (13).

9. A cryogenic stationary liquid hydrogen storage tank with synergistic hydrogen injection and liquid hydrogen recovery as described in claim 1, characterized in that, The vacuum system shown includes a pressure gauge (20) and a vacuum device (19) installed on the outer tank (5). A pressure sensor (21) is installed between the pressure gauge (20) and the vacuum device (19). The pressure sensor (21) captures the data of the pressure gauge (20) and transmits it to the vacuum device (19).

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