Treatment Device for Abandoned High-Pressure Hydrogen Storage Tanks of Hydrogen Fuel Cell Vehicles and Hydrogen Recovery Method

Abstract

The present invention discloses a treatment device for waste high-pressure hydrogen storage tanks of hydrogen fuel cell vehicles, which is provided with a hydrogen collection tank (15), a circulating water tank (7), and a hydrogen storage tank exhaust container (3); the hydrogen storage tank (22) is connected to the lower part of the hydrogen storage tank exhaust container (3); the circulating water tank (7) is communicated with the hydrogen storage tank exhaust container (3) through a water inlet pipe (1) and a drain pipe (2); the hydrogen collection tank (15) is communicated with the upper part of the hydrogen storage tank exhaust container (3) through a hydrogen exhaust pipeline. The present invention also discloses a hydrogen recovery method for the treatment device. By adopting the above technical solutions, potential safety hazards and environmental pollution problems caused by the abandonment of the tank body are effectively addressed, enabling the hydrogen in various high-pressure tanks, including high-pressure hydrogen storage tanks, to be recycled to the greatest extent; the degree of automation of the entire recovery and treatment process is high, achieving reasonable recovery and treatment of the high-pressure hydrogen storage tank body after abandonment.

Description

Technical Field

[0001] The present invention belongs to the technical field of power systems for new energy vehicles such as hybrid vehicles. More specifically, the present invention relates to a treatment device for waste high-pressure hydrogen storage tanks of hydrogen fuel cell vehicles; and a hydrogen recovery method applied to the treatment device. Background Art

[0002] Currently, hydrogen fuel cell vehicles are developing rapidly. Given that high-pressure hydrogen storage tanks are essential energy containers for hydrogen fuel cell vehicles, after large-scale mass production in the future, with the scrapping of hydrogen fuel cell vehicles and high-pressure hydrogen storage tanks due to lifespan and various reasons, the recycling and treatment of high-pressure hydrogen storage tanks installed on vehicles have become particularly important.

[0003] The hydrogen in the high-pressure hydrogen storage tank is a flammable and explosive gas, and the carbon fiber composite material used for the tank body cannot be naturally degraded. If it is discarded and disposed of randomly after scrapping, it will bring greater potential safety hazards and environmental pollution, and there is currently no corresponding technical solution at home and abroad to deal with the problem of recovering the residual hydrogen in the high-pressure hydrogen storage tank. And if the residual hydrogen cannot be recovered, there are quite large potential hazards in the discarded hydrogen storage tank. Summary of the Invention

[0004] The present invention provides a treatment device for waste high-pressure hydrogen storage tanks of hydrogen fuel cell vehicles, and its purpose is to achieve safe and efficient treatment of scrapped hydrogen storage tanks.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] The treatment device for waste high-pressure hydrogen storage tanks of the present invention is used for recycling and treating hydrogen storage tanks; the treatment device is provided with a hydrogen collection tank, a circulating water tank, and a hydrogen storage tank exhaust container; the hydrogen storage tank is connected to the lower part of the hydrogen storage tank exhaust container; the circulating water tank is communicated with the hydrogen storage tank exhaust container through a water inlet pipe and a drain pipe; the hydrogen collection tank is communicated with the upper part of the hydrogen storage tank exhaust container through a hydrogen exhaust pipeline.

[0007] A rotary broken-wall drill bit for drilling the hydrogen storage tank is provided inside the hydrogen storage tank exhaust container, and a rotary table annular base is arranged at the bottom end inside the hydrogen storage tank exhaust container, and the hydrogen storage tank is fixedly installed on the rotary table annular base through a tank body clamping device.

[0008] A rotary broken-wall drill bit for drilling the hydrogen storage tank is provided inside the hydrogen storage tank exhaust container.

[0009] The rotary broken-wall drill bit is installed in the hydrogen storage tank exhaust container through a broken-wall drill bit robotic arm.

[0010] The hydrogen storage tank exhaust container is a hydrogen storage tank exhaust container.

[0011] A sealed top cover is provided at the upper part of the hydrogen storage tank exhaust container, and an air intake and exhaust pipeline is provided on the sealed top cover.

[0012] An air intake and exhaust valve is provided on the air intake and exhaust pipeline.

[0013] The sealed top cover is fixedly installed on the body of the hydrogen storage tank exhaust container through a connecting buckle.

[0014] An inlet water pump and an inlet water valve are provided on the inlet water pipe; a drain water pump and a drain water valve are provided on the drain water pipe.

[0015] The hydrogen exhaust pipeline includes a soft hydrogen exhaust pipeline and a hard hydrogen exhaust pipeline connected in sequence in the hydrogen exhaust direction; a hydrogen exhaust valve is provided on the soft hydrogen exhaust pipeline; a booster pump is provided on the hard hydrogen exhaust pipeline.

[0016] In order to achieve the same invention purpose as the above technical solution, the present invention also provides a hydrogen recovery method for the hydrogen fuel cell vehicle waste high-pressure hydrogen storage tank treatment device described above. The technical solution is as follows: The process of this method is:

[0017] Step 1: Clean the surface of the hydrogen storage tank to be disassembled.

[0018] Step 2: Open the sealed top cover above the hydrogen storage tank exhaust container, clamp the smooth tail of the hydrogen storage tank body upward on the tank body clamping device on the turntable annular base, and then cover the sealed top cover to ensure the seal of the hydrogen storage tank exhaust container.

[0019] Step 3: Open the inlet water valve installed on the inlet water pipe and the air intake and exhaust valve installed on the air intake and exhaust pipeline. The inlet water pump pumps the water in the circulation water tank into the hydrogen storage tank exhaust container until the water fills the entire hydrogen storage tank exhaust container. The air originally in the hydrogen storage tank exhaust container is discharged from the air intake and exhaust pipeline due to the injection of water.

[0020] Step 4: When all the air in the hydrogen storage tank exhaust container is exhausted, close the air intake and exhaust valve and the inlet water valve, and open the drain water valve installed on the drain water pipe.

[0021] Step 5: Adjust the mechanical arm of the wall-breaking drill bit so that the rotating wall-breaking drill bit aligns with the smooth tank body tail of the upward hydrogen storage tank and drills through the tank body wall; at this time, the high-pressure hydrogen in the hydrogen storage tank will all emerge from the hydrogen storage tank and gather at the top of the hydrogen storage tank exhaust container. Part of the water that originally filled the container will be discharged into the circulation water tank from the drain water pipe under the extrusion of the hydrogen emerging from the tank body of the hydrogen storage tank exhaust container, and the hydrogen storage tank after being drilled through the wall will be completely filled with water, so as to ensure that the residual hydrogen in the hydrogen storage tank is completely exhausted.

[0022] Step 6: Open the hydrogen exhaust valve installed on the flexible hydrogen exhaust pipe, open the water inlet valve, close the drain valve. The water inlet pump pumps the water in the circulation water tank into the hydrogen storage tank exhaust container until the water fills the entire hydrogen storage tank exhaust container. The hydrogen that originally accumulated above the hydrogen storage tank exhaust container is discharged from the flexible hydrogen exhaust pipe due to the injection of water. During the hydrogen discharge process, the booster pump on the rigid hydrogen exhaust pipe keeps working to compress the low-pressure hydrogen into the hydrogen collection tank for storage.

[0023] Step 7: When all the hydrogen is completely exhausted, close the hydrogen exhaust valve and the water inlet valve, thus completing the recovery of the residual hydrogen in the hydrogen storage tank.

[0024] Adopting the above technical solution, the present invention effectively addresses the potential safety hazards and environmental pollution problems caused by the abandonment of the tank body, enabling the maximum recovery and utilization of the hydrogen in various high-pressure tanks including high-pressure hydrogen storage tanks. The entire recovery and treatment process has a high degree of automation, achieving the reasonable recovery and treatment of the high-pressure hydrogen storage tank body after abandonment. Brief Description of the Drawings

[0025] The content shown in the drawings and the markings in the figures are briefly described as follows:

[0026] Figure 1 It is a schematic structural diagram of the present invention.

[0027] The markings in the figure are:

[0028] 1. Water inlet pipe, 2. Drain pipe, 3. Hydrogen storage tank exhaust container, 4. Sealing top cover, 5. Flexible hydrogen exhaust pipe, 6. Rigid hydrogen exhaust pipe, 7. Circulation water tank, 8. Water inlet pump, 9. Water inlet valve, 10. Drain pump, 11. Drain valve, 12. Air intake and exhaust pipe, 13. Air intake and exhaust valve, 14. Hydrogen exhaust valve, 15. Hydrogen collection tank, 16. Booster pump, 17. Rotary table annular base, 18. Tank body clamping device, 19. Connecting buckle, 20. Wall-breaking drill robotic arm, 21. Rotary wall-breaking drill, 22. Hydrogen storage tank. Detailed Embodiment

[0029] The following further details the specific embodiments of the present invention by describing the embodiments with reference to the drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0030] As Figure 1 shown in the structure of the present invention, it is a new type of device for treating the abandoned high-pressure hydrogen storage tank of a hydrogen fuel cell vehicle, which is used to recover and treat the hydrogen storage tank 22 and the hydrogen therein, thereby effectively addressing the potential safety hazards and environmental pollution problems caused by the abandonment of the tank body.

[0031] To solve the problems existing in the prior art and overcome its deficiencies, and to achieve the invention purpose of safely and efficiently treating scrapped hydrogen storage tanks, the technical solution adopted by the present invention is as follows:

[0032] As Figure 1 shown, the hydrogen storage tank treatment device for discarded high-pressure hydrogen storage tanks of the present invention is provided with a hydrogen collection tank 15, a circulating water tank 7, and a hydrogen storage tank exhaust container 3; the hydrogen storage tank 22 is connected to the lower part of the hydrogen storage tank exhaust container 3; the circulating water tank 7 is communicated with the hydrogen storage tank exhaust container 3 through a water inlet pipe 1 and a drain pipe 2; the hydrogen collection tank 15 is communicated with the upper part of the hydrogen storage tank exhaust container 3 through a hydrogen exhaust pipeline.

[0033] The water inlet pipe 1 and the drain pipe 2 are installed at the bottom of the hydrogen storage tank exhaust container 3. The water inlet pipe 1 and the drain pipe 2 are connected to the same circulating water tank 7.

[0034] The above-mentioned hydrogen recovery device for the high-pressure hydrogen storage tank body of the new hydrogen fuel cell vehicle of the present invention effectively treats the potential safety hazards and environmental pollution problems caused by the abandonment of the tank body, enabling the hydrogen in various high-pressure tanks including high-pressure hydrogen storage tanks to be recycled to the greatest extent; the degree of automation of the whole process is high, realizing the safe, efficient and reasonable recovery, treatment and utilization of the high-pressure hydrogen storage tank body and the hydrogen therein after abandonment.

[0035] A rotary broken-wall drill bit base 17 is provided at the bottom end inside the hydrogen storage tank exhaust container 3, and the hydrogen storage tank 22 is fixedly installed on the rotary broken-wall drill bit base 17 through a tank body clamping device 18.

[0036] A rotary broken-wall drill bit 21 for drilling the hydrogen storage tank 22 is provided inside the hydrogen storage tank exhaust container 3.

[0037] The rotary broken-wall drill bit 21 is installed in the hydrogen storage tank exhaust container 3 through a broken-wall drill bit robotic arm 20.

[0038] One of the rotary broken-wall drill bits 21 drills and breaks the wall on the surface of the upper hydrogen storage tank 22 (i.e., the tail of the hydrogen storage tank 22); the other rotary broken-wall drill bit 21 drills and breaks the wall on the side of the hydrogen storage tank 22. Since the hydrogen storage tank 22 rotates, the side wall of the entire hydrogen storage tank 22 can be drilled and broken.

[0039] The hydrogen storage tank exhaust container 3 is a hydrogen storage tank exhaust container.

[0040] A sealed top cover 4 is provided on the upper part of the hydrogen storage tank exhaust container 3, and an air intake and exhaust pipeline 12 is provided on the sealed top cover 4.

[0041] A sealing material is provided between the contact surface of the sealed top cover 4 and the hydrogen storage tank exhaust container 3 to ensure sealing during the recovery and treatment process.

[0042] An air intake and exhaust valve 13 is provided on the air intake and exhaust pipeline 12. The air intake and exhaust pipeline 12 is connected to the atmosphere, and an air intake and exhaust valve 13 is installed at the connection between the air intake and exhaust pipeline 12 and the sealed top cover 4.

[0043] The sealed top cover 4 is fixedly installed on the body of the hydrogen storage tank exhaust container 3 through a connection buckle 19.

[0044] An intake water pump 8 and an intake water valve 9 are provided on the water inlet pipe 1; a drainage water pump 10 and a drainage water valve 11 are provided on the drainage pipe 2. The power for water intake and drainage is provided by the intake water pump 8 and the drainage water pump 10 driven by electricity.

[0045] A soft hydrogen exhaust pipeline 5 and an air intake and exhaust pipeline 12 are connected to the sealed top cover 4 at the upper part of the hydrogen storage tank exhaust container 3; the soft hydrogen exhaust pipeline 5 is connected to a hard hydrogen exhaust pipeline 6. That is: the hydrogen exhaust pipeline includes a soft hydrogen exhaust pipeline 5 and a hard hydrogen exhaust pipeline 6 connected in sequence in the hydrogen exhaust direction; a hydrogen exhaust valve 14 is provided on the soft hydrogen exhaust pipeline 5; a booster pump 16 is provided on the hard hydrogen exhaust pipeline 6.

[0046] The other end of the soft hydrogen exhaust pipeline 5 is connected to a hydrogen collection tank 15. A booster pump 16 is installed on the hard hydrogen exhaust pipeline 6 between the hydrogen exhaust valve 14 and the hydrogen collection tank 15.

[0047] A hydrogen exhaust valve 14 is installed at the connection between the hydrogen storage tank exhaust container 3 and the soft hydrogen exhaust pipeline 5, and the power for exhaust is to pump water into the hydrogen storage tank exhaust container 3 by the intake water pump 8 driven by electricity to squeeze out the gas above.

[0048] The opening and closing of the intake water valve 9, the drainage water valve 11, the air intake and exhaust valve 13, and the hydrogen exhaust valve 14 are all controlled by a single-chip microcomputer.

[0049] In order to achieve the same invention purpose as the above technical solution, the present invention also provides a hydrogen recovery method for the hydrogen fuel cell vehicle waste high-pressure hydrogen storage tank treatment device described above. The technical solution is: the process of this hydrogen recovery method is as follows:

[0050] Step 1: Clean the surface of the hydrogen storage tank 22 to be disassembled.

[0051] Step 2: Open the sealed top cover 4 above the hydrogen storage tank exhaust container 3, clamp the smooth tail of the hydrogen storage tank 22 body upward on the tank body clamping device 18 on the turntable annular base 17, and then cover the sealed top cover 4 to ensure the sealing of the hydrogen storage tank exhaust container 3.

[0052] Step 3: Open the water inlet valve 9 installed on the water inlet pipe 1 and the air inlet and exhaust valve 13 installed on the air inlet and exhaust pipe. The water inlet pump 8 pumps the water in the circulation water tank 7 into the hydrogen storage tank exhaust container 3 until the water fills the entire hydrogen storage tank exhaust container 3. The air originally in the hydrogen storage tank exhaust container 3 is discharged from the air inlet and exhaust pipe 12 due to the injection of water.

[0053] Step 4: When all the air in the hydrogen storage tank exhaust container 3 is exhausted, close the air inlet and exhaust valve 13 and the water inlet valve 9, and open the drain valve 11 installed on the drain pipe 2.

[0054] Step 5: Adjust the mechanical arm 20 of the rotary breaking drill bit so that the rotary breaking drill bit 21 aligns with the smooth tail of the upward hydrogen storage tank 22 and drills and breaks the tank body. At this time, the high-pressure hydrogen in the hydrogen storage tank 22 will all emerge from the hydrogen storage tank 22 and gather at the top of the hydrogen storage tank exhaust container 3. Part of the water that originally filled the container will be discharged into the circulation water tank 7 from the drain pipe 2 under the extrusion of the hydrogen emerging from the tank body of the hydrogen storage tank exhaust container 3. The hydrogen storage tank 22 after being drilled and broken will be completely filled with water, thus ensuring that the residual hydrogen in the hydrogen storage tank 22 is completely drained.

[0055] Step 6: Open the hydrogen exhaust valve 14 installed on the soft hydrogen exhaust pipe 5, open the water inlet valve 9, close the drain valve 11. The water inlet pump 8 pumps the water in the circulation water tank 7 into the hydrogen storage tank exhaust container 3 until the water fills the entire hydrogen storage tank exhaust container 3. The hydrogen that originally accumulated above the hydrogen storage tank exhaust container 3 is discharged from the soft hydrogen exhaust pipe 5 due to the injection of water. During the hydrogen discharge process, the booster pump 16 on the hard hydrogen exhaust pipe 6 keeps working to compress the low-pressure hydrogen into the hydrogen collection tank 15 for storage. On the other hand, the booster pump 16 also plays a role in pumping out the hydrogen in the upper part of the hydrogen storage tank exhaust container 3.

[0056] Step 7: When all the hydrogen is exhausted, close the hydrogen exhaust valve 14 and the water inlet valve 9, thus completing the recovery of the residual hydrogen in the hydrogen storage tank 22.

[0057] The above has described the present invention exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. Hydrogen recovery method for waste high-pressure hydrogen storage tank treatment device of hydrogen fuel cell vehicle, where the treatment device is used for recycling the hydrogen storage tank (22); The treatment device is provided with a hydrogen collection tank (15), a circulating water tank (7), and a hydrogen storage tank exhaust container (3); the hydrogen storage tank (22) is connected to the lower part of the hydrogen storage tank exhaust container (3); the circulating water tank (7) is communicated with the hydrogen storage tank exhaust container (3) through a water inlet pipe (1) and a drain pipe (2); the hydrogen collection tank (15) is communicated with the upper part of the hydrogen storage tank exhaust container (3) through a hydrogen exhaust pipeline; A rotary breaking wall drill bit (21) for drilling the hydrogen storage tank (22) is arranged inside the hydrogen storage tank exhaust container (3) at the bottom end; the hydrogen storage tank (22) is fixedly installed on the rotary ring base (17) through a tank body clamping device (18); there are two rotary breaking wall drill bits (21), one of the rotary breaking wall drill bits (21) drills and breaks the surface of the upper hydrogen storage tank (22); the other rotary breaking wall drill bit (21) drills and breaks the side surface of the hydrogen storage tank (22); the rotary breaking wall drill bit (21) is installed in the hydrogen storage tank exhaust container (3) through a breaking wall drill bit robotic arm (20); A sealed top cover (4) is arranged on the upper part of the hydrogen storage tank exhaust container (3), and an air intake and exhaust pipeline (12) is arranged on the sealed top cover (4); an air intake and exhaust valve (13) is arranged on the air intake and exhaust pipeline (12); the sealed top cover (4) is fixedly installed on the body of the hydrogen storage tank exhaust container (3) through a connecting buckle (19); An inlet water pump (8) and an inlet water valve (9) are arranged on the water inlet pipe (1); a drain water pump (10) and a drain water valve (11) are arranged on the drain pipe (2); The hydrogen exhaust pipeline includes a soft hydrogen exhaust pipeline (5) and a hard hydrogen exhaust pipeline (6) connected in sequence in the hydrogen exhaust direction; a hydrogen exhaust valve (14) is arranged on the soft hydrogen exhaust pipeline (5); a booster pump (16) is arranged on the hard hydrogen exhaust pipeline (6); The opening and closing of the inlet water valve (9), the drain water valve (11), the air intake and exhaust valve (13), and the hydrogen exhaust valve (14) are all controlled by a single-chip microcomputer; It is characterized in that The process of this hydrogen recovery method is as follows: Step 1: Clean the surface of the hydrogen storage tank (22) to be disassembled; Step 2: Open the sealed top cover (4) above the hydrogen storage tank exhaust container (3), clamp the smooth tail of the hydrogen storage tank (22) body upward on the tank body clamping device (18) on the rotary ring base (17), and then cover the sealed top cover (4) to ensure the sealing of the hydrogen storage tank exhaust container (3); Step 3: Open the water inlet valve (9) installed on the water inlet pipe (1) and the air inlet and exhaust valve (13) installed on the air inlet and exhaust pipe. The water inlet pump (8) pumps the water in the circulation water tank (7) into the hydrogen storage tank exhaust container (3) until the water fills the entire hydrogen storage tank exhaust container (3). The air originally in the hydrogen storage tank exhaust container (3) is discharged from the air inlet and exhaust pipe (12) due to the injection of water. Step 4: When all the air in the hydrogen storage tank exhaust container (3) is exhausted, close the air inlet and exhaust valve (13) and the water inlet valve (9), and open the drain valve (11) installed on the drain pipe (2). Step 5: Adjust the mechanical arm of the wall-breaking drill bit (20) so that the rotating wall-breaking drill bit (21) aligns with the smooth tail of the upward hydrogen storage tank (22) to drill and break the wall of the tank. At this time, the high-pressure hydrogen gas in the hydrogen storage tank (22) will all emerge from the hydrogen storage tank (22) and accumulate at the top of the hydrogen storage tank exhaust container (3). Part of the water that originally filled the container will be discharged from the drain pipe (2) into the circulation water tank (7) under the extrusion of the hydrogen gas emerging from the hydrogen storage tank exhaust container (3). After the hydrogen storage tank (22) is drilled and broken, the hydrogen storage tank (22) will be completely filled with water, thus ensuring that the residual hydrogen gas in the hydrogen storage tank (22) is completely exhausted. Step 6: Open the hydrogen exhaust valve (14) installed on the soft hydrogen exhaust pipe (5), open the water inlet valve (9), close the drain valve (11). The water inlet pump (8) pumps the water in the circulation water tank (7) into the hydrogen storage tank exhaust container (3) until the water fills the entire hydrogen storage tank exhaust container (3). The hydrogen gas that originally accumulated above the hydrogen storage tank exhaust container (3) is discharged from the soft hydrogen exhaust pipe (5) due to the injection of water. During the process of hydrogen gas discharge, the booster pump (16) on the hard hydrogen exhaust pipe (6) keeps working to compress the low-pressure hydrogen gas into the hydrogen collection tank (15) for storage. Step 7: When all the hydrogen gas is exhausted, close the hydrogen exhaust valve (14) and the water inlet valve (9), thus completing the recovery of the residual hydrogen gas in the hydrogen storage tank (22).

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