Hydrogen supply energy storage device and energy storage method

Abstract

The invention discloses a hydrogen supply and energy storage device which comprises a fixing frame, a storage outer tank, a storage inner tank, a safety box, a liquid hydrogen storage tank, a first heat exchange box, a second heat exchange box and a mounting box, and the invention further comprises an energy storage method of the hydrogen supply and energy storage device which comprises the following steps that S1, hydrogen is introduced; s2, hydrogen compression; s3, heat exchange and precooling; s4, liquid storage; and S5, reflux compression. In the hydrogen liquefaction process, the motor can be synchronously started, the nut can drive the wedge block to slide through the wedge face end above the nut, then the cleaning frame and the cleaning brush are driven to slide, the wedge block is gradually in extrusion contact with the shifting block in the forward sliding process, and the wedge block is gradually extruded into the sliding block box; and the cleaning frame is driven to reset under the action of a second spring, so that reciprocating sliding of the cleaning brush is achieved, and defrosting treatment is conducted on the heat exchange pipe and the pre-cooling pipe.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to a hydrogen supply and storage device and method. Background Technology

[0002] Hydrogen energy storage, as one of the key technologies for renewable energy consumption and grid peak shaving, has received widespread attention in the new energy industry due to its advantages such as high energy density, long storage period, and zero carbon emissions.

[0003] For example, in the hydrogen energy storage device and method disclosed in patent number "CN118998600B", the rotating motor drives the heat exchange fan installed at its output end to rotate when it starts. When the heat exchange fan rotates, the airflow comes into contact with the outer surface of the heat exchange tube. The generated airflow carries away the heat energy generated by the hydrogen in the heat exchange tube 16, thereby realizing the condensation function. When the hydrogen moves along the heat exchange tube, when the temperature of the hydrogen drops below its boiling point, the hydrogen begins to condense into a liquid state and is eventually discharged into the interior of the lower storage tank, realizing the liquefaction and storage of hydrogen. However, this device does not have defrosting or anti-frost devices. In the key link of hydrogen liquefaction and storage, the heat exchange tube and precooling tube are the core heat exchange components, and their heat exchange efficiency directly determines the liquefaction effect. During the low-temperature liquefaction process, water vapor in the outside air is easy to condense on the surface of the pipe to form a frost layer. The frost layer will gradually accumulate and thicken over time, seriously hindering heat transfer, causing the liquefaction efficiency to drop continuously, and even causing pipe blockage, equipment shutdown and other failures. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hydrogen supply and storage device and energy storage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hydrogen supply and storage device includes a mounting frame, an outer storage tank, an inner storage tank, a safety box, a liquid hydrogen storage tank, a first heat exchange box, a second heat exchange box, and an installation box. The two heat exchange boxes are equipped with nitrogen sealing and anti-frost components, which are used to fill the heat exchange boxes with nitrogen to maintain a slight positive pressure and isolate moisture. The heat exchange boxes are also equipped with cleaning components, which are used to clean the frost layer formed in the heat exchange boxes. The heat exchange boxes are also equipped with a vibration component, which is used to shake off the frost layer accumulated in the heat exchange boxes.

[0007] The cleaning assembly includes a cleaning frame, cleaning brushes, a second slider, a second slide groove, and a transmission mechanism. The transmission mechanism is used to drive the cleaning frame to slide back and forth for cleaning. The second slide groove is located at the upper end of the heat exchange box. The second slider slides in the second slide groove. The lower end of the second slider is fixedly connected to the cleaning frame. A plurality of cleaning brushes are arranged around the inner wall of the cleaning frame.

[0008] Preferably, the transmission mechanism includes a wedge block, a slider box, a second spring, a third spring, a telescopic rod, a nut, a first slider, a first slide groove, and a lever.

[0009] Preferably, the slider box is located at the lower end of the cleaning frame, the telescopic rod is located inside the slider box, the wedge block is fixedly connected to the telescopic end of the telescopic rod, one end of the third spring is fixedly connected to the telescopic rod and the other end is fixedly connected to the wedge block, one end of the second spring is fixedly connected to the side wall of the slider box and the other end is fixedly connected to the inner wall of the heat exchange box, the nut is located below the wedge block, the first slide groove is located at the lower end of the heat exchange box, the first slider is fixedly connected to the lower end of the nut and slides within the first slide groove, and the lever is located at the lower end of the heat exchange box, with its position corresponding to the wedge end of the wedge block.

[0010] Preferably, the vibration assembly includes a rack, a guide rod, a guide block, a first spring, and a drive mechanism, wherein the drive mechanism is used to drive the rack to slide back and forth.

[0011] Preferably, the guide rod is disposed at the bottom of the heat exchange box, the guide block slides on the guide rod, one end of the first spring is fixedly connected to the guide block, the other end is fixedly connected to the lower end of the heat exchange box, and the rack is fixedly connected to the guide block.

[0012] Preferably, the drive mechanism includes a motor, a first synchronous pulley, a second synchronous pulley, a synchronous belt, and a double-ended reciprocating lead screw. The output shaft of the motor is fixedly connected to one end of the double-ended reciprocating lead screw, and the other end of the double-ended reciprocating lead screw is rotatably connected to the side wall of the heat exchange box. The first synchronous pulley and the second synchronous pulley are respectively fixedly connected to the corresponding double-ended reciprocating lead screw. The two synchronous pulleys are connected by a synchronous belt drive, and the nut slides on the double-ended reciprocating lead screw.

[0013] Preferably, the lower end of the storage tank is provided with an exhaust pipe, and an exhaust valve is fixedly connected to the exhaust pipe. The installation box is provided with a compressor motor and a compressor. The output shaft of the compressor motor is fixedly connected to the rotating shaft of the compressor. One end of the first three-way pipe is fixedly connected to the exhaust pipe, and the other two ends are fixedly connected to the air inlet of the corresponding compressor. One end of the second three-way pipe is fixedly connected to the air outlet of the corresponding compressor, and a pressure relief valve is provided in the two ends. The remaining end of the second three-way pipe is fixedly connected to a heat exchange pipe.

[0014] Preferably, the heat exchange tube is divided into two parts, which are respectively installed in the first heat exchange box and the second heat exchange box. The two parts are fixedly connected through the side wall of the heat exchange box. One end of the heat exchange tube in the second heat exchange box is connected to the liquid hydrogen storage tank through a liquefaction throttling valve. The first heat exchange box and the second heat exchange box are respectively provided with a first precooling tube and a second precooling tube. The heat exchange tube is fixedly connected to the corresponding precooling tube through several heat-conducting rings. The outer storage tank is provided with a first air inlet and a second air inlet. One end of the second precooling tube is fixedly connected to a circulation pipe, and the other end of the circulation pipe is fixedly connected to the air inlet of the compressor. The other end of the second precooling tube is connected to the liquid hydrogen storage tank through a first pressure relief pipe. The first heat exchange box and the second heat exchange box are respectively provided with a second pressure relief pipe.

[0015] Preferably, the nitrogen-sealed anti-frost assembly includes an inlet pipe, an outlet pipe, a third three-way pipe, and mounting blocks. The inlet pipe is fixedly connected to one end of the first precooling pipe, the other end of the first precooling pipe is fixedly connected to one end of the outlet pipe, and the other end of the outlet pipe is fixedly connected to the gas storage bladder. A pressure relief valve is provided inside one end of the third three-way pipe, and this end is fixedly connected to the gas storage bladder. The two mounting blocks are located at the upper end of the cleaning frame, and the other two ends of the third three-way pipe are respectively fixedly connected to the corresponding mounting blocks.

[0016] The energy storage method of the above-mentioned hydrogen supply and storage device includes the following steps:

[0017] S1. Hydrogen introduction: Low-pressure hydrogen to be stored is introduced into the inner storage tank through the second air inlet on the outer storage tank to complete the initial storage of hydrogen.

[0018] S2. Hydrogen compression: Start the compressor motor to drive the compressor to run. Low-pressure hydrogen in the storage tank enters the compressor through the exhaust pipe.

[0019] S3. Heat exchange and precooling: High-pressure hydrogen enters the heat exchange tube through the second three-way pipe, first flows through the tube section in the first heat exchange box, and exchanges heat with the first precooling tube; the precooled hydrogen continues to flow through the heat exchange tube in the second heat exchange box and undergoes deep precooling with the second precooling tube.

[0020] S4. Liquid storage: After being pre-cooled in two stages, the high-pressure hydrogen gas flows through the liquefaction throttle valve and undergoes Joule-Thomson isenthalpic expansion within the valve to achieve gas-liquid phase change and form liquid hydrogen.

[0021] S5. Reflux compression: Liquid hydrogen enters the liquid hydrogen storage tank through the pipeline for storage. The gaseous hydrogen that is not completely liquefied flows back to the second pre-cooling pipe through the first pressure relief pipe, where it exchanges heat with the subsequent high-pressure hydrogen and recovers cold energy. After that, it enters the compressor inlet again through the circulation pipe to achieve cyclic liquefaction.

[0022] The present invention has the following beneficial effects:

[0023] 1. In the process of liquefying hydrogen, the present invention can simultaneously start the motor. The nut can drive the wedge block to slide through its upper wedge end, thereby driving the cleaning frame and cleaning brush to slide. As the wedge block slides forward, it gradually presses and contacts the push block, and the wedge block is gradually pressed into the slider box. Under the action of the second spring, the cleaning frame is driven to reset, thereby realizing the reciprocating sliding of the cleaning brush to defrost the heat exchange tube and the precooling tube.

[0024] 2. Furthermore, when high-pressure hydrogen flows through the first part of the heat exchange tube, it can be pre-cooled by a liquid nitrogen cold source connected through the inlet pipe. After heat exchange, the liquid nitrogen evaporates into gas and is discharged from the outlet pipe and stored in the gas storage bag. The pressure relief valve in the third three-way pipe opens at regular intervals. Its two ends, which are fixed on the mounting block, slide back and forth synchronously with the cleaning frame, gradually filling the heat exchange box with the evaporated nitrogen gas, further suppressing the formation of frost.

[0025] 3. Furthermore, while the double-headed reciprocating screw rotates, the missing gear rotates synchronously. The missing gear intermittently meshes with the rack. When the rack slides downward, the first spring gradually stores energy. When the missing gear rotates to the missing tooth part, the rack loses its meshing transmission function. The first spring releases its elastic potential energy to drive the rack to move upward, thereby realizing the rack's reciprocating sliding. When the rack returns to its original sliding position, the striking part above it vibrates the pipe, shaking off the frost layer that has formed. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a hydrogen supply and storage device proposed in this invention.

[0027] Figure 2 This is a schematic diagram of the internal cross-sectional structure of a hydrogen supply and storage device proposed in this invention.

[0028] Figure 3 This is a schematic diagram of the internal structure of the safety box and the first heat exchange box.

[0029] Figure 4 This is a schematic diagram of the internal structure of the second heat exchanger.

[0030] Figure 5 A schematic diagram of the connection structure of the nitrogen-sealed anti-frost component, the cleaning component, and the vibration component;

[0031] Figure 6 A schematic diagram of the connection structure of the cleaning component;

[0032] Figure 7 This is a schematic diagram of the connection structure between the first heat exchange box and the second slide rail.

[0033] Figure 8 This is a schematic diagram of the connection structure of the heat exchange tube, the first precooling tube, and the second precooling tube.

[0034] Figure 9 for Figure 2 Enlarged view of point A in the middle;

[0035] Figure 10 for Figure 3 Enlarged view at point B in the middle;

[0036] Figure 11 for Figure 4 Enlarged view at point C;

[0037] Figure 12 for Figure 6 Enlarged view of point D in the middle.

[0038] In the diagram: 1. Fixture; 2. Outer storage tank; 3. First air inlet; 4. Second air inlet; 5. Inner storage tank; 6. Exhaust pipe; 7. Exhaust valve; 8. First tee pipe; 9. Compressor motor; 10. Compressor; 11. Second tee pipe; 12. Heat exchanger pipe; 13. First pre-cooling pipe; 14. Heat-conducting ring; 15. Liquid inlet pipe; 16. Liquid outlet pipe; 17. Gas storage bladder; 18. Safety box; 19. Third tee pipe; 20. Mounting block; 21. Liquefaction throttle valve; 22. Liquid hydrogen storage tank; 23. First pressure relief pipe; 24. Second pre-cooling pipe; 25. Circulation pipe; 26. Motor. 27 First synchronous pulley, 28 Second synchronous pulley, 29 Synchronous belt, 30 Double-ended reciprocating screw, 31 Nut, 32 First slider, 33 First slide groove, 34 First heat exchange box, 35 Second heat exchange box, 36 Second pressure relief pipe, 37 Missing gear, 38 Rack, 39 Guide rod, 40 Guide block, 41 First spring, 42 Wedge block, 43 Slider box, 44 Second spring, 45 Third spring, 46 Telescopic rod, 47 Cleaning frame, 48 Cleaning brush, 49 Second slider, 50 Second slide groove, 51 Pulley, 52 Mounting box. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Example 1:

[0041] Reference Figures 1-9 and Figure 11 , Figure 12 A hydrogen supply and storage device includes a fixed frame 1, an outer storage tank 2, an inner storage tank 5, a safety box 18, a liquid hydrogen storage tank 22, a first heat exchange box 34, a second heat exchange box 35, and an installation box 52. The two heat exchange boxes are equipped with nitrogen sealing and anti-frost components, which are used to fill the heat exchange boxes with nitrogen to maintain a slight positive pressure and isolate moisture. The heat exchange boxes are also equipped with cleaning components, which are used to clean the frost layer formed in the heat exchange boxes. The heat exchange boxes are also equipped with a vibration component, which is used to shake off the frost layer accumulated in the heat exchange boxes.

[0042] The cleaning assembly includes a cleaning frame 47, cleaning brushes 48, a second slider 49, a second slide groove 50, and a transmission mechanism. The transmission mechanism is used to drive the cleaning frame 47 to slide back and forth for cleaning. The second slide groove 50 is located at the upper end of the heat exchange box. The second slider 49 slides in the second slide groove 50. The lower end of the second slider 49 is fixedly connected to the cleaning frame 47. Several cleaning brushes 48 are arranged around the inner wall of the cleaning frame 47.

[0043] The transmission mechanism includes a wedge block 42, a slider box 43, a second spring 44, a third spring 45, a telescopic rod 46, a nut 31, a first slider 32, a first slide groove 33, and a lever block 51.

[0044] The slider box 43 is located at the lower end of the cleaning frame 47. The telescopic rod 46 is located inside the slider box 43. The wedge block 42 is fixedly connected to the telescopic end of the telescopic rod 46. One end of the third spring 45 is fixedly connected to the telescopic rod 46, and the other end is fixedly connected to the wedge block 42. One end of the second spring 44 is fixedly connected to the side wall of the slider box 43, and the other end is fixedly connected to the inner wall of the heat exchange box. The nut 31 is located below the wedge block 42. The first slide groove 33 is located at the lower end of the heat exchange box. The first slider 32 is fixedly connected to the lower end of the nut 31 and slides within the first slide groove 33. The lever 51 is located at the lower end of the heat exchange box, and its position corresponds to the wedge end of the wedge block 42.

[0045] The storage tank 5 has an exhaust pipe 6 at its lower end, and an exhaust valve 7 is fixedly connected to the exhaust pipe 6. The installation box 52 has a compressor motor 9 and a compressor 10. The output shaft of the compressor motor 9 is fixedly connected to the rotating shaft of the compressor 10. One end of the first three-way pipe 8 is fixedly connected to the exhaust pipe 6, and the other two ends are fixedly connected to the corresponding air inlets of the compressor 10. Two ends of the second three-way pipe 11 are fixedly connected to the corresponding air outlets of the compressor 10, and pressure relief valves are installed in these two ends. The remaining end of the second three-way pipe 11 is fixedly connected to a heat exchange pipe 12.

[0046] The heat exchange tube 12 is divided into two parts, which are respectively installed in the first heat exchange box 34 and the second heat exchange box 35. The two parts are fixedly connected through the side wall of the heat exchange box. One end of the heat exchange tube 12 in the second heat exchange box 35 is connected to the liquid hydrogen storage tank 22 through a liquefaction throttle valve 21. The first heat exchange box 34 and the second heat exchange box 35 are respectively provided with a first precooling tube 13 and a second precooling tube 24. The heat exchange tube 12 is fixedly connected to the corresponding precooling tube through several heat-conducting rings 14. The storage tank 2 is provided with a first air inlet 3 and a second air inlet 4. One end of the second precooling tube 24 is fixedly connected to a circulation pipe 25. The other end of the circulation pipe 25 is fixedly connected to the air inlet of the compressor 10. The other end of the second precooling tube 24 is connected to the liquid hydrogen storage tank 22 through a first pressure relief pipe 23. The first heat exchange box 34 and the second heat exchange box 35 are respectively provided with a second pressure relief pipe 36.

[0047] In this embodiment, low-pressure hydrogen gas to be stored can be introduced into the inner storage tank 5 through the second air inlet 4 on the outer storage tank 2 to complete the initial storage of hydrogen gas. The compressor motor 9 is started to drive the compressor 10 to run. The low-pressure hydrogen gas in the inner storage tank 5 enters the compressor 10 through the exhaust pipe 6, and the high-pressure hydrogen gas enters the heat exchange tube 12 through the second three-way pipe 11. It first flows through the pipe section in the first heat exchange box 34 and exchanges heat with the first pre-cooling pipe 13. The pre-cooled hydrogen gas continues to flow through the heat exchange in the second heat exchange box 35. Pipe 12, together with the second precooling pipe 24, performs deep precooling. After the high-pressure hydrogen gas is precooled by the two-stage precooling, it flows through the liquefaction throttle valve 21 and undergoes Joule-Thomson isoenthalpic expansion in the valve to achieve gas-liquid phase change and form liquid hydrogen. The liquid hydrogen enters the liquid hydrogen storage tank 22 through the pipeline for storage. The gaseous hydrogen that is not completely liquefied flows back to the second precooling pipe 24 through the first pressure relief pipe 23 to exchange heat with the subsequent high-pressure hydrogen. After recovering the cold energy, it enters the compressor 10 inlet again through the circulation pipe 25 to achieve circulating liquefaction.

[0048] Furthermore, during the hydrogen liquefaction operation, the motor 26 can be started simultaneously. When the nut 31 slides, the wedge end provided above it will form a contact transmission with the wedge block 42, driving the wedge block 42 to slide synchronously and directionally, thereby linking the cleaning frame 47 and the cleaning brush 48 mounted on the frame to move together.

[0049] During the forward sliding stroke of the wedge block 42, its side wedge structure gradually forms a pressing contact with the preset lever 51. As the sliding stroke continues, under the lateral pressing force of the lever 51, the wedge block 42 overcomes its own elastic constraint, gradually retracts, and embeds itself into the slider box 43. When the wedge block 42 is fully inserted into the slider box 43, the previously stretched second spring 44 quickly releases its elastic potential energy, generating a reverse driving force that pushes the cleaning frame 47 to quickly reset.

[0050] Through this reciprocating sliding cycle mechanism, the cleaning brush 48 achieves high-frequency reciprocating sliding. During the reciprocating motion, the brush can fully cover the outer surface of the heat exchange tube 12 and the precooling tube, efficiently removing the frost layer generated by the low temperature during liquefaction, avoiding the accumulation of frost layer affecting the heat exchange efficiency, ensuring the stability of the hydrogen liquefaction process, reducing the operating cost and downtime losses of manual defrosting, and improving the continuous operation capability and liquefaction efficiency of the unit.

[0051] Example 2:

[0052] Reference Figure 5 , Figure 8The nitrogen sealing anti-frost assembly includes an inlet pipe 15, an outlet pipe 16, a third three-way pipe 19, and mounting blocks 20. The inlet pipe 15 is fixedly connected to one end of the first precooling pipe 13, and the other end of the first precooling pipe 13 is fixedly connected to one end of the outlet pipe 16. The other end of the outlet pipe 16 is fixedly connected to the gas storage bag 17. A pressure relief valve is installed in one end of the third three-way pipe 19, and this end is fixedly connected to the gas storage bag 17. Two mounting blocks 20 are set at the upper end of the cleaning frame 47, and the other two ends of the third three-way pipe 19 are respectively fixedly connected to the corresponding mounting blocks.

[0053] In this embodiment, in conjunction with Embodiment 1, when high-pressure hydrogen flows through the first section of heat exchange tube 12 in the liquefaction process, a liquid nitrogen cold source can be connected to the heat exchange system through the inlet pipe. The extremely low temperature of the liquid nitrogen is used to efficiently pre-cool the high-pressure hydrogen. After the liquid nitrogen completes the heat exchange with the high-pressure hydrogen, it absorbs heat and rapidly evaporates into nitrogen gas. This evaporated nitrogen gas is discharged directionally along the outlet pipe 16 and is centrally stored in the gas storage bladder 17, thereby improving energy utilization.

[0054] The gas storage bladder 17 is equipped with a pressure relief valve inside its third three-way pipe 19, which automatically opens according to a set cycle. It is worth noting that both ends of the third three-way pipe 19 are fixed to the mounting blocks 20 on the cleaning frame 47 and slide back and forth synchronously with the cleaning frame 47. After the pressure relief valve opens, the nitrogen stored in the gas storage bladder 17 will be continuously released into the heat exchange box through the third three-way pipe, and under the reciprocating motion of the cleaning frame 47, it will be evenly diffused to all areas of the heat exchange box, gradually filling the entire heat exchange space.

[0055] The nitrogen filling the heat exchanger forms an inert gas protective layer, effectively isolating moisture from the outside air from contacting the heat exchange tubes 12 and the precooling tubes, further suppressing the formation and accumulation of frost in low-temperature environments from the source. This design, together with the defrosting function of the cleaning brush, provides dual protection, reducing the frequency of defrosting by the brush while maintaining the heat exchange efficiency of the heat exchange tubes 12 and the precooling tubes, ensuring the stable and efficient progress of the high-pressure hydrogen liquefaction process, and reducing the operating energy consumption and maintenance costs of the unit.

[0056] Example 3:

[0057] Reference Figure 10 , Figure 12 The vibration assembly includes a rack 38, a guide rod 39, a guide block 40, a first spring 41, and a drive mechanism, which drives the rack 38 to slide back and forth.

[0058] The guide rod 39 is located at the bottom of the heat exchange box, the guide block 40 slides on the guide rod 39, one end of the first spring 41 is fixedly connected to the guide block 40, and the other end is fixedly connected to the lower end of the heat exchange box, and the rack 38 is fixedly connected to the guide block 40.

[0059] The drive mechanism includes a motor 26, a first synchronous pulley 27, a second synchronous pulley 28, a synchronous belt 29, and a double-ended reciprocating screw 30. The output shaft of the motor 26 is fixedly connected to one end of the double-ended reciprocating screw 30, and the other end of the double-ended reciprocating screw 30 is rotatably connected to the side wall of the heat exchange box. The first synchronous pulley 27 and the second synchronous pulley 28 are respectively fixedly connected to the corresponding double-ended reciprocating screws. The two synchronous pulleys are connected by transmission through the synchronous belt 29, and the nut 31 slides on the double-ended reciprocating screw 30.

[0060] In this embodiment, combined with embodiments one and two, while the double-headed reciprocating screw 30 is driven to rotate, the missing gear 37, which is coaxially linked with it, rotates synchronously. During the rotation of the missing gear, it forms an intermittent meshing transmission with the rack 38. When the teeth of the missing gear mesh with the rack 38, it drives the rack to slide smoothly downward along the guide rod 39. During this process, the first spring 41 at the lower end of the rack 38 is gradually compressed, continuously storing elastic potential energy.

[0061] When the missing tooth gear 37 rotates to the missing tooth area, its meshing with the rack 38 disengages, and the rack 38 loses its transmission constraint. At this time, the compressed first spring 41 quickly releases its stored elastic potential energy, generating an upward reset driving force, which drives the rack 38 to slide upward and reset quickly. Through this cyclic mechanism, the rack achieves high-frequency reciprocating sliding.

[0062] During the upward sliding motion of rack 38, the striking part at its upper end creates a regular knocking vibration on the outer wall of the pipe. This controllable vibration force can efficiently shake off the frost layer that has condensed on the pipe surface, preventing the frost layer from thickening and affecting the heat exchange efficiency. It complements the functions of inert gas anti-frost and brush defrosting, ensuring the stable and efficient operation of the hydrogen liquefaction unit.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hydrogen supply and storage device and method, comprising a mounting frame (1), an outer storage tank (2), an inner storage tank (5), a safety box (18), a liquid hydrogen storage tank (22), a first heat exchange box (34), a second heat exchange box (35), and an installation box (52), characterized in that, The two heat exchange boxes are equipped with nitrogen sealing and anti-frost components, which are used to fill the heat exchange boxes with nitrogen to maintain a slight positive pressure and isolate moisture. The heat exchange boxes are also equipped with cleaning components, which are used to clean the frost layer formed in the heat exchange boxes. The heat exchange boxes are also equipped with knocking components, which are used to shake off the frost layer accumulated in the heat exchange boxes. The cleaning assembly includes a cleaning frame (47), cleaning brushes (48), a second slider (49), a second slide groove (50), and a transmission mechanism. The transmission mechanism is used to drive the cleaning frame (47) to slide back and forth for cleaning. The second slide groove (50) is located at the upper end of the heat exchange box. The second slider (49) slides in the second slide groove (50). The lower end of the second slider (49) is fixedly connected to the cleaning frame (47). Several cleaning brushes (48) are arranged around the inner wall of the cleaning frame (47).

2. The hydrogen supply and storage device according to claim 1, characterized in that, The transmission mechanism includes a wedge block (42), a slider box (43), a second spring (44), a third spring (45), a telescopic rod (46), a nut (31), a first slider (32), a first slide groove (33), and a lever (51).

3. A hydrogen supply and storage device according to claim 2, characterized in that, The slider box (43) is located at the lower end of the cleaning frame (47). The telescopic rod (46) is located inside the slider box (43). The wedge block (42) is fixedly connected to the telescopic end of the telescopic rod (46). One end of the third spring (45) is fixedly connected to the telescopic rod (46), and the other end is fixedly connected to the wedge block (42). One end of the second spring (44) is fixedly connected to the side wall of the slider box (43), and the other end is fixedly connected to the inner wall of the heat exchange box. The nut (31) is located below the wedge block (42). The first slide groove (33) is located at the lower end of the heat exchange box. The first slider (32) is fixedly connected to the lower end of the nut (31) and slides in the first slide groove (33). The pusher block (51) is located at the lower end of the heat exchange box, and its position corresponds to the wedge end of the wedge block (42).

4. A hydrogen supply and storage device according to claim 3, characterized in that, The vibration assembly includes a rack (38), a guide rod (39), a guide block (40), a first spring (41), and a drive mechanism, which drives the rack (38) to slide back and forth.

5. A hydrogen supply and storage device according to claim 4, characterized in that, The guide rod (39) is located at the bottom of the heat exchange box, the guide block (40) slides on the guide rod (39), one end of the first spring (41) is fixedly connected to the guide block (40), and the other end is fixedly connected to the lower end of the heat exchange box. The rack (38) is fixedly connected to the guide block (40).

6. A hydrogen supply and storage device according to claim 5, characterized in that, The drive mechanism includes a motor (26), a first synchronous pulley (27), a second synchronous pulley (28), a synchronous belt (29), and a double-ended reciprocating screw (30). The output shaft of the motor (26) is fixedly connected to one end of the double-ended reciprocating screw (30), and the other end of the double-ended reciprocating screw (30) is rotatably connected to the side wall of the heat exchange box. The first synchronous pulley (27) and the second synchronous pulley (28) are respectively fixedly connected to the corresponding double-ended reciprocating screw. The two synchronous pulleys are connected by a synchronous belt (29). The nut (31) slides on the double-ended reciprocating screw (30).

7. A hydrogen supply and storage device according to claim 6, characterized in that, The storage tank (5) is provided with an exhaust pipe (6) at the lower end. An exhaust valve (7) is fixedly connected to the exhaust pipe (6). The installation box (52) is provided with a compressor motor (9) and a compressor (10). The output shaft of the compressor motor (9) is fixedly connected to the rotating shaft of the compressor (10). One end of the first three-way pipe (8) is fixedly connected to the exhaust pipe (6), and the other two ends are fixedly connected to the air inlet of the corresponding compressor (10). Two ends of the second three-way pipe (11) are fixedly connected to the air outlet of the corresponding compressor (10), and a pressure relief valve is provided in the two ends. The remaining end of the second three-way pipe (11) is fixedly connected to a heat exchange pipe (12).

8. A hydrogen supply and storage device according to claim 7, characterized in that, The heat exchange tube (12) is divided into two parts, which are respectively installed in the first heat exchange box (34) and the second heat exchange box (35). The two parts are fixedly connected through the side wall of the heat exchange box. The end of the heat exchange tube (12) located in the second heat exchange box (35) is connected to the liquid hydrogen storage tank (22) through a liquefaction throttle valve (21). The first heat exchange box (34) and the second heat exchange box (35) are respectively provided with a first precooling tube (13) and a second precooling tube (24). The heat exchange tube (12) is fixedly connected to the corresponding precooling tube through several heat-conducting rings (14). The storage outer tank (2) is provided with a first air inlet (3) and a second air inlet (4). One end of the second precooling pipe (24) is fixedly connected to a circulation pipe (25), and the other end of the circulation pipe (25) is fixedly connected to the air inlet of the compressor (10). The other end of the second precooling pipe (24) is connected to the liquid hydrogen storage tank (22) through a first pressure relief pipe (23). The first heat exchange box (34) and the second heat exchange box (35) are respectively provided with second pressure relief pipes (36).

9. A hydrogen supply and storage device according to claim 8, characterized in that, The nitrogen sealing anti-frost assembly includes an inlet pipe (15), an outlet pipe (16), a third three-way pipe (19), and mounting blocks (20). The inlet pipe (15) is fixedly connected to one end of the first precooling pipe (13), and the other end of the first precooling pipe (13) is fixedly connected to one end of the outlet pipe (16). The other end of the outlet pipe (16) is fixedly connected to the gas storage bag (17). A pressure relief valve is provided in one end of the third three-way pipe (19), and this end is fixedly connected to the gas storage bag (17). The two mounting blocks (20) are set at the upper end of the cleaning frame (47), and the other two ends of the third three-way pipe (19) are fixedly connected to the corresponding mounting blocks.

10. The energy storage method of a hydrogen supply and storage device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Hydrogen introduction: Low-pressure hydrogen to be stored is introduced into the inner storage tank (5) through the second air inlet (4) on the outer storage tank (2) to complete the initial storage of hydrogen. S2. Hydrogen compression, start the compressor motor (9) to drive the compressor (10) to run, and the low-pressure hydrogen in the storage tank (5) enters the compressor (10) through the exhaust pipe (6). S3. Heat exchange and precooling: High-pressure hydrogen enters the heat exchange tube (12) through the second three-way pipe (11), first flows through the pipe section in the first heat exchange box (34), and exchanges heat with the first precooling tube (13); the precooled hydrogen continues to flow through the heat exchange tube (12) in the second heat exchange box (35), and undergoes deep precooling with the second precooling tube (24); S4, Liquid storage: After being pre-cooled by two stages, the high-pressure hydrogen gas flows through the liquefaction throttle valve (21) and undergoes Joule-Thomson isoenthalpic expansion within the valve to achieve gas-liquid phase change and form liquid hydrogen. S5. Reflux compression: Liquid hydrogen enters the liquid hydrogen storage tank (22) through the pipeline for storage. The gaseous hydrogen that is not completely liquefied flows back to the second precooling pipe (24) through the first pressure relief pipe (23) to exchange heat with the subsequent high-pressure hydrogen. After recovering the cold energy, it enters the compressor (10) inlet again through the circulation pipe (25) to achieve cyclic liquefaction.

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