Magnesium-based hydrogen storage material gas delivery system

Abstract

The invention aims to disclose a magnesium-based hydrogen storage material gas delivery system, which relates to the technical field of magnesium-based hydrogen storage material delivery, and comprises an argon delivery end, a hydrogen storage material generation bin, a material receiving tank, a first filtering system and an argon recovery system, a safety valve, a safety gas circuit and a second filtering system are arranged at the top of the hydrogen storage material generating bin; the argon conveying end is provided with a first gas path, a second gas path and a third gas path, and the first gas path is a long-flow gas path and continuously supplies argon to the safety gas path; the second gas path inputs argon to the top of the hydrogen storage material generation bin and serves as a pressure source; the third gas path is provided with a high-frequency switch valve and intermittently supplies argon to the conveying pipeline; the technical effects are as follows: the first gas path is a long-flow gas path, so that the risk caused by reverse inflow of external gas is prevented; the third gas path supplies gas to the conveying pipeline in an intermittent manner, and flushes the hydrogen storage material accumulated in the conveying pipeline to avoid blockage; the second gas path inputs argon to the top of the hydrogen storage material generation bin and serves as a pressure source.

Description

Technical Field

[0001] The present invention relates to the technical field of magnesium-based hydrogen storage material transportation, and particularly to a gas transportation system for magnesium-based hydrogen storage materials. Background Art

[0002] Hydrogen energy has both energy and material dual attributes and plays a bridging role in the grand goal of carbon peaking and carbon neutrality. Hydrogen energy has been incorporated into the national energy strategic deployment. Magnesium-based hydrogen storage materials, such as magnesium hydride, have wide raw material sources and are easy to store and transport safely, becoming one of the main materials for solid-state hydrogen storage. In the large-scale production process of magnesium hydride, how to transport the flammable and explosive magnesium hydride is a technical problem that needs to be overcome.

[0003] In view of this, it is necessary to develop a gas transportation system for magnesium-based hydrogen storage materials. Summary of the Invention

[0004] To solve the above technical problems, the purpose of the present invention is to disclose a gas transportation system for magnesium-based hydrogen storage materials.

[0005] To achieve the above invention purpose, the present invention provides a gas transportation system for magnesium-based hydrogen storage materials, including an argon gas transportation end, a hydrogen storage material generation bin, a receiving tank, a first filtration system, and an argon gas recovery system; The gas overflowing from the receiving tank enters the argon gas recovery system after passing through the first filtration system; Both ends of the transportation pipeline are respectively connected to the bottom of the hydrogen storage material generation bin and the top of the receiving tank; A safety valve, a safety gas path, and a second filtration system are arranged at the top of the hydrogen storage material generation bin. The gas overflowing from the safety valve is sent to the second filtration system through the safety gas path, and the second filtration system is connected to the atmosphere; The argon gas transportation end is provided with a first gas path, a second gas path, and a third gas path. The first gas path is a long-flow gas path and continuously supplies argon gas to the safety gas path; The second gas path inputs argon gas to the top of the hydrogen storage material generation bin and serves as a pressure source; The third gas path is provided with a high-frequency switching valve and intermittently supplies argon gas to the transportation pipeline; The bottom of the hydrogen storage material generation bin is a conical part, the cone angle of the conical part is 30° - 37°, and a vibrator is arranged on the outer wall of the conical part.

[0006] Preferably, the air pressure in the hydrogen storage material generation bin is 0.1 MPa - 0.8 MPa.

[0007] Preferably, the air pressure in the receiving tank is 10 kPa - 80 kPa.

[0008] Preferably, a balance valve is further provided at the top of the hydrogen storage material reaction chamber, and the gas overflowing from the balance valve is introduced into the safety gas path.

[0009] Preferably, the conveying pipeline has a plurality of elbow portions, and the bending radius of the elbow portion is at least 10 times the radius of the elbow portion.

[0010] Preferably, the first filtration system is above the receiving tank, and the magnesium-based hydrogen storage material intercepted by the first filtration system flows back to the receiving tank under the action of gravity.

[0011] Preferably, the argon recovery system includes a low-pressure gas storage tank, a third filtration system, a compressor, a cold dryer, and a high-pressure gas storage tank, and the high-pressure gas storage tank is introduced into the argon delivery end through a recovery gas path.

[0012] Preferably, the argon discharged from the first filtration system sequentially passes through the low-pressure gas storage tank, the third filtration system, the compressor, the cold dryer, the high-pressure gas storage tank, and the recovery gas path.

[0013] Preferably, the air pressure of the low-pressure gas storage tank is lower than that of the first filtration system; The air pressure of the high-pressure gas storage tank is 0.5 MPa - 1.2 MPa, and the temperature of the argon in the high-pressure gas storage tank is 25°C - 40°C.

[0014] Preferably, an oxygen content analyzer, a water vapor content analyzer, and an evacuation valve are provided at the air outlet of the first filtration system.

[0015] Compared with the prior art, the technical effects of the present invention are as follows: (1) The first gas path, the second gas path, and the third gas path are three branches of the argon delivery end. The first gas path is a long-flow gas path and continuously supplies argon to the safety gas path, so that the safety gas path is always filled with positive-pressure argon, preventing the risk of reverse inflow of external gas; the third gas path supplies gas to the conveying pipeline in an intermittent manner, and the high-frequency switching valve controls the third gas path in a state of opening for 0.5 s and closing for 0.5 s, and the accumulated hydrogen storage material in the conveying pipeline is flushed through the third gas path to avoid blockage; the second gas path inputs argon to the top of the hydrogen storage material reaction chamber and serves as a pressure source, and the hydrogen storage powder material is conveyed through the pressure difference between the hydrogen storage material reaction chamber and the receiving tank.

[0016] (2) A safety valve, a safety gas path, and a second filtration system are provided at the top of the hydrogen storage material reaction chamber. When the pressure in the hydrogen storage material reaction chamber exceeds the threshold, the safety valve automatically opens and discharges the mixture of argon and hydrogen storage material to the safety gas path, and the second filtration system intercepts the hydrogen storage material in the mixture to prevent it from being discharged into the atmosphere.

[0017] (3)The bottom of the hydrogen storage material generation bin is a conical part with a cone angle of 30°-37°, and a vibrator is arranged on the outer wall of the conical part. This design effectively prevents the hydrogen storage material from accumulating and sticking to the wall in the conical part, and can ensure the normal transportation of the hydrogen storage material. Brief Description of the Drawings

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the working principle of the magnesium-based hydrogen storage material gas transportation system of the present invention.

[0020] Among them, 1. Argon gas transportation end; 11. First gas path; 12. Second gas path; 13. Third gas path; 131. High-frequency switching valve; 14. Liquid argon tank; 15. Argon gas vaporization tank; 16. Fresh argon gas tank; 2. Hydrogen storage material generation bin; 21. Safety valve; 22. Safety gas path; 23. Second filtration system; 231. Bleed valve; 24. Conical part; 25. Balance valve; 3. Receiving tank; 4. First filtration system; 41. Gas outlet; 42. Oxygen content analyzer; 43. Water vapor content analyzer; 44. Drain valve; 5. Argon gas recovery system; 51. Low-pressure gas storage tank; 52. Third filtration system; 53. Compressor; 54. Refrigerated dryer; 55. High-pressure gas storage tank; 56. Recovery gas path; 6. Transportation pipeline; 61. Elbow part. Specific Embodiments

[0021] The present invention will be described in detail below in conjunction with the embodiments shown in the drawings. However, it should be noted that these embodiments are not limitations of the present invention. Any equivalent transformation or substitution in function, method, or structure made by those of ordinary skill in the art based on these embodiments belongs to the protection scope of the present invention.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] Example 1, see Figure 1 As shown, this example discloses a specific implementation of a gas delivery system for magnesium-based hydrogen storage materials (hereinafter referred to as the "delivery device").

[0024] For the gas delivery system for magnesium-based hydrogen storage materials, see Figure 1 As shown, it includes an argon delivery end 1, a hydrogen storage material reaction chamber 2, a receiving tank 3, a first filtration system 4, and an argon recovery system 5; the gas overflowing from the receiving tank 3 enters the argon recovery system 5 after passing through the first filtration system 4; both ends of the delivery pipeline 6 are respectively connected to the bottom of the hydrogen storage material reaction chamber 2 and the top of the receiving tank 3; a safety valve 21, a safety gas path 22, and a second filtration system 23 are provided at the top of the hydrogen storage material reaction chamber 2, the gas overflowing from the safety valve 21 is sent to the second filtration system 23 after passing through the safety gas path 22, the second filtration system 23 is provided with a vent valve 231 and is connected to the atmosphere; the argon delivery end 1 is provided with a first gas path 11, a second gas path 12, and a third gas path 13, the first gas path 11 is a long-flow gas path and continuously supplies argon to the safety gas path 22; the second gas path 12 inputs argon to the top of the hydrogen storage material reaction chamber 2 and serves as a pressure source; the third gas path 13 is provided with a high-frequency switching valve 131 and intermittently supplies argon to the delivery pipeline 6; the bottom of the hydrogen storage material reaction chamber 2 is a conical part 24, the cone angle of the conical part 24 is 30° - 37°, and a vibrator is provided on the outer wall of the conical part 24.

[0025] Specifically, see Figure 1, the liquid argon tank 14 supplies argon to the fresh argon tank 16 after passing through the argon gasification tank 15. The argon delivery end 1 is supplied with fresh argon from the fresh argon tank 16. The argon delivery end 1 is provided with three branches, namely the first gas path 11, the second gas path 12 and the third gas path 13. There is hydrogen storage powder material, such as magnesium hydride particles, in the hydrogen storage material generation bin 2. The purpose of this embodiment is to send the hydrogen storage powder material in the hydrogen storage material generation bin 2 into the receiving tank 3 through pressure difference and recover argon through the argon recovery system 5 to realize the recycling of argon. The first gas path 11 is a long-flow gas path and continuously supplies argon to the safety gas path 22, so that the safety gas path 22 is always filled with positive-pressure argon, preventing external gas from flowing back into the hydrogen storage material generation bin 2 and causing risks. The third gas path 13 supplies gas to the conveying pipeline 6 in an intermittent manner. The high-frequency switching valve 131 controls the third gas path 13 in a state of opening for 0.5 s and closing for 0.5 s. Through the third gas path 13, the hydrogen storage material accumulated in the conveying pipeline 6 is flushed to avoid blockage, and the conveying efficiency of the conveying pipeline 6 reaches 50 kg / min - 500 kg / min. The second gas path 12 inputs argon to the top of the hydrogen storage material generation bin 2 and serves as a pressure source, and conveys the hydrogen storage powder material through the pressure difference between the hydrogen storage material generation bin 2 and the receiving tank 3. The air pressure in the hydrogen storage material generation bin 2 is 0.1 MPa - 0.8 MPa, and the air pressure in the receiving tank 3 is 10 kPa - 80 kPa. A balance valve 25 is also provided at the top of the hydrogen storage material generation bin 2, and the gas overflowing from the balance valve 25 is introduced into the safety gas path 22. The purpose of the balance valve 25 is to adjust or stabilize the pressure in the hydrogen storage material generation bin 2. A safety valve 21, a safety gas path 22 and a second filtration system 23 are provided at the top of the hydrogen storage material generation bin 2. When the pressure in the hydrogen storage material generation bin 2 exceeds the threshold value, the safety valve 21 automatically opens and discharges the mixture of argon and hydrogen storage material to the safety gas path 22. The second filtration system 23 intercepts the hydrogen storage material in the mixture to prevent it from being discharged into the atmosphere to prevent the hydrogen storage material from accumulating in the atmosphere and generating combustion and explosion risks. The bottom of the hydrogen storage material generation bin 2 is a conical part 24 with a cone angle of 30° - 37°, and a vibrator is provided on the outer wall of the conical part 24. This design effectively prevents the hydrogen storage material from accumulating and sticking to the wall in the conical part 24 and can ensure the normal conveying of the hydrogen storage material. It should be noted that the air pressure values mentioned in this embodiment are all the pressures shown on the pressure gauge.

[0026] See Figure 1 , the conveying pipeline 6 has a number of elbow parts 61, and the bending radius of the elbow parts 61 is at least 10 times the radius of the elbow parts. When high-pressure gas conveys the hydrogen storage powder material, the resistance caused by the elbow parts 61 with a large bending radius is small, avoiding the blockage of the elbow parts 61 by the hydrogen storage powder material. To further prevent the blockage of the elbow parts 61, a high-frequency vibrator is provided on the outer wall of the elbow parts 61, which can shake off the powder adhering to the inner wall of the elbow parts 61 at any time.

[0027] See Figure 1 The first filtration system 4 is above the material receiving tank 3. The first filtration system 4 is located at a higher position. The magnesium-based hydrogen storage material intercepted by the first filtration system 4 flows back to the material receiving tank 3 under the action of gravity. The air pressure in the material receiving tank 3 is 10 kPa - 80 kPa, and the air pressure of the first filtration system 4 is slightly lower than that of the material receiving tank 3. The material receiving tank 3 maintains a slightly positive pressure on the first filtration system 4, so that most of the hydrogen storage material falls into the material receiving tank 3, and a small part of the hydrogen storage material is transported to the first filtration system 4 along with argon and then intercepted and flows back to the material receiving tank 3.

[0028] See Figure 1 The working principle of the argon recovery system 5 is as follows: The argon recovery system 5 includes a low-pressure gas storage tank 51, a third filtration system 52, a compressor 53, a cold dryer 54 and a high-pressure gas storage tank 55. The high-pressure gas storage tank 55 is connected to the argon delivery end 1 through a recovery gas path 56. The air pressure of the low-pressure gas storage tank 51 is lower than that of the first filtration system 4. The argon discharged from the first filtration system 4 successively passes through the low-pressure gas storage tank 51, the third filtration system 52, the compressor 53, the cold dryer 54, the high-pressure gas storage tank 55 and the recovery gas path 56. The low-pressure argon generated by the first filtration system 4 enters the low-pressure gas storage tank 51, and then further removes the hydrogen storage material through the third filtration system 52, is pressurized by the compressor 53 and then enters the cold dryer 54. The cold dryer 54 cools the argon heated by friction during transportation to 25°C - 40°C. The air pressure of the high-pressure gas storage tank is 0.5 MPa - 1.2 MPa, and the temperature of the argon in the high-pressure gas storage tank is 25°C - 40°C. To prevent the recycled argon from containing excessive oxygen and moisture, an oxygen content analyzer 42, a water vapor content analyzer 43 and a vent valve 44 are provided at the air outlet 41 of the first filtration system 4. Once the oxygen content analyzer 42 senses that the oxygen content in the argon exceeds 2000 ppm, and / or the water vapor content analyzer 43 senses that the water vapor content in the argon exceeds 2000 ppm, the vent valve 44 will be opened to directly vent the argon discharged from the first filtration system 4 and no longer enter the low-pressure gas storage tank 51. For safety, oxygen content analyzers and water vapor content analyzers are also provided in the hydrogen storage material generation bin 2 and the material receiving tank 3 to monitor the moisture and oxygen content in the hydrogen storage material generation bin 2 and the material receiving tank 3 in real time.

[0029] It should be further noted that the hydrogen storage material generation bin 2, the receiving tank 3, the first filtration system 4, the second filtration system 4, and the third filtration system 52 are respectively provided with an argon inlet and an argon replacement port. Before using the conveying system, the oxygen and water vapor in the hydrogen storage material generation bin 2, the receiving tank 3, the first filtration system 4, the second filtration system 4, and the third filtration system 52 are all replaced with argon through the argon inlet and the argon replacement port respectively. The water vapor content shall not exceed 2000 ppm, and the oxygen content shall not exceed 2000 ppm. In addition, a backwashing mechanism is also provided in the first filtration system 4, the second filtration system 4, and the third filtration system 52. When the pressure difference before and after filtration of the first filtration system 4, the second filtration system 4, and the third filtration system 52 reaches 200 Pa, the backwashing mechanism is started to reduce the filtration resistance.

Claims

1. A magnesium-based hydrogen storage material gas delivery system, characterized in that: It includes an argon gas delivery end, a hydrogen storage material generating chamber, a material receiving tank, a first filtering system and an argon gas recovery system; The gas overflowing from the receiving tank passes through the first filtering system and then enters the argon recovery system; The two ends of the delivery pipeline are respectively connected to the bottom of the hydrogen storage material generating bin and the top of the receiving tank; A safety valve, a safety gas circuit and a second filter system are arranged on the top of the hydrogen storage material generating bin, and the gas overflowing from the safety valve is sent to the second filter system through the safety gas circuit, and the second filter system is connected to the atmosphere; The argon gas delivery end is provided with a first gas path, a second gas path and a third gas path, wherein the first gas path is a long-flow gas path and continuously supplies argon gas to the safety gas path; The second gas path inputs argon gas to the top of the hydrogen storage material generating chamber and serves as a pressure source; The third gas circuit is provided with a high-frequency switch valve and intermittently supplies argon gas to the delivery pipeline; The bottom of the hydrogen storage material generating chamber is a conical portion, the cone angle of the conical portion is 30°-37°, and a vibrator is arranged on the outer wall of the conical portion.

2. The magnesium-based hydrogen storage material gas delivery system according to claim 1, characterized in that: The gas pressure of the hydrogen storage material generating chamber is 0.1MPa-0.8MPa.

3. The magnesium-based hydrogen storage material gas delivery system according to claim 1, characterized in that: The air pressure of the receiving tank is 10kPa-80kPa.

4. The magnesium-based hydrogen storage material gas delivery system according to claim 1, characterized in that: A balancing valve is also arranged on the top of the hydrogen storage material generating chamber, and the gas overflowing from the balancing valve is introduced into the safety gas path.

5. The magnesium-based hydrogen storage material gas delivery system according to claim 1, characterized in that: The conveying pipeline has a plurality of curved pipe portions, and the bending radius of the curved pipe portions is at least 10 times the radius of the curved pipe portions.

6. The magnesium-based hydrogen storage material gas delivery system according to any one of claims 1 to 5, characterized in that: The first filtering system is above the receiving tank, and the magnesium-based hydrogen storage material intercepted by the first filtering system flows back to the receiving tank under the action of gravity.

7. The magnesium-based hydrogen storage material gas delivery system according to claim 6, characterized in that: The argon gas recovery system includes a low-pressure gas storage tank, a third filtering system, a compressor, a cold dryer and a high-pressure gas storage tank, and the high-pressure gas storage tank is connected to the argon gas delivery end through a recovery gas path.

8. The magnesium-based hydrogen storage material gas delivery system according to claim 6, characterized in that: The argon gas discharged from the first filtering system passes through the low-pressure gas storage tank, the third filtering system, the compressor, the cold dryer, the high-pressure gas storage tank and the recovery gas line in sequence.

9. The magnesium-based hydrogen storage material gas delivery system according to claim 8, characterized in that: The air pressure of the low-pressure air storage tank is lower than the air pressure of the first filtering system; The gas pressure of the high-pressure gas storage tank is 0.5MPa-1.2MPa, and the temperature of the argon gas in the high-pressure gas storage tank is 25°C-40°C.

10. The magnesium-based hydrogen storage material gas delivery system according to claim 8, characterized in that: The air outlet of the first filtering system is provided with an oxygen content analyzer, a water vapor content analyzer and an exhaust valve.

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