A hydrogen storage system for methanol hydrogen generator

Abstract

The utility model discloses a kind of hydrogen storage systems of methanol hydrogen production machine, including reaction bucket, gas pump and hydrogen storage tank, further including filter device, reaction bucket, filter device, gas pump and hydrogen storage tank are sequentially connected with pipe;Inflating connection valve for connecting inert gas is provided on reaction bucket, drying assembly and filter assembly are provided in filter device, first exhaust valve and second exhaust valve are provided on hydrogen storage tank, nitrogen detector is embedded in first exhaust valve, oxygen detector is embedded in second exhaust valve.The utility model is connected with inert gas by the inflating connection valve of reaction bucket setting, and air in equipment cavity is efficiently discharged by second exhaust valve, while impurities in hydrogen are intercepted by setting filter device, moisture doped in hydrogen is fully adsorbed, and the purity of hydrogen is effectively improved;By setting pressure relief valve on the upper end of hydrogen storage tank, when pressure in tank exceeds standard, it is automatically pressure-relieved, ensure that pressure in tank is in safe range, effectively improve the safety of hydrogen storage tank.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production and storage technology, specifically a methanol-to-hydrogen generator hydrogen storage system. Background Technology

[0002] Hydrogen energy, as a clean and efficient energy carrier, plays a vital role in the energy transition. Methanol reforming for hydrogen production has become a research hotspot in the field due to its advantages such as wide availability of raw materials, convenient storage and transportation, and high hydrogen production efficiency. The hydrogen storage system, as a core component of the methanol-to-hydrogen generator, directly affects the overall operating efficiency of the hydrogen production system in terms of its safety, stability, and energy efficiency.

[0003] In the prior art, utility model patent with patent number CN202321735849.4 discloses a hydrogen generator capable of rapid hydrogen storage. The generator includes a reaction chamber with an exhaust port on one side of the top. An oxygen removal chamber is welded to the top of the reaction chamber and above the exhaust port. The interior of the oxygen removal chamber is fitted with reaction mesh plates by screws. A connecting pipe is threaded into the top of one side of the oxygen removal chamber. A gas pump is welded to the other end of the connecting pipe. A gas pump housing is bolted to the outside of the gas pump. The other end of the gas pump extends through the gas pump housing via a welded connecting pipe and is threaded into a hydrogen storage tank.

[0004] The hydrogen generator provided by the aforementioned patent can quickly move the generated hydrogen to the interior of the hydrogen storage tank using a gas pump, achieving rapid storage and improved efficiency. However, during the hydrogen production process, not only will the hydrogen contain moisture, but the air in the empty spaces of the hydrogen storage and production equipment will also mix with the hydrogen, resulting in a decrease in hydrogen purity and affecting the quality of hydrogen production and subsequent application performance. Utility Model Content

[0005] The purpose of this invention is to provide a hydrogen storage system for a methanol-to-hydrogen generator, which aims to improve the problems of hydrogen being easily mixed with moisture and the inability to effectively expel air from the equipment cavity during existing hydrogen storage, resulting in a decrease in hydrogen purity and thus affecting the quality of hydrogen production and subsequent application performance.

[0006] This utility model is implemented as follows: A methanol-to-hydrogen generator hydrogen storage system includes a reaction tank, a gas pump, and a hydrogen storage tank, as well as a filtration device. The reaction tank, filtration device, gas pump, and hydrogen storage tank are sequentially connected by pipes. The reaction tank is equipped with a gas filling valve for connecting an inert gas. The filtration device contains a drying component and a filtration component. The hydrogen storage tank is equipped with a first exhaust valve and a second exhaust valve. A nitrogen detector is embedded in the first exhaust valve, and an oxygen detector is embedded in the second exhaust valve.

[0007] Preferably, the filter device is provided with a first shell, a second shell and a third shell from top to bottom, and the first shell, the second shell and the third shell are sealed together.

[0008] Preferably, a first mounting platform is provided in one section of the housing, and the filter assembly is mounted on the lower end face of the first mounting platform.

[0009] Preferably, the filter assembly includes filter mesh tubes, and a plurality of filter mesh tubes are disposed on the filter assembly.

[0010] Preferably, a second mounting platform is provided in the two-section housing, and the drying component is mounted on the lower end face of the second mounting platform.

[0011] Preferably, an air inlet is provided on the first section of the shell, which is connected to the reaction vessel, and an air outlet is provided on the second section of the shell, which is connected to a gas pump; the hydrogen gas generated in the reaction vessel passes sequentially through the air inlet, the filter assembly, the drying assembly, and the air outlet.

[0012] Preferably, the reaction vessel further includes an exhaust valve, and the air inlet of the air pump is connected to the exhaust valve.

[0013] Preferably, it also includes a pressure relief valve, which is provided at the upper end of the hydrogen storage tank.

[0014] Preferably, the side end of the hydrogen storage tank is provided with an air inlet connection valve, and the outlet end of the gas pump is connected to the air inlet connection valve.

[0015] Preferably, the first vent valve is located at the upper end of the hydrogen storage tank, and the second vent valve is located at the lower end of the hydrogen storage tank.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model introduces inert gas through the gas filling connection valve of the reaction tank and efficiently discharges the air in the equipment cavity through the second exhaust valve. At the same time, it intercepts impurities in hydrogen and fully adsorbs the moisture mixed in the hydrogen, thereby effectively improving the purity of hydrogen.

[0017] 2. This utility model, by installing a pressure relief valve at the upper end of the hydrogen storage tank, can automatically release pressure when the pressure inside the tank exceeds the standard, ensuring that the pressure inside the tank is within a safe range, thereby effectively improving the safety of the hydrogen storage tank and effectively reducing the risk of high-pressure hydrogen storage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall connection structure of this utility model; Figure 2 This is a schematic diagram of the structure of one section of the shell of this utility model; Figure 3This is a schematic diagram of the two-section shell structure of this utility model; Figure 4 This is a schematic diagram of the three-section shell structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of a section of the shell of this utility model; Figure 6 This is a schematic diagram of the structure of the drying component of this utility model; Figure 7 This is a schematic diagram of the structure of the filter assembly of this utility model.

[0019] In the diagram: 1. Reaction vessel; 101. Gas filling connection valve; 102. Gas outlet connection valve; 2. Filter device; 201. First stage shell; 202. Second stage shell; 203. Third stage shell; 204. Gas inlet; 205. First mounting platform; 206. Gas outlet; 207. Second mounting platform; 208. Drying assembly; 209. Filter assembly; 210. Filter screen; 3. Gas pump; 4. Hydrogen storage tank; 401. Gas inlet connection valve; 5. Pressure relief valve; 6. First exhaust valve; 7. Second exhaust valve; 8. Oxygen detector. Detailed Implementation

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1

[0022] like Figure 1 , Figure 6 and Figure 7As shown, a methanol-to-hydrogen generator hydrogen storage system includes a reaction tank 1, a gas pump 3, and a hydrogen storage tank 4, as well as a filter device 2. The reaction tank 1, filter device 2, gas pump 3, and hydrogen storage tank 4 are sequentially connected by pipes. It is integrally stamped from 304 stainless steel, with a tank wall thickness of 8-12mm, an inner diameter of 500-800mm, and a height of 1000-1500mm. It is suitable for the low-to-medium temperature reaction environment (180-250℃) of methanol steam reforming for hydrogen production, and possesses corrosion resistance, high-temperature resistance, and pressure resistance. (Design pressure ≥ 1.6 MPa); The gas pump 3 adopts a diaphragm structure, model GD-50 / 35, with an exhaust pressure of up to 35 MPa, suitable for high-pressure hydrogen storage requirements. The reaction tank 1 is equipped with an inert gas charging connection valve 101. The filter device 2 contains a drying component 208 and a filter component 209. The hydrogen storage tank 4 is equipped with a first exhaust valve 6 and a second exhaust valve 7. A nitrogen detector is embedded in the first exhaust valve 6, and an oxygen detector is embedded in the second exhaust valve 7. An inlet connection valve 401 is located on the side of the hydrogen storage tank 4, and the outlet of the gas pump 3 is connected to the inlet connection valve 401. The first exhaust valve 6 is located at the upper end of the hydrogen storage tank 4, and the second exhaust valve 7 is located at the lower end of the hydrogen storage tank 4. In addition, a pressure relief valve 5 is also included. The upper end of the hydrogen storage tank 4 is equipped with a pressure relief valve 5. The pressure relief valve 5 is an emergency pressure relief valve, which is located at the top of the hydrogen storage tank 4. When the pressure inside the hydrogen storage tank 4 exceeds the maximum bearing value of the pressure relief valve 5, the pressure relief valve 5 will automatically release pressure, thereby ensuring that the pressure inside the hydrogen storage tank 4 is always within a safe range. The pressure relief valve 5 is made of 316L stainless steel, with a nominal diameter of DN25, a rated pressure of 40MPa, and a set pressure relief of 38MPa (adjustable ±0.5MPa). Its pressure relief capacity is ≥0.5m³ / min. The valve body contains a built-in valve core and spring. The spring is made of high-temperature resistant stainless steel (operating temperature -20℃~120℃) and has undergone fatigue testing (≥10,000 cycles) to ensure pressure relief reliability. The gas filling connection valve 101 is used to fill with inert gas, thereby venting air from the equipment and preventing hydrogen from mixing with air and affecting hydrogen quality. During venting, the gas pump 3 drives the gas inside the equipment to flow, slowly filling the equipment with inert gas. The inert gas used is nitrogen. Because nitrogen is less dense than air, it rises. The second exhaust valve 7 is located at the lower end of the hydrogen storage tank 4, facilitating complete venting of air. The oxygen detector in the second exhaust valve 7 can detect the oxygen content in the vented gas to determine the venting status. During hydrogen production, some of the hydrogen produced in the upstream hydrogen production process is discharged through the first exhaust valve 6. The first exhaust valve 6 can be connected to an external hydrogen treatment device (such as combustion treatment) to prevent hydrogen from polluting the environment. Since nitrogen is less dense than hydrogen, it floats on top of the hydrogen and can be discharged through the first exhaust valve 6 at the top of the hydrogen storage tank 4. The nitrogen detector in the first exhaust valve 6 detects whether the nitrogen has been completely discharged, thereby ensuring the purity of the hydrogen stored in the hydrogen storage tank.

[0023] like Figures 1-5 and Figure 7 As shown, the filter device 2 is arranged from top to bottom as a first housing 201, a second housing 202, and a third housing 203, which are sealed together. A first mounting platform 205 is provided in the first housing 201, and the filter assembly 209 is mounted on the lower end face of the first mounting platform 205. The filter assembly 209 includes filter screens 210, and a plurality of filter screens 210 are provided on the filter assembly 209. The filter assembly 209 includes a circular mounting plate (made of 304 stainless steel, 8mm thick) and several filter tubes 210. The outer diameter of the mounting plate is adapted to the positioning groove of the first mounting platform 205. There are 6-8 mounting holes (25mm in diameter) evenly distributed on the plate for assembling the filter tubes 210. The filter tubes 210 adopt a double-layer stainless steel filter structure. The outer layer is a 50μm coarse filter (304 stainless steel, 0.2mm wire diameter) and the inner layer is a 10μm fine filter (316L stainless steel, 0.1mm wire diameter). The filter is formed by folding to increase the filtration area (the filtration area of ​​a single filter tube is ≥0.02m²). The two ends of the filter tube are brazed to the mounting plate, and the weld is dense and leak-free. A second mounting platform 207 is provided in the second housing 202, and the drying assembly 208 is installed on the lower end face of the second mounting platform 207. The drying assembly 208 has a mesh on its shell to ensure gas passage. The drying assembly 208 is filled with a desiccant, specifically a 3A molecular sieve (3-5 mm particle size). An inlet 204 is located on the first shell 201, connected to the reaction vessel 1. An outlet 206 is located on the second shell 202, connected to the gas pump 3. Hydrogen gas generated in the reaction vessel 1 passes sequentially through the inlet 204, the filter assembly 209, the drying assembly 208, and the outlet 206. The reaction vessel 1 also includes an outlet connection valve 102, with the gas pump 3's inlet connected to the outlet connection valve 102. Example 2

[0024] like Figure 1 , Figure 6 and Figure 7As shown, a methanol-to-hydrogen generator hydrogen storage system includes a reaction tank 1, a gas pump 3, and a hydrogen storage tank 4, as well as a filter device 2. The reaction tank 1, filter device 2, gas pump 3, and hydrogen storage tank 4 are sequentially connected by pipes. The reaction tank 1 is equipped with a charging valve 101 for connecting an inert gas. The filter device 2 contains a drying component 208 and a filter component 209. The hydrogen storage tank 4 is equipped with a first exhaust valve 6 and a second exhaust valve 7. A nitrogen detector is embedded in the first exhaust valve 6, and an oxygen detector is embedded in the second exhaust valve 7. An inlet valve 401 is located on the side of the hydrogen storage tank 4, and the outlet of the gas pump 3 is connected to the inlet valve 401. The first exhaust valve 6 is located at the upper end of the hydrogen storage tank 4, and the second exhaust valve 7 is located at the lower end of the hydrogen storage tank 4. A pressure relief valve 5 is also included, located at the upper end of the hydrogen storage tank 4.

[0025] like Figures 1-5 and Figure 7 As shown, the filter device 2 is arranged from top to bottom as a first housing 201, a second housing 202, and a third housing 203, which are sealed together. A first mounting platform 205 is provided in the first housing 201, and a filter assembly 209 is mounted on the lower end face of the first mounting platform 205. The filter assembly 209 includes filter screens 210, and a plurality of filter screens 210 are provided on the filter assembly 209. A second mounting platform 207 is provided in the second housing 202, and a drying assembly 208 is mounted on the lower end face of the second mounting platform 207. A gas inlet 204 is provided on a first-stage shell 201, which is connected to the reaction vessel 1. A gas outlet 206 is provided on a second-stage shell 202, which is connected to the gas pump 3. The hydrogen gas generated in the reaction vessel 1 passes sequentially through the gas inlet 204, the filter assembly 209, the drying assembly 208, and the gas outlet 206. The reaction vessel 1 also includes a gas outlet connection valve 102, and the gas pump 3's inlet is connected to the gas outlet connection valve 102.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydrogen storage system for a methanol-to-hydrogen generator, comprising a reaction tank (1), a gas pump (3), and a hydrogen storage tank (4), characterized in that, It also includes a filter device (2), and the reaction tank (1), filter device (2), gas pump (3) and hydrogen storage tank (4) are connected in sequence by pipes; the reaction tank (1) is provided with a gas filling connection valve (101) for connecting inert gas, the filter device (2) is provided with a drying component (208) and a filter component (209) inside, and the hydrogen storage tank (4) is provided with a first exhaust valve (6) and a second exhaust valve (7), the first exhaust valve (6) is equipped with a nitrogen detector, and the second exhaust valve (7) is equipped with an oxygen detector.

2. The hydrogen storage system for a methanol-to-hydrogen generator according to claim 1, characterized in that, The filter device (2) is provided with a first shell (201), a second shell (202) and a third shell (203) from top to bottom, and the first shell (201), the second shell (202) and the third shell (203) are sealed together.

3. The hydrogen storage system for a methanol-to-hydrogen generator according to claim 2, characterized in that, A first mounting platform (205) is provided in the housing section (201), and the filter assembly (209) is installed on the lower end face of the first mounting platform (205).

4. The hydrogen storage system for a methanol-to-hydrogen generator according to claim 3, characterized in that, The filter assembly (209) includes filter tubes (210), and a plurality of filter tubes (210) are provided on the filter assembly (209).

5. A methanol-to-hydrogen generator hydrogen storage system according to claim 3, characterized in that, A second mounting platform (207) is provided in the two-section housing (202), and the drying component (208) is installed on the lower end face of the second mounting platform (207).

6. The hydrogen storage system for a methanol-to-hydrogen generator according to claim 5, characterized in that, An air inlet (204) is provided on the first section of the shell (201), and the air inlet (204) is connected to the reaction tank (1). An air outlet (206) is provided on the second section of the shell (202), and the air outlet (206) is connected to the gas pump (3). The hydrogen gas generated in the reaction tank (1) passes through the air inlet (204), the filter assembly (209), the drying assembly (208), and the air outlet (206) in sequence.

7. A methanol-to-hydrogen generator hydrogen storage system according to claim 6, characterized in that, The reaction vessel (1) also includes an exhaust valve (102), and the air inlet of the air pump (3) is connected to the exhaust valve (102).

8. The hydrogen storage system for a methanol-to-hydrogen generator according to claim 1, characterized in that, It also includes a pressure relief valve (5), which is provided at the upper end of the hydrogen storage tank (4).

9. A methanol-to-hydrogen generator hydrogen storage system according to claim 1, characterized in that, The side end of the hydrogen storage tank (4) is provided with an inlet connection valve (401), and the outlet end of the gas pump (3) is connected to the inlet connection valve (401).

10. A methanol-to-hydrogen generator hydrogen storage system according to claim 1, characterized in that, The first exhaust valve (6) is located at the upper end of the hydrogen storage tank (4), and the second exhaust valve (7) is located at the lower end of the hydrogen storage tank (4).

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