Magnesium-based solid hydrogen storage tank

Abstract

The utility model relates to the field of solid hydrogen storage, and discloses a magnesium-based solid hydrogen storage tank, and magnesium-based solid hydrogen storage materials are stored in the hydrogen storage tank. A foam metal material with heat-conducting property is filled between the magnesium-based solid hydrogen storage materials. The utility model has the beneficial effects that the system heat exchange efficiency is improved, the hydrogen charging and discharging rate is increased, the cycle life is prolonged, and the safety problem caused by excessive extrusion on the container body due to expansion of the magnesium alloy material can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the field of solid-state hydrogen storage, in particular to a magnesium-based solid-state hydrogen storage tank. Background Art

[0002] Magnesium alloy hydrogen storage materials have the advantages of high hydrogen storage capacity, low working pressure, and good safety. However, this material belongs to high-temperature hydrogen storage alloys, and the working temperature can reach more than 300 degrees Celsius. At the same time, the hydrogen charging and decharging reaction chamber is accompanied by high heat changes: when charging hydrogen, the magnesium alloy material reacts with hydrogen to generate magnesium-based hydride, while releasing heat. At this time, the reaction heat needs to be removed to prevent the temperature from rising sharply;

[0003] When releasing hydrogen, magnesium-based hydride absorbs heat and decomposes into magnesium alloy material and hydrogen, requiring the external system to continuously provide heat to maintain the reaction temperature.

[0004] Since magnesium-based hydrides have poor thermal conductivity, heat transfer and heat exchange are one of the important factors affecting the practical application of magnesium-based hydrogen storage systems. In addition, magnesium has a close-packed hexagonal crystal structure, which is one of the most compact atomic stacking structures, while magnesium-based hydrides have a tetragonal structure. The process of magnesium hydrogenation to form hydrides is accompanied by a 26-28% volume expansion. If effective measures are not taken to alleviate the stress caused by the expansion, there may be a risk of deformation of the hydrogen storage container. Utility Model Content

[0005] The purpose of the present invention is to provide a magnesium-based solid-state hydrogen storage tank to solve the technical problems existing in the prior art of low heat exchange efficiency, slow hydrogen charging and discharging speed and easy deformation of the container.

[0006] A magnesium-based solid-state hydrogen storage tank, wherein magnesium-based solid-state hydrogen storage materials are stored in the hydrogen storage tank, and foam metal materials with thermal conductivity are filled between the magnesium-based solid-state hydrogen storage materials.

[0007] Furthermore, the magnesium-based solid hydrogen storage material is pressed into a fixed shape.

[0008] Furthermore, the main structure of the hydrogen storage tank is a shell and tube heat exchanger structure.

[0009] Furthermore, a first pipe-side flange and a second pipe-side flange are respectively provided at the left end and the right end of the hydrogen storage tank body.

[0010] Furthermore, the upper end and the lower end of the hydrogen storage tank body are respectively provided with a first shell side flange and a second shell side flange.

[0011] Furthermore, a hole is opened in the middle of the magnesium-based solid hydrogen storage material, and a hydrogen pipeline is inserted into it.

[0012] Furthermore, the hydrogen pipeline is provided with dense circular holes.

[0013] Furthermore, multiple layers of filter screens are arranged outside the hydrogen pipeline.

[0014] The hydrogen storage tank body is wrapped with thermal insulation material.

[0015] The beneficial effects provided by the utility model are as follows: by filling the hydrogen storage materials with foam metal materials having high thermal conductivity, the contact area between hydrogen and the materials can be increased, the efficiency of hydrogen filling and discharge can be improved, and the heat exchange efficiency can be improved; the hydrogen storage materials are pressed into a fixed shape and separated by the foam metal materials to prevent agglomeration, and the cycle life of the hydrogen storage materials is increased, thereby further increasing the service life of the hydrogen storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] In the figure: 1-magnesium-based solid hydrogen storage tank; 2-first pipe-side flange; 3-second pipe-side flange; 4-first shell-side flange (heat transfer oil inlet); 5-second shell-side flange (heat transfer oil outlet); 6-hydrogen pipeline; 7-magnesium-based solid hydrogen storage material; 8-foam metal material. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present utility model clearer, the implementation mode of the present utility model will be further described below in conjunction with the accompanying drawings.

[0019] Please refer to Figure 1 , Figure 1 This is a structural diagram of a hydrogen storage tank of the utility model.

[0020] The utility model provides a magnesium-based solid-state hydrogen storage tank, wherein magnesium-based solid-state hydrogen storage materials 7 are stored in the hydrogen storage tank, and foam metal materials 8 with thermal conductivity are filled between the magnesium-based solid-state hydrogen storage materials 7.

[0021] It should be noted that the magnesium-based solid hydrogen storage material is pressed into a fixed shape.

[0022] It should be noted that the main structure of the hydrogen storage tank is a shell and tube heat exchanger structure.

[0023] It should be noted that the left end and the right end of the hydrogen storage tank body are respectively provided with a first pipe side flange 2 and a second pipe side flange 3.

[0024] It should be noted that the upper end and the lower end of the hydrogen storage tank body are respectively provided with a first shell side flange 4 and a second shell side flange 5.

[0025] It should be noted that the magnesium-based solid hydrogen storage material has a hole in the middle, into which the hydrogen pipeline 6 is inserted.

[0026] It should be noted that the hydrogen pipeline 6 is provided with dense circular holes.

[0027] It should be noted that multiple layers of filters are provided outside the hydrogen pipeline 6 .

[0028] The hydrogen storage tank body is wrapped with thermal insulation material.

[0029] It should be further explained that the hydrogen storage tank adopts a shell and tube structure, and a stainless steel hydrogen pipeline 6 is provided in the tube. One end of the hydrogen pipeline 6 is closed, and dense small holes are opened on the tube wall to allow hydrogen to pass through. The outside of the tube is covered with multiple layers of stainless steel wire filter to prevent dust from entering the hydrogen pipeline.

[0030] When further explanation is needed, the magnesium-based solid hydrogen storage materials are filled with high thermal conductivity foam metal materials, such as foam nickel, foam copper, foam aluminum or foam stainless steel materials, which are not limited in the present invention.

[0031] Embodiment 1:

[0032] When hydrogen is charged, the foam metal material 8 can serve as a channel for hydrogen transmission, thereby increasing the contact area between hydrogen and the magnesium alloy material and improving the hydrogen charging or dehydrogenation rate.

[0033] Embodiment 2:

[0034] When charging with hydrogen, the foam metal material 8 can be used as a heat-conducting fin. The hydrogen storage material reacts with hydrogen and releases heat, which increases the system temperature. However, the thermal conductivity of the generated magnesium-based hydride is extremely poor. Therefore, the foam metal can transfer the reaction heat to the container wall, and the heat transfer oil in the shell side takes away the reaction heat through continuous circulation, thereby maintaining the magnesium-based hydrogen storage material at a suitable hydrogen charging temperature to ensure the smooth progress of the reaction.

[0035] Embodiment three:

[0036] When dehydrogenating, the heat from the heat transfer oil is first transferred to the foam metal material, and then transferred to the magnesium-based hydride (i.e., magnesium-based solid hydrogen storage material) through the metal material. The magnesium-based hydride absorbs the heat and quickly dehydrogenates.

[0037] Embodiment 4:

[0038] The magnesium-based foam metal material 8 is pressed into a round cake shape or other fixed shapes. After being pressed into a fixed shape, a hole can be opened in the middle to insert the hydrogen pipeline 6.

[0039] During the process of charging and decharging hydrogen, the foam metal material 8 can separate the magnesium alloy round cakes to prevent the magnesium alloy material from agglomerating during the repeated process of absorbing and decharging hydrogen, thereby reducing the cycle life.

[0040] Embodiment five:

[0041] During the hydrogen absorption process, the magnesium-based solid hydrogen storage material will undergo a large volume expansion. At this time, the foam metal can act as a buffer zone to eliminate the stress caused by the volume expansion, prevent excessive extrusion of the tank, and increase the service life of the hydrogen storage tank.

[0042] Embodiment six:

[0043] Both left and right ends of the main structure of the hydrogen storage tank are in the form of flange joints. When the hydrogen storage material reaches the end of its service life, the flange joints can be disassembled to replace the hydrogen storage material.

[0044] In addition, the upper and lower ends of the main structure of the hydrogen storage tank are provided with heat transfer oil inlets and outlets, and the reaction temperature is controlled by circulating the heat transfer oil.

[0045] Finally, the hydrogen storage tank body is wrapped with thermal insulation material to reduce heat loss and prevent people from being scalded.

[0046] The beneficial effects of the utility model are as follows: by filling the hydrogen storage materials with foam metal materials having high thermal conductivity, the contact area between hydrogen and the material can be increased, the efficiency of hydrogen filling and discharge can be improved, and the heat exchange efficiency can be improved; the hydrogen storage materials are pressed into a fixed shape and separated by the foam metal materials to prevent agglomeration, and the cycle life of the hydrogen storage materials is improved, and the service life of the hydrogen storage tank is further improved; in general, the utility model improves the system heat exchange efficiency, hydrogen filling and discharge rate and cycle life through a special structural design, and can effectively prevent the expansion of the magnesium alloy material from causing safety problems caused by excessive squeezing of the container body.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnesium-based solid hydrogen storage tank, wherein a magnesium-based solid hydrogen storage material is stored in the hydrogen storage tank, characterized in that: The magnesium-based solid hydrogen storage materials are filled with foam metal materials with thermal conductivity.

2. A magnesium-based solid-state hydrogen storage tank as claimed in claim 1, characterized in that: The magnesium-based solid hydrogen storage material is pressed into a fixed shape.

3. A magnesium-based solid-state hydrogen storage tank as claimed in claim 1, characterized in that: The main structure of the hydrogen storage tank is a shell and tube heat exchanger structure.

4. A magnesium-based solid-state hydrogen storage tank as claimed in claim 3, characterized in that: The left end and the right end of the hydrogen storage tank body are respectively provided with a first pipe side flange and a second pipe side flange.

5. A magnesium-based solid-state hydrogen storage tank as claimed in claim 3, characterized in that: The upper end and the lower end of the hydrogen storage tank body are respectively provided with a first shell side flange and a second shell side flange.

6. A magnesium-based solid-state hydrogen storage tank as claimed in claim 1, characterized in that: The magnesium-based solid hydrogen storage material has a hole in the middle, into which a hydrogen pipeline is inserted.

7. A magnesium-based solid hydrogen storage tank as claimed in claim 6, characterized in that: The hydrogen pipeline is provided with dense circular holes.

8. A magnesium-based solid-state hydrogen storage tank as claimed in claim 7, characterized in that: The hydrogen pipeline is provided with multiple layers of filter screens outside.

9. A magnesium-based solid-state hydrogen storage tank as claimed in claim 1, characterized in that: The hydrogen storage tank body is wrapped with thermal insulation material.

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