Solid-state high-pressure mixing hydrogen storage tank

Abstract

The invention belongs to a hydrogen storage technology of the hydrogen energy field, and especially relates to a solid-state high-pressure mixing hydrogen storage tank based on solid hydrogen storage and high-pressure hydrogen storage. A main body of the solid-state high-pressure mixing hydrogen storage tank is a metal liner, and a fiber wound reinforced layer is wound and laid on the outer surface of the metal liner; the metal liner is internally provided with a plurality of close-contact metal square pipes which are fixed by a plurality of supporting rings; both ends of each metal square pipe are respectively welded with supporting and positioning stoppers, each supporting and positioning stopper is provided with a through hole and is provided with a filter sheet, and the metal square pipes are internally filled with hydrogen storage materials; both ends of the metal liner are each provided with an end plug, the end plug at one side is provided with a hydrogen valve, and the end plug at the other side is supplied for a plurality of heat exchange pipes to pass through; main bodies of the heat exchange pipes are uniformly distributed in an array formed by the metal square pipes. The metal hydride hydrogen storage device has the advantages of simple structure, easy fabrication and processing, and the nominal working pressure is not less than 35 MPa, and the hydrogen storage capacity is improved by 50% or more compared with that of a pure high-pressure hydrogen storage tank with the same specification.

Description

technical field [0001] The invention belongs to the hydrogen storage technology in the field of hydrogen energy, in particular to a solid-state high-pressure hybrid hydrogen storage tank based on solid hydrogen storage and high-pressure hydrogen storage. Background technique [0002] With the development of society, fossil fuels such as coal, oil, and natural gas can no longer meet the growing needs of human beings. At the same time, the use of fossil fuels has caused the deterioration of the ecological environment, such as the greenhouse effect. In addition, coal, oil, natural gas, etc. are non-renewable resources with limited reserves on the earth, and it is impossible for human beings to depend on them all the time. Therefore, many countries are researching and developing new alternative energy sources, such as wind energy, solar energy, hydrogen energy, nuclear energy, biomass energy, water energy, ocean energy, etc. The combustion calorific value of hydrogen is high, a...

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Problems solved by technology

[0005] Low-temperature liquid hydrogen storage has a high volume hydrogen storage density, about 70kg / m 3 , but there is the problem of liquid hydrogen evaporation (vaporization), so the requirements for the insulation performance of the storage tank are high. In addition, refrigeration is required to achieve the required low temperature, which consumes a lot of energy, so its application is limited

[0006] The filling and discharging rate of high-pressure gaseous hydrogen storage is very fast, but its volume hydrogen storage density is relatively low. By increasing the hydrogen pressure, the volume density of hydrogen can be increased, but the increase is limited. At room temperature, even if the hydrogen pressure increases to 70MPa, the hydrogen The bulk density is only 40kg / m 3 about

[0007] The solid-state hydrogen storage using hydrogen storage materials (such as: metal hydride) is to store the hydrogen storage materials in a closed container, and use the hydrogen absorption capacity of the hydrogen storage materials to realize the solid-state storage of hydrogen, which has a high volume hydrogen storage density, even The volume hydrogen storage density is higher than that of liquid hydrogen, such as LaNi 5 The volume hydrogen storage density of the hydrogen storage alloy can reach 100kg / m 3 above, but its gravimetric hydrogen storage rate is relatively low (generally no more than 3wt%), and the hydrogen absorption and desorption process is limited by heat transfer, making the filling and discharging rate of the solid-state hydrogen storage device slower

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