Liquid hydrogen storage tank and preparation method thereof

Abstract

The invention discloses a liquid hydrogen storage tank. A heat insulation plate is arranged in a storage tank body, a vertically-penetrating cylindrical part is arranged on the heat insulation plate, a pipeline is inserted into the liquid hydrogen liquid level through the cylindrical part, liquid hydrogen is guided into the storage tank body from the tank top side through the pipeline, the countermeasure of preventing liquid hydrogen from bumping and inclining is achieved, and the heat preservation function is improved; and the storage tank body is a multi-layer tank at least provided with an outer shell and an inner shell, a heat insulation layer is formed between the outer shell and the inner wall, the heat insulation layer is of a multi-layer structure and comprises a first heat insulation layer, an expansion / contraction material expands and contracts in the radial direction of the storage tank body, and a second heat insulation layer filled with a filling material serves as the outer layer of the heat insulation layer. While the overall cold preservation function is improved, the expansion / contraction material is used to cover a gap generated by the circulation of contraction deformation of the filling material at low temperature and return deformation at the normal temperature, so that settlement of the filling material is prevented, and damage to the storage tank body due to pressure density caused by settlement of the filling material can be avoided.

Description

technical field [0001] The invention relates to the technical field of ultra-low temperature liquid hydrogen storage devices, and specifically discloses a storage tank for safely storing and transporting ultra-low temperature liquid hydrogen. Background technique [0002] Liquid hydrogen is a liquid obtained by cooling hydrogen. It is a colorless, odorless, high-energy, low-temperature liquid fuel. The normal boiling point of hydrogen at one atmospheric pressure is 20.37 K (-252.78 ° C), and hydrogen has a wide range of uses. [0003] At present, the main method of transporting liquid hydrogen at home and abroad is to use liquid hydrogen tank trucks, liquid hydrogen ships, etc., and use liquid hydrogen storage tanks to store and transport ultra-low temperature liquid hydrogen in a sealed state; however, such ultra-low temperature liquid hydrogen uses liquid hydrogen storage tanks in When an earthquake occurs during land or sea transportation or storage, the liquid surface t...

AI Technical Summary

Problems solved by technology

[0003]At present, the main method of transporting liquid hydrogen at home and abroad is to use liquid hydrogen tank trucks, liquid hydrogen ships, etc., and use liquid hydrogen storage tanks to store and transport ultra-low temperature liquid in a sealed state However, when such ultra-low temperature liquid hydrogen is transported on land or at sea using liquid hydrogen storage tanks or when an earthquake occurs during storage, the liquid level tilts due to liquid hydrogen liquid level fluctuations, which in turn causes liquid hydrogen evaporation loss. lead to explosion

Specifically, since the inner surface (sky surface) of the main body of the storage tank is higher than the other inner surfaces that come into contact with ultra-low temperature liquid hydrogen, when liquid hydrogen contacts the inner surface of the tank roof by tilting, evaporation of liquid hydrogen occurs , the internal pressure of the main body of the storage tank will change after the liquid hydrogen is gasified from the liquid state, and when the pressure continues to increase, various safety hazards such as hydrogen leakage, combustion, and explosion of the main body of the storage tank will occur

[0004]As a person skilled in the art, how to design a structure that can prevent liquid hydrogen from tilting and sloshing in the main body of the storage tank through technical improvement, and prevent The resulting pressure change inside the main body of the storage tank will cause safety accidents

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