Hydrogen liquefying device and method

Abstract

The invention discloses a hydrogen liquefying device. The hydrogen liquefying device comprises a hydrogen intake pipe, a heat exchanger A, a heat exchanger B, a heat exchanger C, a flash tank and a liquid hydrogen storage tank for communicating in sequence. The invention further discloses a hydrogen liquefying method, comprising the following steps: (S1) hydrogen is precooled; (S2) orthohydrogen and parahydrogen are converted and liquefied; (S3) one part of liquid hydrogen serves as supercooled gas to input back into the heat exchanger C; (S4) hydrogen steam and the liquid hydrogen are separated by the flash tank; and the liquid hydrogen is prepared and stored; and (S5) unliquefied hydrogen is recovered. The hydrogen liquefying method is simple in flow, flexible in adjustment, reliable in work, convenient to maintain and low in energy consumption.

Description

technical field

[0001] The invention relates to hydrogen liquefaction, in particular to a hydrogen liquefaction device and method. Background technique

[0002] Hydrogen is the main industrial raw material, and also the most important industrial gas and special gas. It has been widely used in petrochemical industry, electronics industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace and other fields. On the other hand, hydrogen is also an important energy source. The calorific value of hydrogen is relatively high, which is about three times the calorific value of gasoline. The combustion of hydrogen is relatively good, and it is flammable in the range of 3% to 97%. Hydrogen has good recyclability, and the water generated by the combustion reaction can be recycled and re-produced. It is the fuel for future power generation and fuel cells for electric vehicles. It is foreseeable that the future world will transform from a carbon-based...

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