Low-temperature hydrogen liquefaction device and use method

Abstract

According to the low-temperature hydrogen liquefaction device and the using method, low-temperature hydrogen-containing mixed gas from an alkane dehydrogenation device, a hydrogen / carbon monoxide cryogenic separation device, a low-temperature liquid nitrogen washing device and the like is directly purified and liquefied to obtain a high-purity liquid hydrogen product. The low-temperature hydrogen-containing mixed gas is subjected to low-temperature adsorption to remove impurities in hydrogen, and then enters the multi-stage heat exchanger to exchange heat with low-temperature circulating hydrogen and liquid nitrogen, so that the hydrogen is cooled stage by stage, and finally, a liquid hydrogen product is obtained. The invention provides the device and the method for directly preparing the liquid hydrogen from the low-temperature hydrogen-containing mixed gas, a low-temperature adsorption purification process is adopted, the device has the characteristics of high adsorption capacity, low loss and low energy consumption compared with normal-temperature adsorption, and hydrogen cycle refrigeration is adopted, so that the liquefaction energy consumption is lower. The invention solves the problems of complex hydrogen-containing mixed gas liquefaction process and high energy consumption, has the advantages of energy conservation, high yield, low investment, easiness in adjustment and the like, and is suitable for large-scale hydrogen liquefaction devices.

Description

technical field [0001] The invention relates to a low-temperature hydrogen liquefaction device and a use method, belonging to the field of hydrogen energy. Background technique [0002] As a new type of energy, hydrogen energy has the advantages of high calorific value, green and pollution-free. However, the high cost and small delivery capacity of high-pressure hydrogen transportation have become a major bottleneck for the large-scale application of hydrogen energy. The large-scale application of hydrogen energy needs to solve a series of problems such as production, storage, transportation, and application, and storage and transportation are the key links in the application of hydrogen energy. Hydrogen storage and transportation are mainly in two ways: high-pressure hydrogen and liquid hydrogen. The use of liquid hydrogen storage and transportation has the following advantages: (1) The comprehensive cost of liquid hydrogen storage and transportation is lower; (2) The stor...

AI Technical Summary

Problems solved by technology

The invention can obtain high-purity liquid hydrogen products, and at the same time solves the problems of complex hydrogen purification process and high energy consumption of low-temperature hydrogen-containing mixed gas, and has the characteristics of energy saving, high yield, small investment, and easy adjustment.

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