Hydrogen liquefaction process
A process, liquid nitrogen technology, applied in the field of hydrogen liquefaction process, can solve the problems of low hydrogen critical temperature and conversion temperature, small latent heat of vaporization, difficulty in producing liquid hydrogen, etc., to avoid waste, save energy, and avoid direct emissions.
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[0028] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0029] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0030] Such as figure 1 As shown, a hydrogen liquefaction process includes a nitrogen refrigeration cycle, a helium refrigeration cycle and a hydrogen refrigeration cycle;
[0031] The nitrogen refrigeration cycle includes the following steps: a) generating liquid nitrogen from air through an air separation device; b) inputting the generated liquid nitrogen into the second heat exchanger in the cold box, the second heat exchanger is It becomes a liquid nitrogen tank, and the liquid nitrogen evaporat...
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