Hydrogen liquefaction and boil-off gas recondensation system based on low-temperature refrigerator

Abstract

The invention discloses a hydrogen liquefaction and boil-off gas recondensation system based on a low-temperature refrigerator. The hydrogen liquefaction and boil-off gas recondensation system comprises a hydrogen cylinder, a pre-cooling module, a liquefaction module and a liquid hydrogen storage tank, a liquid inlet pipe is arranged on the lower portion of the liquid hydrogen storage tank, an exhaust pipe is arranged on the upper portion of the liquid hydrogen storage tank, a second stop valve is arranged at a filling opening of the liquid inlet pipe, and a fourth stop valve is arranged at an exhaust opening of the exhaust pipe. The hydrogen cylinder is sequentially connected with the pre-cooling module and the liquefaction module through a pipeline and then is connected with the liquid inlet pipe, and the exhaust pipe is connected with the input end of the liquefaction module through a pipeline with a third stop valve; a fifth stop valve is arranged on the pipeline connecting the precooling module and the liquefaction module, and a first stop valve is arranged on the pipeline connecting the liquefaction module and the liquid inlet pipe. By means of the liquid hydrogen storage device, hydrogen can be evaporated and then condensed in the liquid hydrogen storage process, and zero-evaporation storage of the liquid hydrogen is achieved.

Description

technical field [0001] The present invention relates to the technical field of liquid hydrogen production and storage, in particular to a hydrogen liquefaction and boil-off gas recondensation system based on a cryogenic refrigerator. Background technique [0002] As the most promising next-generation energy carrier, hydrogen has the characteristics of high calorific value and zero pollution, and is widely used in aerospace, automobile, semiconductor and other fields. With the increasing market demand for hydrogen, higher requirements are placed on the safe and efficient storage of hydrogen. [0003] At present, hydrogen storage methods mainly include high-pressure gaseous hydrogen storage, metal hydride hydrogen storage and low-temperature liquid hydrogen storage. High-pressure gaseous hydrogen storage compresses hydrogen to a high-pressure state and stores it in a steel gas cylinder, and its pressure can reach 70-90MPa. High-pressure gaseous hydrogen storage technology is...

AI Technical Summary

Problems solved by technology

[0006]At the same time, the current production of liquid hydrogen generally adopts large-scale hydrogen liquefaction devices, which are large in scale and high in operating costs, and are not suitable for use in small and medium-sized occasions, such as laboratories, etc.

Images