Heating steam driven liquid hydrogen preparation system based on energy gradient utilization

Abstract

The invention relates to a heating steam driven liquid hydrogen preparation system based on energy gradient utilization. The heating steam driven liquid hydrogen preparation system comprises power plant heating medium-pressure steam, power plant heating low-pressure steam, a steam turbine for hydrogen purification, a compressor for hydrogen purification, hydrogen purification equipment, a steam turbine for hydrogen liquefaction, a compressor for hydrogen liquefaction, a cold box, a liquid hydrogen tank, a temperature and pressure reduction system and a liquid nitrogen tank, wherein the temperature and pressure reduction system is connected between the power plant heating medium-pressure steam and the power plant heating low-pressure steam; the gas inlet ends of the steam turbine for hydrogen purification and the steam turbine for hydrogen liquefaction are connected with the power plant heating medium-pressure steam; and the gas outlet ends of the steam turbine for hydrogen purificationand the steam turbine for hydrogen liquefaction are connected with the power plant heating low-pressure steam. The heating steam driven liquid hydrogen preparation system has the beneficial effects that the steam turbines drive the hydrogen compressors, so that efficient gradient utilization of power plant heating is realized, the comprehensive utilization efficiency of energy is improved, and the operation cost of the liquid hydrogen preparation system is reduced.

Description

technical field [0001] The invention relates to a liquid hydrogen preparation system, in particular to a heating steam-driven liquid hydrogen preparation system based on energy cascade utilization. Background technique [0002] Responding to the country's call for comprehensive energy supply, relying on the advantages of "power plant +", most of the domestic coal-fired units are currently supplying external heat, and there is a clear growth trend. Steam heating is mainly used in chemical industry parks. [0003] At present, in order to meet the needs of low-pressure steam users, domestic heating units generally adopt temperature reduction and pressure reduction systems. The secondary steam pressure and temperature meet the requirements of the production process. However, with the method of temperature and pressure reduction system, the cascade utilization of steam energy has not been realized, and the process of transforming "high-grade" heat energy into "low-grade" heat e...

AI Technical Summary

Problems solved by technology

However, with the method of temperature and pressure reduction system, the cascade utilization of steam energy has not been realized, and the process of transforming "high-grade" heat energy into "low-grade" heat energy has caused waste, which belongs to the "extensive" production mode

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