Patent ID: 11892234
Assignee: INSTITUTE OF ENGINEERING THERMOPHYSICS, CHINESE ACADEMY OF SCIENCES
Field: Chemical engineering (Chemistry)
Classification: CPC F  Y | IPC F

Claim 8:
9. The system according to claim 1, wherein the supercritical liquefaction subsystem comprises an electric motor, at least one multistage compressor, a drying and purifying device, a proportional adjustment device, a liquid expanding device, a gas-liquid separator and a cryogenic insulation tank,
wherein the electric motor is connected with the multistage compressor by a shaft connection, stages of the multistage compressor are connected by two ways, one way is the shaft connection, and the other is a gas path connection; the drying and purifying device is disposed on a gas path of the multistage compressor for reducing component contents of water vapor, carbon dioxide, and alkane in the air,
wherein the electric motor is configured to drive the multistage compressor to perform a multistage compression of the input gaseous air to form supercritical air, the the supercritical air at an outlet of the multistage compressor enters the proportional adjustment device to be split into two split branches of supercritical air flow, wherein one of the split branches of supercritical air enters the supercritical flow passage in the liquefaction cold box of the staged cryogenic storage subsystem, and then passes through the liquid expanding device for expansion and the gas-liquid separator for separation to form liquid air, and then the liquid air enters the cryogenic insulation tank through a liquid-side outlet of the gas-liquid separator,
wherein the evaporation and expansion subsystem comprises at least one cryopump, a multistage expander and an electric generator, and the liquid air output from the cryogenic insulation tank passes through the cryopump and the supercritical flow passage in the evaporation cold box of the staged cryogenic storage subsystem and evaporates to form the supercritical air, and the supercritical air formed by evaporation is heated by a reheater and then enters the multistage expander to do work and drive the electric generator to generate electricity; the electric generator is connected with the multistage expander by shaft connection, stages of the multistage expander are connected by two ways, one way is the shaft connection, and the other is a gas path connection.