Method and device for creating a gaseous, pressurised product by the cryogenic decomposition of air

摘要

The method involves bringing a fluid oxygen-product stream (30) to increased pressure at a liquid state. The oxygen-product stream is evaporated or pseudo-evaporated in a main heat exchanger (14) under increased pressure. The oxygen-product stream is approximately heated to ambient temperature and drawn as a gaseous oxygen-pressurized product stream (33). Two expansion machines (16, 25) are coupled with a compacting machine, a heated repressing unit (8) and a cold compressor (19). A part (27) of relaxed partial flow (26) is guided into a low pressure column (90). An independent claim is also included for a device for producing a gaseous oxygen-pressurized product by cryogenic decomposition of air in a fractionating column system.