Method For The Cryogenic Separation Of Air, And Air Separation Plant

Abstract: Disclosed is a method for the cryogenic separation of air, in which method an air separation plant (100-300) with a rectification column arrangement (10) is used, which plant has a pressure column (11), a low-pressure column (12), a raw argon column (13) and pure argon column (14). In the method, evaporation gas from a head gas condensation device (13.10) associated with the raw argon column (13) is partially or completely fed into the low-pressure column (12) in a first feed-in area, whereas evaporation gas from a head gas condensation device (14.10) associated with the pure argon column (14) and excess fluid from this head gas condensation device (14.10) are partially or completely fed into the low-pressure column (12) in a shared second feed-in area. In one embodiment, flash gas forming during the expansion of cooling fluid into the head gas condensation device (13.10) associated with the raw argon column (13) can be partially or completely, and separately from the evaporation gas formed here, fed into the low-pressure column (12) in the second feed-in area. The present invention also relates to a corresponding air separation plant (100-200).

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents