Air separation process and system utilizing pressure-swing drier

Details Air separation process and system utilizing pressure-swing drier Air separation process and system utilizing pressure-swing drier

1974-07-22

1976-07-06

Lutter, Frank W.

Refrigeration

Processes

Circulating external gas

55 62, 62 39, 62 18, F25J 302

Patent

active

039674649

ABSTRACT:
A cryogenic air separation system is described in which pressure-swing adsorption driers are used to remove virtually all of the moisture from the feed air prior to the passage of the feed air stream through reversing heat exchangers which remove the carbon dioxide. The reversing heat exchangers are regenerated by at least one outgoing product nitrogen stream, while the adsorption driers are regenerated by all or a portion of a low pressure stream withdrawn from the low pressure column the composition of which may be rich in either nitrogen or oxygen depending upon whether the volume of product nitrogen or oxygen is to be maximized. A portion of this low pressure stream may be recovered as a dry product stream, while an additional stream of high purity product oxygen may also be recovered.

REFERENCES:
patent: 3210950 (1965-10-01), Lady
patent: 3564816 (1971-02-01), Batta

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