Cryogenic air separation with once-through main condenser

Details Cryogenic air separation with once-through main condenser Cryogenic air separation with once-through main condenser

2005-06-17

2008-09-09

Doerrier, William C (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

C062S903000

Reexamination Certificate

active

07421856

ABSTRACT:
A cryogenic air separation system wherein nitrogen vapor from a higher pressure column and oxygen liquid from a lower pressure column each pass down through a once-through main condenser in heat exchange relation and some but not all of the oxygen liquid is vaporized such that the oxygen liquid and vapor exit the condenser in a liquid to vapor mass flowrate ratio within the range of from 0.05 to 0.5 whereby the need for a recirculation pump to ensure avoidance of oxygen boiling to dryness is eliminated.

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