Cryogenic distillation system for air separation

Details Cryogenic distillation system for air separation Cryogenic distillation system for air separation

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/04 (2006.01)

Patent

CA 2308812

Air is separated in a triple column comprising a high pressure column (101), an intermediate pressure column (102) and a low pressure column (103), the intermediate pressure column being fed by oxygen enriched liquid from the high pressure column. The low pressure column feeds an argon column (104) with argon enriched liquid and operates at a higher pressure than the argon column. Heat is supplied to the bottom of the argon column by sending gas to a bottom reboiler(23). This gas is preferably rich in nitrogen and may come from the top of the low pressure column.

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