Triple distillation column nitrogen generator with plural reboil

Details Triple distillation column nitrogen generator with plural reboil Triple distillation column nitrogen generator with plural reboil

1990-09-20

1991-12-03

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 31, 62 39, F25J 302

Patent

active

050696998

ABSTRACT:
The present invention is a cryogenic process for the production of nitrogen by distilling air in a double column distillation system comprising a high pressure column and a low pressure column associated functionally with an extra high pressure (EHP) distillation column for added nitrogen production. The critical step of the invention is the dual pathway condensation of nitrogen streams in two reboiler/condensers located in the stripping section of the low pressure column to provide condensed high pressure and EHP nitrogen streams that provides liquid reflux to the high pressure columns.

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