Refrigeration – Processes – Circulating external gas
Patent
1988-06-20
1989-05-30
Warner, Steven E.
Refrigeration
Processes
Circulating external gas
62 33, F25J 300
Patent
active
048347850
ABSTRACT:
The present invention is an improvement to a conventional, single column, cryogenic, nitrogen generator which is able to produce nitrogen at near atmospheric pressure. In the improvement, the product nitrogen from the rectifier column is expanded through an expansion turbine to produce refrigeration for the process. Expanding the nitrogen makes it possible for the main air compressor to operate at a much lower pressure and achieve a significant reduction in compression power as compared to conventional waste expander and air expander cycles.
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Air Products and Chemicals Inc.
Jones II Willard
Marsh William F.
Simmons James C.
Warner Steven E.
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