Air cycle pre-cooling system for air separation unit

Refrigeration – Processes – Reducing pressure on compressed gas

Reexamination Certificate

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C062S645000, C062S402000

Reexamination Certificate

active

06925818

ABSTRACT:
The method of processing air prior to separation of such air into gaseous components, the steps that include: first compressing a stream of air and cooling the compressed air, to enable water separation and removal from the stream, to provide a dry stream of air; then further compressing the dry air stream and cooling the compressed dry air stream to enable removal of contained remanent water; then expanding the cooled air stream in an expansion stage which extracts work from the expanding stream; then passing the expanded air stream to a separator operating to remove water from the stream, thereby producing dry air passed to a component gas separation stage or stages.

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patent: 5918472 (1999-07-01), Jonqueres
patent: 6526775 (2003-03-01), Asfia et al.

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