Process and installation for the expansion and compression of at

Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture

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62910, F25J 302

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active

055602231

ABSTRACT:
Process and installation for the compression and expansion of at least one gaseous stream, in which a first stream of a gaseous mixture is compressed in a compressor (5) having at least one compression stage (5A, 5B, 5C); a second stream of a gaseous mixture is supercharged in a supercharger (7); a third stream of a gaseous mixture is expanded in an expansion engine (9); at least a portion of the energy generated by the expansion engine is recovered with the supercharger (7) and at least a portion of the second supercharged stream is sent upstream of one stage (5B) of the compressor. The first and second streams are compressed in at least one stage (5A) of the compressor before sending the second stream to the supercharger. The second stream comes from upstream of one stage of the compressor and at least a portion of the supercharged second stream is returned downstream of this stage. The point of origin of the second stream and the point of return of this latter are separated by at least one compression stage. The first stream and the second stream are distilled, after compression, in a distillation apparatus, and the third stream is a gaseous product withdrawn from the apparatus.

REFERENCES:
patent: 3950957 (1976-04-01), Zakon
patent: 4133662 (1979-01-01), Wagner
patent: 4775399 (1988-10-01), Erickson
patent: 5157926 (1992-10-01), Guilleminot
patent: 5329776 (1994-07-01), Grenier
patent: 5365741 (1994-11-01), Roberts et al.
patent: 5400600 (1995-03-01), Grenier

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