Refrigeration – Cryogenic treatment of gas or gas mixture – Liquefaction
Patent
1997-07-10
1999-08-31
Kilner, Christopher B.
Refrigeration
Cryogenic treatment of gas or gas mixture
Liquefaction
62613, 62912, 62913, F25J 300
Patent
active
059438819
ABSTRACT:
A refrigerating mixture is compressed in the penultimate stage of a plurality of stages of a compression unit. The mixture is partially condensed in order to cool it substantially to ambient temperature; the condensed mixture is separated in order to obtain a vapour fraction and a liquid fraction; the vapour fraction is cooled and partially condensed; the resultant vapour fraction is sent to the final compression stage at least the high pressure vapour fraction and the liquid fraction are cooled, expanded, and circulated in at least first heat exchange means (5) with the fluid to be cooled.
Moreover, according to the invention, during condensation of the vapour fraction, the vapour fraction produced by separating the condensed mixture is cooled by circulating it in heat-exchange relationship with a refrigerating fluid, in second heat exchange means.
REFERENCES:
patent: 4251247 (1981-02-01), Gauberthier et al.
patent: 4274849 (1981-06-01), Garier et al.
patent: 4325231 (1982-04-01), Krieger
patent: 4339253 (1982-07-01), Caetani et al.
patent: 4586942 (1986-05-01), Gauthier
patent: 4755200 (1988-07-01), Liu et al.
patent: 5535594 (1996-07-01), Grenier
Gaz de France (G.D.F.) Service National
Kilner Christopher B.
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