Self-cleaning cryogenic refrigeration system

Details Self-cleaning cryogenic refrigeration system Self-cleaning cryogenic refrigeration system

1996-09-18

1998-03-10

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

62114, 62 482, F25J 100

Patent

active

057248320

ABSTRACT:
A method and device is disclosed for removing residual oil and other contaminants from the refrigerant stream flowing to low-temperature stages of a cryogenic refrigerator. A stream of vapor and liquid refrigerant is which is, in a particular embodiment, cooled by a returning stream of cold the vapor condenses on the platelets and is maintained in equilibrium with the vapor. Since high-molecular-weight contaminants are more soluble in the liquid phase, they are carried down the column with the drops of condensate and are swept out with the liquid fraction through the liquid low-temperature stages of the refrigeration system is cleansed of all oil residues and contaminants. A low-temperature refrigeration system with such a device can be operated continuously for many months with no signs of clogging. Moreover, the fractionating column is inexpensive, contains no moving parts, and does not add significant volume to the system.

REFERENCES:
patent: 3266262 (1966-08-01), Moragne
patent: 4781738 (1988-11-01), Fujiwara et al.
patent: 5337572 (1994-08-01), Longsworth

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