Refrigeration – Processes – Circulating external gas
Patent
1986-01-13
1987-01-27
Sever, Frank
Refrigeration
Processes
Circulating external gas
62 21, 62 37, 62 54, F25J 302
Patent
active
046392629
ABSTRACT:
There is provided a method for liquefying carbon dioxide gas containing contaminating gas having a lower condensation temperature than that of carbon dioxide, comprising introducing a source flow of carbon dioxide gas containing contaminating gas into a chamber of liquid carbon dioxide at a temperature and pressure to selectively condense carbon dioxide from the source flow, while permitting the contaminating gas to escape from the liquid carbon dioxide; and passing a coolant flow of liquid carbon dioxide in heat exchange relation with the chamber while flashing the coolant flow to maintain the heat exchange relation. Advantageously, the condensed source flow is merged into the liquid coolant flow, and the flashed coolant flow is regulated to maintain a selectively reduced pressure so as to control the temperature of flashing. Contaminating gas collected in the hot path of the exchanger is selectively released to control pressure therein. Apparatus for practicing the method is also disclosed.
REFERENCES:
patent: 2608838 (1952-09-01), Rupp
patent: 3469410 (1969-09-01), Schramm et al.
patent: 3984993 (1976-10-01), Muska
Elonka et al., Std. Refrig. & Air Cond. Questions & Answers, McGraw Hill, 1961, pp. 154-155.
Ammonia-Cooled & Self Contained 2 Stage, Independent CO2 Liquefying System: Bulletin 3CSA 10/4.
Freon-Cooled CO2 Liquefying System: Bulletin 3CBF 10/4.
Ammonia Booster-Type CO2 Liquefying System: Bulletin 3CBA 10/4.
Cold Temp. Vaporizer: Bulletin CTV 3B5.
Electrically-Heated CO2 Vaporizer: Bulletin EHV 1/5.
Water-Heated CO2 Evaporizer: Bulletin WHV WH5H3.
CO2 Steam Vaporizer: no bulletin.
A. N. Heichberger, "New Carbonic Liquefier Developed in Florida", Brewers Digest 59:2, Feb. 1984.
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