Refrigeration – Processes – Circulating external gas
Patent
1980-12-17
1982-09-28
Yudkoff, Norman
Refrigeration
Processes
Circulating external gas
62 12, F25J 300
Patent
active
043516548
ABSTRACT:
A process for removing troublesome precipitates of condensable gases in a heat exchanger of a continuously operated low temperature installation in which gas to be cooled, such as air, which contains condensable gases at ambient temperature is passed from a warm end to a cold end of the exchanger through a storage material and over heat exchange surfaces--maintained at a temperature ranging from -165.degree. C. to -160.degree. C. at the cold end--and cold regenerator gas free of condensable gases is alternately passed from the cold end to the warm end over the storage material and heat exchanger surfaces to remove precipitates of the condensable gases therefrom in a cyclic operation, without total shut-down of the installation, involves the further step of introducing warm gas which is at a temperature of between 0.degree. C. and +110.degree. C. and which does not contain any condensable gases briefly at the cold end of the heat exchanger so as to remove precipitates remaining within the heat exchanger after a continuous period of the cyclic operation.
REFERENCES:
patent: 2653455 (1953-09-01), Etienne
patent: 2671324 (1954-03-01), Trumpler
patent: 2753701 (1956-07-01), Palmer et al.
Bromme Hermann
Krebs Waldemar
Chemische Werke Huls Aktiengesellschaft
Yudkoff Norman
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