Method and apparatus for freeze drying

Details Method and apparatus for freeze drying Method and apparatus for freeze drying

1987-08-07

1988-06-07

Capossela, Ronald C.

Refrigeration

Processes

Fractionally solidifying a constituent and separating the same

62123, B01D 904, C02F 122

Patent

active

047493941

ABSTRACT:
Ethanol is admixed with a compressed vapor in an ice generator, and the mixture is then condensed by indirect heat exchange with a coolant in a chamber. The condensate is collected in a bottom chamber of the ice generator and then supplied to a scraper heat exchanger where primary ice crystals are generated. The ethanol is washed out of the ice crystal suspension in a counterflow washer and the primary ice crystal suspension delivered to a freeze drying chamber where the secondary ice crystal suspension is then generated to form the end product. This method permits the continuous generation of crystalline ice without interruptions for defrosting.

REFERENCES:
patent: 4003213 (1977-01-01), Cox
patent: 4474031 (1984-10-01), Collet

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