Systems and methods for the deliquification of liquid-containing

Details Systems and methods for the deliquification of liquid-containing Systems and methods for the deliquification of liquid-containing

1992-06-26

1993-07-27

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 92, F26B 1330

Patent

active

052301621

ABSTRACT:
In a freeze-drying method, liquid substances to be dried are sprayed into a stream of cold gas, usually air, at ambient pressure creating a collection of small frozen particles that are metered through a vacuum lock into a vacuumized vertical tower having heated walls and, as the particles fall through the vacuum in the tower to its bottom, radiant heat from the tower walls causes the ice contained in the particles to sublime. The resulting sublimed vapor is removed from the tower by low temperature condensation while the dried particles are collected at the bottom and transferred through another vacuum lock into a container. The operation is continuous and fast, providing significant advantages compared to prior known freeze-drying operations.

REFERENCES:
patent: 4590684 (1986-05-01), Arsem
patent: 4608764 (1986-09-01), Leuenberger

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