Method and apparatus for freeze drying

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

1990-05-09

1992-02-25

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 92, F26B 506

Patent

active

050901320

ABSTRACT:
A freeze drying apparatus comprises a heat-transfer medium container having heat-transfer medium inlet/outlet pipes, a plurality of tubes extending through the heat-transfer medium container from its lower plate to upper plate, a lower space formed beneath the heat-transfer medium container and being in communication with the tubes and a product liquid inlet/outlet conduit, an openable bottom lid defining the bottom of the lower space, an upper space formed above the upper plate of the heat-transfer medium container, a trap chamber being in communication with the upper space, pressure regulation lid means operable to airtightly cover part of the tubes at their upper ends, and a pressure regulation conduit with pressure regulation valve operable to regulate pressure in the tubes covered with the pressure regulation lid means.

REFERENCES:
patent: 4802286 (1989-02-01), Kobayashi et al.

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