Drying veneer with jets of superheated solvent vapor

Details Drying veneer with jets of superheated solvent vapor Drying veneer with jets of superheated solvent vapor

1977-04-21

1978-08-15

Sebastian, Leland A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 165, 34 23, 34 29, 34 30, 34 36, F26B 304

Patent

active

041062094

ABSTRACT:
Veneer is dried by passing a veneer sheet by at least one set of spaced orifices or nozzles through which jets of superheated organic solvent vapor are directed against one or both of the bottom and top sides of the sheet. After impinging on the wood surface, the spent solvent vapor plus moisture and other volatile substances from the wood passes to a condenser where the solvent is separated and passed to a vaporizer and superheater for recycle to the process. In an optional variation, a preliminary extraction of the entering veneer by condensing solvent is achieved by adjusting the flow rate or temperature of the solvent vapor in the fore part of the drying apparatus. Apparatus for carrying out the veneer drying process with means for recovering and recycling spent solvent is shown.

REFERENCES:
patent: 112359 (1914-09-01), Clope
patent: 2884707 (1959-05-01), Sandback
patent: 3099541 (1963-07-01), Hildebrand
patent: 3545094 (1970-12-01), Schuette et al.
patent: 3685959 (1972-08-01), Dunn, Jr. et al.
patent: 3971139 (1976-07-01), Rochom

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