Method for drying saw timber and device for implementing...

F - Mech Eng,Light,Heat,Weapons – 26 – B

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F26B 7/00 (2006.01) F26B 3/34 (2006.01) F26B 3/347 (2006.01) F26B 21/10 (2006.01)

Patent

CA 2309307

The invention concerns a method for drying wooden objects characterised in that it consists in: a step of pressurising a sealed chamber (1) at a predetermined pressure by injecting or generating saturating water vapour and maintaining that pressure for a predetermined time interval, while ensuring in the chamber a forced circulation of air and saturating water vapour; a step of heating the wood core and the central zone of the wood pieces by emitting microwaves in frequencies ranging between 400 and 2450 MHz; a step of evacuating the liquid exudates coming from the wood and collected by dripping in the chamber (1) base.

La présente invention concerne un procédé de séchage des objets en bois caractérisé en ce que le procédé de séchage du bois comporte: une étape de mise en pression à une pression déterminée d'une enceinte (1) étanche au moins par injection ou création de vapeur d'eau saturante et de maintien de cette pression pendant un temps déterminé, tout en assurant dans l'enceinte une circulation forcée d'air et de vapeur d'eau saturante; une étape de chauffage au coeur du bois et dans la zone centrale des pièces de bois à sécher par émission de micro-ondes dans des fréquences comprises entre 400 et 2450 MHz; une étape d'évacuation des exsudats liquides sortant du bois et recueillis par ruissellement dans le fond de l'enceinte (1).

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