Method for treating and drying of wood

Details Method for treating and drying of wood Method for treating and drying of wood

F - Mech Eng,Light,Heat,Weapons

26

B

F26B 5/14 (2006.01) B27M 1/02 (2006.01) F26B 1/00 (2006.01) F26B 7/00 (2006.01)

Patent

CA 2437804

Object for the invention is a method for treatment and drying of wood, in which method the wood is warmed up to an essentially higher temperature than the boiling point of water, where after the wood is compressed between moisture permeable pressing pieces. The method in accordance with the invention is characterized in that the temperature of the wood is increased so quickly, that the moisture existing in the wood does not have the time to evaporate to an essential degree before the temperature of the wood has increased above the boiling point of water. In a method of drying of timber of this kind for the building-up of the steam atmosphere needed does not require separately from the outside brought water for the producing of the steam, but the steam needed for the building-up of the steam atmosphere is produced in the pressing phase out of the moisture leaving the wood. In such a way energy is saved and the apparatuses needed for the method are got more simple and favourable than the apparatuses used earlier for a corresponding purpose.

L'invention concerne un procédé de traitement et de séchage du bois dans lequel on chauffe le bois à une température sensiblement plus élevée que celle du point d'ébullition de l'eau, le bois étant ensuite comprimé entre des pièces de presse perméables à l'humidité. Ledit procédé est caractérisé par le fait qu'on élève si rapidement la température du bois que l'humidité qu'il contient n'a pas le temps de s'évaporer avant l'élévation de sa température jusqu'au point d'ébullition de l'eau. Dans le procédé de séchage du bois d'oeuvre, la formation de l'atmosphère de vapeur nécessaire pour produire la vapeur ne requiert pas d'eau de l'extérieur, la vapeur nécessaire à la formation de l'atmosphère de vapeur étant produite dans la phase de pressage à partir de l'humidité provenant du bois. De ce fait, l'énergie est sauvegardée et les appareils nécessaires à la mise en oeuvre de ce procédé sont plus simples et plus appropriés que ceux utilisés antérieurement à des fins identiques.

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