Method for drying wood

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

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Details

F26B 21/06 (2006.01)

Patent

CA 2229276

The invention relates to a method of drying wood in a drying chamber (1), wherein a drying medium, for instance air, is circulated through a batch of wood (10) placed in the drying chamber (1) in a wood-drying process. The drop in temperature (.DELTA.T) of the drying medium is measured in conjunction with passage of the drying medium through the wood batch (10), and the temperature drop therewith obtained is used to control or regulate the state of the circulating drying medium with regard to its moisture content and temperature, for instance. The dry temperature (T) and the wet temperature (TV) of the circulating dry medium are also measured in the proximity of the wood batch (10), and the temperature information therewith obtained is also used to control or regulate the state of the circulating drying medium with regard to its moisture content and temperature, for instance. According to the invention, the drying process takes place in a plurality of different phases (phases II-V) with varying control or regulating interaction between dry temperature drop (.DELTA.T), dry temperature (T) and wet temperature (TV).

L'invention concerne un procédé de séchage pour le bois, lequel consiste à faire circuler à travers une quantité de bois (10) placée à l'intérieur d'une chambre de séchage (1) un milieu de séchage, par exemple de l'air. On mesure la baisse de température ( DELTA T) du milieu au cours de son passage à travers la quantité de bois (10), le résultat obtenu permettant de contrôler ou de réguler l'état de ce milieu du point de vue de son humidité et de sa température, par exemple. On mesure en outre la température sèche (T) et la température humide (TV) du milieu de séchage en circulation, à proximité de la quantité de bois (10), les résultats obtenus permettant aussi de réguler l'état dudit milieu du point de vue de son humidité et de sa température, par exemple. Selon l'invention, le processus de séchage se fait en une pluralité de phases différentes (phase II-V) avec différents degrés de contrôle et de régulation de l'interaction entre la baisse de température sèche ( DELTA T), la température sèche (T) et la température humide (TV).

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