Process for drying large pieces of wood at subatmospheric...

Details Process for drying large pieces of wood at subatmospheric... Process for drying large pieces of wood at subatmospheric...

F - Mech Eng,Light,Heat,Weapons

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B

34/4, 34/46

F26B 5/04 (2006.01) F26B 3/04 (2006.01) F26B 21/02 (2006.01)

Patent

CA 1072321

ABSTRACT OF THE INVENTION A process for drying wood at subatmospheric pressures comprising a phase in which the wood is heated up in a sealed environment, is characterised in the fact that this heating-up phase comprises the operations of a I) - introducing into said closed environment an operative fluid which is capable of imparting moisture to the wood, causing this fluid to cycle repeatedly around a closed circuit in such a way that in every cyole, the fluid passes through a pile formed by the pieces of wood 9 and then returns without passing through the pile; II) - supplying thermal energy to the operative fluid in such a way that the thermal content of the fluid increase overall in each cycle at a diminishing rate until the fluid reaches a substantially steady cyclical state in which there is no overall increase in its thermal content in each subsequent cycle.

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