Dry kiln and method
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United States of America Patent
Stats
-
Nov 4, 1986
Grant Date -
N/A
app pub date -
Jul 23, 1984
filing date -
Jul 23, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process and apparatus are disclosed for accelerating the drying of green and/or partially dried lumber. The lumber is dried at pressures below standard atmospheric pressure to rapidly remove moisture from the lumber without degrading the wood structure. A kiln for performing this function includes a chamber for a charge of lumber, an electrically activated flexible heating blanket to impart heat into the charge of lumber, a device for reducing pressure within the chamber, and a device for removing moisture vapor from the chamber. The process for accelerating the drying of the wood includes the step of heating the wood piece in the chamber to a selected temperature. The pressure in the chamber is reduced to a pressure at least as low as the vapor pressure of water at the selected temperature. The wood is controllably heated to maintain the wood at the selected temperature while the pressure in the chamber is reduced.
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