Process for drying wood
OwnerFurio Bertiinventor
Life of this patent
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Abstract
A process for kiln drying timber in which heated air is passed over the timber, subsequently cooled to dehumidify it, and then reheated and recirculated, wherein times are substantially shortened by separating the process into two stages, a first stage where the temperature of the air passing over the wood is held relatively low, that is between 20.degree.C and 30.degree.C, and a second stage in which the temperature is raised to between 34.degree.C and 38.degree.C, the changeover from the first stage to the second being effected when the moisture content of the wood being dried has fallen to between 16 and 25 percent.
Claims10
In a process for the forced drying of wood, wherein air is circulated around a closed circuit in which the air is heated, passed over the wood to be dried, de-humidified by cooling and then re-heated to commence another circuit, the improvement comprising the steps of:
- a. a first stage of heating and maintaining the air passing over the wood at between 20.degree.C and 30.degree.C until the moisture content of the wood has fallen to between 16 and 25 percent by weight;
- and
- b. a second stage of raising the temperature of the air passing over the wood to between 34.degree.C and 38.degree.C and maintaining the air passing over the wood at between 34.degree.C and 38.degree.C until the moisture level of the wood has fallen to a predetermined level at which drying is considered complete.
In a process for the forced drying of wood, wherein air is circulated around a closed circuit in which the air is heated, passed over the wood to be dried, de-humidified by cooling and then re-heated to commence another circuit, the improvement comprising the steps of:
- a. a first stage of heating and maintaing the air passing over the wood at between 20.degree.C and 30.degree.C for a period of time until the moisture content of the wood has fallen to the point of fibre saturation;
- and
- b. a second stage of raising the temperature of the air passing over the wood to above 34.degree.C.
Dependencies are inferred from the claim text.