Wood drying method
AssigneeTechnical System Keep Limited Company
InventorSachio Ishii
Life of this patent
Estimating the term…
Abstract
Method for drying wood in a short period of time by maintaining the concentration of a combustion gas contained in a drying room atmosphere for use in drying the wood to a high value and by maintaining the pressure of the drying room atmosphere to a high value. Wood fuels such as waste wood are put into a combustion chamber ins lower area of a combustion gas generating furnace and then the wood fuels are burned, followed by introducing the high-temperature combustion gas generated by the burning of the wood fuels into an upper area of a drying room housing the green wood to thereby dry the wood. Thermal drying of the wood is carried out by maintaining the concentration of the combustion gas present in the drying room atmosphere at a the high value and by maintaining the pressure of the drying room atmosphere at a high value.
Claims11
A method for drying wood comprising the steps of:
- putting fuel into a combustion chamber arranged in a lower area of a combustion gas generating furnace;
- burning the fuel to generate a high-temperature combustion gas in the furnace;
- introducing the combustion gas generated by the burning of the fuel in the furnace into an upper area of a drying room housing wood to be dried to thereby thermally dry the wood;
- controlling a discharge of a drying room atmosphere including air and combustion gas from the drying room through a chimney;
- controlling the introduction of the combustion gas generated in the furnace into the drying room based on the discharge of the drying room atmosphere through the chimney;
- and
- controlling a recovery flow of air and combustion gas from the drying room into the furnace,
- the discharge of the drying room atmosphere, the introduction of the combustion gas into the drying room and the recovery flow of air and combustion gas into the furnace being controlled to maintain a concentration of combustion gas in the drying room in a range of 60% to 95% by volume and the pressure of the drying room atmosphere in a range of 1.5 to 5 atmospheres.
Dependencies are inferred from the claim text.