| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a carbonization furnace for a woody material that is a simple apparatus and has high economical efficiency even if being a small-scale furnace, in which a dry distillation gas generated during a carbonization process is burned as is in the furnace and can be utilized as a thermal source of the carbonization. <P>SOLUTION: This carbonization furnace has a square carbonization chamber 2 in a furnace body, a combustion chamber 3 in the upper space of which a combustible gas generated from the chamber 2 is burned, a tuyere through which air is blown into the combustion chamber, a means which regulates an air volume blown in through the tuyere, a heat transfer wall 10 of a fire-brick disposed at side faces of at least both long sides or otherwise at this and a bottom face of the carbonization chamber, an exhausted gas duct through which a high temperature exhausted gas from the combustion chamber is circulated along the whole area of an outside of the heat transfer wall, wherein sensible heat of the exhausted gas within the exhausted gas duct is heat-transferred to a woody material layer 8 in the carbonization chamber through the heat transfer wall. The furnace is equipped with two stage tuyeres composed of a bottom tuyere 4b disposed at overhead of the carbonization chamber and a top tuyere 4a disposed at the top of the combustion chamber, and the blow rate of air to the each tuyere is adjustable. <P>COPYRIGHT: (C)2007,JPO&INPIT |
