To provide a carbonization method by which a carbonized product having physical properties suitable for new uses is obtained by controlling carbonization conditions in an oven and by which an exhaust gas by-produced on the carbonization can usefully be used for pyroligneous acid production and the like.
This carbonization method is characterized by stirring and circulating air in a carbonization oven 1 with a stirring circulation means 4 to uniform the inner temperature of the oven on the carbonization. Another carbonization method is characterized by introducing air or air and steam from a refinement blower into the oven through an oven floor portion to carbonize and refine a carbonization material. Exhaust gas by-produced on the carbonization is cooled and recovered for each temperature to obtain pyroligneous acid liquids having different physical properties, respectively. The exhaust gas by-produced on the carbonization is burned, and the generated heat is recovered in a heat storage chamber or directly brought into a carbonization material, thus using the heat in a drying and heating process.
SUKAI MINORU
TAKANUMA TERUYUKI
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