SHAFT FURNACE TYPE THERMAL DECOMPOSITION MELTING FURNACE AND THERMAL DECOMPOSITION MELTING METHOD

摘要

PROBLEM TO BE SOLVED: To perform stable operation by improving drying capacity of moisture content in a waste at a shaft part and preventing descent from becoming unstable, even when fluctuation in the moisture content of waste is wide. SOLUTION: In a shaft furnace type thermal decomposition fusion furnace, wherein waste, such as general waste, intermediate waste, and industrial waste, is dried at a dry zone 6 and thermal decomposition melting is effected at a combustion melting zone 8 therebelow, a tuyere 2 for a combustion melting zone, against which oxygen enriched air is blown, is situated at the combustion melting zone 8. A plurality of tuyeres 15 for a dry zone to blow air against the shaft part of the dry zone 6 above the combustion melting zone 8 are arranged in a plurality of stages. A melting furnace body 1 has the dry zone 6 formed into a cylindrical shape extending vertically or spreading downward. The lower end of a thermal decomposition zone 7 is formed into a narrow shape at an angle higher than an angle of repose of waste, and the combustion fusion zone 8 is formed into a cylindrical shape.