To provide an operating method of a vertical self-burning type carbonizing furnace for organic wastes which maintains the temperature of exhaust gas from the furnace and the concentration of oxygen in the exhaust gas at set values or above, stabilizes thereby a state of burning in a burning zone and thus can ensure combustion decomposition of dioxin.
Secondary combustion air 6a is supplied to the burning zone of the vertical self-burning type carbonizing furnace, while primary combustion air 8a is supplied to a refining zone, and part of the organic wastes charged in is burned thereby and carbonized into charcoal by the heat of burning thereof. In this operating method of the vertical self-burning type carbonizing furnace, the quantity of the secondary combustion air is controlled so that the temperature of the exhaust gas at the exit of the burning zone or at a position on the downstream side thereof be a set temperature of 800°C or above. By heating the burning zone by a burner 24, the temperature of the zone is raised so that the temperature of the exhaust gas be the set temperature of 800°C or above.
HAMAKAWA NORIHIRO
ONOE HIROBUMI
SOREKKUSU INTERNATIONAL KK
NITTETSU PLANT DESIGNING CORP