METHOD AND SYSTEM FOR HEATING MATTER TO BE TREATED

摘要

PROBLEM TO BE SOLVED: To keep a positive pressure in a decomposition gas combustion furnace by making the pressure in a heating furnace negative with respect to the atmospheric pressure and keeping the pressure in a decomposition gas combustion furnace positive with respect to the atmospheric pressure thereby preventing leakage of decomposition gas from the heating furnace. SOLUTION: Pressure in a rotary heating furnace has a trend to become negative with respect to atmospheric pressure because the heating furnace is normally sucked by means of a blower 39 having a bug filter 38 but it has a trend to become positive upon generation of decomposition gas through heating operation. Decomposition gas in the rotary heating furnace is sucked by means of the blower 53 in a decomposition gas introducing means 50 and the pressure in the rotary heating furnace can be made negative with respect to the atmospheric pressure. The negative pressure can be regulated easily by controlling rotation of blower preferably in the range of -5 to -10 mmH2O. Pressure in a decomposition gas combustion furnace 34 is preferably kept positive (0 to +10 mmH2O) in view point of combustion conditions by introducing air and decomposition gas.