REDUCING METHOD AND DEVICE FOR PCDDs IN CHAR SEPARATING TYPE WASTE GASIFYING AND MELTING DEVICE

摘要

PROBLEM TO BE SOLVED: To contrive the reduction of PCDDs in fly ash and exhaust gas, in a char separating type waste gasifying and melting device. SOLUTION: A melting furnace 30 is connected directly to a temperature reducing tower 21 through a melting furnace exhaust gas conduit 36a to cool the exhaust gas of the melting furnace 30 by introducing the same directly into the temperature reducing tower 21 without recovering the sensible heat of the exhaust gas of the melting furnace 30 and without interposing a boiler 16 and an air preheater 18.