| 摘要 |
PURPOSE:To positively prevent an extrordinary temperature rise in a combustion zone by providing a circulating duct circulating a waste gas within the combustion band to a combustion zone or a cooling zone and an air exhaust duct constantly exhausting the combustion gas in the medium stage. CONSTITUTION:When the temperature within a combustion zone 3 indicates a rising tendency, a circulating duct 9 provided between a drying zone 2 and a combustion zone 3 or a cooling zone 4 circulates a large amount of an exhaust gas from the drying zone 2 to any one or both of the combustion zone 3 and the cooling zone 4, and hence the temperature of the combustion zone 3 is immediately lowered by the exhaust gas from the drying zone 2 having a low temperature in accordance with the combustion zone 3. Further, as an exhaust air duct 14 provided in the drying zone 2 or the combustion zone 2 is carrying out a middle stage combustion of the combustion gas constantly from the combustion zone 3, and further exhaust in middle stage a further large amount of the combustion gas in accordance with the increase in the refuse charging amount. Hence, the exhaust amount is increased before the temperature of the combustion zone 3 increases due to the increase in the charging amount. |
