| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas treatment device capable of eliminating dioxin in an exhaust gas discharged from a metal scrap melting furnace at low costs and stably clarifying the exhaust gas regardless of an operating state of the melting furnace. <P>SOLUTION: A combustion tower 3, a cooling tower 4 and a bag house 5 are successively connected in an exhaust gas discharge passage 2 of the melting furnace 1, a bypass passage 8 for allowing the exhaust gas to flow into the bag house while bypassing the cooling tower is formed at the wake of the combustion tower, a catalyst layer 12 is formed at the wake of a bag filter 5a of the bag house, a thermometer 11 is disposed to measure a temperature of the exhaust gas flowing in the bag house, and a control device 10 is disposed to adjust the quantity of exhaust gas bypassing the cooling tower to constantly keep the temperature measured by the thermometer at 160-250°C. <P>COPYRIGHT: (C)2008,JPO&INPIT |
