| 摘要 |
PURPOSE:To stably perform melting of waste and exhaust of molten waste in an apparatus for melting waste or the intermediate product of the waste in a high temperature hearth made of carbonaceous combustible substance by specifying the quantity of supplied oxygen to each section and the temperature of each section. CONSTITUTION:A high temperature hearth 2 made of carbonaceous combustible substance is formed at a melting furnace 1, and industrial waste or its intermediate product from a hopper 3 is incinerated and molten at the upper part of the furnace. Combustion waste gas is exhausted through a rising temperature passage 7 and a passage 8 connected to the lower part of the hearth 2. In this melting method, the superficial velocity of rising gas in the hearth 2 is set to 15-60Nm<3>/m<2>.min, and exhaust gas temperature of the passage 8 is set to higher than 1,350 deg.C. Further, the quantity of supplied combustible substance is adjusted so that the quantity of O2 to the hearth 2 becomes 0.8-1.2 times of theoretical oxygen quantity of the carbonaceous combustible substance supplied to the hearth 2, and exhaust gas afterburning air containing predetermined quantity of O2 is supplied to the passage 7. |
