| 摘要 |
A method to process contaminated soil or waste in high temperature. The material (4, 5) to be processed is conducted to a first rotating drum oven (1), where the material is heated to a temperature of 230-280°C, at which components of the material evaporate and gasify. The evaporated and gasified components are discharged from the drum oven (1) and condensed. The pre-processed material (6) is conducted to a second rotating drum oven (2), where the material is heated to a temperature of 1000-1200°C, whereupon the material forms granules due to the rotating motion of the drum oven (2). The combustion gases (13) from the second drum oven are conducted through a heat exchanger (9), and oxygen-rich gas, such as air (8), is heated in the heat exchanger (9) and supplied (10 and 14) for burning the fuel (7) of the second drum oven and for heating the inner casing of the first drum oven (1). The components (12) condensed in the first drum oven (1) are recovered and/or conducted to the second drum oven (2) for fuel. |
