| 摘要 |
Process and device for treating contaminated soil and similar materials by the removal, decontamination and possible refilling of the place concerned with cleansed soil. The soil removed is dried and crushed in a mill (2, 29, 57) through which passes a stream of hot gases, and the solid-gas mixture thus formed is taken to a cyclone separator (4, 31, 58) and separated there into gaseous and solid components. The solids are heat treated at high temperature (6, 32, 60) in an initial decontamination process. Following a further separation of the solid and gaseous phases in a further cyclone (8, 34, 62), the solids which are still at least partly contaminated are taken to an intermediate storage area (9, 35, 63) in the form of a transit region and further treated there at temperatures essentially corresponding to the decontamination temperature. The exhaust gases from the drying of the crushed material are after-burnt (16, 42, 75) and, for energy-saving reasons, at least partly re-used in the decontamination process. |
