| 摘要 |
A method is described in treating solid material to remove vaporizable substances from said material, comprising a thermal separation process, in which the solid material is subjected to heating and steam distillation for evaporation of substances to be separated off, especially to remove hydrocarbons from cuttings, polluted soil, etc. Heating for evaporation comprises heating in a heat exchanger, comprising a casing with a rotatable hollow rotor provided in said casing, and wherein the material is conveyed during indirect heating, from an inlet to an outlet, heating being carried out with a rising temperature profile in the direction of conveyance. Steam is injected directly into the material in a region of lower temperature in the heat exchanger, and the exhaust gas is discharged from the heat exchanger and led to a condenser. |
