Method and installation for the treatment of material contaminated with toxic organic compounds

摘要

Method and installation or apparatus for the treatment of material contaminated with toxic organic compounds in which the material is subjected to a thermal treatment to destroy or decompose the toxic compounds, the thermal treatment being carried out in two stages, i.e. a first stage in which the contaminated material is heated to a temperature of not more than 500 DEG C. under pyrolysis conditions in an indirectly heated rotary furnace, and a second stage in which the solid residue remaining in the first stage is heated in a second furnace to a temperature of at least 500 DEG C. until the concentration of toxic organic compounds in the residue is in the ppb range and preferably 1 ppb or less, and in which the gaseous reaction products of the first and second stages are supplied to a combustion chamber and there burnt at a temperature which is sufficient to completely destroy all the toxic organic compounds contained therein.