Patent ID: 6376738
Filing Date: 2002-04-23
Classification: B01D,C10B,C10J,C10L,F23G

Abstract:
A process for treating a treatable material containing chlorine as a noxious component, comprising the following steps:carrying out a first step for the treatable material, said first step including mixing a treatment agent with the treatable material to form a mixture, said treatment agent containing alkali material, said alkali material comprising at least one compound selected from the group consisting of an alkali metal compound and an alkaline-earth metal compound, supplying the mixture of the treatment agent and the treatable material into a rotatable cylindrical body of a first furnace, stirring the mixture and moving the mixture axially in the first furnace, and heating the mixture in a low oxygen concentration atmosphere in the rotatable cylindrical body of the first furnace at a first temperature at which the treatable material is decomposed to generate a substance containing the noxious component, by a heating device disposed outside the rotatable cylindrical body of the first furnace, said heating the mixture thermally decomposing the treatable material to generate the substance containing the noxious component, whereby the substance contacts and reacts with the treatment agent to form a chloride, to thereby form a treatable material residue containing the chloride, and carrying out a second (volume-reduction) step for the treatable material residue fed from the first furnace, said second step including heating the treatable material residue at a second temperature at which carbonization of the treatable material residue takes place, in a rotatable cylindrical body of a second furnace separate from said first furnace, said heating the treatable material residue accomplishing dry distillation of the treatable material residue so as to reduce volume of the treatable material residue, the second temperature being higher than the first temperature.