C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
23/375, 260/653.
C07C 15/14 (2006.01) B01D 53/86 (2006.01) F23G 7/00 (2006.01) F23G 7/04 (2006.01) F23J 15/04 (2006.01) A62D 3/00 (2006.01)
Patent
CA 1230616
ABSTRACT A Method and Apparatus for Rendering PCB Virulence-Free PCB to be treated is pre-heated with exhaust heat before it is introduced into a combustion furnace to facilitate the reaching of its boiling point, and the pre-heated PCB is caused to ascend through a layer of mineral particles disposed above a grid in a vessel in the furnace, the mineral particles being of a porous multi-element material. The furnace interior and particularly the mineral particle layer are pre-heated to a temperature above 1,100°C from a different heat source. During consecutive reaction processes of gasification, dissociation and combustion of PCB brought about as PCB ascends through the mineral particle layer, the thermal dissociation into benzene ring and chlorine and further combustion of benzene ring are promoted by the catalytic actions of adsorption to mineral particle's large porous surface, catalytic cracking of multi- element oxides present in arranged fashion on the pore surface of mineral particles and surface combustion. This has an equivalent effect to extending the retention time in a high temperature atmosphere at a high temperature preferably above 1,100°C. The exhaust gases from the furnace are fed through a gas treatment tank to absorb and neutralize chlorine gases therein.
466292
Kitamuragokin Industries Co. Ltd.
Marks & Clerk
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