TREATING SYSTEM AND TREATING DEVICE FOR WASTE HOUSEHOLD ELECTRICAL APPLIANCES AND OFFICE AUTOMATIC EQUIPMENT

摘要

PURPOSE:To enhance the recovery efficiency of useful materials by thermally decomposing the synthetic resins in waste constituting members in a thermal decomposition furnace, separating these synthetic resins to thermal decomposition gases and mixtures composed of melting residues and metals, treating the dry distillation gases in a petrochemical cycle and subjecting the other mixture to a fractionation treatment by crushing and screening stages. CONSTITUTION:Waste household electrical appliances 1 from which parts, such as motors and compressors, reutilizable in their original shapes are removed, are supplied by a conveyor 2 to a rotary kiln 3 where these appliances are rotated under heating and the synthetic resins in the constituting members are thermally decomposed. The dry distillation gases generated at this time are withdrawn through a line 40 and are treated in the petrochemical process including a cooler 41, an oil-water separator 42, etc. The melt is extracted from a slit in mid-way and the molten residues are discharged from a discharge port to a recovering conveyor 4 or a water sealing pit 5. The waste is then supplied to a crushing machine 6 and the iron and metals are recovered by a magnetic separator 9 in the process of transporting the crushed matter by a belt conveyor 7. The others are fractionated by an eddy current screening machine 10 to aluminum and copper which are recovered.