MELTING OF RAW MATERIAL IN APPARATUS FOR TREATMENT OF WASTE PLASTIC

摘要

PURPOSE:To melt a raw material (waste plastic) without using a primary melting machine such as an extruder or without occurrence of a hydrochloric acid corrosion damage due to condensation of gaseous hydrogen chloride generated by decomposition of vinyl chloride in the raw material when converting waste plastic materials to low-molecular carbonized compounds according to the fusion- decomposition method. CONSTITUTION:Crushed waste plastic (A) is fed through a feeder equipped with an external heater to a raw material mixing tank 2 while being preheated a <= the starting temperature (<= about 150 deg.C) of dehydrochlorination of vinyl chloride contained in the waste plastic and >= the temperature (about 100 deg.C) free from condensation of gaseous hydrogen chloride generated in the raw material mixing tank 2 in the coexistence of water.