REMOVAL OF HYDROGEN CHLORIDE CONTAINED IN THERMAL CRACKING GAS OF WASTE PLASTIC MATERIAL AND OIL FORMING TREATMENT EQUIPMENT OF WASTE PLASTIC MATERIAL

摘要

PROBLEM TO BE SOLVED: To perform oil forming treatment under a stable and efficient hydrogen chloride removing condition without increasing pressure loss by introducing thermal cracking gas of a waste plastic material into a hydrogen chloride removing tank packed with alumina particles to react hydrogen chloride with alumina particles to remove the same. ;SOLUTION: General waste plastic is finely granulated to be charged into an extruder 11 and kneaded and melted under heating and the molten kneaded matter is heated in a raw material mixing tank 12 on an outlet side using the refluxed thermal cracking oil from a thermal cracking tank 13. The hydrogen chloride gas generated in this melting process is guided to a washing tower 17 from the extruder 11 and the raw material mixing tank 12, and washed and neutralized by the NaOH aq. soln. from an NaOH supply line 19. Subsequently, the mixture of molten plastic and thermal cracking oil is supplied to the thermal cracking tank 13 to be raised in temp. and the generated thermally cracked oil vapor is introduced into a hydrogen chloride removing tank 18 packed with alumina particles to be reacted with alumina particles and hydrogen chloride in the thermally cracked oil vapor is converted to aluminum chloride to be removed.;COPYRIGHT: (C)1997,JPO