Method and apparatus for removing chlorine component in cracked oil of waste plastics

摘要

PROBLEM TO BE SOLVED: To provide both a method for recovering decomposed oils with an ultralow content of chlorine and an apparatus suitable for carrying out the method. SOLUTION: This method for recovering decomposed oils 13 and 14 comprises bringing a thermal decomposition product when kept in a gas-liquid mixed phase state into contact with an iron oxide-based catalyst, reacting a chlorine component contained in the thermal decomposition product with the catalyst or adsorbing the chlorine component on the catalyst, separating and removing the chlorine component in the method for recovering the decomposed oils 13 and 14 comprising thermally decomposing waste plastics 2 containing the chlorine component in a thermal decomposition vessel 1 and condensing the gaseous thermal decomposition product produced by the thermal decomposition. The thermal decomposition vessel 1 is connected to condensing means for liquefying the thermal decomposition product into the decomposed oils 13 and 14 with a tilted pipe 6 and a fixed bed 10 of the iron oxide-based catalyst is provided in the course of the tilted pipe 6 and at a position where the thermal decomposition product is kept in the gas-liquid mixed phase state and liquids thereof can be recovered as the decomposed oils 13 and 14.