RECOVERY SYSTEM FOR POLYVINYL CHLORIDE

摘要

PROBLEM TO BE SOLVED: To provide a recovery system for polyvinyl chloride included in waste materials wherein the recovered polyvinyl chloride keeps preferable properties for reuse. SOLUTION: This recovery system is obtained by including following steps; polyvinyl chloride included in waste materials is dissolved in a dissolver 1 with a given solvent, the resultant solution is fed to a first solid-liquid separator 8 where insoluble bulky-solids are separated, then the resultant first filtrate therefrom is fed through a intermediate storage tank 11 to a second solid-liquid separator 13 where insoluble micro-solids in the first filtrate are centrifuged and then the second filtrate is fed to an evaporator dryer 15 so as to recover and pool in a tank 18. The solvent vapor exhausted from the evaporation dryer 15 is cooled in a heat exchanger 20 and so the solvent is recovered and pooled in a tank 22.