Waste plastic crushing and drying apparatus, crushing and drying method, and crushing and drying transportation system

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for drying waste plastics, in which a hot air generating device is unnecessitated and furthermore an installation for cleaning exhaust gas is simplified. SOLUTION: The device for drying waste plastics is equipped with at least a transport pipeline for air-transporting the waste plastics, a separator for separating the same and air after transport, a blower generating air current for transport, a circulation pipeline for recycling exhaust gas after transport to the transport pipeline, an exhaust gas pipeline for exhausting a part of exhaust gas to the outside of a system and a regulation valve for regulating the amount of circulated air and the amount of exhausted air. A crusher for crushing the waste plastics before transport, a feeding device for feeding the waste plastics to the transport pipeline while interrupting air and a heating device in the circulation pipeline are provided in accordance with necessity.