PURPOSE: To enhance the degradation degree of a thermosetting resin, increase oil recovery and lower energy consumption by pyrolyzing a thermosetting resin waste together with the thermoplastic resin waste.
CONSTITUTION: This method for decomposing waste plastics is carried out as follows. A thermosetting resin and a thermoplastic resin are stored in storage tanks 1a and 1b, respectively. The thermosetting resin and the thermoplastic resin are mixed and fed to a pyrolysis oven 2a from the storage tank at a specific ratio. They are decomposed in the pyrolysis oven 2a and condensed and liquefied in a cooler 3. A liquefied oil is recovered in an oil storage tank 4. The amount of pyrolyzed gas during the process is detected and observed by a gas flow detector 36. The pyrolyzed gas is sucked blower 5 and a non- condensed gas in the cooler 3 is exhausted from the suction blower 5. After finishing a gasification by pyrolysis in the pyrolysis oven 2a, the gasification by pyrolyzing the mixture of the thermosetting resin with the thermoplastic resin in a pyrolysis oven 2b is started. The mixture of the thermosetting resin with the thermoplastic resin is continuously treated by repeating the above mentioned operations.
YAMADA RYOKICHI
SHIMODA MAKOTO
YAMASHITA HISAO
MIYADERA HIROSHI
