PURPOSE:To reduce the cost of treatments by providing a pyrolysis reaction furnace and a non-utility power generator in treating equipment, decomposing and gasifying waste plastics and using the gas as fuel. CONSTITUTION:The plastic balls screened and discharged from a high-polymer screening machine is supplied to the pyrolysis reaction furnace 36. The plastic balls are then thermally decomposed to a gaseous state in a pyrolysis furnace 42 below a hopper 41. A heating furnace 50 with a burner 45 is installed below the pyrolysis furnace 42 and the pyrolysis reaction is effected by heating the pyrolysis furnace 42 from the outside. The cracked gas is sent to a condenser 47 where the gas acts as a metal catalyst and is cooled by the effect of circulating water. The low boiling gas is thus separated. The gas is introduced through a gas holder 56 into a gas tank 57 and is used as the fuel of the burner 45. Thus, the installation conditions of the equipment are drastically relieved.
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