Patent ID: 6358480
Filing Date: 2002-03-19
Classification: C10B,C10G,Y02P

Abstract:
A plastic waste decomposing apparatus comprising:a decomposing chamber supplied with a liquid phase polymer obtained by heating plastic waste, said decomposing chamber being heatable from exterior thereof; a rotator rotatably provided in the decomposing chamber and having a shape substantially corresponding to a shape of an inner periphery of the decomposing chamber to form a reaction space between an outer periphery of the rotator and the inner periphery of the decomposing chamber wherein the rotator is provided with a cavity which can be supplied with high-temperature gas, said reaction space being formed so that the liquid phase polymer supplied into the decomposing chamber flows down in the reaction space in the form of layers; an outer casing provided outside the decomposing chamber to form a heat passage between the decomposing chamber and the outer casing, wherein said cavity communicates at its lower end with said heat passage to introduce said high-temperature gas into the heat passage, so that said reaction space is heated from both the outer periphery of the rotator and the inner periphery of the decomposing chamber; and a helical screw provided on the outer periphery of the rotator, whereby the liquid phase polymer flowing down in the reaction space is subjected to thermal decomposition while being agitated to be forced upward by the rotating helical screw, to produce a vapor component.