The present invention relates to a method and apparatus for recycling waste plastics through subcritical saturated steam treatment. It includes a hydrothermal treatment step of processing to form a solid and a recycling step of separating the solid into a recycled material and a fuel material in the separation unit, and the pretreatment step is a pulverization step of pulverizing the waste plastic in the pretreatment unit, in the steam supply unit connected to the pretreatment unit The method further includes a steam input step of inputting steam to the pretreatment unit and a specific gravity increase step of increasing the specific gravity by drying the waste plastic through steam. According to the present invention, the mixed waste plastic through the first reactor reduces the volume by about 5% compared to before the reaction, so that it can be easily treated, and the steam recovered from the inside of the first reactor can be reused, so it is mixed It is possible to significantly reduce the cost required to dispose of waste plastics, and since fuel materials that are not classified in the first reactor are separately classified through a separation unit, environmental pollution problems caused by scattering of fuel materials are prevented in advance can do.
展开▼
