The present invention relates to a waste synthetic resin regenerating device (100) which comprises: a plurality of reactors (110) inputted with waste synthetic resin； a combustion furnace (120) seating and accommodating the reactor at the top end thereof, and heating the reactor with heat provided by a main burner (121) installed at one side thereof； a heat exchanger (130) installed at the other side of the combustion furnace (120) in order to heat the reactor, collecting and storing remaining waste heat, and generating hot water or steam through the collected waste heat； and a condenser (140) connected to the reactor (110) and the main burner and transmitting regenerated oil, which is generated by condensing gas generated from pyrolysis of the waste synthetic resin inside the reactor (110), as a heat supply source of the main burner (121). The present invention also relates to a drying device (200) which comprises: a drying chamber (210) having a sealing space for accommodating an object to be dried； a middle layer panel (220) dividing the inside of the drying chamber (210) into an upper layer and a lower layer； a heat supply unit (230) installed in the upper layer of the drying chamber (210) in order to release heat of far-infrared rays； and a plurality of heat circulating fans (240) installed at both sides of the drying chamber (210) so that the supplied heat circulates from the upper layer to the lower layer, and capable of automatically changing the circulating heat from normal circulation to reverse circulation by changing rotational direction thereof according to a sensor or set time. Here, the heat exchanger (130) is additionally connected to a heat supply unit (230) by a pipe in order to continuously supply the hot water or the steam stored therein, thereby supporting the heat of the drying chamber (210). Therefore, the waste synthetic resin regenerating device and the drying device can process waste synthetic resin without use of additional fuel.COPYRIGHT
