Closed feeding device of pyrolysis gasifier

The invention belongs to the technical field of pyrolysis gasification furnaces, and discloses a pyrolysis gasification furnace closed feeding device which comprises a cylindrical body, a feeding port is formed in the top of the cylindrical body, and a sealing cover is arranged at the feeding port; an upper rotating disc and a lower rotating disc are rotationally connected into the cylindrical body in a sealed mode, the part above the upper rotating disc and the lower rotating disc is a waste throwing chamber, an upper discharging hollowed-out part is arranged on the upper rotating disc, and a lower discharging hollowed-out part is arranged on the lower rotating disc. When the upper rotating disc and the lower rotating disc rotate asynchronously, the positions of the upper blanking hollowed-out parts and the lower blanking hollowed-out parts correspond to each other or are staggered to realize opening and closing of blanking, and when the upper blanking hollowed-out parts and the lower blanking hollowed-out p