Secondary combustion device for incinerator

The utility model discloses a secondary combustion device for an incinerator, which comprises a lower box body, a flushing component, an ash hopper and an ash discharge pipe, the flushing assembly comprises a conveying pipe arranged on the lower box body, a flushing pipe arranged on the right side of the conveying pipe, a tip part arranged at the top end of the flushing pipe, a plurality of spray heads arranged at the bottom end of the flushing pipe and dustproof covers hinged to the bottom ends of the spray heads, fixing rods are arranged on the two sides of the ash hopper, and screw rods are arranged on the two sides of the ash discharging pipe; and the screw rod is in threaded connection with a nut. The conveying pipe can be connected with a tap water pipe, tap water can be conveyed to the spray head through the conveying pipe and the flushing pipe to be sprayed out, the ash bucket can be flushed, it is avoided that waste residues adhere to the inner wall to affect the residue discharging efficiency, meanw