Denitration tower for waste gas treatment

The utility model discloses a denitration tower for waste gas treatment, which comprises a tower body, a gas inlet pipe penetrating through the periphery of the tower body, a water discharge pipe penetrating through the periphery of the tower body and close to the bottom end, a dust filtering mechanism installed in the tower body and close to the bottom end, and a catalysis mechanism installed in the tower body and close to the top end. The dust filtering mechanism comprises a collecting hopper, the collecting hopper is installed at the position, close to the bottom end, in the tower body, a connecting groove is formed in the bottom of the collecting hopper, a filter cylinder penetrates through the bottom of the tower body and is located in the connecting groove, and a first water conveying pipe and a second water conveying pipe penetrate through the periphery, close to the bottom end, of the tower body; booster pumps are mounted at the bottom ends of the first water conveying pipe and the second water convey