Rust removal device for inner wall of heat exchanger

The utility model discloses a derusting device for the inner wall of a heat exchanger, and relates to the technical field of derusting. The grinding device comprises a rack, a mixing box is arranged on the rack, a sliding plate is arranged on the rack in a sliding mode, a sleeve rod is rotatably arranged on the sliding plate, the free end of the sleeve rod is sleeved with a fixing plate, two symmetrically-distributed grinding pieces are arranged on the fixing plate in a sliding mode, and a T-shaped liquid outlet pipe is arranged in the sleeve rod; spray heads are arranged at the two ends of the liquid outlet pipe, a stirring piece and two adding pipes are arranged on the mixing box, and the mixing box communicates with the other end of the liquid outlet pipe through a liquid conveying piece. During use, mixed liquid formed by mixing white vinegar and baking soda can react with an oxidation layer, so that rust on the inner wall of the heat exchanger is dissolved, rust removal is achieved in cooperation with th