Spraying device capable of automatically filtering filter residues

The utility model relates to the technical field of flue gas purification, and discloses a spraying device capable of automatically filtering filter residues. Comprising a machine box, a supporting rod is fixedly connected to the upper surface of the machine box, a spraying box is fixedly connected to the end, away from the machine box, of the supporting rod, a water storage pipe is fixedly connected to the right side face of the spraying box, a guide pipe is fixedly connected to the lower surface of the spraying box, and a sealing plate is fixedly connected to the side surface of the guide pipe; a motor is fixedly connected to the upper surface of the machine box, a rotating rod is fixedly connected to the output end of the motor and located in the machine box, stirring blades are evenly distributed on the side surface of the rotating rod, a rotating seat is fixedly connected to the side surface of the rotating rod and located above the stirring blades, and the stirring blades are arranged on the rotating se