Foreign matter removing device and boiler system

The utility model discloses a foreign matter removing device and a boiler system, the foreign matter removing device is used for being installed on the discharging end side of a feeder, and the foreign matter removing device comprises a hopper, a blocking piece and a filtering piece. Wherein the hopper is provided with a storage space suitable for storing slag; the blocking piece is connected with the hopper, the blocking piece has a blocking state of blocking the material slag from being output from the outlet in the feeding direction of the feeder, and in the blocking state, the material slag falls into the hopper along the blocking piece; the filter part is installed on the hopper and provided with a plurality of filter openings, and the size of the filter openings is larger than that of material residues. According to the foreign matter removing device of the structure, in the operation process of the feeding machine, materials are continuously output to the discharging end side, when impurities such as s