Fog curtain dust catching device for rectangular return airway

The utility model discloses a fog curtain dust catching device for a rectangular return airway, which comprises a fog curtain dust catching device frame, the fog curtain dust catching device frame comprises three cross beams and a vertical beam, the three cross beams are connected through two longitudinal connecting beams at two ends, one cross beam is a full-section spray generating device, and a movable hanging ring is hung on the other cross beam. The lifting ring is connected with a plurality of movable vertical bars, the movable vertical bars are connected through metal chain rings, the movable vertical bars are connected with a dust catching net, the dust catching net is divided into a left face and a right face, the lifting ring is connected with two weak magnetic metal vertical bars which can be automatically closed through magnetism, and the lifting ring is connected with two springs and two steel wire ropes through lifting hooks. The two steel wire ropes are connected and combined and then connected