Return ash collecting device of belt conveyor

The utility model discloses a return dust collecting device of a belt conveyor. The return dust collecting device comprises an air blower, an air blowing pipeline, an air knife and a dust collecting box. A first air knife and a second air knife are arranged at the two ends of the air blowing pipeline respectively, the first air knife and the second air knife blow the lower surface of the return rubber belt, and the middle of the air blowing pipeline is connected with an air blower; the first air knife is located in the dust collecting box, the knife edge faces the direction of a head wheel of the rubber belt conveyor, the dust collecting box is installed between the area increasing wheel and the first lower carrier roller, and the return rubber belt penetrates through the dust collecting box. The second air knife is located below and in front of the belt conveyor head wheel. With the adoption of the device, dust brought out by the return rubber belt can be cleaned at the first time; by adopting the device, th