The dust-laden gas is introduced into the middle shell from the inlet by the induced draft fan, and the clean gas enters the upper shell the filter bag and the venturi tube, and is discharged from the clean gas outlet, while the dust is retained on the outer wall of the filter bag. With extension of time, the dust adsorbed on the filter bag becomes thicker and thicker, and the resistance of the filter bag becomes greater and greater. At this time the pulse control instrument sends a signal, and the program automatically controls the opening and closing of each pulse valve, so that the high-pressure gas source is sprayed into the bag through the spray hole and the venturi tube. Due to the effect of high-pressure gas, the filter bag undergoes a sharp expansion, which causes an impact, so that the dust adsorbed on the surface of the filter bag falls into the ash bin and is discharged by the ash conveying mechanism
