After the dust-containing gas enters the dust hopper of the dust collector, due to the sudden expansion of the air flow section and the effect of the air flow distribution plate, a part of the coarse particles in the air flow settle in the ash hopper under the action of dynamic and inertial forces; the fine-grained and low-density dust particles enter the dust filter chamber, through the combined effects of diffusion and sieving, the dust is deposited on the surface of the filter material, and the purified gas enters the clean air chamber and is discharged by the exhaust pipe through the fan.
The resistance of the cartridge filter increases with the increase of the thickness of the dust layer on the surface of the filter material. Clean the dust when the resistance reaches a certain specified value. At this time, the PLC program controls the opening and closing of the pulse valve, the one-chamber lift valve is closed to cut off the filtered air flow, and then the electromagnetic pulse valve is opened, the compressed air and a short period of time expand rapidly in the upper box, pour into the filter cartridge, and expand the filter cartridge.
The deformation produces vibration, and under the action of the reverse air flow, the dust attached to the outer surface of the filter bag is peeled off and falls into the ash hopper. After the dust removal is completed, the electromagnetic pulse valve is closed, the poppet valve is opened, and the chamber returns to the filtering state. The cleaning is carried out in each chamber in turn, from the beginning of the cleaning of the chamber to the beginning of the next cleaning is a cleaning cycle. The fallen dust falls into the ash hopper and is discharged through the ash unloading valve.