Working principle of cartridge dust collector
Working principle of cartridge dust collector
After the dust-containing gas enters the ash hopper of the dust collector, due to the sudden expansion of the air flow section and the effect of the air 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. After the fine-grained and small-density dust particles enter the dust filter chamber, through the combined effects of Brownian 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 and 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. First, the lift valve of a sub-chamber is closed to cut off the filtered air flow. Then the electromagnetic pulse valve is turned on, the compressed air and a short time expand rapidly in the upper box and rush into the filter cartridge, causing the filter cartridge to expand and deform and vibrate, and under the action of reverse airflow, the dust attached to the outer surface of the filter bag which was stripped and fell into the ash bucket. 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 cleaning in the first room to the beginning of the next cleaning cycle. The fallen dust falls into the ash hopper and is discharged through the ash unloading valve. In this process, the filter cartridge must be replaced and cleaned regularly to ensure the filtering effect and accuracy because being blocked during the filtration process, some of the dust will be deposited on the surface of the filter material, increasing the resistance.
