The structure of pulse bag type dust collector from top to bottom includes: gas purification chamber, pulse valve, electrical control system, sewage discharge device, compressed air bag, dust removal chamber, ash hopper, ash discharge valve, etc. It has been widely used in material cutting, shredding, grinding, mixing, stirring and other links in industries such as cement, building materials, medicine, chemical industry, mining and metallurgy, woodworking, solid waste disposal, etc.
Its working principle is: After the dust containing gas enters the dust collector through the air inlet, a portion of the coarser dust particles fall into the ash hopper due to inertia, collision, natural sedimentation, and other reasons. Most of the dust enters from the bottom of the dust removal room with the airflow. Due to the blocking effect of the filter bag/cartridge, the dust is blocked and left on the outer surface of the filter bag/cartridge, gradually covering and stacking to form a dust layer, further improving the filtering ability of the filter bag/cartridge for subsequent dust. Guided by the airflow of the induced draft fan (ID fan), the dust gas enters the purification chamber after being purified by the filter bag/cartridge, and is then discharged into the atmosphere through the air outlet, achieving the goals of dust control and particle recovery.
When the dust on the surface of the filter bag/cartridge continues to increase and the equipment resistance rises to the set value, the time relay (or micro differential pressure controller) outputs a signal, and the pulse control instrument begins to work. Each pulse valve is opened one by one, and compressed air is sprayed through the blowing port to clean the filter bag/cartridge. Under the action of reverse airflow, the filter bag/cartridge rapidly expands and contracts, and the dust attached to the surface of the filter bag/cartridge quickly detaches from the filter bag/cartridge and falls into the ash hopper. The collected dust is discharged by the ash discharge valve. After the spraying and cleaning of the dust is completed, the dust collector resumes normal operation. This cycle is repeated to achieve continuous filtration and purification of dusty gas.
