After the dusty airflow enters the lower box through the air inlet, some of it settles, and when there is slight dust floating, it is blocked by the filter bag. The purified air passes through the filter bag and enters the upper box through the Venturi tube, and is discharged from the air outlet.
The dust accumulated on the outer wall of the filter bag continues to increase. When the resistance is within the limited range (usually 80-120 millimeters of water column), the dust accumulated on the outer wall of the filter bag needs to be removed. The dust removal is carried out by the control instrument regularly triggering each control valve in sequence, opening the pulse valve, so that the compressed air in the air bag is sprayed out through the blowing pipe hole (Wu secondary air) and induced by the Venturi tube to enter the filter bag several times that of Wu secondary air (secondary air), causing the filter bag to rapidly expand at Wu moment and accompanied by the reverse effect of the airflow. The shaken dust falls into the ash door and is discharged from the body through the ash discharge valve.