What is the working principle of reverse blowing bag filter?

When the back-blowing bag filter works, the dust attached to the filter bag increases continuously, and when the resistance rises to the specified value, the dust cleaning begins. The ash cleaning mode of the equipment depends on the cavity blowback mode. When backblowing, close the exhaust pipe, open the backblowing pipe, and cut off the axial suction of single-chamber negative pressure. Because the air inlet pipes of each room of the equipment are connected and in a negative pressure state, due to the negative pressure axial suction effect of adjacent rooms. The air flow is sucked into the filter bag chamber through the reverse blowing pipe, passes through the filter bag, enters the inner side from the outer side of the filter bag, passes through the ash hopper and the air inlet pipe of the chamber, and is sucked into the adjacent chamber to be discharged, at this time, the filter bag is deflated. The dust accumulated in the filter bag is then shaken off to the ash hopper, and the single chamber is cleaned. Under the control of the cleaning actuator, other chambers are cleaned in the same order, and when a certain value is reached, the cleaning stops.