After the resistance of bag filter and boiler dust collector reaches a certain value, it is necessary to clear the dust in time. The initial layer cannot be destroyed during ash removal to avoid efficiency reduction. The structure of the bag filter is mainly composed of the upper box, the middle box, the lower box (ash hopper), the ash cleaning system and the ash discharge mechanism. The performance of the bag filter is good or bad, in addition to the correct selection of filter bag materials, the dust removal system plays a decisive role in the bag filter. For this reason, the cleaning method is one of the characteristics of the bag filter, and it is also an important part of the operation of the bag filter.

1. dust removal equipment shall have the following repair prerequisites:

① The content of repair refers to the equipment defects found and confirmed during the operation of the equipment;

② Repair works on existing parts;
③ Generally, it should be handled synchronously in equipment maintenance so that small defects cannot be handled in shifts, medium defects cannot be handled in days, and large defects cannot be handled in 3 days.
The main repair contents of small repair of 2. dust removal equipment include the following aspects:
① Repair of air leakage, oil leakage, water leakage and other defects caused by insufficient fastening and poor sealing;
② Due to the installation error of the transmission system, the equipment operation "stuck, touch" repair;
③ Replacement of spare parts due to damage of equipment parts;
④ Local improvement repair due to structural defects of existing equipment;
⑤ Zero star repair due to other reasons.
3. measures:
① The repair content should be clear, and the equipment maintenance should be combined with the synchronization, and the technical performance should be restored in place;
② Before the start of the repair project, the repair plan should be scientific, effective measures should be taken, and the disease should be eliminated by hand;
③ minor repair items with safety requirements should be handled during shutdown.