The bag breakage of the bag filter is a common cause of the decrease of the dust collection efficiency of the bag filter. Common causes of the bag damage are:
1.the filter bag to prevent the collapse of the ring caused
Some manufacturers are tamper-proof filter bag anti-snapping ring processing technology, not in strict accordance with the contract or national regulations of the production process, such as the provisions of the processing process is the 20th wire processed into a ring, the interface is welded and smooth with electric welding. The manufacturer changed the process to the tamper-proof ring. The joint was not welded by electric welding but riveted with a brass sleeve. Because the steel wire and brass are different in hardness, toughness, expansion coefficient, etc., after a short time of operation, the flood prevention ring excuse a large number of fractures in the copper riveting sleeve. At the same time, as the bag filters and blows back, resulting in deformation of the tamper-proof ring, the transformed tamper-proof ring punctures the filter bag, and a large amount of smoke passes through the puncture site to make a short-circuit, resulting in rapid damage to the filter bag.
2. there is a problem with the bag installation process
In the process of handling and installation, the fiberglass cloth bag was randomly dragged, folded, stepped on, and the nozzles of the lower flower plate were not ground carefully, and the bag was not bundled in a standard manner, causing some bags to be damaged prematurely.
3. the bag itself has defects
Small bags have defects, jumpers, and especially jumpers, which can be damaged early in the run.
4. bag tension spring failure
Some bag filters use an internal filter type bag filter. The cloth bag is suspended above the filter chamber and hangs down on the nozzle plate. The elongation of the glass fiber bag is 5%. Therefore, an adjustable spring is arranged above the suspension bracket to maintain the tension of the bag. The bag filter with this kind of structure must satisfy the requirements. In practical application, it is found that some bags of bag filter are damaged due to spring failure. The main cause of spring failure is that the spring heat treatment process does not meet the requirements, resulting in The spring loses its elasticity when it runs for a period of time in the flue gas temperature environment.
In addition to the above situations and factors considered, bag replacement should be normal.