The replacement of newly installed filter bags will be completed within less than three months. Regardless of whether the dust filter bags are of high or low quality, the process will take no more than three months.

The bags will not break when aged, and they have already been in service for over a year. Many manufacturing enterprises use biomass fuels as boiler fuels, such as bamboo shavings, usable wood chips, corn cobs, etc. When these biomass materials are burned, a large number of re-combustible charcoal dust particles are generated in the flue gas. As a result, the baghouse dust collector accumulates excessive carbon and charcoal powder, which can lead to heat accumulation, spontaneous combustion and filter bag burnout. In addition, sparks may enter the baghouse dust collector and cause smoldering. As the smoldering area expands, the dust trapped inside the collector will catch fire, burning the filter bags and thus causing bag burnout for the manufacturing enterprises.

Causes of filter bag burnout by sparks:
1. The boiler is a 6-ton heating steam boiler, fueled by bamboo residues (including bamboo powder and bamboo chips).
2. There are a large number of spark-carrying dust particles in the dust removal pipeline, and the flue gas generated by the boiler has a high dust content, which is normally around 10% (most sparks will extinguish when the dust content is below 8%). In reality, many boilers fail to meet this parameter, resulting in excessively high oxygen content and thus providing an aerobic environment for combustibles.
3. Coupled with the airtightness of the system and the compressed air used for bag cleaning, the oxygen content will become even higher, allowing sparks to burn freely in the pipeline.
4. Not only can sparks burn freely, but the dust in the dust removal system is also incompletely combusted. Bamboo charcoal powder is a flammable material with an ignition point of 320℃. The bamboo charcoal powder deposited on the surface of filter bags has a heat absorption function, which causes the powder itself to accumulate heat and eventually ignite, burning the filter bags.
5. The entire process of filter bag burnout by sparks: Sparks and bamboo charcoal powder are adsorbed on the surface of filter bags at the same time. Some sparks are fanned, igniting the surrounding bamboo charcoal powder and gradually expanding the combustion area. When the boiler is shut down and restarted, the oxygen content can easily reach 17%-20%, which acts as a combustion enhancer, burning the filter bags and resulting in fire hazards.