How to determine whether the PPS filter bag needs to be replaced?

How to determine whether the PPS filter bag needs to be replaced?
PPS filter bag is a kind of filter bag used for industrial particulate matter filtration, which is usually used for the filtration of flue gas, dust and other particles. The performance of the filter bag will be degraded due to the accumulation of particles after long-term use, and it needs to be replaced. The following are several methods to determine whether the PPS filter bag needs to be replaced:
1. observe the color change of the filter bag: the filter bag used for a long time will become darker because of the accumulated particles, generally from white to gray or black. When the color of the filter bag becomes significantly dark, it indicates that there is a large accumulation of particles in the filter bag and it needs to be replaced.
2. check the surface of the filter bag: gently wipe it along the surface of the filter bag with your fingers. If there is obvious dust or particle residue on your fingers, it indicates that the filtering effect of the filter bag has declined and needs to be replaced.
3. compare the outlet concentration: before replacing the new filter bag, the filtering effect of the filter bag can be judged by monitoring the particle concentration at the outlet. If the outlet concentration increases significantly, the filtering effect of the filter bag is not ideal and needs to be replaced.

4. check the differential pressure: the differential pressure refers to the pressure difference between the inlet and outlet of the filter bag, and is also one of the important indicators to judge whether the filter bag needs to be replaced. Generally, when the pressure difference of the filter bag exceeds the set value, it means that the filter bag has accumulated a large amount of particles and needs to be replaced.
5. routine replacement cycle: the routine replacement cycle of PPS filter bag can be determined according to the use experience and relevant regulations. Generally, the routine replacement cycle of filter bag is 6 months to 1 year. If the cycle is exceeded but there is no obvious decline in the filtering effect, it can still be used; If the performance of the filter bag decreases significantly during this cycle, it needs to be replaced in advance.
In a word, whether the PPS filter bag needs to be replaced can be judged by observing the color change, checking the particle residue on the surface of the filter bag, comparing the outlet concentration, checking the differential pressure and according to the conventional replacement cycle. In different situations, it may be necessary to comprehensively consider a variety of factors to determine whether to replace the filter bag, so as to ensure the environmental cleanliness and production efficiency in the industrial production process.