Bag material for bag dust collectors
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May I ask: Are the filter bag materials used in bag filters that are currently performing well (with a flue gas temperature of around 150 degrees Celsius) all imported? Like Japan’s PPS fibers?
I’m not very familiar with this. I did some research some time ago and wanted to use bag filters; however, the flue gas is generated from burning crude oil, and it seems difficult to remove impurities from it. The manufacturers say that in cases of high temperatures, imported filters are necessary, as domestic ones have poor quality-
When the flue gas temperature is below 120°C and the filter material needs to have acid resistance and durability, polyester fleece and polyester needle-punched felt are commonly used； When dealing with high-temperature flue gas (
Fully imported ones are more expensive; currently, some filter bag manufacturers offer filter media made of PPS blends, which are cheaper, but the performance difference is not significant.
In recent years, there have been advancements in the material used for bag filters. We have a CFB boiler project that has been put on hold temporarily; the preliminary design was carried out by a coking design institute, which recommended the use of bag filters. We are concerned about the costs associated with replacement, manpower issues, and the impact on dust removal efficiency. Personally, I still prefer to use electrostatic dust removal. Friends who have experience using bag filters could please share their experiences with them. (We also used cloth bags N years ago, and the situation was terrible.)
Filter cloths are expensive, especially those that can withstand high temperatures; the cost of replacing them is very high
Polyester can be used; it is resistant to acids and weak alkalis. Or polytetrafluoroethylene, which is resistant to acids and alkalis and also performs better at high temperatures
It seems that the best domestic option is Wuxi Bidaifu
Based on our comparison of the performance of electrostatic dust removal and bag dust removal, bag dust removal proves to be more effective. Moreover, when the right materials are used for bag dust removal systems, maintenance costs and the amount of maintenance required are significantly lower compared to electrostatic dust removal. I recommend bag dust collection.
The raw materials for PPS are definitely imported, as PPS fibers cannot be produced domestically yet. Cheap PPS is made by blending imported PPS fibers with other fibers. As for whether 150°C can be used, it depends on the components in the flue gas. Send the smoke parameters to the filter media manufacturer, and their experts will get back to you.
Tetrafluoro, Fluormesh, polyester. All of them. There are also flame-retardant fabrics. It depends on your needs. There are some very good ones in the country