Bag filter is a dry dust filtering device mainly used to capture small, dry, and non fibrous dust. It separates the dust from the dusty gas through the filtering effect of the filter bag, achieving the purpose of purifying the gas. A bag filter consists of a filter bag, ash hopper, upper box body, air inlet, exhaust port, etc. The filter bag is a key component, usually made of woven filter cloth or non-woven felt. ‌

The filter bag materials of bag dust collectors are diverse, including synthetic fibers, natural fibers, or glass fibers. According to the different properties of flue gas, suitable filter materials can be selected. For example, when dealing with high-temperature flue gas, graphitized glass fiber cloth is mainly used; In some special cases, materials such as carbon fiber, glass fiber, PPS, etc. may also be used. The design and material selection of filter bags have a significant impact on the performance of dust collectors, and factors such as efficient filtration, easy dust removal, and durability need to be considered.

The bag filter has the characteristics of efficient dust removal. For particles larger than 0.1 μ m, its filtration efficiency can reach over 99%, and the equipment resistance loss is about 980-1470 Pa. Therefore, it plays an important role in industrial production and environmental protection.