Although the dust removal effect of the bag filter is affected by many factors, it mainly depends on the filter material. The filter material of the bag filter is a cloth or felt woven from synthetic fibers, natural fibers or glass fibers. The cloth or felt can be sewn into a cylinder or a flat shape according to the needs, which improves the practicability of the dust collector. At the same time, the filter material that meets the application conditions can be selected according to the properties of the flue gas to improve the selectivity of the dust collector. Generally, when the temperature of the flue gas is lower than 120 ° C and the filter material must have acid resistance and durability, polyester fleece and polyester needle felt should be used at this time; when the flue gas is high, graphitized glass silk cloth should be used ; In many special cases, carbon fiber filter material is used.
The working mechanism is that when dusty flue gas passes through the filter material, the filter material relies on inertial collision to adsorb larger particles of dust. The finer dust is mainly filtered by diffusion and sieving, and the dust layer of the filter material is also certain. Filtering effect. It is very important to control the speed of flue gas passing through the filter (called filtering speed) during the operation of the pulse bag filter. Generally, the filtration speed is 0.5-2m / min. For particles larger than 0.1µm, the efficiency can reach more than 99%, and the resistance loss of the equipment is about 980-I470Pa.