The surface smoothness of the filter material has a significant impact on the dynamic operating resistance of the filter material. The initial resistance of high-temperature needle punched felt filter material is determined by the permeability of the filter material itself, and the resistance during operation is many times greater than the initial resistance. The operating resistance depends on the smoothness of the surface of the filter material, the cleaning effect, etc. It is generally hoped that when the filter material ensures the same filtering efficiency, the greater the air permeability, the better, that is, the lower the resistance, the better. This can save a lot of energy. In dust collectors that use air flow reverse blowing for cleaning, when using the same pressure and air flow for cleaning, the cleaning effect of using fabrics with high air permeability as filter bags is achieved, It is better to choose fabrics with low breathability.
Therefore, while ensuring high filtration accuracy of the filter material, how to improve the permeability and surface smoothness of the filter material, reduce dust adhesion, and reduce operating resistance is the first topic that filter material manufacturers should study. We have developed a surface resin based smooth finishing needle punched filter felt, which has a permeability higher than that of ordinary pressure finishing filter materials by more than 50%, and the surface smoothness is smoother and smoother than that of pressure finishing.
The permeability ranking of the same precision clean filter material measured in the laboratory is: gas burning treatment material>easy cleaning treatment filter material>ordinary pressure light filter material. In actual operation, the order of resistance from small to large is easy to clean ash treatment filter material<singeing treatment filter material<ordinary pressure light filter material. Therefore, due to the smooth surface, good breathability, and low resistance of needle punched filter felt with easy dust removal treatment, it has become a good filter material in industrial dust removal.
