The filter material is usually made of cotton, wool and other natural fibers or synthetic fibers. Raw materials have different physical and chemical properties, so they cannot have complete function and resistance in temperature, humidity and chemical resistance. Therefore, as the criteria for selecting filter materials, it is necessary to fully grasp the characteristics of dusty gases (including temperature, humidity, corrosiveness, flammability and explosiveness of dusty gases), carefully compare the functions of various fibers, and make reasonable choices.
The characteristics of dust include its chemical and physical properties. The selection of raw materials, structure and post-treatment of filter materials is mainly considered from the perspective of the physical function of dust. These properties mainly include the shape and particle size distribution of the dust, the adhesion and cohesiveness of the dust, the hygroscopicity and deliquescence of the dust, and the abrasion and pecking of the dust.
The cleaning method of bag filter is a major factor in selecting the filter material structure. Due to different cleaning energy and deformation characteristics of filter bags, bag filters with different cleaning methods should use different types of filter materials with different structures.
It mainly includes high concentration dust collection process, high standard emissions and occasions with purification requirements, occasions with requirements for safe and stable operation with low resistance, treatment of viscous fine dust gas such as oil mist, and requirements for special structure dust collectors.