1. According to the shape of the cross-section of the filter bag, it is divided into a flat bag (trapezoid and flat) and a round bag (cylindrical).
2. According to the way of air inlet and outlet, it is divided into the lower air inlet and upper air outlet and upper air inlet and lower air outlet and direct current type (only limited to plate-shaped flat bag).
3. According to the filtration method of the filter bag, it is divided into external filtration and internal filtration.
4. According to the use environment and temperature program of the filter bag, it is divided into normal temperature, medium-temperature, and high temperature.
The fiber used for the filter material includes cotton fiber, wool fiber, synthetic fiber and glass fiber, etc. Filter materials woven from different fibers have different properties. Commonly used filter materials are 208 or 901 polyester wheel flannel, the use temperature generally does not exceed 120 ℃, the glass fiber filter bag treated with silica resin, the use temperature generally does not exceed 250 ℃, cotton wool fabric is generally suitable for non-corrosive; Dust-containing gas below 80-90℃.
