Bag filter is based on the principle of filter dust removal equipment, the use of organic fiber or inorganic fiber filter cloth to filter out the dust in the gas.
1. Gravitational Sedimentation - When the dust-laden gas enters the bag filter, the dust with large particles and large specific gravity settles down under the action of gravity, which is exactly the same as that of the sedimentation chamber.
2. Thermal effects - light body small dust (1 micron), with the air movement, very close to the stream of air flow, can bypass the fiber. However, after they collide with gas molecules that act as thermal (ie, Brownian) motions, they change their original direction of motion, increasing the chances of contact between the dust and the fibers and allowing the dust to be captured. When the filter fiber diameter is thinner, the less vacancy rate, the higher the capture rate, so the more conducive to dust removal.
3. Inertial force effect - smooth flow of air filter material, can be passed around the fiber, and larger dust particles in the inertia force, still according to the original direction of movement, then collided with the filter was captured.
4. Sieve effect - When the dust particle diameter than the filter fiber gap between the open space or dust on the media gap, the dust in the smooth flow of gas is obstructing the expiration of that is blocked, which is called the sieve Filter effect. When the filter backlog of dust increased, this effect is more obvious.
Bag filters have long been widely used in various industrial sectors to capture non-binding, non-fibrous industrial dusts and volatiles and to capture dust particles up to 0.1 microns. However, when it is used to treat gases containing water vapor, condensation problems should be avoided. Bag dust removal with high purification efficiency, that is, to capture the fine dust efficiency up to 99% or more, and its high efficiency.