Working principle of bag dust collector
When dust-laden gas passes through the filter material, the dust is blocked on its surface, and clean air is discharged through the gaps in the filter material. Air filtration technology is the basic principle of bag dust collectors. Currently, the main methods used for air filtration are fiber filtration, membrane filtration (coating or thin film) and dust layer filtration. These three methods can achieve the purpose of separating solid particles in aerosols, but their separation mechanisms are different. . The structure of the bag dust collector is mainly composed of: upper, middle and lower parts, dust cleaning system and dust discharge mechanism. In addition to the correct selection of bag materials, the dust cleaning system plays an important and decisive role in the performance of the bag dust collector.
The technical characteristics of the bag dust collector are that the dust removal efficiency is as high as 99%. The dust concentration of the gas at the outlet of the dust collector is within 10mg/m2. It has such a high resolution for fine dust with sub-micron particle size and can handle it easily. The scope is very wide. It is used for flue gas dust removal in industrial furnaces, which reduces the emission of air pollution. It is not sensitive to the characteristics of dust and is not affected by dust and electrical resistance. It uses high-temperature resistant filter materials such as glass fiber and P84 and polytetrafluoroethylene. When using vinyl fluoride, it can be carried out at temperatures above 200°C. It has a simple structure and is easy to maintain. With the same dust removal efficiency, the cost is lower than that of an electrostatic precipitator.
Bag dust collector is a combination of fiber filtration, or membrane filtration and dust layer filtration. Its dust removal mechanism is the result of the combined effects of sieving, inertial collision, hooking, diffusion, gravity sedimentation and electrostatic effects.
