Structural form:
- According to the shape of the filter bag, it is divided into: flat bag (trapezoidal and flat shape) and round bag (cylinder type).
- According to the inlet and outlet air mode, it is divided into: lower inlet air, upper air outlet, upper inlet air and lower air outlet and direct flow type (limited to plate flat belt)
- According to the filtration method of the bag, it is divided into: external filter type and internal filter type filter material fiber, cotton fiber, wool fiber, synthetic fiber and glass fiber, etc., and the filter material woven by different fibers has different properties. Commonly used filter materials are 208 or 901 polyester wheel flannel, the use temperature is generally not more than 120 °C, after silicon diamond resin treatment glass fiber filter bag, the use temperature is generally not more than 250 °C, cotton wool fabric is generally suitable for non-corrosive; The temperature is below 80-90 ° C containing dusty gases.
Key features:
1、The dust removal efficiency is high, generally above 99%, and the dust concentration of the gas outlet of the dust collector is within tens of mg/m3, and it has a high classification efficiency for fine dust of submicron particle size.
2、The range of treatment air volume is wide, the small one is only 1min m3, the large one can reach 1min tens of thousands of m3, used for smoke 4 dust removal in industrial furnaces, reduce the emission of air pollutants.
3、Simple structure, easy maintenance and operation.
4、Under the premise of ensuring the same high dust removal efficiency, the cost is lower than that of electrostatic precipitator.
5、When using high temperature resistant filter materials such as Bobin fiber, polytetrafluoroethylene and P84, it can operate under high temperature conditions above 200 °C.
6、It is insensitive to the characteristics of dust and is not affected by dust and resistance.
Description
The bag filter is a dry dust filter device. After the filter material is used for a period of time, due to the effects of sieve filtration, collision, retention, diffusion, static electricity and other effects, the surface area of the filter bag accumulates a layer of dust, this layer of dust is called the primary layer, and the initial layer becomes the main filter layer of the filter material in the process of movement after that, relying on the role of the primary layer, the filter material with larger mesh can also obtain higher filtration efficiency. With the accumulation of dust on the surface of the filter material, the efficiency and resistance of the dust collector are correspondingly increased, when the pressure difference between the two sides of the filter material is very large, some fine dust particles that have been attached to the filter material will be squeezed over, so that the efficiency of the dust collector decreases, in addition, the Yang force of the dust collector is too high will make the air volume of the dust removal system significantly decrease. Therefore, after the resistance of the dust collector reaches a certain value, it is necessary to clean the ash in time. The primary layer should not be destroyed during cleaning to avoid a decrease in efficiency.
