How to choose a high-quality bag filter?

How to choose a high-quality bag filter?

1. When selecting the type of dust collector, the first thing is to accurately grasp the dispersion degree of the dust. For example, if the particle size is more than 10υm, a cyclone dust collector can be selected. In the case of particle diameters of several microns or less, electrostatic precipitators and bag precipitators should be selected, and the specific choices can be made based on the degree of dispersion and other requirements by referring to the common types of dust collectors and performance tables. The type and performance of the dust collector introduced are determined. 

Dust density also has a great impact on the dust removal performance of the dust collector. The most obvious manifestations of this effect are gravity, inertial and centrifugal precipitators. A common feature of all dust collectors is that the smaller the bulk density, the more difficult the separation and capture of dust particles, and the more serious the second fly of dust, so special measures should be taken in operation and equipment structure. 2. In principle, dry dust removal equipment must be carried out at a temperature above the dew point of the dust-containing gas. In wet dust collectors, due to water evaporation and condensation after being discharged to the atmosphere, it should be treated at as low a temperature as possible. In the filter cartridge dust collector, the temperature for directly or indirectly processing the dust-containing gas should be reduced below the heat resistance temperature of the filter cloth. The operating temperature of glass fiber filter cloth is generally below 260 ° C. Other filter cloths are between 80 and 200 ° C.

3. The amount of processing gas is the decisive factor for the size and type of the dust collector. For the amount of air, you must choose a dust collector that can handle the amount of air. If multiple dust collectors that handle small amounts of air are used in parallel, it is often uneconomical. For a smaller gas volume, it is necessary to compare which type of dust collector is the most economical and the easiest to meet the requirements of the control of the dust source and the environmental requirements of dust emission.

 4. In the cyclone dust collector, the dust adheres to the wall due to the centrifugal force, and there is a danger of clogging; the dust adhered to the bag dust collector can easily block the filter bag holes, and the electrostatic precipitator is easy to make the electrode and the collector The dust is extremely dusty.

5. The greater the dust concentration in the inlet, the higher the dust removal efficiency. However, this will increase the dust concentration in the outlet. Therefore, you cannot generalize that the dust treatment effect is good only from the high dust removal efficiency. For wet-type dust collectors such as air cleaners, the initial dust concentration is preferably below 10g / m. For bag dust collectors, the lower the dust concentration, the better the removal performance, at higher initial concentrations. With continuous ash cleaning, pressure loss and discharge concentration can also meet environmental protection requirements.