Dust removal methods and selection requirements of dust collectors from dust removal equipment manufacturers
Different types of dust collectors have different dust removal effects when they are used. For equipment with unstable or fluctuating dust removal systems, it is necessary to pay attention to the effect of flue gas treatment changes on the dust removal efficiency during use. During normal operation, The efficiency of the dust collector is bag dust collector, electric dust collector and other equipment.
The dust collector is effectively selected according to the nature of the gas when selecting it. When using it, factors such as the air volume, temperature, composition, and humidity of the gas must be considered. The electrostatic precipitator is suitable for purifying flue gas with large air volumes and temperatures <400 ° C , It will not be limited by the amount of smoke when using it.
Flue gas should be cooled before cooling. Bag dust collectors should not be used. Bag dust collectors should not be used to handle high humidity and oily flue gas purification. Flammable and explosive gas purification is suitable for wet dust collectors. Cyclone dust collectors have limited air volume. When the air volume is large, multiple dust collectors can be used in parallel.
The dust collector will not be affected by its dust and resistance when in use. The impact of its dust concentration and particle size on the efficiency of the dust collector is very significant, but the impact on the bag type dust collector is not significant. When it is high, a pre-dusting device should be installed in front of the electrostatic precipitator.
The dust removal method and filtering wind speed of the dust collector depend on the nature of the dust; the wet dust collector is not suitable for purifying hydrophobic and hydraulic dust: the true density of the dust has a significant impact on the gravity dust collector, inertial dust collector and cyclone dust collector; For newly attached dust, it is easy to cause pitting or blockage on the dust collector's working surface. Therefore, it is not suitable to use dry dust removal; when the dust is purified and encounters water, it can produce flammable or explosive mixtures. Wet dust collectors should not be used.
In the process of using the bag type dust collector, its dust removal efficiency is relatively high. Generally, it is generally above 99%. The dust concentration at the outlet of the dust collector is within tens of mg / m3. Fine dust has higher classification efficiency.
The bag filter has a wide range of air volume. The small one can be used for dust removal in industrial furnaces and m3, reducing the emission of atmospheric pollutants. The structure of the entire equipment is simple and easy to maintain and operate, which can ensure the same high dust removal. Under the premise of efficiency, its cost will be lower than that of the electrostatic precipitator.
In the process of using the bag filter, glass fiber, polytetrafluoroethylene and other high temperature resistant filter materials will be used. The entire equipment can be operated at high temperature above 200 ° C. It is not sensitive to the characteristics of dust and is not affected by dust and resistance. Impact.
The bag type dust collector effectively adopts a mechanical device, so that the bag filter will generate its vibration and dust. The bag type dust collector has a non-compartment structure suitable for gap work and a compartment structure suitable for continuous work. .
The bag type dust collector effectively adopts a compartment structure, and uses its valve to switch the air flow from room to room. Under the effect of reverse air flow, the bag filter is forced to shrink or bulge and clean. A high-pressure fan or compressor is used to provide back-blow air flow, and back-blow through a moving nozzle.
Bag-type dust collectors are mainly powered by compressed air during operation. The entire equipment uses compressed air to release compressed air in an instant, which causes the filter bag to swell sharply. The bag dust is removed by shock vibration and reverse airflow Device.