Industrial precipitator or dedusting equipment is equipment that separates dust from flue gas. The bag filter is also called a filter type dust collector, which is a dry high-efficiency dust collector. It is a dust removal device that captures solid particles in dust-containing gas by using a bag filter element made of fiber braid. Its working principle is that the dust particles are intercepted due to the collision of the inertia force with the fibers when they are around the filter cloth fibers. Bag dust collector is a dry type dust removal device, which is suitable for collecting small, dry non-fibrous dust. |
The filter bag is made of woven filter cloth or non-woven felt, and the dust-containing gas is filtered by the filtering effect of the fiber fabric. When the dust-containing gas enters the bag filter, the particles with large and specific gravity settle due to gravity. When it comes down, it falls into the ash hopper. When the gas containing the finer dust passes through the filter material, the dust is trapped and the gas is purified. The dust removal efficiency of new filter media is generally not high enough. After using the filter material for a period of time, due to the effects of sieving, collision, retention, diffusion, static electricity, etc., a layer of dust has accumulated on the surface of the filter bag. This layer of dust is called the primary layer. During the subsequent movement process, the primary layer became The main filter layer of the filter material, relying on the role of the primary layer, the filter material with a 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 industrial dust collectors have increased accordingly. When the pressure difference between the two sides of the filter material is very large, some fine dust particles already attached to the filter material will be squeezed over To reduce the efficiency of industrial dust collectors . In addition, the excessive resistance of the industrial dust collector will significantly reduce the air volume of the dust removal system. Therefore, after the resistance of the industrial dust collector reaches a certain value, it is necessary to remove the dust in time. Do not destroy the primary layer when cleaning, so as not to reduce efficiency. The structure of the bag filter is mainly composed of the upper box, the middle box, the lower box (ash hopper), the ash cleaning system and the ash discharge mechanism. The performance of the bag filter is not only the correct choice of filter bag materials, but also the ash cleaning system plays a decisive role in the bag filter.
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