Dust removal bag is a kind of dry type dust removal device. It is very suitable for capturing fine and dry non-fibrous dust when used. The dust removal bag is mainly made of textile filter cloth or non-woven felt and made of fiber fabric. The filtration function filters the dust-laden gas. When the dust-laden gas enters the bag filter, the dust with large particles and large gravity settles due to the action of gravity and falls into the ash hopper. The gas containing fine dust passes through the filter material. Dust is trapped and the gas is purified.
The removal efficiency of the new filter material is generally not high enough for the dust bag. After the filter material is used for a period of time, the surface area of the filter bag gathers a layer of dust because of its impact, retention, filtration, and static electricity. This layer of dust is called In the initial stage, in the course of this movement, the primary layer became the main filter layer of the filter material, relying on the role of the primary layer, the larger mesh filter material can also obtain higher filtration efficiency.
When the dust bag is used, it will gather with the dust on the surface of the filter material. The efficiency and resistance of the dust filter increase to a certain extent. When the pressure difference between the two sides of the filter is large, some of the dust will adhere. Dust particles on the filter are squeezed in the past to reduce the efficiency of the filter.
Too high resistance of the dust collector will cause a significant drop in the air volume of the dust removal system. Therefore, after the resistance of the dust collector reaches a certain value, it is necessary to clear the dust promptly. The primary layer cannot be destroyed during cleaning so as not to reduce the efficiency. The bag filter structure mainly consists of an upper box, a middle box, a lower box (ash bucket), a dust removal system, and a ash discharging mechanism.
In addition to the correct selection of filter bag material, the dust removal system plays a decisive role in the bag filter. For this reason, the method of dust removal is one of the characteristics of the zone bag filter, and it is also an important part of the operation of the bag filter.