Housing Bag Filter

Housing bag filter is a dry filter device. After the filter material has been used for a period of time, due to the effects of sieving, collision, retention, diffusion, static electricity, etc., a layer of dust accumulates on the surface of the filter bag. This layer of dust is called the primary layer. In the subsequent movement process, the primary layer becomes The main filter layer of the filter material depends on the function of the primary layer, and the filter material with larger mesh can also obtain higher filtration efficiency. As dust accumulates on the surface of the filter material, the efficiency and resistance of the dust collector increase accordingly. When the pressure difference between the two sides of the filter material is large, some fine dust particles that have been attached to the filter material will be squeezed. The efficiency of the dust collector is reduced. In addition, excessive resistance of the dust collector will significantly reduce the air volume of the dust removal system. Therefore, after the resistance of the dust collector reaches the value, it must be cleaned in time. The primary layer should not be destroyed when cleaning dust, so as not to reduce efficiency.

 Working principle of housing bag filter:

The high dust removal efficiency of the housing bag filter is inseparable from its dust removal mechanism. When the dust-laden gas enters the ash hopper from the lower part of the dust collector and enters the ash hopper through the deflector, due to the collision of the deflector and the reduction of gas velocity, the coarse dust will fall into the ash hopper, and the remaining fine particles will follow the gas. Entering the filter bag chamber, due to the inertia, diffusion, blocking, hooking, static electricity and other effects of the filter material fiber and fabric, the dust is trapped in the filter bag, and the purified gas escapes the bag and is discharged through the exhaust pipe. The dust on the filter bag is removed by gas backwashing. The cleaned dust goes down to the ash hopper, and is discharged to the ash conveying device through the double-layer ash unloading valve. The dust on the filter bag can also be removed by spraying pulse airflow, so as to achieve the purpose of dust removal, and the dust that is cleaned up is discharged by the dust discharge device. The high dust removal efficiency of the bag filter is also inseparable from the filter material. The performance and quality of the filter material are directly related to the performance and service life of the bag filter. The filter material is the main material for making filter bags, and its performance and quality are to promote the progress of bag dust removal technology and affect its application range and service life.

Filter type dust collectors include bag type dust collectors and particle layer dust collectors. The former usually uses filter bags made of organic fiber or inorganic fiber fabric as the filter layer, while the latter uses particles of different particle sizes, such as quartz sand, It is composed of river sand, ceramsite, slag, etc. As the powder repeatedly adheres to the outer surface of the filter bag, the powder layer continues to thicken, and the resistance value of the bag filter also increases; the pulse valve diaphragm sends a command, when the left and right flooding, the pulse valve opens, and the high pressure air bag compresses If the air is open, if there is no dust or it is too small, the mechanical dust removal work will stop working.