Influencing factors of filtration efficiency for air dust filter bags

1. Breathability

 Air permeability refers to the amount of gas passing through the filter material per unit area under a certain pressure difference, and generally refers to the air permeability of a clean dust bag. The air permeability of high temperature dust removal cloth bags depends on the fineness of the fiber, fiber type and textile surface method. The resistance of the high temperature dust bag is directly related to the air permeability. The greater the air permeability, the lower the resistance of the dust bag. When dust sticks to the surface of the high-temperature dust bag, the air permeability will decrease, and the resistance of the dust bag will increase a lot. Therefore, it is necessary to ensure that the high-temperature dust bag can achieve higher filtration accuracy, improve the air permeability and surface finish of the dust bag, reduce the adhesion and adhesion of dust, and reduce the running resistance is a problem for manufacturers to consider. 

2. Dustproof ability 

Dust capacity, also called dust load, refers to the amount of dust accumulated per unit area of the dust bag when it reaches a given resistance value. The dust holding capacity of the high temperature dust bag also affects the running resistance and the cleaning cycle. In order to avoid frequent dust removal of the bag-type vacuum cleaner, a larger dust holding capacity of the dust bag is usually required. The dust removal capacity of the high temperature dust removal cloth bag is also related to the air permeability of the bag. Generally speaking, felt filter material has greater dust removal capacity than fabric filter material.

3. Filtration efficiency

 The filtration efficiency of the high temperature dust removal cloth bag is related to the structure of the filter material. The filtering effect of short fibers is higher than that of long fibers. The felt filter material is higher than the fabric filter material. In addition, the filtration efficiency of high temperature dust removal cloth bags is also related to the dust formed on the filter material. If the dust layer is destroyed due to frequent dust removal, the dust removal efficiency of the thin filter material will be greatly reduced, and after the thick filter bag filter material is used for dust removal, part of the dust is still in the filter material. When we choose high temperature dust removal cloth bags, we must choose according to the dust removal environment. If the selected high temperature dust bag is not suitable for dust removal environment, the filtration efficiency will be affected. In addition, be sure to buy a good quality dust bag. 

4. Service life 

The service life value of the high temperature dust bag is the time required to replace the dust bag when the dust bag is damaged under normal use conditions. Different dust bags have different service life. The nature of the dust in the flue gas, flue gas temperature, excessive wind speed of the dust collector and the quality of the dust bag will affect the service life of the dust bag. In order to prolong the service life of the dust bag, a dust bag with good quality and suitable for the nature of dust and flue gas temperature must be selected. At the same time, the overspeed wind speed and dust removal cycle should be controlled. The service life of the dust bag is related to the maintenance cost of the vacuum cleaner. The longer the service life of the high-temperature dust-removing cloth bag, the lower the replacement and maintenance costs of the high-temperature dust-removing cloth bag.