The primary condition for the selection of the type is the dust removal method of the bag type dust collector, which determines whether the filter material of the dust collector bag is woven fabric, needle felt or compressed felt.
The characteristic of this kind of dust cleaning method is that the kinetic energy applied to the dust layer is smaller than that of pulse spraying and reverse blowing type, which is a low-energy type of dust removal. Therefore, it is suitable for fabric cloth dust collector bags, and the transmission of flexible vibration waves is better.
This kind of dust cleaning method usually uses fabric dust collector bag, but it can also use a lighter cloth, with rich softness and a small size change range. Among them, fiberglass filter bags are mostly used, and most of them are used in large bag type dust collectors. The hoisting, sewing and other procedures of the cloth dust collector bag have certain requirements. If you do not pay attention, it will have a greater impact on the service life of the dust collector bags.
It is a typical way to filter out dust. The dust-removing power is very strong, and the residual amount of dust attached to the yarn of the dust-removing bag is relatively small. The dust-removing bag used is generally felt or needle felt. Under the action of pulse blowing, the cloth dust collector bag will instantly become very large, and the stress will be great. Therefore, a relatively strong filter material must be used. The cloth dust collector bag and the skeleton are often rubbed, so it is necessary to use a dust-removing filter bag with better abrasion resistance.
Since the dust removal performance of this method is quite good, the cloth dust collector bag is required to have good rigidity, small pores, and good abrasion resistance. In this way, when the blowing air ring reciprocates up and down, the cloth dust collector bag remains unchanged and will not fluff. Therefore, the use of felt or needle felt is limited. Moreover, thick and dense felt materials are required.
The kinetic energy exerted by this method on the dust is in the middle of the high-energy type and the low-energy type. This kind of dust removal requires the filter material of the dust collector bag to have flexibility and also require a certain degree of rigidity.
When using fabric dust collector bag, satin and twill fabrics are suitable. However, in consideration of dust removal efficiency, filtration speed, and abrasion resistance to the skeleton, it is appropriate to use needle felt, and woven fabrics are rarely used. If necessary, various surface treatments should be done.