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Introduction of the method of prolonging the life of filter bag of dust collector

Filter bag is the key part in the operation of bag type dust collector, usually the cylindrical filter bag is vertically suspended in the dust collector. The fabric and design of the filter bag should try to pursue high efficiency filtering, dust stripping and durable effect. In pulse and gas box pulse duster, the dust is attached to the outer surface of the filter bag.

When the dust gas passes through the dust collector, the dust is arrested on the outer surface of the filter bag, and the clean gas enters the filter bag through the filter material. The cage frame inside the filter bag is used to support the filter bag to prevent the filter bag from collapsing, and it helps to remove and redistribute the dust cake.

The dust concentration and the continuous operation time of dust removal efficiency with the filter properties, filtration velocity, gas bag type dust collector, and these factors are interrelated and interact with each other. Therefore, in the selection of design parameters of bag filter should be comprehensive analysis and consideration. Of course, the parameters of dust collector, such as fans, wind pressure and air volume, will also directly affect the dust removal effect, which should be considered in the design and operation process.

With the research on theory and technology of bag type dust collector deeply, further research such as design parameters, filtration mechanism, material performance, equipment structure and cleaning methods of the bag type dust collector to play a greater role in papermaking industry production and environmental protection.

Matters needing attention to prolong the life of filter bag:

1. The blockage of the filter bag. When the filter bag is blocked, the resistance increases, which can be shown by the increase of the reading value of the differential pressure meter. The blockage of filter bag is the main reason that causes the wear, perforation and shedding of filter bag. The reason caused by blockage of the filter bag temporarily enhanced cleaning to eliminate the clogging of the filter bag; all or part of the installation and replacement of the filter bag; the adjustment of operating conditions.

2. The breakage of the filter bag. The shape of the filter bag and the installation method of the filter bag and the mechanism determine the location of the filter bag, which can be easily damaged, so that it can be checked and repaired. But the filter bag is damaged mainly by the following reasons. If the damage occurs, it can be checked by the following table.

3, filter bag aging. Due to the following reasons, it is necessary to investigate the causes, take measures to eliminate and replace the filter bag. 1 due to abnormal high temperature curing shrinkage; the vapor contact reaction due to acid, alkali or organic solvent, and water reaction;

4, filter cloth should not be too loose or tight, easy to loose dust, easy to pull bad.

5, the old bag should not be mixed, to avoid damage to different time affect the normal work of equipments.

6, the replacement of the filter bag, first with compressed air blowing, and then check whether there is a broken hole, there are broken holes after the repair is to be replaced. If the filter bag is dusts, rinse with water and leave to change after drying.