Common problems of dust filter bag wear

The dust filter bag is the core component of the bag filter, which plays a decisive role in the use effect of the bag filter. The dust filter bag accounts for a large proportion of the value of the bag filter, and its damage will directly affect the dust removal efficient. The air volume, dust concentration, load balance, flue gas temperature and humidity, corrosiveness and other factors of the dust removal system may cause the loss of the dust removal filter bag. Abrasion is a common problem with dust filter bags.

Where is the dust filter bag usually easy to wear?

Dust filter bag mouth

The main reason is that the compressed air blown back by pulse deviates from the center of the dust removal filter bag and directly washes the side wall of the dust removal filter bag. Under the continuous scouring of the off-side compressed air, the inner side layer of the dust removal filter bag is first blown off by the compressed air, and then the base The cloth is leaked and the filter surface is also leaked. When one side of the dust filter bag is damaged, the resistance of the damaged area will decrease, and the dusty smoke will quickly enter from the damaged area, and the damaged area will be washed diagonally, forming new cavities and new dusty flue gas buckles, which are caused by the increasing number of cavities. The bag mouth of the dust filter bag is damaged in a ring shape, and in serious cases, the bag head of the dust filter bag and the bag body of the dust filter bag are separated. This type of damage is mainly caused by the high pressure of the compressed air, the skewed injection pipe, and the deformation of the flower plate.

Dust filter bag body

1. If the traces of damage are from the inside to the outside, it means that the vertical ribs of the bag cage are unwelded or rusted, and the dust filter bag filter bag is worn off or the injection pressure is too high or the ejection is too frequent, making the dust filter bag filter bag and the bag cage Folding and breaking at the contact position causes damage. This kind of problem can be solved by replacing the dust filter bag cage or adjusting the spray device.

2. If the traces of damage are from the outside to the inside, there are traces of friction between the outside of the dust filter bag, the box structure or the adjacent dust filter bag. This type of wear is caused by deformation of the dust filter bag cage or the installation of the filter bag is too small, the diameter of the dust filter bag is too large or loose, causing the contact between the dust filter bag and the dust filter bag, the dust filter bag and the dust collector box structure, and the reaction In the blowing process, due to the expansion and friction of the dust removal filter bag, it is generally necessary to replace the bag cage and ensure the installation quality.