The filter bag is the key element to determine the dust removal efficiency and working temperature of the bag filter. The cost of replacing the filter bag is the main maintenance cost of the bag filter. Therefore, the working life of the filter bag relates to the operating status and cost of the filter.
To extend the life of the filter bag:
First, choose the right filter
1. Selection of filter media should be based on the temperature and chemical characteristics of the gas; particle size, weight, shape, whether or not honing and dust concentration, filtration speed, cleaning method, emission concentration, and bag filter operating system and other factors Considering.
2. Under normal circumstances, pulse jet bag filter is selected for needle felt. Chamber blew bag filter or mechanical vibration bag filter is made of woven cloth.
Second, design a reasonable structure
1. The structure of the filter bag should meet the requirements of the filter and dust removal of the bag filter matched with it, and it is easy to install and seal reliably. The corresponding filtration area and good filtering state are pursued, and the dust removal is easy to avoid as far as possible. Coordination with relevant parts is reasonable.
2. If the outer filter type synthetic fiber filter bag and the frame should be loosely fitted, the outer filter type glass fiber filter bag should be closely matched with the small distance vertical bar frame; the inner filter type bag should consider and set the filter bag tension.
Three, superb sewing technology
1. The technology is advanced, the sewing size meets the design requirements, and the heat shrinkage size is reserved according to the filter type and the use temperature;
2. Complete equipment, reasonable stitch length, no skipping stitches, broken stitches, sutures meet the requirements;
3. The accessories are of high quality, with reasonable, no burr or broken damage to the filter bag;
4. The entire filter bag is free from defects such as pinholes, skipping yarns, and stains, and has proper packaging. It is not damaged or damp during storage and transportation. Fiberglass filter bags should not be heavily compressed and the storage period is too long, otherwise it will affect the service life.
When the bag filter is in operation, sudden abnormal conditions should be prevented, such as sudden increase in gas temperature, or entry of corrosive gas, or sudden drop in gas temperature below the dew point, etc., subject to temperature, humidity, chemical corrosion, mechanical wear Or impact and other factors ultrafiltration bag damage and damage.