What dust filter bag is used in asphalt mixing station?

Selection of filter bag: The bag filter is a kind of function that uses organic fiber or inorganic fiber filter cloth to filter the solid dust in the dust-containing gas in the filter bag, inertial collision, interception, diffusion, static electricity, gravity sedimentation, etc. A kind of high-efficiency dust removal equipment separated by the following, the quality of the bag is directly related to the efficiency of the dust removal system. Superb sewing technology and the selection of suitable high-quality filter materials are the key to protecting the high efficiency of the system. The development of domestic filter materials is synchronized with the development of bag dust collectors. The filter materials for dust removal of asphalt mixing equipment are mainly Nomex needle felt filter materials and aramid needle felt filter materials.

If the asphalt mixing equipment uses heavy oil, coal or other impurity oil as fuel, it is necessary to post-process the NOMEX needle felt filter material in different ways to adapt to different use requirements, especially using high sulfur heavy oil and impurity oil as fuel , Or the moisture content of the raw material is high, which causes the dust of the asphalt mixing plant to be sticky, and the flue gas component has strong acidity. The NOMEX needle-punched felt filter material with acid-proof, oil-proof and waterproof treatment can greatly improve the wear resistance, high temperature resistance, acid and alkali resistance, hydrolysis resistance and dimensional stability of the NOMEX filter material, and improve the cleaning of the filter bag. Ash performance and dust removal efficiency and bag service life. Therefore, NOMEX (polyaramide) high-temperature needle-punched felt filter material is one of the ideal filter materials for the dust collector of asphalt equipment and the service life can reach more than 2 years.

Temperature control: Generally the NOMEX filter bag bears a temperature of 200℃, so the inlet temperature of the treatment facility should be controlled below 200℃. When the flue gas passing through the smoke pipe reaches the dust collector box, the temperature can be reduced to 200℃ the following. In order to protect the bag from accidental damage, a safety valve is installed on the flue at the entrance of the bag filter, and high and low temperature protection devices are provided to prolong the service life of the filter bag.