Commonly used filter chemical treatment
1, singeing and calendering
Dust particles have attached to other dust particles or other objects with the surface contact with each other. When suspended dust particles come into contact with each other, they adsorb to each other and condense together. Dust cohesion and the type of dust particles, shape, particle size distribution, moisture content and other surface characteristics of a variety of factors, characterized by the angle of interest, usually 30 ° -45 °. Repose less than 30 ° known as the low adhesion, good fluidity, for such dust must be used singeing surface of the filter media to increase the surface area of the filter media, filter media to increase the dust capture rate, but also have Conducive to cleaning such dust from the filter when the deep blowing; angle greater than 45 ° known as the high adhesion, poor fluidity, for such dust must use the surface of the calendered filter media to improve the filter surface smooth Degree, increase the dust collection rate of the filter surface, to prevent such dust into the filter deep cleaning difficulty.
2, antistatic treatment
Some of the dust dispersed in the air (or combustible gas) ignites in the event of a spark at a particular concentration. So for flammable and explosive dust should be selected by the anti-static treatment of the filter cloth. Antistatic filter cloth is mixed with conductive fibers in the filter cloth fiber, so that it has three-dimensional conductive properties (body resistance less than 107Ω). Commonly used conductive fibers are stainless steel fibers and modified (charcoal) chemical fibers. Stainless steel fiber conductive performance is stable and reliable, modified chemical fiber after a certain period of time conductive performance is easy to decline.
3, waterproof and oil treatment
Wet and dusty gas (especially for water absorption, deliquescence dust) will make the filter bag surface dust trapped wet adhesion, or even cause the bag. This is the most taboo bag filter. To deal with this, the waterproof and oil-repellent fabrics should be treated so that each single fiber has hydrophobicity and lipophilicity, which increases the surface tension of the filter material and effectively combines the dewed water beads and the ash into a bead, Permeate the filter media, blocking the filter capillary channel, thereby avoiding the resulting dew condensation paste bag phenomenon.
4, easy cleaning treatment
The pebability of the dust is related to the nature and shape of the dust, the speed of the airflow carrying the dust, and the dust concentration. Rough surface irregular sharp edge irregular particles than the smooth surface of the pearl pecking nature of large 10 times. Dust particles with a particle size of about 90 microns have the highest wear and tear, while the wear is very weak when the particle size is reduced to 5-10 microns. Aluminum powder, silicon powder, carbon powder, sinter powder belong to high wear dust. Pebble-proof dust must be selected for easy wear-resistant ash-treated filter cloth. The surface of the silicon oil graphite, polytetrafluoroethylene resin and other easy to clean the filter can improve the wear-resistant folding filter.
5, Teflon ® coating treatment
When the dust particle size is less than 1 micron, or the dust has a great viscosity, or gas-containing humidity is high, ordinary filter media can not effectively filter. Polytetrafluoroethylene (Teflon ®) as the raw material of microporous film composite filter, with high filtration precision, smooth surface, will not adhere to dust, easy to dust dust will not penetrate into the filter inside, to achieve the surface filter.
浙江天台丰顿滤料有限公司是一家专业从事：液体过滤袋、工业滤布、滤布、滤袋、除尘袋生产销售的滤布厂家，多年来在液体过滤袋、滤袋、工业滤布、除尘袋生产上积累了丰富的经验和领先的技术。
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