In order to respond to the national environmental protection, the bag filter has emerged at the historic moment, and the filter material in the bag filter plays a very important role in actual operation. Therefore, we must be very careful in the selection of the filter material for the bag filter. Share how to choose a bag filter material.
The selection of filter materials for bag filter should be based on the level and size of dust-containing gas temperature, moisture content, acid, alkalinity, dust viscosity, concentration and corrosivity. ? Generally, it is selected according to the temperature of the dust-containing gas when the water content is small and there is no acid. At room temperature or ≤130 ° C, polyester needle felts of 500 ~ 550g / m2 are commonly used. <250 ° C, use aramid Normex needle felt or 800g / m2 glass fiber needle felt or 800g / m2 weft double glass fiber fabric or FMS high temperature filter material (fluorine-containing gas cannot be used Fiberglass material).
When the moisture content is large and the dust concentration is large, it is suitable to use waterproof and oil-proof filter materials (also known as anti-condensation filter materials) or membrane filter materials (the base fabric should be needle-punched felt with waterproof treatment). When the dust-containing gas contains acid and alkali, and the gas temperature is ≤190 ° C, Layton (Ryton polyphenylene sulfide) needle felt is often used. When the gas temperature is less than or equal to 240 ° C and the requirements for acid and alkali resistance are not too high, P84 (polyimide) needle felt is used. When the dust-containing gas is flammable and explosive gas, use anti-static nylon needle felt. When the dust-containing gas has both a certain amount of moisture and flammable and explosive gas, use water-proof, oil-proof and anti-static (three-proof) Polyamide needle felt.
The above is the selection method of the filter material of the bag filter. According to this method, I believe that everyone can choose a better bag filter.
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