1, the principle of choice Media generally follow the following principles:
A filter performance should meet the general conditions and special requirements of the production conditions and dust removal process.
B as long as possible to choose the filter life, in order to achieve the best price.
C gas properties, dust properties and cleaning methods, should seize the main factors to choose filter media, such as high temperature gas, combustible dust and so on.
D filter selection of various factors should be economic comparison.
E According to the choice of dust gas properties
Gas temperature Dust temperature is an important factor in filter material selection. Usually less than 130 ℃ dust gas called the room temperature gas, more than 130 ℃ gas called high temperature gas, so the filter can be divided into two categories, namely the room temperature filter below 130 ℃ and high temperature above 130 ℃ Filter. Gas Moisture The wet gas trapped the dust trapped on the surface of the filter bag, especially for water absorption, deliquescence and wetting dust, which will cause the bagging. At the same time, pay attention to the dust inlet temperature of the dust collector should be higher than the dew point of the gas . Gas chemical properties in a variety of kiln exhaust gas and chemical waste gas, often containing acid, alkali, oxidants, organic solvents and other chemical composition, and often by the temperature, humidity and other factors affect the cross. Therefore, the choice of media should be thoughtful.
F According to the choice of dust properties
Wettability and adhesion of dust Hygroscopic dust when its humidity increases, the cohesion of the particles, the viscous force increases, the dust cake easy to knot. Adhesive strong dust, should be selected by the surface singeing, calendaring, mirror-treated needle felt filter media, for impregnation, coating, coating technology should make full use of. Flammability and chargeability of dust, such as pulverized coal, coke powder, alumina powder and magnesium powder, should choose flame retardant filter and antistatic filter. Dust Flow and Friction Dust flows and rubs strongly, and can wear bags directly, reducing service life. Dust wear and airflow velocity of 2 to 3 power and the dust particle size of the 1.5 power is proportional to, therefore, the air flow velocity and its uniformity must be strictly controlled. In the common dust, aluminum powder, silicon powder, coke powder, carbon powder, sintered ore, etc. are highly abrasive dust, abrasive wear should be used for good filter media.
G, according to the dust cleaning method of choice
