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2. The nature of the dust-containing gas according to the characteristics of the dust-containing gas is mainly temperature, humidity (dew point temperature), chemical composition and gas amount; the temperature determines the structure of the dust-removing equipment and the selection of the filter material, humidity and dew point temperature. It is also related to the filter material; for the flue gas with high humidity or high dew point, the glass fiber filter material treated with the water-repellent treatment agent should be selected; the chemical composition should consider selecting the appropriate filter material without chemical corrosion. The amount of gas is the main factor determining the size of the precipitator. For the anti-air bag filter, the glass fiber expanded yarn filter material is used, and the filtration speed is not more than 0.6m/min.
3, according to the nature of the dust to choose the nature of the dust is mainly concentration, particle size, viscosity and corrosive, etc., is also the main factor affecting the filter material selection. If the dust concentration is large, the lower filtration wind speed should be taken. The negative pressure design and the ability of storage and ash discharge should be considered. The dust concentration is low, and the higher filtration wind speed should be selected appropriately. When the dust concentration is very low, consider the positive pressure design to reduce equipment cost. For dust with a coarser grain size, the intake method should be given priority. For dust with high viscosity, filter materials with good surface finish should be used. Corrosive dust should minimize the filtration speed and pay attention to the uniformity of air distribution to extend the service life of the filter bag.
4, according to the filter material treatment agent formula to choose a variety of different formulations of glass fiber filter material, the use conditions have different requirements.
FCA formula series: long-term use temperature should be below 180 °C; the filter material treated by this formula has good hydrophobicity, suitable for industrial flue gas purification with high moisture content, such as dust removal of various material dryers.
Psi formula series: long-term use temperature up to 280 ° C, suitable for high temperature flue gas dedusting such as carbon black, cement shaft kiln, coal-fired boiler.
Fs2 formula series: working temperature is not more than 280 °C, suitable for flue gas dust treatment of blast furnace, converter, electric furnace and other dust points in the smelting industry.
FQ formula series: working temperature below 260 °C; has certain hydrophobicity and corrosion resistance, such as cement rotary kiln, carbon black and other dust treatment.
RH formula series: It has good acid resistance and high temperature resistance of 280 °C. It is suitable for the treatment of dusty flue gas with high acid content and high fluctuation of temperature and humidity.
Teach you the principle of selection of glass fiber filter materials from different angles
1. According to the production process, the dust collector is selected as the dust removal equipment, but it is also used for the production process. Different production processes have different properties of gas and dust; in the selection of filter materials, especially in the selection of glass fiber filter materials. It should be selected in combination with its production process; if the dust in the flue gas is high in dust, the diameter of the dust particles is large, and the moisture content is low, the dust particles are not easy to stick, and the filter material with a large air permeability should be selected. - Satin or twill filter. The dust content in the flue gas is not very high, the dust particles are fine, and at the same time it is easy to bond. The weaving filter material with less air permeability is used.