First, the filter speed Dust filter filter wind speed v refers to the average speed of the flue gas through the bag surface, v = Qt / 60F. Among them, Qt is the flue gas flow through the filter bag, m3 / h; F is the total area of the filter bag, m2. The choice of filtration speed to consider the economy, filter bag life and filtration efficiency and other factors. When the same dust quality is accumulated on the surface of the bag, the accumulated dust collection rate decreases significantly with the increase of the filtration rate. In addition, the choice of filtration speed and cleaning methods, cleaning system, dust characteristics, inlet dust concentration and other factors are closely related. In general, for the low-pressure pulse jet cleaning dust filter speed ≤ 1.0m / min, additional dust pretreatment device after the filtration rate ≤ 1.1m / min; backflush cleaning method filtration speed ≤ 0.8m / min; dust Particles smaller, or the entrance of dust concentrat...