Factors causing excessive bag filter dust emissions : 1, The initial layer of the surface of the bag filter bag is not enough During the dust collector working, if the operating pressure excessive emissions and dust than low design is likely to be less than the initial surface layer of the powder bag, the reason is willing to be too fast bag filter, filter bag cleaning cycle is too short, blowing compressed air pressure is too high dust load is reduced and so on. Dust collector in operation, the filtration rate is too high, the dust discharge rate will increase, excessive filtration gas velocity will make an initial layer of crushed powder, as well as the impact of the dust bag and cause excessive wear. If the cleaning bag too easily lead times loose fabric bag, which would make the dust collector emissions exceeded. 2, Bag breakage In the dust collector bag if worn, burn and corrosion will appear excessive dust emissions from the dust collector. The main reason for the dust collector bag to be burned because of the exhaust gas temperature is too high, if the dust collector exhaust gas temperature exceeds a long-term deal with the working conditions of the bag, the bag is easy to cure shrinkage, or melting of holes in especially important when selecting the replacement bag. The cause corrosion bag is water condensation in the gas stream can also cause clogging of the bag, when the initial layer of dust bag surface due to moisture, dust and dried cause condensation, compacted, causing the bag to formula elastic, in this condition if the pulse cleaning bag, the bag will accelerate the damage.