The bag type dust collector is widely used in building materrial, cement, metallurgy, machinery, chemical and refractory material industries; Especially used for dust collector system(or dust filter system) in the cement crush, drying, coal millingk, separating, packaging, tank top, clinker cooler and so on; Also suitable for coal milling and dust collect, it is a kind of comartment structure assembling type bag filter, the chamber top pulse valve carry out sepatate chamber wind stop plenum pulse to clean the dust(that is off line dust separation)in sequences for each chamber filter bag.