Boiler flue gas boiler flue gas scrubber can be divided into dust bag filter, electrostatic precipitators, desulfurization and dust cyclone categories. Currently in the boiler flue gas treatment, the baghouse dust removal is the best, but also to meet national environmental acceptance criteria. Before the cyclone boiler precipitator are used or high-voltage electrostatic precipitators, due to emissions of reach today's standards, so now a lot of the power plant boiler plant transformation electrostatic precipitators are baghouse. Baghouse advantage: pulse jet bag filter has the widest practical, it can be the most effective way to remove the most harmful respirable dust. Generally, large particles of dust not constitute harm to human body does not belong to dust research object. Baghouse dust efficiency up to 99.9%, the discharge concentration 20ms / m3 or less, is the ESP and wet dust that fall. The size of the bag filter based on the amount of smoke to be, independent of the dust collection efficiency and the specific resistance. On the dangers of large 0.5μm or less dust, high efficiency dust dry electrostatic precipitator to remove only 20%, while passed baghouse dust removal efficiency of more than 95, married for grain dust particles less than 2μm grading baghouse dust removal efficiency is also higher than the ESP. With a bag filter to collect dry ash, dust and resources conducive to improve economic efficiency of pollution control technology. In the past and present, at room temperature baghouse department played a significant role discretion. Today, people recognize from the experience of dry dust, in particular the use of high temperature gas baghouse dust as advantages. In the future, in addition to further expand baghouse dust for general outside his office for a large furnace, kiln dust smoke as the tasks that will be even more important.