Precipitator Toi decided to bag the key parts of the dust collection efficiency and operating temperature, the cost of replacing the dust bag, bag filter maintenance costs, so the bag working life related to the operational status and cost of the precipitator, select the filter and the designed structure is particularly important. Select the filter should be based on the temperature, humidity and chemical properties of the gas; granule material, size, weight, shape, whether pecked grinding and dust concentration, filtration rate, cleaning methods, emission concentration, and the baghouse system and other factors considered. Under normal circumstances, the pulse jet baghouse selection of needle felt, sub-room cleaning bag filter or mechanical vibration to play baghouse selection of woven fabrics.