Boiler precipitator in the design and selection of a number of factors related to the life of the filter bag. Please do not overlook some of the details, after our many years of experience summed up the following factors. Boiler dust bag life factors 1. boiler dust concentration, dust load, emissions to choose the fan and pipe length, calculated filtration velocity, air volume relationship. 1> is as: small fan design selection, duct length, wind speed and air volume also small, will cause the filter to reduce the amount of soot and dust removal equipment, resulting in an incomplete or imperfect flue gas treatment. 2> is as: design selection big fan, duct short, wind speed, dust removal equipment processing filter dust was achieved, but the wind speed of the suction pressure and big bag, it will affect the life of the filter bag. This is the impact of one bag life. 3> To carefully calculated design choice fan, duct length design, to achieve a reasonable wind speed, air flow, this will reduce the suction pressure of the bag, but also can achieve treat flue gas requirements. And increased bag life. The boiler flue gas temperature, flue gas containing acidic, basic, (such as sulfur dioxide, sulfur trioxide and nitrogen oxides) and water vapor are related. 1> Example: bag filter design selected the wrong temperature, intolerance acidic, alkaline intolerance, impatience soluble bag filter. Bag life short, high frequency of replacement. Post-maintenance costs are also high. 2> choose the corresponding flue gas temperature bag filter, such as flue gas temperature is too high, there is no corresponding filter, the choice of the best media and high temperature flue gas to take measures to cool the filter to the corresponding temperature. Not just the media temperature also requires also acid and alkali resistance, water-soluble and so on. In order to achieve the life time of the filter bag. 3. The dust content, the choice of setting the pulse jet cleaning injection time control of a relationship. 1> is determined by observing the amount of boiler dust collecting equipment, see fouling thickness size bag outside, set the pulse jet dust controller interval length of time, the number of injection. Set the injection interval time is short, increasing the number of injection, although the cleaning effect has been. But increases the wear between the bag and the keel, it will also reduce the bag life. 2> according to the boiler equipment bag dust collecting capacity, the appearance of the dust bag. Set pulse jet cleaning interval controller duration, requiring many tests demonstrate the most reasonable set injection interval, adjust the injection interval is reduced to the longest time setting, but also to reach the cleaning effect. This will reduce energy consumption, but also reduce the number of bags and keel wear, increase the service life of the bag.