The reasons of causing dust filter bag ineffective

(1) Newly installed the clean pores are big, at the beginning of dust by using a higher rate, the state has not yet reached the optimum filter large dust emissions. With the filter, dust accumulation on the outer surface of the filter bag dust layer is formed so that the outer surface of the pores smaller bag, dust removal efficiency. So the determination of pulse jet bag filter dust removal efficiency of repair after a month of continuous use more accurate. (2) Check the bag filter maintenance is properly installed. Conventional pulse jet bag filter, bag mouth stitched to rely on elastic expansion ring in the bag entrapment flower plate hole through the flower board dust and gas in the tank and the tank chamber net gas chamber strict distinction. If the bag mouth of the elastic expansion ring with flower board failed to completely seal the hole, there has been a gap, it will lead to the dust stream directly into the net gas chamber, exhaust take the ash outlet. You can individually check the installation of dust bag mouth and found the gap to compress the seal. During installation, pulse jet bag filter, the quality of the installation of the filter bag is one of the key supervision and inspection. Bag of ironworks installed improved optimization: each flower plate above the hole a welding rings, rings with flowers and a height of 30mm plate hole concentric to the bag mouth sewn single layer of flexible expansion circles close to the inner wall of the ferrule is installed, not only to ensure a smooth installation height of the bag, seal the bag and makes installation and removal more simple. (3) Dust filter bag breakage will result in direct airflow efflux, exhaust outlet filter after maintenance to take ash. For large off-line cleaning pulse jet bag filter, you can use the following method to determine the location of broken bags: one at the chamber cleaning performed by manual operation mode, each time you close a chamber of the valve, observe the exhaust outlet when broken bags have compartments to stop filtering, the exhaust outlet will no longer take the ash, which can be determined pursuant to the chamber appears broken bags. If only the individual damaged bag, sealed with a metal cover plate bore the flowers, you can ensure that the concentration of dust emissions compliance. When the need to replace the filter bag, dust bag is recommended that all the same the same time to replace the filter, to ensure that each bag has the same resistance. If you can only replace a few bags, the need of a new bag bag closed, dust ashes buried a few days, adding new bag of resistance, the resistance of the new bag with old bag close. (4) For the inlet channel and outlet channel in just a separator to separate the dust shall check whether the intermediate plate welded tight. If the intermediate separator, high levels of dust weld gap, which will be fleeing into the wind out of the wind channel, resulting in exhaust outlet to take ash. Ensure the welding quality intermediate separator, the inlet air passage and the air passage completely separated, it is another focus of fabrication and installation of ESP among QA. Sixth, paste bags phenomenon occurs, the running resistance of the pulse bag filter large running resistance is an important performance indicator precipitator maintenance. A high-performance, well-functioning pulse bag filter, only high dust removal efficiency, and running resistance should be maintained at 1500Pa or less. If the pulse bag filter cleaning can not be adhered to the bag will effectively remove dust, dust bag in the outer surface of the gradual accumulation of clogging paste bag, not only the bag easily damaged, but also the running resistance increased precipitator , dust blower operation load increase, resulting in increased operating costs. Liu steel with precipitator performance testing found that some of the running resistance of the pulse bag filter than 1500Pa, running resistance even up some dust 3000Pa, poorly run state