Improved sack dust cleaner back-blowing ash-removing device

The utility model improves a cloth bag dust remover, especially a cloth bag back-blowing ash cleaning device. The cloth bag back-blowing ash cleaning device is characterized in that a back-blowing spraying and blowing tube is designed to be a structure which can moves up and down, and a bag mask is provided under a back-blowing nozzle, as a result, the utility model can be in an off-line working state during the cloth bag back-blowing ash cleaning course, and the back-blowing high pressure air current can't leak and is all used to clean the ash. Because of the opposite-rushing interference of the non filter air current, the ash cleaning atmospheric pressure can be used cent per cent, and the back-blowing air current can keep enough pressure to blow the ash to the bottom of a filter bag and make the filter strongly vibrate, and the ash cleaning strength and efficiency are increased. The residence time after the back-blowing course can ensure that enough time is left for the dust to fall down to an ash bucket, and secondary re-sorption isn't needed, and the filter bag can thoroughly clean the ash. Because the filter bag can thoroughly clean the ash, the ash cleaning frequency is lowered, and the running resistance of the device is lowered 150-200Pa. In addition, because the ash cleaning atmospheric pressure basically doesn't lose and the length of the filter bag can be enlarged from original 1-2m to 4-5m, the dust cleaning efficiency of the cloth bag back-blowing ash cleaning device can be obviously improved.