Abstract: In the Waigaoqiao Power Plant, using the overhaul opportunity, the original electrostatic precipitator of boiler No.1 was transformed into low pressure pulsetype long bag filter. The performance and structure of the bag filter were introduced. The automatic detection and protection of the bag filter, the filtering bag, the soot cleaning and the status of the bag filter before and after putting into operation were described. After the bag filter was put into operation, it operates stably, each index of its operation was well, and the requirement of flue gas emission was met.

Key words: bag filter, low pressure pulse-type long bag filter, blowing device, smoke dust emission