Effect of annular baffles on the pulsed-jet performance of dust filter cartridge regeneration

In this study, a new method to establish an annular baffle at the dust filter cartridge opening is proposed to improve the reverse pulsed-jet airflow of the cartridge regeneration. Numerical modeling was used to investigate the improvement in the pulsed-jet airflow. The effect of the baffle sizes (outer diameter, R = 15-120 mm and inner diameter, r = 0-105 mm) on the pulsed-jet cleaning performance of dust filter cartridge (length of 660 mm and inner diameter of 240 mm) was also studied. An experiment was then conducted to study the effect of the annular baffle on the pulsed-jet pressure and the filter cleaning performance. The results showed that the use of an annular baffle with a suitable size was beneficial to improve the overall pulsed-jet pressure and uniformity. Three optimal sizes ([R, r] = [105, 45], [120, 45], and [120, 60] mm) of the annular baffles were obtained here. In a suitable range of the jet distance, h, the baffle did not hinder the jet airflow from entering the cartridge core and suppressed the accumulated airflow in the cartridge to escape. The annular baffle's improved performance is best observed at a smaller h (< similar to 350 mm). The dust clogging and cleaning test found that, using the annular baffle of [120, 60] mm, the dust cleaning performance was effectively improved, with the fallen dust mass during cleaning increased by 67.6% in average and the comprehensive filtration quality factor improved by 20.4%.