Abstract: The dynamic pressure characteristics at different positions of pulse cleaning system were measured by high frequency dynamic pressure sensor. The effects of cleaning pressure and diameter of nozzles on pulse cleaning performance were examined. Both design proposals for the subject and filtration to verify this research conclusion were proposed. The results show that there is significant difference of pulse cleaning performance with the same diameter nozzles, the difference of pulse jet nozzles performance increases when cleaning pressure increases, the pulse cleaning intensity decreases when the nozzles diameter increases. The static pressure along cleaning direction gradually increases. By decreasing the diameter of nozzles along the pulse jet direction, the pulse cleaning effectiveness can be improved. The ratio of sectional area of nozzle (s) to sectional area of pulse jet pipe (S) is significant for pulse cleaning. In this research, the best ratio s/S is from 45% to 55%.

Key words: pulse cleaning, pressure sensor, ceramic filter, dynamic pressure

摘要： 利用高频动态压力传感器测定脉冲反吹系统中各位置的压力特性，研究了反吹压力和喷嘴孔径对压力特性的影响，提出了解决反吹不均匀的设计方案，采用过滤循环实验进行验证. 结果表明，采用相同孔径的喷嘴时，喷吹管内、喷嘴出口及过滤管内的压力特性存在较大差异，各喷嘴的反吹不均匀性随反吹压力升高而增大，反吹强度随喷嘴孔径增大而减小，喷吹管内的静压沿喷吹方向逐渐增大. 沿喷吹方向将喷嘴孔径递减能改善反吹不均匀的状况，喷嘴截面积与喷吹管截面积之比s/S对脉冲反吹均匀性的影响较大，s/S=48%~55%较佳.

关键词: 脉冲反吹, 压力传感器, 陶瓷过滤管, 动态压力