上部开孔锥形散射器对滤筒脉冲清灰效果的影响

通过搭建脉冲喷吹实验台，实验研究喷嘴以及喷嘴下安装上部开孔锥形散射器的两种脉冲喷吹方式下沿滤筒长度方向上的侧壁压力分布特性。结果表明：只有喷嘴时，沿滤筒轴向方向至上向下的侧壁压力逐渐增大，下部压力大于上、中部；而在安装上部开孔锥形散射器的情况下，滤筒侧壁压力分布为中部压力略小于上部与下部，但上、中、下部压力相对均匀。在满足清灰要求条件下，安装上部开孔锥形散射器明显提高滤筒脉冲清灰均匀性，减小脉冲气流对底部的冲击，改善滤筒下部滤料破损的问题。

Effect of open top tapered diffusers on dust cleaning in cartridge filters

A new type of tapered gas diffusers with an open hole on the top was applied in the cartridge filters for dust cleaning. To evaluate the effect of the new diffusers, the pressure distribution in the cartridge filters with the diffusers ware experimentally tested and compared with the diffusers free cartridge filters. The experiment results show that, the lateral pressure increases from top to bottom for the diffusers free cartridge filers, but in the case of cartridge filers with the diffusers, the lateral pressure reach the lowest value at the middle of the filers and the pressures are more uniformly distributed. According to these results, a conclusion can be made that the new diffusers can obviously increase the pressure uniformity in the filters and maintain the adequate pressure for dust cleaning, the filters are more unlikely damaged by the excessively high pressure on the bottom of the filters.