可吸入颗粒物种类对聚丙烯腈纤维束过滤器除尘性能的影响

Effect of respirable particulate matter on dust removal performance of polyacrylonitrile fiber bundle filter

为探究聚丙烯腈纤维束对不同颗粒物除尘效果的影响,在粉尘浓度0.58g·m^-3、风速1.0m·s^-1、纤维填充率为0.67%的条件下,研究了路面扬尘、粉煤灰和铁矿粉三种颗粒物对聚丙烯腈纤维束过滤器除尘效率与压降的影响,并对过滤器的除尘机制进行了研究。结果表明:在静电吸附与机械拦截联合作用下,聚丙烯腈纤维束对三种颗粒物皆有净化作用;但过滤器对不同颗粒物的除尘效率不同,对路面扬尘和粉煤灰的除尘效率为70%~80%,对铁矿粉除尘效率仅为30%~60%。不同颗粒物对过滤器压降影响较小,压降值在25Pa左右,且设备运行过程中压降变化不大。

In order to explore the effect of different particulate matter on the dust removal performance of polyacrylonitrile fiber bundle filter,the effect of road dust,fly ash and iron ore powder on the removal efficiency and pressure drop was investigated under the conditions of the inlet particle concentration of 0.58 g·m-3,face speed of 1.0 m·s-1 and fiber filling rate of 0.67%.In addition,the removal mechanism of the filter was evaluated.The results show that the polyacrylonitrile fiber bundle can purify all three kinds of particulate matters under the combined action of electrostatic adsorption and mechanical interception.But the filter has different dust removal efficiency for different particulate matter.The dust removal efficiency of the road dust and fly ash is 70%~80%,while the dust removal efficiency of iron ore fines is only 30%~60%.Moreover,different particulate matter has little effect on the pressure drop of the filter,which is about 25 Pa,and the pressure drop shows little change during the operation of the equipment.