纤维滤料在容尘阶段的过滤性能实验研究

Theoretical and experimental study of the dynamic filtration for fibrous media

摘要:

通过容尘实验探讨分析了气溶胶的特性参数对纤维滤料的非稳态过滤性能参数的影响、滤料在容尘阶段的压降△P和各粒径微区间的分级效率随单位面积累计容尘量的变化特性，以及滤料在粉尘或气溶胶微粒沉积的各个压降阶段的最易透过粒径(MPPS)等。另外，分析得到纤维滤料的积尘填充率α的计算式，利用实验数据检验计算滤料在容尘阶段的压降经验公式的适用性，并借助于Matlab的回归分析拟合出合适的压降修正式。

Abstract:

The experiments were carried out to study the filtration performance of fibrous media during dust loading period. The influence of the aerosol characteristics on the dynamic parameters of fibrous media was analyzed. The relationships of pressure drop, filtration efficiency with the accumulative loading dust were described and the most penetrating particle size (MPPS) during the particle-loaded period was calculated. In addition, the calculating method for the dusty packing density α was developed and the empirical formula for pressure drop during dust loading period was identified based on the results of experiments. An improved method for calculating pressure drop was established by the regression analysis of Matlab.