预滤棉对滤芯过滤性能的影响研究

Study on the Influence of Pre-filter Wrap on Filter Filtration Performance

为了探究预滤棉对滤芯过滤性能的影响,利用静电纺复合材料和熔喷复合材料制备微型滤芯并包覆M5预滤棉,进行加载A2粉尘和DEHS油性物质产生的混合尘实验。实验结果表明,静电纺复合材料滤芯包覆预滤棉的容尘量是无预滤棉的2.9倍,熔喷复合材料滤芯包覆预滤棉的容尘量是无预滤棉的3.0倍,实验过程中第一块预滤棉的容尘量最大,分别占滤芯及预滤棉总容尘量的58%和52%。在滤芯上增加预滤棉的方法可以有效延长滤芯的使用寿命,且在实验条件下,静电纺复合材料比熔喷复合材料对油灰混合尘更敏感,阻力上升快。

In order to explore the influence of pre-filter wrap on the filtration performance of the filter element, Micro-filters were prepared by electrospinning composite and melt-blown composite, and M5 pre-filtered wrap was installed to carry out the mixed dust experiment of A2 dust and DEHS oily substances. The experimental results show that the dust holding capacity of the electrospun composite filter with pre-filter wrap is 2.9 times that of the filter without pre-filter wrap. The dust holding capacity of the melt-blown composite filter with pre-filter wrap is 3.0 times that of the filter without pre-filter wrap. During the experiment, the first pre-filter wrap has the largest dust holding capacity, accounting for 58% and 52% of the total dust holding capacity, respectively. The method of install pre-filter wrap to the filter element can effectively extend the service life of the filter element. Under the experimental conditions, the electrospun material is more sensitive to the putty mixed dust than the melt-blown material, and the pressure drop rises rapidly.