香烟烟雾下高压微静电强电介质过滤性能

Filtration Performance of Intense Field Dielectric Filter Media under Tobacco Smoke

以香烟烟雾为尘源,测试了颗粒污染物不同粒径分布时高分子聚合物强场电介质过滤材料的过滤效率、压力降、臭氧(O 3)产生量,以及组合过滤器的过滤效率随迎面风速的变化。结果表明:过滤效率随迎面风速的增大呈先增大后减小的趋势,峰值在风速1.0 m/s左右,此时粒径大于0.5 μm颗粒物的过滤效率超过65%;迎面风速越大,压力降也越大;O 3 最大发生量为0.03 mg/m ^3 ,小于GB 3095—2012限值。在风速约为0.85 m/s时,对于粒径≥1.0 μm的颗粒物,组合过滤器的过滤效率最大,为99.31%。参照欧盟关于过滤器分级的标准,高分子聚合物强场电介质材料可替代部分传统中效过滤器。

Taking tobacco smoke as the dust source, this paper tested the filtration efficiency, pressure drop and ozone(O 3) generation of the single intense field dielectric (IFD) filter, as well as the filtration efficiency of the combined filters against with face velocity under different particle size distribution. The results show that, with the increase of face velocity, the filtration efficiency increases first and then decreases. The filtration efficiency of particles with size greater than 0.5 μm is more than 65% when its peak value appears at about 1.0 m/s. Besides, larger face velocity might result in greater pressure loss. The maximum generation of O 3 is 0.03 mg/m^ 3 , which meets to the items from the standard GB 3095-2012. When the face velocity is 0.85 m/s, the filtration efficiency of the combined filters reaches its maximum value of 99.31%, for the particles with size greater than 1.0 μm. Reference to EU(European Union) criteria for filter grading, the IFD materials can be used to replace some of the medium class of filters.