油性液滴和A2灰混合物对空气过滤材料容尘性能的影响

Impact of Mixture of Oily Droplets and A2 Fine Dust on Dust Loading Performance of Air Filter Medium

为了更接近滤材的使用工况,将DEHS(癸二酸二异辛酯)液滴与A2灰混合后加载到熔喷纤维复合滤纸上,探究两者不同的质量比对滤材容尘量和压差的影响,并利用SEM对试验后滤材的表面状况进行观察。结果表明,当DEHS含量由0增加至20%时,滤材表面的颗粒逐渐由疏松多孔结构过渡为岛状分布结构,滤材的容尘量由83.1g/m^2迅速增加至峰值447.4g/m^2,压差增长速率降低;当DEHS含量为30%时,滤材的容尘量迅速减小至43.4g/m^2,当DEHS含量继续增加至60%时,滤材表面的颗粒由岛状分布过渡为连续分布,滤材容尘量缓慢减小至26.5g/m^2,当DEHS含量继续增加至100%时,滤材容尘量又逐渐增加至62.7g/m^2。

The diisooctyl sebacate（ DEHS） droplets was mixed with A2 fine dust to challenge a melt-blown fibers composite filter medium to mimic the real service condition of the filter. The influence of the mass ratio of the DEHS and A2 fine dust on the dust capacity and the pressure drop of the filter medium were studied. In addition,the surface of the loaded filter medium was observed by the SEM. The results showed that the particles cake was porous when the DEHS content was 0 while it became in the shape of island when in the case of 20%. Meanwhile the dust capacity of the filter medium increased from 83. 1 g/m^2 to 447. 4 g/m^2 quickly. It decreased sharply to 43. 4 g/m^2 when the DEHS was 30%. When the DEHS was 60% the particles distributed continuously and the dust capacity of the filter medium decreased slowly to 26. 5 g/m^2. The dust capacity increased to 62. 74 g/m^2 when the DEHS contents increased to 100%.