Experimental and modelled efficiencies during the filtration of a liquid aerosol with a fibrous medium
Experimental and modelled efficiencies during the filtration of a liquid aerosol with a fibrous medium
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DOI：
10.1016/j.ces.2009.11.037
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发表时间：
2010-03
影响因子：
4.7
通讯作者：
A. Charvet;Y. Gonthier;E. Gonze;A. Bernis
中科院分区：
文献类型：
--
作者：
A. Charvet;Y. Gonthier;E. Gonze;A. Bernis
本研究的目的是通过纤维过滤器的液体气溶胶的过滤过程中，确定和模型的效率。一系列实验表明，液体颗粒过滤不同于固体颗粒过滤，因为出现排水状态，其特征在于在过滤器堵塞结束时的恒定压降。此外，在过滤器堵塞期间，对于直径接近100纳米（最具穿透力的粒径）的颗粒，数量效率呈现最低水平。结果还表明，在过滤器堵塞期间，对于小于100 nm的颗粒，介质的性能降低，而对于直径> 200 nm的颗粒，效率增加。这两种效应都是由介质中收集的液体量引起的。最后，提出了一个模型来描述过滤器的效率与液体气溶胶堵塞。
The aim of this study was to determine and model efficiency during the filtration of a liquid aerosol through a fibrous filter. A series of experiments demonstrated that liquid particle filtration is different from solid particle filtration in that a drainage state appears, characterized by a constant pressure drop at the end of filter clogging. Moreover, during filter clogging, the number efficiency presents a minimum level for particles close to 100nm in diameter (the most penetrating particle size). The results also reveal that during filter clogging there is a decrease in the medium's performance for particles smaller than 100nm and an increase in efficiency for particles with a diameter >200nm. Both effects are induced by the amount of liquid collected in the medium. Finally, a model is proposed to describe filter efficiency during clogging with a liquid aerosol.