摘要：Pore size is a key factor that influences the removal of oil mist droplets by a coalescence filter. However, the influence of the pore size distribution among different filter layers on filtration performance has not been thoroughly explored. In this work, a method for preparing glass fibre filtration media with a specific structure as well as good oleophobic properties and mechanical strength was developed by combining the wet-spinning method and immersive modification. The prepared single-layer media were combined in various three-layer structures with increasing pore size gradient, decreasing pore size gradient and uniform pore size distribution. The trends in the pressure drop and droplet penetration ratio of the resulting combined filters over time were analysed systematically. The results demonstrated that in the combined filter, the first layer material had a significant influence on the filtration process and steady-state performance. Throughout filtration, the pressure drop of the filter with a decreasing pore size gradient had layering characteristics, which was conducive to capturing droplets within different particle size intervals in different stages and thereby relieving the operational pressure on different layers. Hence, the filter with a decreasing pore size gradient had a relatively low steady-state pressure drop and the best comprehensive filtration performance for submicron droplets. However, the filter with an increasing pore size gradient had the highest separation efficiency for submicron droplets and its concentration of steady-state downstream droplets was 19% lower than that in the filter composed of three layers of minimum pore size materials. The proposed mechanism by which the filter with the increasing pore size gradient improved the coalescence filtration efficiency for submicron droplets was based on capillary theory. ? 2022 Elsevier B.V.

ISSN号：1383-5866

卷、期、页：卷306 子辑B

发表日期：2023-02-15

影响因子：0.000000

期刊分区（SCI为中科院分区）：一区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Separation and Purification Technology

通讯作者：巴其鑫,路文超,刘俊

第一作者：陈锋,吴小林,姬忠礼,常程

论文类型：期刊论文

论文概要：陈锋,巴其鑫,路文超,刘俊,吴小林,姬忠礼,常程，Preparation of combined oleophobic fibre filters with pore size gradients and their high-efficiency removal of oil mist droplets，Separation and Purification Technology，2023，卷306 子辑B

论文题目：Preparation of combined oleophobic fibre filters with pore size gradients and their high-efficiency removal of oil mist droplets