摘要：Oil mist coalescence and filtering are extensively used in the fields of natural gas pur-ification and chemical production. However, it remains technically challenging to capture high-concentration, small-sized, oil mist droplets under complex industrial field condi-tions. To solve this problem, three novel high-efficiency coalescence filter cartridges are proposed, which have improved filter material arrangements. The filtering performance of the cartridges was evaluated in the laboratory and at a natural gas pipeline pressure station under different working conditions to understand the mechanism by which high -concentration small-sized droplets are captured. According to the laboratory results, the filtration efficiency for droplets > 0.2 pm can reach 99.99% if the first layer in the cartridge has a small pore size (1.5 pm). The use of a filtering material with a large pore size can reduce the pressure drop. An arrangement of layers with increasing pore sizes can sig-nificantly improve the quality factor of the cartridges and decrease secondary entrain-ment. In the field test, the size distributions of the oil mist under compressor "hot standby" and operating conditions were gained for the first time. The median size of oil mist droplets was 1.2 pm during hot standby and 0.5 pm during operation. Under both compressor modes, the downstream oil mist concentrations of the proposed cartridges were > 95% lower than that of an existing commercial cartridge once filtering reached a steady state. In a long-cycle test under field conditions, the proposed cartridges showed more stable filtering performance than the existing product, with the filtration efficiency being about 40% higher after 15 days. Moreover, the oil mist coalescence mechanism was determined by microscopic characterization of liquid channels.(c) 2022 Institution of Chemical Engineers. Published by Elsevier Ltd. All rights reserved.

关键字：Oil mist; Coalescing filter; Pore size; Filtration efficiency; Droplet

ISSN号：0263-8762

卷、期、页：卷: 187：306-318

发表日期：2022-11-01

影响因子：3.739000

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,SCIE（科学引文索引网络版）

发表期刊名称：CHEMICAL ENGINEERING RESEARCH & DESIGN

通讯作者：于文瀚,林光耀,丁昊鹏,皮黎明

第一作者：陈锋,姬忠礼,吴小林

论文类型：期刊论文

论文概要：陈锋,于文瀚,姬忠礼,林光耀,丁昊鹏,皮黎明,吴小林，Development and coalescence mechanism of an improved filter cartridge for oil mist separators，CHEMICAL ENGINEERING RESEARCH & DESIGN，2022，卷: 187：306-318

论文题目：Development and coalescence mechanism of an improved filter cartridge for oil mist separators