化工学报Issue(4)：1344-1352,9.DOI:10.11949/j.issn.0438-1157.20141731
气液过滤过程中液滴二次夹带现象分析
Analysis of re-entrainment in process of gas-liquid filtration
摘要
Abstract
In long-distance transmission of natural gas, safe operation of compressor units is seriously affected by droplets entrained in natural gas. The characteristics of re-entrainment in gas-liquid filtration process of filter cartridges were investigated using liquid aerosol of di-ethyl-hexyl-sebacate (DEHS). The effects of filter material wettability and filtration velocity on re-entrainment were also evaluated experimentally. Re-entrainment could be observed in the process of filtration as filter cartridges only composed of coalescing layers. More droplets were entrained into the downstream due to re-entrainment and some large particles could be detected at the downstream. Cumulative efficiency decreased at the large particle size at steady state. Re-entrainment was affected by filter material wettability. Compared with non-wettable filter material, re-entrainment was more obvious on the surface of wettable filter material. To improve filtration efficiency, non-wettable filter material were more suitable for producing industrial filter cartridges at the same filtration velocity. As filtration speed increased from 0.1 m·s−1 to 0.3 m·s−1, higher filtration velocity led to less re-entrainment, and filtration performance of wettable filter cartridges were improved more significantly than that of non-wettable filter cartridges. Re-entrainment could be eliminated by adding drainage layer to filter cartridges.关键词
二次夹带/气溶胶/过滤/润湿性/过滤速度/天然气Key words
re-entrainment/aerosol/filtration/wettability/filtration velocity/natural gas分类
能源科技引用本文复制引用
常程,姬忠礼,黄金斌,詹爽,李兰洁..气液过滤过程中液滴二次夹带现象分析[J].化工学报,2015,(4):1344-1352,9.基金项目
国家自然科学基金项目（51376196）；国家科技重大专项（2011ZX05039-001-003）。@@@@supported by the National Natural Science Foundation of China (51376196) and the National Science and Technology Major Project (2011ZX05039-001-003) （51376196）
