文献类型：期刊文献

英文题名：Ultra-clean separation of micro-particles in lubricant oil based on short-flow control of mini-hydrocyclone

作者：Zhang, Tong[1,2];Li, Jianping[1,2];Wei, Aosong[1,2];Huang, Junjun[3];Li, Shihao[1];Huan, Jun[3];Wang, Faquan[3];Wang, Hualin[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Carbon Neutral Future Technol, Shanghai, Peoples R China;[3]AECC Aero Engine Control Syst Inst, Wuxi, Peoples R China

年份：2023

卷号：304

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20224312994747);WOS:【SCI-EXPANDED(收录号:WOS:000883746800001)】；

基金：Acknowledgements This research was supported by the National Natural Science Foun-dation of China under Grant No. 52000074.

语种：英文

外文关键词：Ultra-clean hydrocyclone; Micro-particle separation; Short-flow control; Overflow microchannel; 3D printing

摘要：Continuous online ultra-clean separation of micro-particle contaminants is vital for lubricant oil. Although hydrocyclone is widely used to separate fine particles, it often suffers from short-flow, which makes ultra-clean separation of trace micro-particle contaminants remain challenging. Here, mini-hydrocylones with overflow microchannel based on the active control of short-flow were proposed for ultra-clean separation of micro-particle contaminants in lubricating oil. phi 18 mm mini-hydrocyclones with different overflow microchannel widths (1.5,1.25, 1, 0.75 mm) were manufactured by 3D printing technology for online micro-particle number sepa-ration experiments under low flow rates. The CFD simulation results show that the overflow microchannels reduce the short-flow by up to 72.4%. When the overflow microchannel width to vortex finder diameter ratio is 0.21, the maximum number separation efficiency and mass separation efficiency can reach 99.98% for micro -particles larger than 9.8 mu m. The concentration of particle larger than 9.8 mu m at the outlet was 0.003 mg/L, which is 1/22 of that at the conventional hydrocyclone outlet; the number of particle was 1/ml, which is 1/30 of that at the conventional hydrocyclone outlet. The cleanliness of the purified oil reached the international standard (ISO 4406) of 17/13/7 grade, and it also showed excellent technical-economic performance.