文献类型：期刊文献

英文题名：Inlet particle-sorting cyclones configured along a spiral channel for the enhancement of PM2.5 separation

作者：Chang, Yu-Long[1];Jiang, Xia[2];Li, Jian-Ping[1];Fu, Peng-Bo[1];Yuan, Wei[1];Xin, Ruo-Kai[3];Huang, Yuan[1];Wang, Hua-Lin[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, Shanghai 200237, Peoples R China;[2]Sichuan Univ, Natl Engn Res Ctr Flue Gas Desulfurizat, Chengdu 610065, Peoples R China;[3]CNPC East China Design Inst Co Ltd, Qingdao 266071, Peoples R China

年份：2021

卷号：257

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20204409424085);WOS:【SCI-EXPANDED(收录号:WOS:000595257300002)】；

基金：This research was supported by National Key Research and Development Program of China (2019YFC1906700).

语种：英文

外文关键词：PM2.5 separation; Mini-cyclone; Flow uniformity; Spiral channel; Particle-sorting; Dean vortex

摘要：In order to control fine particulate matter (PM2.5) emissions from industrial sources, efficient separation technologies are absolutely crucial, in this work, a novel method was developed for enhancing PM2.5 separation by regulating particle size distribution of the cyclone's inlet using a spiral distributor. A general discrete model was further created for evaluating flow and pressure drop uniformity in parallel mini-cyclones configured along a spiral channel to obtain high separation efficiency and large handling capacity simultaneously. The results showed that the spiral distributor provided a "particle-sorting" effect, which made the small and large particles enter cyclone radially from the outer side and to the inner side at the rectangular inlet, respectively. The large particles on the inside of the cyclones could form a radially mobile granular membrane that could further drive the relatively small particles to be separated. The mean diameter of the inlet particles was 8.237 mu m, the overall separation efficiency with the spiral distributor reached 90.5%, which was 13.4 % higher than the initial cyclone. The maldistribution of the flow and pressure drop decreased significantly when the flow rate and cyclone number increased, and the maximum maldistribution of the flow was less than 10%. It is the first time for this novel method successfully applied to the deep purification of tail gas in the decoking process of an ethylene cracking furnace, in which the separation efficiency of coke particles was considerably improved.