National Engineering Laboratory for Industrial Wastewater Treatment , East China University of Science and Technology , Shanghai 200237 , People's Republic of China.
National Engineering Research Center for Flue Gas Desulfurization , Sichuan University , Chengdu 610065 , People's Republic of China.
Environ Sci Technol. 2018 Oct 16;52(20):11652-11659. doi: 10.1021/acs.est.8b03921. Epub 2018 Sep 25.
Fine particulate matter (PM) is one of the most serious environmental pollutants worldwide, and efficient separation technologies are crucial to the control of PM emission from industrial sources. We developed a novel method to enhance PM cyclone separation by droplet capture and particle sorting using a vertical reverse rotation cyclone (VRR-C, inlet particle-sorting cyclone). The separation performances of common cyclone (CM-C) without droplets, CM-C with droplets, and VRR-C with droplets were compared in terms of energy consumption, overall separation efficiency, particle grade efficiency, outlet particle concentration, and outlet particle size distribution. The results show that the highest overall separation efficiencies were 51.7%, 89.9%, and 94.5% for CM-C without droplets, CM-C with droplets, and VRR-C with droplets, respectively, when the mean diameter of the inlet particles was 3.2 μm and the inlet particle concentration was 500 mg/m. The PM grade efficiency of VRR-C with droplets was as high as 89.8%, which was 6.2% and 49.9% higher than those of CM-C with droplets and CM-C without droplets, respectively. This novel method was first successfully applied to the deep purification of product gas in the methanol-to-olefin (MTO) industry, for which the separation efficiency of fine catalyst particles was considerably improved.
细颗粒物（PM）是全球最严重的环境污染物之一，高效的分离技术对于控制工业源 PM 排放至关重要。我们开发了一种新的方法，通过使用垂直反向旋转旋风（VRR-C，入口颗粒分级旋风）进行液滴捕集和颗粒分级来增强 PM 旋风分离。在能耗、总分离效率、颗粒分级效率、出口颗粒浓度和出口颗粒尺寸分布方面，比较了无液滴的普通旋风（CM-C）、带液滴的 CM-C 和带液滴的 VRR-C 的分离性能。结果表明，当入口颗粒的平均直径为 3.2μm，入口颗粒浓度为 500mg/m 时，无液滴的 CM-C、带液滴的 CM-C 和带液滴的 VRR-C 的总分离效率最高分别为 51.7%、89.9%和 94.5%。带液滴的 VRR-C 的 PM 分级效率高达 89.8%，分别比带液滴的 CM-C 和无液滴的 CM-C 高 6.2%和 49.9%。该新方法首次成功应用于甲醇制烯烃（MTO）工业中产品气体的深度净化，显著提高了细催化剂颗粒的分离效率。
