State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology , Shanghai, 200237, P. R. China.
Shanghai Huachang Environmental Protection Co. Ltd., Shanghai, 201611, P. R. China.
Environ Sci Technol. 2017 Feb 7;51(3):1587-1594. doi: 10.1021/acs.est.6b04418. Epub 2017 Jan 26.
Many cities are suffering from severe air pollution from fine particulate matter. Cyclone is an effective separator for particulate pollutant but has low efficiency for those with an aerodynamic diameter of 2.5 μm or less (PM). In this research, four novel inlet particle-sorting cyclones were first developed to enhance the separation of PM. The energy consumption, overall separation efficiency, particle grade efficiency,outlet particle concentration and size distribution were compared with common cyclone (CM-C). It was found that the vertical reverse rotation cyclone (VRR-C), which made the smaller particles enter cyclone from radially outer side and axially lower side at the rectangular inlet, had the best separation performance, especially for PM separation. The mean diameter of inlet particles was 15.7 μm and the particle concentration was 2000 mg/m, the overall separation efficiency of the VRR-C reached 98.3%, which was 6.4% higher than that of CM-C. PM grade efficiency of the VRR-C exceeded 80%, which was 15∼20% higher than that of CM-C. The PM content at the VRR-C outlet was 30.8 mg/m, while that of CM-C was still 118.4 mg/m. The novel inlet particle-sorting cyclone is an effective separation enhancement for PM source control in the process of industrial production and environment protection.
许多城市正遭受细颗粒物造成的严重空气污染。旋风分离器是一种有效的颗粒物污染物分离器，但对于空气动力学直径为 2.5μm 或以下的颗粒物（PM）的分离效率较低。在这项研究中，首次开发了四种新型入口颗粒分级旋风分离器，以提高 PM 的分离效率。与普通旋风分离器（CM-C）相比，比较了其能量消耗、整体分离效率、颗粒分级效率、出口颗粒浓度和粒径分布。研究发现，垂直反向旋转旋风分离器（VRR-C）的分离性能最好，尤其是对于 PM 的分离。在矩形入口处，较小的颗粒从径向外侧和轴向下方进入旋风分离器，其平均粒径为 15.7μm，颗粒浓度为 2000mg/m3，VRR-C 的整体分离效率达到 98.3%，比 CM-C 高 6.4%。VRR-C 的 PM 分级效率超过 80%，比 CM-C 高 15∼20%。VRR-C 出口处的 PM 含量为 30.8mg/m3，而 CM-C 仍为 118.4mg/m3。新型入口颗粒分级旋风分离器是工业生产和环境保护过程中 PM 源头控制的有效强化分离手段。
