Department of Architectural and Civil Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, China.
Department of Architectural and Civil Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, China.
J Hazard Mater. 2016 Jul 5;311:100-14. doi: 10.1016/j.jhazmat.2016.02.072. Epub 2016 Mar 4.
Enhancement of fine particle (PM2.5) separation is important for cyclone separators to reduce any extra purification process required at the outlet. Therefore, the present experimental research was performed to explore the performance of cyclone separators modified with down-comer tubes at solid loading rates from 0 to 8.0 g/m(3) with a 10 m/s inlet velocity. The study proved the effectiveness of down-comer tubes in reducing the particle re-entrainment and increasing the finer separation with acceptable pressure drops, which was pronounced at low solid loading conditions. The experimental results were compared with theories of Smolik and Muschelknautz. Theories were acceptable for certain ranges, and theory breakdown was mainly due to the neglect of particle agglomeration, re-entrainment and the reduction of swirling energy, as well as the increase of wall friction due to presence of particles.
提高细微颗粒（PM2.5）的分离效率对于旋风分离器非常重要，这可以减少出口处所需的额外净化过程。因此，本实验研究在进口速度为 10m/s、固体负载率为 0 到 8.0g/m3 的条件下，探索了带有降液管的旋风分离器的性能。研究证明了降液管在减少颗粒再夹带和提高更细微颗粒分离效率方面的有效性，在低固体负载条件下效果更为显著。实验结果与 Smolik 和 Muschelknautz 的理论进行了比较。在一定范围内，理论是可以接受的，理论失效主要是由于忽略了颗粒团聚、再夹带以及旋流能量的减少，以及由于存在颗粒而导致的壁面摩擦增加。
