多层管排入口结构对旋风分离器性能影响分析

Analysis of the Influence of the Inlet Structure of a Multi-layer Tube Bank on the Performance of a Cyclone Separator

为改善旋风分离器的性能,利用ANSYS软件对传统型分离器与新型分离器（在分离器入口装配多层管排结构）进行了对比模拟。结果显示：多层管排结构对分离器入口部分气体质量流量、颗粒相分布、分离器压降、分级效率（50%分割粒径）均有影响,当入口速度为10 m/s时从入口内侧通过的颗粒数相比于传统分离器减小了8.4%,而大部分颗粒被气体携带从入口的中部、外部进入分离器,这部分颗粒进入分离器后很容易被捕捉;虽然压力损失相比于传统型分离器升高5%,但50%切割粒径从2.6μm减小到2.1μm,大大改善了分离器对细小颗粒的捕捉能力。

To improve the performance of a cyclone separator,the software Ansys was utilized to conduct a contrast and simulation of a conventional separator and a novel separator （provided with a multi-layer tube bank structure at the inlet of the separator）. It has been found that the multi-layer tube bank struc- ture will exercise its influence on the gas mass flow rate, particulate phase distribution, pressure drop of the separator and gradation efficiency （particle diameter when the separation efficiency is 50% ）. When the speed at the inlet is 10 m/s,the number of the particles passing through the inner side of the inlet will decrease by 8.4% when compared with that of the conventional separator while a majority of the particles entrained by gases will enter into the separator from the middle part and external part of the inlet. It will be very easy for this part of particles to be captured after they have entered into the separator. Although the pressure loss will increase by 5 % when compared with that of the conventional separator, yet the parti- cle diameter when the separation efficiency is 50% will decrease from 2.6μm to 2.1μm, cing the ability of the separator to capture small or tiny particles. greatly enhancing the ability of the separator to capture small or tiny particles.