提高旋风除尘器对微细沙尘除尘效率研究

Research on Improving the Dust Removal Efficiency of Cyclone Dust Collector for Fine Sand

以TX-18铁路道床吸污装置中的除尘系统的旋风子作为模型,选用Ansys中CFD模块模拟了旋风除尘器在吸污过程中对粒径在5~200μm范围内的沙尘的除尘效率。通过轴向速度云图、径向速度云图,研究了排气管插入深度对除尘效率的影响。利用粒子追踪对沙尘颗粒在旋风除尘器进行分析,探讨了不同粒径的沙尘的运动轨迹。结果表明,当排气管道插入深度与与吸入口高度之比为0.8时,具有更好的除尘效率,其能够满足对粒径为大于40μm的沙尘在进行气固分离。

Taking the cyclone of the dust removal system in the TX-18 railway track bed sewage suction device as a model,the CFD module of Ansys is selected to simulate the dust removal of the dust in the range of 5~200μm in the cyclone dust collector during the dirt suction process efficient.Through the axial velocity cloud diagram and the radial velocity cloud diagram,the influence of the insertion depth of the exhaust pipe on the dust removal efficiency is studied.Particle tracing is used to analyze the dust particles in the cyclone dust collector,and the movement trajectories of sand dust with different particle sizes are discussed.The results show that when the ratio of the insertion depth of the exhaust pipe to the height of the suction port is 0.8,the dust removal efficiency is better,which can satisfy the gas-solid separation of dust with a particle size of more than 40μm.