摘要
用RNG k-ε模型和DPM模型研究了扩张型排气管偏置对旋风分离器分离性能的影响,同时对-400目的304不锈钢合金粉末进行了分离试验,采用SEM对分离前后的合金粉末进行了表面微观形貌分析。结果表明:对于不同粒径的固体颗粒,不同的排气管偏置量对旋风分离器分离效率具有显著的影响;偏置量为(X-1,Y-1)时有利于粒径较小(≤6μm)的固体颗粒的分离;偏置量为(X+5,Y+5)时有利于粒径较大(>6μm)的固体颗粒的分离;成功的将粒径小于38μm的304不锈钢合金原粉分离成两部分(粒径14~38μm和粒径<14μm),为进一步分离其他合金粉末具有实用参考意义。
The renormalization group（RNG） k-ε model and discrete phase method（DPM） were used for simulation of expansion vortex finder skewing on cyclone separation efficiency. The 304 stainless steel alloy powder（dp≤38μm） were separated, and microstructure of the alloy powder was investigated by scanning electron microscopy（SEM）. The results show that the skewing size of expansion vortex finder has a significant influence on the separation efficiency of the cyclone separator for different diameter of solid particles; when the size of skewing is（X-1, Y-1）, it＇s favor for the fine particles（dp6μm） separation; when the size of skewing is（X＋5, Y＋5）, it＇s favor for the coarse particles（dp≥6μm） separation. When the inlet velocity is 1 m/s, 304 stainless steel alloy powders（dp≤38μm） were successful separated to two section（14~38 μm and 14μm） in cyclone, which expansion vortex finder skewing is（X＋5, Y＋5）. It is significance for further separation of other alloy powder.
出处
《四川有色金属》
2017年第3期62-66,共5页
Sichuan Nonferrous Metals
关键词
旋风分离器
排气管偏置
数值模拟
分离效率
SEM分析
cyclone separator
vortex finder skewing
numerical simulation
separation efficiency
SEM.
