Study on influence of inlet structure of cyclone on classification effect
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采用Eulerian单相流体模型,模拟了 4种不同入料管结构的旋流器的物料运动过程.包括传统圆形入料口(R-1型,直径15 mm),方形入料口(R-2、R-3和R-4型,尺寸为7 mm ×7 mm、8 mm ×6 mm和9 mm ×5 mm).同时,选择R-2型进行试验验证.结果表明,在体积进料速率为0.266 kg/s的情况下,与圆形入料管道旋流器相比,方型构型具有更大的E(Eule)值和R(底流溢流比)值.同时CFD模拟结果轴向速度分布证明了更多的流体移到R-2型,采用方形进料管代替圆形进料管E值平均增加12.4％,R值平均增加7.6％,d50(切割粒度直径)平均减小32％,有助于提高分离器的分级效率.
The material movement of four kinds of hydro cyclone with different inlet tube structures was simulated by using Eulerian sin-gle phase fluid model.These include traditional round inlet(type R-1,diameter 15 mm)and square inlet(type R-2,R-3 and R-4,sizes 7 mm × 7 mm,8 mm × 6 mm and 9 mm × 5 mm).At the same time,R-2 type was selected for test verification.The results show that the square configuration has larger E(Eule)and R(bottom flow overflow ratio)values than the circular inlet pipe cyclone at a volumetric inlet rate of 0.266 kg/s.At the same time,the axial velocity distribution of CFD simulation results proved that more fluid moved to R-2 type,and the square inlet pipe instead of the round inlet pipe increased the value of E by 12.4％on average,the value of R by 7.6％on average,and the value of d50(cut particle size diameter)by 32％on average,which helped to improve the classification efficiency of the separator.
NETL
NSTL
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