搅拌槽内三相流场混合时间的测定及模拟研究

发布时间：2018-03-01 05:01

本文关键词： 搅拌槽混合时时间流场计算算流体力学　出处：《化学反应工程与工艺》2017年01期 　论文类型：期刊论文

【摘要】：混合时时间是评定搅拌设设备混合效率的重重要指标,为了了检测带有挡板和和导流筒的搅拌槽槽内液-固-固三相相流场的混合时时间,以甘油溶液液为液相,砂子和和赤泥为固相建立立了流场体系,采采用电导法测量体体系的混合时间。并对流场进行行了计算流体动力力学(CFD)模拟研研究,CFD模型采用基于欧拉多多相流模型和RNNGκ-ε湍流模型。流场混合时间间模拟结果与实验验结果的偏差较小小,说明该CFDD数学模型能很很好地预测流场的的混合时间。体系系的混合时间随随搅拌转速的增大大而减小,当流场场的轴向混合占主主导地位时,增设设导流筒可减小小流场的混合时间间。导流筒对于粒粒径和密度较小的的固体影响较大。。
[Abstract]:The mixing time is an important index to evaluate the mixing efficiency of mixing equipment. In order to detect the mixing time of liquid-solid-solid three-phase flow field in a mixing tank with baffles and flow guides, glycerol solution is used as liquid phase. Sand and red mud have established flow field system for solid phase. The mixing time of bulk system was measured by conductance method, and the flow field was simulated by computational fluid dynamics (CFD). The CFD model was based on Eulerian multi-phase flow model and RNNG 魏-蔚 turbulence model. The mixing time of the flow field was simulated. The deviation between the results and the experimental results is relatively small. It shows that the CFDD mathematical model can predict the mixing time of the flow field very well, the mixing time of the system decreases with the increase of the stirring speed, and when the axial mixing of the flow field dominates, the mixing time of the system system decreases with the increase of the stirring speed. The mixing time of the small flow field can be reduced by adding the tube, which has a great influence on the solid with small particle size and density.
【作者单位】：天津理工大学化学化工学院;
【基金】：天津理工大学市市级大学生创新创业训练计划资助项项目(2015100600057)
【分类号】：TQ051.72

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