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对高固含体系下Intermig桨搅拌槽内的桨叶搅拌性能以及颗粒的混合与悬浮特性进行实验研究.采用光导纤维技术对不同桨径、搅拌转速和桨叶离底距离下搅拌槽内底部以及轴向颗粒密度进行测量,同时对临界悬浮转速和搅拌功率进行测定.实验结果表明:对高固含液-固搅拌体系,所采用的Intermig搅拌桨具有很好的轴向混合特性,该桨适合在较大的桨径和较低的桨叶离底距离下应用,可在促进颗粒悬浮与均匀分布的同时,大大降低功率消耗.通过对实验结果的分析和拟合得出底部均匀度与搅拌槽内弗劳德数有关,Q=0.58Fr~(-0.35),Intermig搅拌桨功率准数在0.2~0.3之间,且与雷诺数关系为NP=2.1Re~(-0.2).
Experiments were carried out on the agitation performance of the blades and the mixing and suspending properties of the particles in the Intermig paddle stirred tank under the high solid content system.Using optical fiber technology, the effects of different impeller diameter, agitation speed and paddle distance on the bottom of agitation tank, Axial particle density was measured and the critical suspension speed and stirring power were measured.The experimental results show that the Intermig impeller used in the high solids liquid-solid mixing system has good axial mixing characteristics, and the paddle is suitable The application of larger diameter and lower blade distance can greatly reduce the power consumption while promoting the suspension and uniform distribution of particles.According to the analysis and fitting of experimental results, The Froude number in the tank is related to Q = 0.58Fr ~ (-0.35). The power of Intermig impeller is between 0.2 ~ 0.3, and its relationship with Reynolds number is NP = 2.1Re ~ (-0.2).