涡轮式气流分级机分级效率数学模型研究

Research on Mathematical Model for Classifying Efficiency of Turbo Ultrafine Classifier

为提高涡轮式分级机的分级精度和分级效率，研究了不均匀气流速度场和团聚对它们的影响，分别建立了两种影响的数学模型．研究表明，分级机结构是影响分级精度的决定性因素，而团聚则严重影响较细颗粒的分级效率，导致所谓的“鱼钩效应”．文中理论可用于指导分级机的设计和粉体的制备．

To improve the classifying efficiency,this paper studies the influence of agglomeration and the non-uniformity of classifying air velocity field,builds a mathematical model for them.It indicates that classifying efficiency depends mainly on classifier structure,while agglomeration produces a great impact on classification of fine powders,and leads to fish-hook effect.