梅潇,田源,刘祥伟

• 1:上海海事大学物流工程学院

摘要(Abstract)：

为了获得超微粉碎机最优的粉碎效果并保证出料颗粒细微且均匀，在一定的刀盘转速条件下使用超微粉碎机进行粉碎实验；为了优选喂料频率，分析不同喂料频率对刀盘粉碎效果的影响；对比试样的粒径分布，分析刀盘和分级轮对物料的粉碎与分级效果；采用Fluent软件将超微粉碎机内部流场可视化，分析不同分级轮转速条件下物料在出料口的质量流率分布以及分级区域的流场状态。结果表明：当刀盘转速为1 232 r/min时，喂料频率对颗粒粒径的分布影响较小，优选喂料频率为20 Hz;分级轮转速对粒径>40μm的颗粒的分级效果的影响更大，但对粒径>0.5～40μm的颗粒的分级影响较小；随着分级轮转速的增大，物料出口处的细颗粒含量增大，粒径减小；当刀盘转速为1 232 r/min、分级轮转速为900 r/min时，粉碎腔内部的速度等值线分布最均匀而且流体流动平稳，切向速度与压力分布的对称性最好，气流在轴向方向上整体表现为上升运动，有利于物料稳定地出料；较优分级轮转速为900 r/min。

关键词(KeyWords)： 超微粉碎;气-固两相流;颗粒分级;分级轮转速;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 上海市科委浦江人才计划项目,编号：21PJ1404600

作者(Author): 梅潇,田源,刘祥伟

DOI: 10.13732/j.issn.1008-5548.2023.06.007

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