对撞式流化床气流粉碎机内腔结构及气流场数值模拟  

Study on Internal Structures and Numerical Simulation of Internal Cavity in a Fluidized Bed Opposed Jet Mill

作　　者：刘雪东[1] 何云松[1] 李凤生[2] 卓震[1] 

机构地区：[1]江苏工业学院机械工程系,江苏常州213016 [2]南京理工大学国家特种超细粉体工程技术研究中心,江苏南京210049

出　　处：《江南大学学报（自然科学版）》2004年第6期595-598,641,共5页Joural of Jiangnan University (Natural Science Edition)　

基　　金：中国石油化工股份公司科技基金项目(W01018)资助课题;江苏省高校自然科学研究项目(01KJB530004)资助课题.

摘　　要：通过分析对撞式流化床气流粉碎机的喷嘴结构、分级叶轮型式、加料口位置及底部结构等,阐述了该型气流粉碎机的结构型式及特点.为了克服设计该型粉碎机过程中的盲目性,采用计算流体力学软件fluent,对内径为200mm的对撞式流化床气流粉碎机的内腔气流场进行了有限元分析计算,并根据计算结果绘制内腔气流场的速度和压力分布云图,描绘了粉碎机内腔流场的气流迹线,为对撞式流化床气流粉碎机的优化设计提供了理论依据.The paper presents the internal structures and performance features of the fluidized bed opposed jet mill based on the jet nozzles structure, impeller types, feeding inlet and bottom structure. Numerical simulation in the cavity of a jet mill whose internal diameter is 200 mm is achieved by the CFD software Fluent to overcome design blindly. The contour maps of static pressure, velocity distribution and path lines for flow-field of jet air in the cavity of the mill are presented by the calculated results. The method can help obtain the optimal design for this kind of jet mill.

关 键 词：流化床 气流粉碎 流场 数值模拟 

分 类 号：TD454[矿业工程—矿山机电]