石 赛， 刘汇洋， 俞建峰， 黄 然， 钱陈豪

（江南大学机械工程学院； 江苏省食品先进制造装备技术重点实验室， 江苏无锡 214122）

DOI:10.13732/j.issn.1008-5548.2021.04.014

收稿日期： 2021-03-02， 修回日期：2021-05-08，在线出版时间：2021-06-02 16:53。

基金项目：国家自然科学基金项目，编号：51905215；江苏省食品先进制造装备技术重点实验室科研项目项目，编号：FMZ202016。

第一作者简介：石赛(1996—)，女，硕士研究生，研究方向为微纳颗粒分离技术。E-mail：shisai960926@126.com。

通信作者简介：俞建峰(1974—)，男，博士，教授，博士生导师，研究方向为食品加工装备。E-mail：robotmcu@126.com。

摘要：为提高传统液固流化床的分级性能，利用斜板沉降技术研制一种带倾斜板的液固流化床分级装置;以二氧化硅粉体为研究对象，采用单因素实验法考察了流化速度、物料质量浓度和进料流速3个操作参数对液固流化床分级性能的影响。结果表明:随着流化速度的增大，溢流级各粒径部分分级效率增大，综合分级效率先增大后减小;随着物料的质量浓度的增大，溢流级细颗粒部分分级效率先增大后减小，综合分级效率先增大后减小;随着进料流速的增大，溢流级细颗粒部分分级效率先增大后趋于稳定，综合分级效率先增大后减小;当斜板倾角为60°、流化速度为0.07 m/s、物料质量浓度为8 g/L、进料流速为0.023 m/s时，综合分级效率可达63.16%。

关键词：液固流化床；斜板沉降技术；二氧化硅粉体；分级性能；操作参数

Abstract：In order to improve the classification performance of traditional liquid-solid fluidized bed,a liquid-solid fluidized bed classification device with inclined plate was developed by using inclined plate settlement technology. The effects of fluidization velocity,mass concentration of material and feed velocity on the classification performance of liquid-solid fluidized bed were investigated by single factor experiment. The results show that with the increase of fluidization velocity,the fractional efficiency of each particle size in the overflow stage increases,while the comprehensive fractional efficiency firstly increases and then decreases. With the increase of the mass concentration of the material,the fractional efficiency of the overflow fine particles increases firstly and then decreases,while the comprehensive fractional efficiency increases first and then decreases. With the increase of feed velocity,the fractional efficiency of overflow fine particles increases firstly and then becomes stable,while the comprehensive fractional efficiency increases first and then decreases. When the inclination of inclined plate is 60°,fluidization velocity is0. 07 m/s,mass concentration of material is 8 g/L and flow rate of feed is 0. 023 m/s,the comprehensive classification efficiency can reach 63. 16%.

Keywords：liquid-solid fluidized bed; inclined plate settlement technology; silica powder; classification performance; operating parameter

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