摘要
热解工艺制备的MgO颗粒形貌各异,粒径分布不均.传统的数值模拟过程假设产物为同粒径的标准球形颗粒,与实验结果存在一定的误差.因此,以射流热解制备MgO过程为研究对象,引入伸缩因子等参数,研究了几种特殊的非规则MgO颗粒在射流热解反应器出口的分布,对比标准球形颗粒的分布结果进行讨论.结果表明:收缩因子α、丰满指数k及放缩径比β共同作用影响着MgO的收率.当α=-0.25,k=1,β=1时,MgO的收率较高,为96.88%;当α=0.25,k=2,β=1.5时,MgO的收率较低,为80.39%.
The MgO particles prepared by pyrolysis process possess different morphologies and uneven size distribution of the particles.There are some errors from the traditional numerical simulations to the experimental results,where the particles assume to be the standard spherical and same-sized particles.Therefore,an extension factor(α),fullness factor(k)and shrinkage ratio(β)are introduced to characterize the distributions of several specific types of irregular MgO particles inside a jet-flow pyrolysis reactor.All three parameters are found to affect the yield of MgO particles greatly.When the parameters ofα,k andβare-0.25,1 and 1,respectively,the yield is maximum with a value of 96.88%,while it becomes a lower one of 80.39%,corresponding toα=0.25,k=2 andβ=1.5.
作者
吕超
牛丽萍
赵秋月
王文博
LYU Chao;NIU Li-ping;ZHAO Qiu-yue;WANG Wen-bo(School of Control Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第11期1579-1583,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51374064,51904069)
中央高校基本科研业务费专项资金资助项目(N172303012)
东北大学秦皇岛分校科研启动资金资助项目(XNY201808)
河北省自然科学基金资助项目(E2019501085)
关键词
反应器
热解
非规则颗粒
数值模拟
收率
reactor
pyrolysis
irregular spherical particle
numerical simulation
yield
