盐泥干燥室导流板的流场分析及结构改进  

Flow Field Analysis and Structural Improvement on the Deflector in Salt Sludge Drying Chamber

作　　者：朱桂华[1] 李忠锴 魏钊 洪泽玉 ZHU Gui-hua;LI Zhong-kai;WEI Zhao;HONG Ze-yu(School of Mechanical and Electrical Engineering,Central South University)

机构地区：[1]中南大学机电工程学院

出　　处：《化工机械》2023年第6期845-851,共7页Chemical Engineering & Machinery

基　　金：湖南创新型省份建设专项经费(批准号:2020SK2061)资助的课题。

摘　　要：针对侧进风厢式盐泥干燥室内盐泥层上方热气流速度分布不均匀、盐泥干燥效率低的问题,应用导流板对干燥室内流场进行改善。采用standard k-ε模型和多孔介质模型对干燥室内的流场进行数值模拟,通过实验测量改进前后盐泥的含水率。结果表明:安装导流板后可以提高盐泥上方层热气流的流动速度,且速度分布更均匀;对比于原干燥室,盐泥平均含水率降低了4.48%,不均匀系数降低了6.09%。Aiming at uneven distribution of the hot air velocity above the salt sludge layer in the side-entry salt sludge drying chamber and the low drying efficiency of the salt sludge,a deflector was used to improve flow field in the drying chamber.The standard k-εmodel and the porous media model were used to simulate flow field in the drying chamber;and through experiments,the salt sludge moisture content before and after improving drying chamber was measured.The results show that,installing the deflector can increase flow velocity of the hot air flow in the layer above the salt sludge,and the velocity distribution becomes more uniform;and compared with the original drying chamber,the average moisture content of the salt sludge can be reduced by 4.48%,and the unevenness coefficient decreased by 6.09%.

关 键 词：导流板 盐泥干燥 含水率 不均匀系数 结构改进 

分 类 号：TQ051.892[化学工程]