摘要
为提高错流床传质性能,从液体初始分散的角度出发,设计了四种不同结构的中心管式液体分布器,喷液孔数量分别为4,6,8,10.以NaOH-CO_2为实验体系,测定了不同超重力因子、液量和气量下的有效传质比表面积a_e和液相体积传质系数k_la_e.结果表明:随各操作参数的增大,a_e和k_la_e先增大后减小.超重力因子、液量增大,喷液孔数目为6时传质最好;不同气量下,传质性能在喷液孔数目为8时最佳,但下降趋势明显,6孔的传质稳定.本实验中液体分布器最合适喷液孔数目为6.经数据回归得出a_e和k_la_e的关联式,平均误差均小于15%.
In order to improve the mass transfer performance of the cross-flow bed,from the perspective of initial dispersion of the liquid,four types of liquid distributors with different structures,the liquid spray hole being four six eight and ten,were designed to study the influence of the liquid initial dispersion on mass transfer performance of cross-flow rotating packed bed(RPB)characterized by effective interfacial area aeand the volumetric mass transfer coefficient klaewith NaOH-CO2 as experiment system.High gravity factor,gas flow rate and liquid flow rate were the main operation variables.The experiment results showed that with the increase of the above operating parameters,aeand klaeappeared to increase first and then decrease.In addition,the mass transfer performance showed better when the number of liquid spray hole(LSH)is 6 with the high gravity factor and liquid flow rate increasing.While under different gas flow rate,the RPB presented optimal performance as the LSH is 8,which appears obvious downtrend along with the secular growth of the gas flow rate however.Meanwhile the six-hole mass transfer performance is more stable,which would be the most suitable liquid distributor.Correlations associated with aeand klaewere obtained by regression of experimental data,and the mean deviation between calculated and experimental values is less than 15%.
作者
郭林雅
祁贵生
刘有智
邱锦堂
苏法双
GUO Lin-ya;QI Gui-sheng;LIU You-zhi;QIU Jin-tang;SU Fa-shuang(Shanxi Province Key Laboratory of Higee-oriented Chemical Engineering,Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology,North University of China,Taiyuan 030051,China)
出处
《中北大学学报（自然科学版）》
CAS
2019年第2期143-148,154,共7页
Journal of North University of China(Natural Science Edition)
关键词
液体初始分散
错流旋转填料床
传质性能
液体分布器
超重力技术
initial liquid dispersion
cross-flow rotating packed bed
mass transfer
liquid distributors
high gravity technology
