同向环流萃取装置的存留分数和液泛研究  

Research on hold-up and flooding of a parallel-flow extraction column

作　　者：王小颖 王成习[1] 杨秋月 WANG Xiao-ying;WANG Cheng-xi;YANG Qiu-yue(College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学化学工程与生物工程学院

出　　处：《高校化学工程学报》2020年第1期70-75,共6页Journal of Chemical Engineering of Chinese Universities

摘　　要：在直径0.1m,孔径3mm的一种同向环流萃取装置中,针对煤油-水和30%磷酸三丁酯(TBP)/煤油-水两种体系,采用体积置换法和观察法分别对分散相存留分数和液泛速度进行了研究。实验结果表明了分散相存留分数随两相表观速度的增大而增大,且分散相速度的影响大于连续相速度。得出了在这两种体系下,连续相的流量范围分别为0~29和0~34 L·h^-1,分散相的流量范围分别为10~166和16~125 L·h^-1。同时,采用无因次数群法拟合出存留分数和液泛速度的经验关联式。两个经验关联式都能在实验范围内很好地对存留分数和液泛速度进行预测,为工业过程放大和工程设计提供了重要的计算依据。Dispersed phase hold-up and flooding velocity were studied in a parallel-flow extraction column(0.1 m column diameter and 3 mm sieve diameter)by volume displacement and observational methods using kerosene-water and 30%tributyl phosphate(TBP)/kerosene-water systems.The experimental results show that dispersed phase hold-up increases with the increase of the two-phase superficial velocity,and the effect of dispersed phase velocity is larger than continuous velocity.The operating range was 0~29 L·h^-1 and 0~34 L·h^-1 in continuous phase and 10~166 L·h^-1 and 16~125 L·h^-1 in dispersed phase for the two systems,respectively.Furthermore,the correlations of the hold-up and flooding velocity were fitted by a dimensionless group method.A good agreement between the calculated values from these two empirical correlations and the experimental data was observed,which provides important information for the industrial scale up of the experimental equipment.

关 键 词：同向环流萃取装置 分散相存留分数 液泛速度 经验关联式 

分 类 号：TQ053.5[化学工程]