纤维膜萃取分离器内两相流动、传质特性的研究——进料顺序的影响  

Flow and Mass-Transfer of Two Fluids in Fiber Film Extractor——Effects of Feeding Sequence

作　　者：张海光[1] 范怡平[1] 李汝新[1] 卢春喜[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《高校化学工程学报》2010年第6期936-942,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金项目(20776155)

摘　　要：纤维膜萃取分离器是一种新型高效传质设备。今以苯甲酸水溶液-煤油为传质体系,在一套70mm×2630mm的有机玻璃纤维液膜萃取分离器冷态实验装置上,在纤维丝填充密度1.89%～5.08%、水-油或油-水体积流量比分别为3～6的操作区间内,考察了不同油、水进料顺序对纤维膜分离器内两相流动、传质性能的影响。结果表明,若水先引入,油后引入,体积传质系数随水-油体积流量比W/O的增大而减小;而在先油后水的情况下,体积传质系数随水-油体积流量比W/O的增大呈先增大后减小的趋势,并在水-油流量比W/O为5附近取得最大值;在两种进料方式下,体积传质系数均随纤维丝填充密度的递增而先增后减,并在填充密度为3.0%～3.5%之间取得最大值。根据实验数据,分别给出了对应两种进料顺序的传质系数计算关联式,计算值与实验值吻合较好。The fiber film extractor is a novel high-efficiency equipment for liquid-liquid contacting and mass-transfer.In this paper,the effects of the feeding sequences of two liquids added into the fiber film extractor were investigated.Kerosene（O） and aqueous benzoic acid solution（W） were used as the two contacting liquids.Varying the packing density of the fibers in the extractor from 1.89% to 5.08% and the flowrate ratios of the two liquids W /O from 3 to 6,the hydrodynamics and the mass-transfer of the fiber film extractor were studied by using a plexiglass pipe extractor model with 70 mm ID and 2630 mm height.The results show that,if feeding aqueous benzoic acid solution firstly,the mass-transfer coefficient decreases with increasing the flowrate ratio W /O.However,if feeding kerosene firstly,the mass-transfer coefficient increases at first and then decreases with a peak appearing at W/O=5 approximately.For both feeding sequences,the mass-transfer coefficient increases firstly and then decreases with the increase of the fiber packing density,and both the optimal fiber packing densities for these two feeding sequences are in the range of 3.0% ～3.5%.

关 键 词：纤维膜萃取分离器 进料顺序 传质系数 填充密度 流量比 

分 类 号：TQ028.8[化学工程] TQ028.32