φ50折流板脉冲萃取柱水力学性能  

Hydrodynamics of φ50 pulsed extraction column with discs and doughnuts

作　　者：吴伟[1] 王悦云[1] 景山[1] 吴秋林[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京102201

出　　处：《化工学报》2006年第12期2885-2891,共7页CIESC Journal

摘　　要：以30%TRPO煤油溶液和1mol·L-1硝酸溶液为体系,在50折流板脉冲萃取柱中考察了折流板脉冲萃取柱的操作参数(脉冲振幅、脉冲频率、流速和流比)和结构参数(开孔率和板间距)对其水力学性能(液泛通量、液泛存留分数和正常操作时分散相存留分数)的影响.结果表明:在乳化操作区,液泛通量随着开孔率增加、脉冲强度和流比的减小而增大,与板间距无关;根据液泛存留分数的结果,给出了最优开孔率为23%;此时正常操作时分散相存留分数与连续相的流速、流比和脉冲振幅呈正比,而与脉冲频率无关,浸润性的影响造成了板间距对以硝酸溶液和30%TRPO煤油溶液为连续相时的分散相存留分数影响规律不同.The effects of the operation parameters, such as pulse amplitude, pulse frequency, fluid velocity and flow ratio, and structure parameters, such as packing free ratio and packing distance, on the hydrodynamics, including the flooding rate, flooding holdup and holdup of dispersed phase, of φ50 pulsed extraction column with discs and doughnuts were experimentally studied for the 30% trialkyl phoshine oxide （TRPO） （in kerosene） /1 mol·L^-1 nitric acid/water system. Experimental results indicated that the flooding rate increased with increasing packing free ratio and decreasing pulse strength, and was independent of packing distance. Based on the results of the flooding holdup, theoptimal packing free ratio of 23% was suggested. The holdup of dispersed phase is directly proportional to the velocity of continuous phase, flow ratio and pulse amplitude, but independent of pulse frequency. The wetting of packed materials led to the different effects of packing distance on the holdup of dispersed phase for 30% TRPO （in kerosene） or 1 mol· L^-1 nitric acid as the continuous phase.

关 键 词：折流板脉冲萃取柱 液泛通量 存留分数 液泛存留分数 

分 类 号：TQ028.3[化学工程]