湿法烟气脱硫的理论和实验研究(IV)——高雷诺数时的传质经验方程  

Theoretical and Experimental Investigations of Wet Flue Gas Desulfurization (Ⅳ) Empirical Correlations of Mass Transfer at High Reynolds Numbers

作　　者：钟秦[1] 

机构地区：[1]南京理工大学化工学院

出　　处：《南京理工大学学报》1999年第3期257-260,共4页Journal of Nanjing University of Science and Technology

基　　金：国家留学基金委资助项目;江苏省青年科技基金

摘　　要：在中试湿壁塔中，采用ＳＯ２／ＮａＯＨ和空气／Ｈ２Ｏ系统，实验研究了５０℃和高雷诺数时的气液传质速率。实验结果表明，气相雷诺数（ＲｅＧ）和液相雷诺数（ＲｅＬ）分别在７６００～１３５００和４７００～１２０００的范围内，气相舍伍德数（ＳｈＧ＝（ｋＧａｃｄｉ）／ＤＧ）分别与ＲｅＧ的１０４次方和ＲｅＬ的０２０７次方成正比。ＳｈＬ分别与ＲｅＧ的０６４次方和ＲｅＬ的０４３８次方成正比。高雷诺数时的液膜波动提高了相界面积和湍流程度，从而导致气相和液相传质系数的提高。In a pilotscale wettedwall column,the rate of gas and liquid phase mass transfer was investigated by using SO 2/NaOH and Air/H 2O reaction systems at 50℃ and high Reynolds numbers.The experimental results show that in gas phase Reynolds numbers ( Re G )range from 7600 to 13500 and liquid phase Reynolds numbers ( Re L ) from 4700 to 12000,gas phase Sherwood number ( Sh G )depends on Re G and Re L raised to the power of 1.04 and the power of 0.207,respectively;liquid phase Sherwood number ( Sh L )depends on Re G and Re L raised to the power of 0.64 and the power of 0.438,respectively.The waves on the liquid film at high Reynolds numbers increase interfacial area and turbulence,and lead to increasing mass transfer coefficients of gas phase and liquid phase.

关 键 词：雷诺数 烟气脱硫 湿法 湿壁塔式以应器 

分 类 号：X701[环境科学与工程—环境工程] X511