密封式错流旋转填料床气膜控制传质过程研究  

Study on the process of gas-film controlled mass transfer in sealed cross-flow rotating packed bed

作　　者：康荣灿[1] 刘有智[1] 刘振河[1] 李鹏[1] 刁金祥[1] 

机构地区：[1]中北大学山西省超重力化工工程技术研究中心,山西太原030051

出　　处：《化学工程》2007年第12期1-4,50,共5页Chemical Engineering(China)

基　　金：山西省自然基金资助项目(20051015)

摘　　要：在密封式错流旋转填料床中,利用浓度为0.926 mol/L的NaOH溶液吸收空气中体积分数为0.5%—1%的CO2气体,对气膜控制过程传质性能进行了研究。实验表明:密封式错流旋转填料床CO2的吸收率随气体流量的增大而减小,在低转速下随旋转填料床的转速增大气体吸收率上升较快,高转速时影响变小;转速大于1 000 r/min情况下,CO2的吸收率随液量的增大而上升,转速小于1 000 r/min情况下,CO2的吸收率随液量增大而变小。建立了密封式错流旋转填料床气膜控制过程的气体吸收模型,经验证实验结果与模型计算结果吻合较好。The gas-film controlled mass transfer characteristic was investigated in sealed cross-flow rotating packed bed（RPB）, where the CO2 in the air （φ= 0.5%-1% ） was absorbed by NaOH solution [ c（NaOH） = 0. 926 mol/L]. The experimental data shows that the CO2 removal efficiency decreases with increasing of gas flux; it increases with the increase of liquid flux under the condition of rotating speed higher than 1 000 r/min ; however, it decreases with the increase of liquid flux under the condition of rotating speed less than 1 000 r/min. A mathematical model was developed for gas-film controlled mass transfer in sealed cross-flow RPB. The calculation values from mathematical model accord with the experimental values well.

关 键 词：旋转填料床 错流 传质 气膜控制 

分 类 号：TQ021.4[化学工程]