Membrane dispersion extraction is a process with a macroporous membrane as dispersion medium. In this paper, 30%TBP(in kerosene)/nitric acid/H 2O is chosen as an experimental system. The mass transfer characteristics ...Membrane dispersion extraction is a process with a macroporous membrane as dispersion medium. In this paper, 30%TBP(in kerosene)/nitric acid/H 2O is chosen as an experimental system. The mass transfer characteristics are studied in two kinds of membrane dispersion modules.In order to improve mass transfer performance, a concentric inner element is designed. The effects of transmembrane pressure and the flux of continuous phase on efficiency, as well as on the flux of dispersion phase are investigated. The experimental results show that the flux of disperse phase is increased with an increase of the transmembrane pressure. However, it could hardly be influenced by the flux of continuous phase. mass transfer efficiency decreases slightly when the pressure or the flux of continuous phase is increased. The concentric inner element can improve the mass transfer performance greatly. Membrane dispersion extraction can be carried out with a higher mass transfer efficiency.展开更多
为提高陶瓷微滤膜净化微污染水的效果,采用电絮凝预处理工艺提高陶瓷膜的出水水质。研究了电流密度、进水流量以及过滤模式对组合工艺出水水质的影响,得到了最佳运行参数:电流密度2.0 m A/cm2,进水流量4 L/min,过滤模式为错流过滤浓水...为提高陶瓷微滤膜净化微污染水的效果,采用电絮凝预处理工艺提高陶瓷膜的出水水质。研究了电流密度、进水流量以及过滤模式对组合工艺出水水质的影响,得到了最佳运行参数:电流密度2.0 m A/cm2,进水流量4 L/min,过滤模式为错流过滤浓水全排除。同时,对比了化学絮凝和电絮凝对陶瓷微滤膜出水水质的影响,结果表明:电絮凝对有机物的去除效果不及化学絮凝,两者的差距随着Al3+浓度的增加而增大。展开更多
文摘Membrane dispersion extraction is a process with a macroporous membrane as dispersion medium. In this paper, 30%TBP(in kerosene)/nitric acid/H 2O is chosen as an experimental system. The mass transfer characteristics are studied in two kinds of membrane dispersion modules.In order to improve mass transfer performance, a concentric inner element is designed. The effects of transmembrane pressure and the flux of continuous phase on efficiency, as well as on the flux of dispersion phase are investigated. The experimental results show that the flux of disperse phase is increased with an increase of the transmembrane pressure. However, it could hardly be influenced by the flux of continuous phase. mass transfer efficiency decreases slightly when the pressure or the flux of continuous phase is increased. The concentric inner element can improve the mass transfer performance greatly. Membrane dispersion extraction can be carried out with a higher mass transfer efficiency.
文摘为提高陶瓷微滤膜净化微污染水的效果,采用电絮凝预处理工艺提高陶瓷膜的出水水质。研究了电流密度、进水流量以及过滤模式对组合工艺出水水质的影响,得到了最佳运行参数:电流密度2.0 m A/cm2,进水流量4 L/min,过滤模式为错流过滤浓水全排除。同时,对比了化学絮凝和电絮凝对陶瓷微滤膜出水水质的影响,结果表明:电絮凝对有机物的去除效果不及化学絮凝,两者的差距随着Al3+浓度的增加而增大。