膜分散式混合澄清萃取器性能研究

针对传统的混合澄清器存在的问题，将膜分散技术应用于萃取分离过程中，设计了新型的膜分散式混合澄清器，并选择正丁醇／丁二酸／水和正丁醇／磷酸／水两种研究体系，考察了该设备的传质及澄清性能。研究结果表明，膜分散式混合澄清器的传质效率高，单级萃取效率达到95％以上；处理量大，单位面积膜处理量最大可达225m3．m^-2.h^-1；澄清性能好，澄清时间低于20s。此外，膜分散式混合澄清器可以实现大相比操作。因此，膜分散式混合澄清器是一种高性能的萃取分离设备。

Extraction Performance of a New Mixer-settler with Membrane Dispersion Technique

In order to overcome the disadvantages of the conventional mixer-settlers, a new mixer-settler was designed by applying the membrane dispersion technique into solvent extraction. Two working systems of n-butanol / succinic acid / H2O and n-butanol / phosphoric acid / H2O were used to test the mass transfer and phase separation characteristics. The experimental results show that the novel extraction device has several advantages, such as higher mass transfer efficiency, very lower energy cost, higher capacity, and less phase separation time. In a single stage the mass transfer efficiency is more than 95%, and the capacity reaches as much as 225m3(m2h)-1. The clarification time in the settler is less than 20 seconds, which is much less than that in the conventional settler. And also, the operation with much higher phase ratio could be carried out in this equipment. Our experimental results prove that the new mixer-settler is a higher performance extraction equipment.