STUDY ON DESALINATION PROCESS USING LIQUID MEMBRANE

液膜海水淡化工艺研究

• 批准号: 07555549
• 负责人: HOZAWA Mitsunori
• 金额: $ 0.77万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555549/
• 关键词: LIQUID MEMBRANE; DESALINATION PROCESS; EMULSION; EMULSION LIQUID MEMBRANE; EXTRACTION; HOLLOW FIBER; STIRRED CELL; SURFACTANT; 中空系; バルク液膜; 隔膜; 物質移動係数

For the establishment of the novel desalination system in the downstream processing of biochemical products, the following two apparatus using the liquid membrane system were developed in the present work and their characteristics were investigated experimentally. In the design of the apparatus for the desalination, it is important to contact the two kinds of W/O emulsions to extract the cation and anion with the feed solution, preventing the emulsions from contacting each other.Apparatus (1) : The hollow fibers, through which the two kinds of W/O emulsions were separately passed, were put in the stirred cell including the feed solution.Apparatus (2) : The stirred cells including the two kinds of W/O emulsions respectively were separated by the partition through which the feed solution can pass but each emulsion can not.As a result, the apparatus (1) was not available for the desalination system because it is difficult to keep the interface between the emulsion phase and the feed solution in the pore of the hollow fiber adjusting the inner and outer pressures of the fiber. While, in the apparatu (2), it was found that the two stainless steel meshes which were coated by the fluorine-contained polymers and piled at intervals of 5 mm are useful as the partition to separate the emulsions. Also, the collision rate of emulsions to the partition is one of the important factors to control the leakage of the emulsions, and we can accomplish to transfer only the ions by adjusting the dispersion conditions of emulsions and the volume ratio of emultions to that of the feed solution.

为了在生化产品下游加工中建立新型海水淡化系统，本工作开发了以下两种使用液膜系统的装置，并对其特性进行了实验研究。在脱盐装置的设计中，重要的是使两种W/O乳液与进料溶液接触以提取阳离子和阴离子，防止乳液彼此接触。装置(1)：将两种W/O乳液分别穿过的中空纤维放入包括进料溶液的搅拌室中。装置(2)：包括两种W/O乳液的搅拌室。 W/O乳液分别被进料溶液可以通过但每种乳液不能通过的隔板分开。因此，设备(1)不适用于脱盐系统，因为很难在中空纤维的孔中保持乳液相和进料溶液之间的界面，调节纤维的内部和外部压力。而在装置(2)中，发现涂有含氟聚合物并以5mm的间隔堆叠的两个不锈钢网可用作分隔乳液的隔板。另外，乳液与分区的碰撞速率是控制乳液渗漏的重要因素之一，通过调节乳液的分散条件和乳液与料液的体积比，可以实现仅离子的转移。