静电聚结技术在油水分离中的研究及应用进展

静电聚结技术具有快速、清洁、高效的特性,通常不需要添加化学药剂,不产生附加污染物,同重力沉降等方法相比,对于小粒径水滴或油水界面稳定的油水混合液适应性更强。本文简要介绍了静电聚结技术的聚结原理,总结了传统电脱水技术、管式静电预聚结技术和容器内置式静电聚结技术(VIEC)的研究和应用进展,对比分析了三类静电聚结技术的适用领域及技术特点,介绍了静电聚结与湍流/剪切流耦合技术的研究现状,最后对静电聚结技术的发展方向进行归纳和展望。

Research and Application Progress of Electrostatic Coalescence Technology in Oil-Water Separation

Electrostatic coalescence technology has the characteristics of fast, clean and high efficiency, usually unnecessary additional chemical reagent when it working so that no additional pollutants are produced. Compared with gravity sedimentation method, it is more suitable for water droplet of small size or oil-water mixture with stable oil-water interface. In this paper, we briefly reviewed the coalescence principle of electrostatic coalescence, summarized the research and application progress on traditional electric dehydration technology, pipe electrostatic pre-coalescence and vessel internal electrostatic coalescence, compared and analyzed the application fields and technical characteristics of three kinds of electrostatic coalescence, introduced the current research situation of electrostatic coalescence and turbulence/shear flow coupling technique. Finally, the development trend of electrostatic coalescence is summarized and predicted. Key words electrostatic coalescence, oil-water separation, electric dehydration technology, pipe electrostatic pre coalescence , vessel internal electrostatic coalescence