驱油剂作用下水中油滴的微观聚结行为及聚并机理研究

把水中的微小油滴聚结成大油滴是三元复合驱污水处理的难题与技术关键。单一组分或多组分化学药剂协同作用下油滴的聚结与破裂规律涉及胶体与界面化学、电化学和微观受力等问题，目前对该问题的研究还不深入，微观研究与数值模拟不同化学药剂作用下油滴的运动、聚结行为还有很多科学问题需要解决。本项目拟改进模拟实际采油污水中油滴聚结行为的微观实验系统，采用高速显微实验方式研究驱油剂作用下油滴运动变形的内在机理及界面薄化与破裂的演化特征，在此基础上总结水包油分散体系中油滴间的碰撞与聚结规律；采用原子力显微镜研究油滴之间的动态作用力，建立定量表征驱油剂浓度与油滴之间作用力的关系模型。该研究将阐释水中油滴的聚并机理，突破制约含油污水处理技术发展的理论瓶颈，为三元复合驱含油污水的处理奠定科学基础。

Coalescence of microsize oil droplet in water is difficult and crucial in treating ASP flooding wastewater. Characteristics of coalescence and breakup of oil droplet under the synergy of single component and multi-component chemical agents are involved in the problems of colloid and interface chemistry, electrochemistry and microscopic force, which have not been understood. Many problems involving numerical simulation and micro experimental research on motion, coalescence of oil droplet in different chemicals need to be solved. This research aims to build a micro experimental system through the simulation of coalescence behavior of oil droplets in waste water. In this system, the mechanism of oil droplets deformation and the thinning, breakup process of interfacial film in oil displacement agent are researched with high-speed microscope system to reveal the discipline of collision and coalescence that happened in oil-in-water dispersed system. The dynamic force between oil droplets is researched with atomic force microscopy and a quantitative model is established to characterize the relationship between the concentration of oil displacement agent and the force between oil droplets. This study will explain the coalescence mechanism of oil droplets in water, break through the theoretical bottleneck restricting the development of oily wastewater treatment technology, and lay a scientific foundation in treating ASP flooding wastewater.