Hydrocyclones have been extensively applied for solid–liquid or liquid–liquid separations in various industries. However, the exact mechanisms underlying the enhanced separation technologies based on the optimization of geometric parameters of hydrocyclones remain unclear, and a number of research teams have performed numerous studies to enlarge the application scope of hydrocyclones by optimizing geometric parameters. This review provides a comprehensive state-of-the-art review of hydrocyclone enhanced-separation technologies. The enhanced-separation technologies are categorized into ten groups: cylindrical section, inlet, vortex finder, underflow pipe, conical section, hydrocyclone inclination angle, hydrocyclone insertion, conical-section/apex water injection, reflux device, and multi-hydrocyclone arrangement. These enhanced-separation technologies were analyzed and summarized according to the key separation-performance parameters of hydrocyclones, such as separation efficiency, cut size, split ratio, energy consumption, and capacity. It is expected that both the reviewed contents and the proposed challenges and future methodologies and technologies may provide research fellows working in this field with an improved understanding of enhanced separation technologies of hydrocyclones.

水力旋流器已广泛应用于各种行业中的固液分离或液液分离。然而，基于水力旋流器几何参数优化的增强分离技术背后的确切机制仍不清楚，许多研究团队已经进行了大量研究，以通过优化几何参数来扩大水力旋流器的应用范围。这篇综述提供了对水力旋流器增强分离技术的最新技术综述。增强分离技术可分为十类：圆柱形部分，入口，涡流探测器，底流管，圆锥形部分，水力旋流器倾斜角，水力旋流器插入，圆锥形截面/顶部注水，回流装置和多水力旋流器布置。根据水力旋流器的关键分离性能参数，如分离效率，切割尺寸，分离比，能耗和容量，对这些增强的分离技术进行了分析和总结。预计审查的内容和提出的挑战以及未来的方法和技术都可以为从事该领域的研究人员提供对水力旋流器增强分离技术的更好理解。