Abstract: As a new emerging separation equipment, the filter-cyclone coupling separation device combines cyclone separation with filtration, which not only sufficiently exerted play to the advantages of the traditional hydrocyclone such as rapid, high-efficiency, and swirling vortex motion, but also enhances the separation accuracy of the traditional hydrocyclone with the deep filtering separation. The research results of some representative and practical built-in, external and wall-filtered separators are described from the differences of their various forms of structural characteristics and operating principles. Respectively Starting from the current research status on the structural parameters of the inlet, cyclone cavity, overflow pipe, cone section, underflow pipe, and filter material, etc., as well as on the operating conditions and media conditions such as inlet flow rate, pressure drop and pressure drop ratio, solid particle characteristics, fluid characteristics, split ratio/underflow rate, and booster mode, etc., are discussed and analyzed, focusing on the structural parameters and operating conditions of the filter-cyclone coupling separation device in the non-homogeneous media. Combining filtration-cyclone coupling separation with other separation processes, the development of new separation technologies and equipment will become the potential research direction of filtration-cyclone coupling separation technology.

Key words: hydrocyclone, filtration, coupling, solid-liquid separation, gas-liquid separation