Purification of granular sediments from wastewater using a novel hydrocyclone

Abstract

Wastewater is an inevitable product in industry. How to remove fine particles and enhance the impurity removal efficiency of the wastewater purification equipment has always remained a hotspot issue. In this study, a novel hydrocylone with bi-symmetrical involue inlet, thick-wall overflow pipes and conical segment structure was designed and compared with other hydrocyclones including different structures of inlets, i.e., The flow field and separation performance of the novel hydrocylone were investigated via numerical analysis, The simulation results show that the inner flow field in the novel hydrocyclone is more stable, accompanied with significant decline in both short-circuit and circulating flow rates; moreover, using the novel hydrocyclone, the tangential velocity, the axial velocity and the pressure increase significantly, which can make the particle obtain great centrifugal driving force and effectively reduce the number of dislocated particles. The recovery ratio of fine particles with the diameter of 1 μm also shows significant enhancement. Conclusively, using the designed novel hydrocyclone can obtain higher product quality. The present study can provide theoretical foundation for the design of a novel hydrocyclone.