In order to realize the efficient classification and on-line regulation of cyclones,a combined cyclone was designed with Cavex cyclone as the structural prototype.The influence of flushing water pressure on the separation performance of the adjustable combined cyclone was studied by combining computational fluid dynamics numerical simulation with experiment.The RSM+VOF model was used to simulate the internal flow field of the cyclone by Fluent software.The pressure distribution and tangential velocity distribution of the adjustable combined cyclone under different flushing water pressures were compared and analyzed,and the particle trajectories of different particle sizes were predicted by the DPM model.The results of grading test show that it is difficult to adjust the grading particle size of conventional cyclone.The highest comprehensive efficiency of Hancock classification of-0.045 mm quartz particles is 63.80％.The adjustable combined cyclone reduces the bottom flow entrainment as the flushing water pressure increases.When the flushing water pressure is 0.02 MPa,the grading efficiency of-0.045 mm quartz particles can reach 79.58％.The results show that the combined cyclone has obvious advantages over the conventional cyclone in terms of grading efficiency and controllability.
Combined cycloneFlushing water pressureGrading efficiencyCFD numerical simulation
维普
万方数据
