Optimum structural design of high-precision three-product heavy medium cyclone based on CFD Numerical Simulation

The high-precision three-product heavy media cyclone is a new-type three-product cyclone that made its debut only in recent years. The cyclone enjoys a host of special merits, such as the possibility to effect online real-time control of separating densities of its two stages, high separation precision, simple process layout and low cost of process remoulding work. The structure of the two stages of the cyclone has a great bearing on the separation effects. With an aim to further improve the separation precision of the cyclone, and its applicability to the plant′s washing process, the computational fluid dynamics (CFD) numerical simulation method is used to study the effects on the internal flow field of the cyclone produced by both operating and structural parameters. As revealed by study results, with the increase of the medium inlet velocity, the centrifugal coefficients of the flow in the two stages are likely to increase; the change of positions of medium inlet mainly affect the distributions of both radial and axial velocities; and when the medium inlet is set at the cyclone′s intermediate position with a deflection angle of 5°, the flow field in the first stage is least affected, which is beneficial to the improvement of separation effects.