Numerical Simulation of Internal Flow Field and Particle Motion in Vorsyl Water-only Cyclone

[Objective]This article mainly redesigns the structural parameters of the Vorsyl cyclone to achieve the separation of water media. [Method]The Effect of three throat plate shapes on the internal flow field of the Vorsyl water medium cyclone and the movement of particles of different densities were studied through simulation. A RSM model and a VOF model were employed to simulate the gas-liquid two-phase flow field in three distinct throat-shaped Vorsyl water-only cyclones. [Result]The results showed that the pressure and velocity fields in the three types of throat shaped Vorsyl water-only cyclone had the same distribution rules, but the positive cone Vorsyl water-only cyclone had smaller flow separation ratio and pressure drop, and had an obvious axial zero velocity envelope surface, which was conducive to separation. A comparison of the self-generated medium density field in a three-throat Vorsyl water-only cyclone was made using a Mixture model. The results indicated that the density field in the cyclone remained consistent, however, the positive cone generated a higher and more secure density field at the throat gap, which was advantageous for separation. Using a DPM model, the trajectory of particles with different densities with a particle size of 1 mm in a Vorsyl water-only cyclone was simulated. The results showed that a positive cone Vorsyl water-only cyclone could allow higher density particles to enter the overflow. [Conclusion]When the fine particle content of the added self-generating medium is 30%, the particle size is 0.075 mm, and the density is 1 700 kg/m3, the positive cone Vorsyl water medium cyclone forms a self-generating medium field with a higher density at the gap of the throat plate, reaching approximately 1 300 to 1 350 kg/m3. At this point, 1 mm particles weighing 1 450 kg/m3 can enter the overflow pipe.