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

ObjectiveThis article mainly redesigns the structural parameters of the Vorsyl cyclone to achieve the separation of water media. MethodThe 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. ResultThe 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. ConclusionWhen 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.