Effect of transverse vortex on performance of wave plate demister

Abstract

AbstractCorrugated plate mist eliminators are commonly employed in industrial processes to eliminate liquid droplets from gas flows. Engineering a mist eliminator with excellent separation performance including high removal efficiency and low pressure drop and is a primary consideration in industrial processes. This study focuses on the separation of tiny droplets reinforced by the generation of transverse vortices with the help of curved wings. The Euler–Lagrange model is developed to predict the behavior of droplets in gas streams, and velocity distributions and particle trajectories on the demisters were derived. And the prediction equations of the curved wing structure sizes on the efficiency and pressure drop of the mist eliminator are established. The results demonstrated that the grade separation efficiency of 10~20 μm droplet was significantly improved by 25.7%~66.51%. Moreover, for the total removal efficiency, it could be improved from .8 to .92 at 5.5 m s−1, and the accompanying resistance factor was as low as 2.7. Among the proposed arrangements, the double‐row single‐column array arrangement was characterized by higher demisting efficiency and lower pressure drop. Overall, compared to other optimization methods, this proposed optimization approach by means of transverse vortices yielded a higher demisting efficiency and less pressure drop.