Numerical Simulation And Optimal Design Of Floating Ball Demister

The design of the demister in the wet desulfurization tower not only requires high efficiency of separation performance,but also requires lower pressure loss,anti-scaling,anti-clogging,corrosion resistance,easy cleaning and maintenance.At present,the most commonly used corrugated board modified with hook,although done some improvements in separation efficiency and anti-blocking,but the plugging phenomenon still exists;The mist demister has high separation efficiency but it is easy to be blocked.The swirl centrifugal defogger is not easy to be blocked,but the pressure drop is large.Big investment and difficult maintenance are defects of these demisters.To address these issues,this paper presents a new type of float type demister based on the study of the mechanism of inertia separation gas-liquid separation and the influence of various factors on separation efficiency and pressure drop.And the numerical simulation technology is used to compare and analyze the different float layers.And its internal flow field and the demister performance are studied,by the numerical simulation.The results show that the main factors affecting the pressure drop of the demister system are the intake velocity,the distance between the balls and the relative position between the balls.They have an influence on the demister performance in varying degree.Studying the relationship between the intake velocity,the sphere spacing and the resultant force,and the three-dimensional surface and the contour map are obtained.According to the contour map,when weight of ball valuing 50 g,diameter of demister valuing 0.6 m,intake velocity valuing 4.25m/s,the sphere spacing is 100 mm.And its internal flow field and the mist performance are studied.The results show that drop pressure and demisting efficiency are increased with the increase of the number of ball layers,in varying degree.When the droplet diameter is 30 ?m,the ball layer increases from one to four layers,demisting efficiency increasing by 70.85%,39.35% and 19.66% respectively,the drop pressure increasing by 36.05%,33.36% and 36.05% respectively.With the increase of the number of ball layers,the flow field becomes uniform gradually,turbulent kinetic energy increased.This study provides a theoretical basis for the design and demister performance.The results show that the floating ball demister can increase the elasticity of oper ation theoretically with the characteristic of less investment,low maintenance cost,rins ing easily and no-blocking.