Numerical Simulation And Experimental Study On The Structure Optimization Of The Cyclone Separator

Cyclone separator is a sort of equipment that solid particles operated bymeans of centrifugal force are separated from gas current when they revolvedtogether. In order to improve the collection efficiency of cyclone separator,RSM turbulence model and phase coupling random orbit model were used tocalculate and simulate. The influence of exhaust pipe insertion depth ongas-phase flow field and pellet movement path in cyclone separator wassimulated. According to the simulation results, the physical model experimentwas carried on for adjusting cyclone intake manifold, which was consistentwith the mathematical simulation results.We must adopt Reynolds Stress Model based on anisotropy, QUICKformat and PRESTO format on the premise of good mesh for the simulation ofthe complex flow field in cyclone separator. According to the simulation results,The main flow in cyclone separator is double vortex; with the boundary ofLZVV, outside of which is the revolved flow downwards, center of which isthe revolved flow upwards, and their revolved direction is the same. Themovement of particles in the cyclone separator is very complex and muchmore random. Especially the small particles, their moving tracks are different,even if they are the same particles and their original location are the same.Experiment were carried in the geometry and movement similarconditions, To modulus of1:1high chromium cast iron of cyclone separatorfor experimental model the physical model experiment was carried on foradjusting cyclone intake manifold、wind pressure、actual density. The result ofsimulation shown that according to the empirical design, exhaust pipeinsertion depth of the cyclone separator is160mm, and the dust removalefficiency is85%.Under the same conditons, when the exhaust pipe insertiondepth is390mm,it can increase the probability of collision betweenparticulate matter and tube cone wall under the effect of airflow, thus theremoval efficiency enhances about8%.We get the dust removal efficiency of experiment and simulation, and thedifference is very small which is in an acceptable range. In this thesis, thesimulate technology is suitable for gas-solid two-phase flow movement incyclone separator. For structure optimization of cyclone separator, this thesislaid a theoretical foundation.