چكيده به لاتين
In this study, the separation of silica particles was studied with using a two-input cyclone separator with rotary body. The effects of rotation on efficiency of cyclone, experimentally and using CFD simulation was investigated. The variables studied were particle size, flow rate, and cyclone body velocity. In this study, it has been shown that the particle size become more intense about 1 to 2, the increase in the flow rate of about 3 to 5, and the increase in body speed of 10 to 13 percent leads to improved efficiency. Also shown the reverse rotation of body than input flow about 48% of efficiency decreases. Then the Fluent software simulated the system only for validation of results. CFD simulation was performed using a multi-phase olerian-olerian model for Air-silica powder flow using Fluent software. To simulate disturbances, the RNG k-ε model, which is both accurate and fast, is used. To solve the pressure and velocity equations simultaneously, the SIMPLE algorithm is used and the QUICK method is used to distribute the momentum equations. The simulation results show that increasing the flow rate and cyclone body rotation velocity leads to an increase in tangential velocity and hence increased centrifugal force, resulting in increased cyclone efficiency. The maximum efficiency obtained from the simulation is about 90% and the maximum laboratory efficiency is about 97%. The results obtained from the simulation of CFD are about 7% lower than the results of the experiment but the difference between the different states together is almost the same as the experimental results and proves the accuracy of the results.
Keywords: Rotary cyclone, effect of rotation, cyclone separators, Efficiency
