Impact of draft plate on the separation performance of gas-solid cyclone separator

Abstract

Cyclone separators are extensively utilized in the mining, metallurgy, and energy industries due to their high efficiency in gas-solid separation. This study simulates gas-solid two-phase flow within a cyclone separator using the Eulerian-Lagrangian approach, with the mathematical model validated through experimental data. The influence of draft plates and inclination angle on flow patterns, particle dynamics, and separation efficiency is thoroughly investigated. The findings reveal that the incorporation of guide plates reduces energy losses and mitigates the detrimental effects of short-circuit flow on separator performance. Specifically, the pressure drop decreases as the draft plate angle increases, while a smaller draft plate angle significantly reduces short-circuit flow and enhances system stability. Moreover, draft plates effectively decrease the frequency of particle-wall collisions. At an optimal draft plate angle of 90°, the pressure drop is reduced by 71 %, and the short-circuit flow length decreases by 27 % compared to a traditional cyclone separator, indicating improved performance. Overall, this study demonstrates that the use of draft plates markedly enhances gas-solid phase interactions in cyclone separators.