In this paper, a three-dimensional turbulent gas flow with solid particles was numerically simulated to optimize the performance of a cyclone preheater. The numerical approach for the flow development was based on unsteady simulations using the Reynolds Stress Model (RSM). The Discrete Phase Model (DPM) was used for the dispersion of particles due to turbulence in the fluid phase. The size of raw material solid particles ranged from 1 µm to 30 µm and the inlet gas velocity ranged from 10 m/s to 20 m/s were considered for parametric study. The main objective of this study consists of the performance evaluation of the cyclone pre-heater in terms of collection efficiency, pressure drop across the cyclone, heat transfer rate. The results indicate that the increase of particle size leads to increase collection efficiency of the particles up to 99.89% and temperature difference of about 212 K with the slight variation of pressure drop. The heat transfer rate decreases with increase in inlet air velocity due to less particles residence time inside the cyclone pre-heater. For a given cyclone design and working conditions, the maximum heat transfer was 87 W for 30 µm particle size with hot air velocity of 10 m/s.

在本文中，对带有固体颗粒的三维湍流进行了数值模拟，以优化旋风预热器的性能。流动发展的数值方法是基于使用雷诺应力模型（RSM）的非稳态模拟。离散相模型（DPM）用于由于液相中的湍流而分散颗粒。参数研究考虑了原料固体颗粒的大小，范围从1 µm到30 µm，入口气体速度从10 m / s到20 m / s。这项研究的主要目的包括对旋风预热器的性能进行评估，包括收集效率，旋风分离器上的压降，传热率。结果表明，粒径的增加导致颗粒的收集效率提高到99。89％，温差约为212 K，压降略有变化。由于旋风预热器内的颗粒停留时间减少，传热速率随进气速度的增加而降低。对于给定的旋风分离器设计和工作条件，对于30 µm的粒径，最大热传递为87 W，热风速度为10 m / s。