陶瓷干法造粒机造粒立柱个数对混料效果的数值模拟

Numerical Simulation for the Mixing Effect of the Granulation Column Groups in Ceramic Dry Granulator

针对陶瓷干法造粒机造粒立柱个数对混料效果的影响,结合实验与数值模拟对比分析混料过程造粒立柱个数对混料堆积度的影响。基于CFD方法建立造粒立柱的数学物理模型,模拟混料过程中造粒立柱数目变化情况,并实验测得颗粒堆积度随造粒立柱个数变化的情况。仿真结果与实验数据对比表明:当造粒立柱个数为6,仿真结果显示颗粒堆积度占整体颗粒体积的20%-23%,实验测得颗粒堆积度占整体颗粒体积的19%-24%;当造粒立柱个数为8,仿真结果显示颗粒堆积度占整体颗粒体积的5%-7%,实验测得颗粒堆积度占整体颗粒体积的6%-9%;当造粒立柱个数为10,仿真结果显示颗粒堆积度占整体颗粒体积的11%-14%,实验测得颗粒堆积度占整体颗粒体积的13%-15%。仿真结果与实验数据对比分析说明:当造粒机造粒立柱个数为8时,混料效果最好。

In order to investigate the mixing effect of granulation columns, the influence of granulation column numbers on the accumulation degree was analyzed by experiment and numerical simulation. The mathematical and physical models of the granulation columns were established based on CFD to simulate the change of the granulation column numbers in the mixing process. The accumulation degree that varied with the granulation column number was measured. The simulation results and experimental data showed: when the number of granulation columns were 6, the simulated accumulation volume accounted for 20-23% of the total of all particles while the tested made up 19-24%;when the number of granulation columns were 8, the simulated accumulation volume accounted for 5%-7% of the total of all particles while the tested made up 6-9%;when the number of granulation columns were 10, the simulated accumulation volume accounted for 11-14% of the total of all particles while the tested made up 13-15%;The comparison between the simulation results and the experimental data indicated that when the number of granulation columns was 8, the mixing effect was the best.