Authors

Abstract

To improve the material conveying efficiency in the elbow lifting transportation process under negative pressure airflow and to solve pipeline material blockage issues, a chili cleaning device was used as the core model. CFD-DEM coupled simulation was employed to analyze the lifting process of non-spherical chili materials in the elbow pipe. Key parameter optimization was carried out through experimental design, determining the optimal parameter combination as a pipeline curvature of 2.03 and an air-to-feed ratio of 4.571. This combination achieved a conveying efficiency 4.406 times higher than the lowest efficiency case, and the uniformity of material transport under optimal parameters was verified through simulation. This study lays a solid foundation for the design of pipeline bends and the optimization of material conveying analysis.

Abstract in Chinese

为提高负压气流下弯管抬升输送过程物料输送效率，解决管道物料堵塞。以辣椒清选装置为核心模型，采用 CFD-DEM 耦合模拟，分析非球形辣椒物料弯管的提升过程。通过试验设计进行关键参数优化，确定最佳参数组合为管道曲率 2.03 和气送比 4.571。该组合的输送效率是最低效率情况下的 4.406 倍，并通过仿真验证了最佳参数组合下物料输送的均匀性。这为设备弯管的设计和物料输送分析的优化奠定了坚实的基础。