Simulation on mixing granular materials in screw conveyor

QI Huabiao; XU Ji; SONG Wenli; GE Wei

doi:10.11949/j.issn.0438-1157.20171196

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Simulation on mixing granular materials in screw conveyor

更新时间：2025-12-10

- Simulation on mixing granular materials in screw conveyor
- CIESC Journal Issue 1, Pages: 371-380(2018)
- 作者机构：
  
  1. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京,100190
  2. 中国科学院大学化学化工学院,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171196
  CLC： Q536.9
- Online First：05 January 2018，
  
  Published：05 January 2018
- 稿件说明：
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QI Huabiao, XU Ji, SONG Wenli, et al. Simulation on mixing granular materials in screw conveyor[J]. CIESC Journal, 2018, (1): 371-380.
DOI：

QI Huabiao, XU Ji, SONG Wenli, et al. Simulation on mixing granular materials in screw conveyor[J]. CIESC Journal, 2018, (1): 371-380. DOI： 10.11949/j.issn.0438-1157.20171196.

摘要

采用离散单元法（discrete element method，DEM）模拟了工业尺度螺旋输送器中两种不同密度与粒径的颗粒的流动状态与混合过程。采用Lacey混合指标的定量分析表明，该输送器的混合性能强烈地依赖于操作条件和结构尺寸，转速和物料的添加速率对混合效果影响最大，其次是混合段螺距和物料粒径。根据工业生产的具体要求，可参考上述发现合理地选择技术参数、提高混合效率、降低能耗。

Abstract

Flowing and mixing granular materials of two different sizes and densities in an industrial-scale screw conveyor was studied by computer simulation using the discrete element method(DEM). Quantitative analysis results by the Lacey mixing index showed that mixing performance of the screw conveyor was dependent strongly on operational conditions and structural dimensions. Both screw rotating speed and material feeding rate had dominant effects on mixing efficiency

followed by granular material sizes and screw pitch in the mixing region. To reduce energy consumption and improve mixing performance in production

reasonable operation parameters of screw conveyors could be selected according to these findings.

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