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ISSN 0254-0096 CN 11-2082/K

太阳能学报 ›› 2022, Vol. 43 ›› Issue (10): 343-349.DOI: 10.19912/j.0254-0096.tynxb.2021-0147

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基于EDEM的双螺旋反应器内物料运动与混合特性研究

刘攀笏, 马莉, 曾德望, 肖睿   

  1. 东南大学能源与环境学院,南京 210096
  • 收稿日期:2021-02-03 出版日期:2022-10-28 发布日期:2023-04-28
  • 通讯作者: 肖睿(1971——),男,博士、教授,主要从事生物质能方面的研究。ruixiao@seu.edu.cn

STUDY ON MOTION AND MIXING CHARACTERISTICS OF MATERIAL IN TWIN-SCREW REACTOR BASED ON EDEM

Liu Panhu, Ma Li, Zeng Dewang, Xiao Rui   

  1. School of Energy and Environment, Southeast University, Nanjing 210096, China
  • Received:2021-02-03 Online:2022-10-28 Published:2023-04-28

摘要: 为了研究双螺旋热解反应器内物料的运动和混合特性,采用EDEM软件进行数值模拟。结果表明:物料由外螺旋向内螺旋的输送是通过外螺旋将堆积的物料抬升进而使物料顺利进入内螺旋来实现的;在模拟工况下,大转速下的混合效果明显好于小转速下,此外还发现外螺旋转速增大使得颗粒的混合作用增强;在单节螺旋中,粒径较小的生物炭颗粒更易在螺旋叶片外侧分布,颗粒群的前一部分中粒径较大的生物质颗粒占据更大的比例。

关键词: 生物质能, 热解, 双螺旋反应器, 离散单元法, 混合, EDEM软件

Abstract: In order to study the motion and mixing characteristics of materials in the twin-screw pyrolysis reactor, EDEM software is used for numerical simulation. The results show that the materials from the outer screw to inner screw transport is achieved by the outer screw to lift the stacked materials, so that the material smoothly enters the inner screw. Under the simulation conditions, the mixing effect at large rotating speed is obviously better than that at small rotating speed. In addition, it is found that the mixing effect of particles is enhanced with the increase of the outer screw rotating speed. In a single pitch of screw, biochar particles which have smaller particle size are more likely to be distributed on the outside of screw blade, and biomass particles which have larger particle size occupy a larger proportion in the first part of the particles group.

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