纤丝状生物质颗粒在抄板滚筒内混合特性研究

顾丛汇; 刘源; 赵海超; 袁竹林

doi:10.19912/j.0254-0096.tynxb.2023-0981

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (10) : 655-662. DOI: 10.19912/j.0254-0096.tynxb.2023-0981

纤丝状生物质颗粒在抄板滚筒内混合特性研究

顾丛汇¹, 刘源¹, 赵海超¹, 袁竹林²

作者信息 +

RESEARCH ON MIXING CHARACTERISTICS OF FILAMENTOUS BIOMASS PARTICLES IN ROTARY DRUM WITH STRAIGHT LIFTERS

Gu Conghui¹, Liu Yuan¹, Zhao Haichao¹, Yuan Zhulin²

Author information +

文章历史 +

摘要

基于离散单元法对抄板滚筒内纤丝状生物质的运动与混合特性展开研究。针对纤丝状生物质颗粒的特殊结构构建颗粒几何模型和固-固碰撞模型,探究滚筒转速、抄板数量和抄板高度对纤丝状颗粒群混合质量的影响。研究发现,滚筒抄板对纤丝状颗粒群的抛撒作用是颗粒混合良好的关键。提高滚筒转速可促进颗粒混合,但转速的增大对混合的帮助存在上限,转速为10 r/min时混合质量最高;纤丝状生物质颗粒的混合质量与抄板高度密切相关,抄板高度h=25 mm时混合效果最佳。

Abstract

A numerical simulation was conducted to investigate the flow mixing behavior of filamentous particles in a horizontal rotating drum based on the Discrete Element Method in this paper. The particle geometric model and the solid to solid collision model were established for the special structure of filamentous particles. The effects of drum rotation speed, number of lifters, and lifter height on the mixing quality of filamentous particle groups were investigated by using digital image analysis method. The results show that the dispersion of filamentous particle groups by lifters is the key to good particle mixing. Although the increase of the rotation speed or number of lifters contribute to the particle mixing quality, there is an upper limit to how much an increase rotation speed can help with mixing process. The simulation results indicate that the mixing quality of filamentous particles is negatively correlated with the height of the lifter, and the best mixing effect is achieved when the height of the board is 25 mm.

导出引用

顾丛汇, 刘源, 赵海超, 袁竹林. 纤丝状生物质颗粒在抄板滚筒内混合特性研究[J]. 太阳能学报. 2024, 45(10): 655-662 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0981

Gu Conghui, Liu Yuan, Zhao Haichao, Yuan Zhulin. RESEARCH ON MIXING CHARACTERISTICS OF FILAMENTOUS BIOMASS PARTICLES IN ROTARY DRUM WITH STRAIGHT LIFTERS[J]. Acta Energiae Solaris Sinica. 2024, 45(10): 655-662 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0981

中图分类号： TQO27.1

参考文献

[1] LU G, THIRD J R, MÜLLER C R. Discrete element models for non-spherical particle systems: from theoretical developments to applications[J]. Chemical engineering science, 2015, 127: 425-465.
[2] 刘贤东, 奚英涛, 由长福. 卧式搅拌床内生物质颗粒的轴向混合与停留时间[J]. 太阳能学报, 2018, 39(3): 844-849.
LIU X D, XI Y T, YOU C F.The axial mixing and residence time of biomass particles in a horizontal sitrred bed reactor[J]. Acta energiae solaris sinica, 2018, 39(3): 844-849.
[3] 耿凡, 徐大勇, 袁竹林, 等. 滚筒干燥器中杆状颗粒混合特性的三维数值模拟[J]. 东南大学学报(自然科学版), 2008, 38(1): 116-122.
GENG F, XU D Y, YUAN Z L, et al.Three dimensional numerical simulation of mixing characteristics of slender particles in rotary dryer[J]. Journal of Southeast University (natural science edition), 2008, 38(1): 116-122.
[4] GENG F, CHAI H L, MA L, et al.Simulation of dynamic transport of flexible ribbon particles in a rotary dryer[J]. Powder technology, 2016, 297: 115-125.
[5] 戚华彪, 徐骥, 宋文立, 等. 螺旋输送器中颗粒混合过程的模拟[J]. 化工学报, 2018, 69(1): 371-380.
QI H B, XU J, SONG W L, et al.Simulation on mixing granular materials in screw conveyor[J]. CIESC journal, 2018, 69(1): 371-380.
[6] 刘攀笏, 马莉, 曾德望, 等. 基于EDEM的双螺旋反应器内物料运动与混合特性研究[J]. 太阳能学报, 2022, 43(10): 343-349.
LIU P H, MA L, ZENG D W, et al.Study on motion and mixing characteristics of material in twin-screw reactor based on EDEM[J]. Acta energiae solaris sinica, 2022, 43(10): 343-349.
[7] 荣文杰, 瞿林涛, 李嘉钰, 等. 滚筒内三元颗粒混合的离散元模拟研究[J]. 材料与冶金学报, 2023, 22(6): 602-608.
RONG W J, QU L T, LI J Y, et al.Discrete element simulation of ternary particle mixing in a rotating drum[J]. Journal of materials and metallurgy, 2023, 22(6): 602-608.
[8] LI D, XU X, CHEN J H, et al.Numerical study on the effect of drum on the flow behavior of binary-size particles in rotating drums[J]. Powder technology, 2021, 386: 108-119.
[9] JAIN A, EVRARD F, VAN WACHEM B.The effect of side walls on particles mixing in rotating drums[J]. Particuology, 2023, 72: 112-121.
[10] XU G G, ZHANG Y, YANG X G, et al.Effect of drum structure on particle mixing behavior based on DEM method[J]. Particuology, 2023, 74: 74-91.
[11] XIAO X W, LI Y Y, PENG R T, et al.Parameter calibration and mixing uniformity of irregular gravel materials in a rotating drum[J]. Powder technology, 2023, 414: 118074.
[12] CUNDALL P A, STRACK O D L. A discrete numerical model for granular assemblies[J]. Géotechnique, 1979, 29(1): 47-65.
[13] POTYONDY D O, CUNDALL P A.A bonded-particle model for rock[J]. International journal of rock mechanics and mining sciences, 2004, 41(8): 1329-1364.
[14] NASSAUER B, KUNA M.Contact forces of polyhedral particles in discrete element method[J]. Granular matter, 2013, 15(3): 349-355.
[15] HUANG A N, CHENG T H, HSU W Y, et al.DEM study of particle segregation in a rotating drum with internal diameter variations[J]. Powder technology, 2021, 378: 430-440.
[16] MINDLIN R D, DERESIEWICZ H.Elastic spheres in contact under varying oblique forces[J]. Journal of applied mechanics, 1953, 20(3): 327-344.
[17] AI J, CHEN J F, ROTTER J M, et al.Assessment of rolling resistance models in discrete element simulations[J]. Powder technology, 2011, 206(3): 269-282.
[18] JIN X, WANG S, SHEN Y S.DEM study of mixing behaviours of cohesive particles in a U-shaped ribbon mixer[J]. Powder technology, 2022, 399: 117097.
[19] 朱立平, 袁竹林, 闫亚明, 等. 基于离散单元法的丝状颗粒传热数学模型[J]. 化工学报, 2012, 63(7): 2051-2058.
ZHU L P, YUAN Z L, YAN Y M, et al.Model of heat transfer in filamentous granular materials based on discrete element method[J]. CIESC journal, 2012, 63(7): 2051-2058.
[20] 朱立平. 丝状颗粒传热传质特性的研究[D]. 南京: 东南大学, 2014.
ZHU L P.Study on heat and mass transfer characteristics of filamentous particles[D]. Nanjing: Southeast University, 2014.
[21] LIU X Y, ZHANG C Y, ZHAN J S.Quantitative comparison of image analysis methods for particle mixing in rotary drums[J]. Powder technology, 2015, 282: 32-36.
[22] CHOU S H, SONG Y L, HSIAU S S.A study of the mixing index in solid particles[J]. KONA powder and particle journal, 2017, 34: 275-281.
[23] JIN X, WANG S, SHEN Y S.Effects of operating conditions and particle properties on mixing performance in an industrial-scale U-shape ribbon mixer[J]. Powder technology, 2022, 411: 117933.
[24] LONG J C, WANG C, ZHU J Z, et al.Discrete element simulation for mixing performances and power consumption in a twin-blade planetary mixer with non-cohesive particles[J]. Advanced powder technology, 2022, 33(2): 103437.