柱状生物质颗粒在回转干馏炉中的运动及导热特性

doi:10.16085/j.issn.1000-6613.2017-0333

化工进展 ›› 2017, Vol. 36 ›› Issue (11): 3993-3999.DOI: 10.16085/j.issn.1000-6613.2017-0333

柱状生物质颗粒在回转干馏炉中的运动及导热特性

张立栋, 韦庆文, 秦宏, 王擎

东北电力大学油页岩综合利用教育部工程研究中心, 吉林吉林 132012

收稿日期:2017-03-01 修回日期:2017-03-20 出版日期:2017-11-05 发布日期:2017-11-05
通讯作者: 张立栋(1980-),男,博士,副教授,主要研究方向为油页岩综合利用及回转装置混合与分离。
作者简介:张立栋(1980-),男,博士,副教授,主要研究方向为油页岩综合利用及回转装置混合与分离。E-mail:nedu1015@aliyun.com。
基金资助:
教育部长江学者和创新团队发展计划（IRT13052）、吉林省自然科学基金（20150101033JC）、吉林市科技计划（201464044）及吉教科合字（2015-237）项目。

Motion and heat conduction in rotary retorting filled with cylindrical biomass particles

ZHANG Lidong, WEI Qingwen, QIN Hong, WANG Qing

Engineering Research Center of Ministry of Education for Comprehensive Utilization of Oil Shale, Northeast Electric Power University, Jilin 132012, Jilin, China

Received:2017-03-01 Revised:2017-03-20 Online:2017-11-05 Published:2017-11-05

摘要/Abstract

摘要： 为探究柱状生物质颗粒在固体热载体（钢球颗粒）回转干馏炉（回转炉）内的运动及导热特性，采用离散单元法模拟了柱状生物质颗粒和钢球颗粒在回转炉中的运动和导热；分析了转速和生物质颗粒数量（钢球颗粒数量固定）对颗粒运动和导热的影响；探讨了颗粒在回转炉中的分布规律；用生物质颗粒的平均温度和温度标准差来评价钢球颗粒对生物质颗粒的加热速率和生物质颗粒温度分布的均匀程度。结果表明：在本文设定的工况下，颗粒在回转炉中可以分成3个区域，即左侧的单层钢球颗粒区、中间的颗粒混合区和右侧的生物质颗粒堆积区；单层钢球颗粒区的不稳定因素（不稳定区、不稳定线、不稳定空穴）诱发了此区的周期性塌落；颗粒的运动模式为阶梯模式；随着转速的升高，钢球颗粒的加热速率升高。在前20s，相较5r/min和25r/min，转速为15r/min时的生物质颗粒温度分布均匀性最差。

关键词: 柱状生物质颗粒, 离散单元法, 运动, 导热

Abstract: In order to understand the characteristics of motion and heat conduction of biomass particles and solid thermal carriers(steel particles) in rotary retorting,the motion and heat conduction of biomass particles and steel particles in rotary retorting were simulated using discrete element methods. The effect of the rotational speed and quantity of biomass particles on particle motion and heat conduction was analyzed. The distribution of particles in the rotary retorting was investigated. The mean temperature of biomass particles and the temperature standard deviation of biomass particles were used to evaluate the heating rate of steel particles and the uniformity of biomass particles'temperature. The result showed that particles in the rotary retorting was divided into three regions:the monolayer steel particles region in the left of the particles region,the mixing region of biomass particles and steel particles in the middle of the particles region,and the accumulating region of biomass particles in the right of the particles region. The unstable factors(unstable regions,unstable lines and unstable holes)led to the periodic collapse of the monolayer steel particles region. The motion mode was slumping in all six situations. With the increasing of rotational speed,the heating rate of steel particles was increased.When the rotational speed was 15r/min,the uniformity of biomass particles'temperature was worst in the first 20s comparing to the rotational speed of 5r/min and 25r/min.

Key words: cylindrical biomass particles, discrete element method, motion, heat conduction

中图分类号:

TQ051

张立栋, 韦庆文, 秦宏, 王擎. 柱状生物质颗粒在回转干馏炉中的运动及导热特性[J]. 化工进展, 2017, 36(11): 3993-3999.

ZHANG Lidong, WEI Qingwen, QIN Hong, WANG Qing. Motion and heat conduction in rotary retorting filled with cylindrical biomass particles[J]. Chemical Industry and Engineering Progress, 2017, 36(11): 3993-3999.

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柱状生物质颗粒在回转干馏炉中的运动及导热特性

Motion and heat conduction in rotary retorting filled with cylindrical biomass particles

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