回转干馏炉内颗粒间传热特性的数值模拟

发布时间：2018-05-19 09:55

本文选题：回转干馏炉 + 离散元方法　；参考：《化工学报》2017年11期

【摘要】：将离散元方法与颗粒热传导模型相结合,研究了页岩灰颗粒与油页岩颗粒在回转干馏炉内的混合传热过程,采用混合指数、颗粒平均温度和温度标准偏差作为评价混合传热效果的指标,分析了填充率、炉体转速、油页岩粒径及抄板形式对颗粒间混合传热特性的影响规律。结果表明,炉体转速和油页岩粒径是影响颗粒混合传热效果的主要因素,而填充率和抄板形式对混合传热效果的影响相对较小。当炉内未设抄板时,随着填充率和油页岩粒径的增大,颗粒间分层现象使混合传热效果变差,而随炉体转速的提高传热效果呈现出先增强后减弱的趋势;设抄板时,抄板形式对炉内颗粒间的混合起到不同程度的扰动作用,从而使传热效果得到显著改善。
[Abstract]:Combining the discrete element method with the particle heat conduction model, the mixing heat transfer process of shale ash particles and oil shale particles in a rotary retorting furnace is studied. The mixing index, the average temperature of the particles and the standard deviation of the temperature are used as the indexes to evaluate the effect of the mixed heat transfer. The filling rate, the furnace body speed, the oil shale particle diameter and the form of the copy plate are analyzed. It is shown that the speed of the furnace body and the particle size of the oil shale are the main factors affecting the mixing heat transfer effect of the particles, and the influence of the filling rate and the form of the sheet on the mixing heat transfer effect is relatively small. The effect of the mixing heat transfer is worse, and the heat transfer effect increases first and then decreases with the increase of the speed of the furnace. When the sheet is set, the form of the sheet is disturbed to a different degree of mixing between the particles in the furnace, thus the effect of heat transfer is greatly improved.
【作者单位】：东北电力大学油页岩综合利用教育部工程研究中心;
【基金】：国家自然科学基金项目(51676032,51276034) 教育部长江学者和创新团队发展计划项目(IRT13052)~~
【分类号】：TE662.5

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