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浙江大学学报(工学版)
浙江大学学报(工学版)
化学工程     
多股进料搅拌釜停留时间分布的信息熵
王宇良,郑海俊,周业丰,黄正梁,王靖岱,阳永荣
浙江大学 化学工程联合国家重点实验室,化学工程与生物工程学系,浙江 杭州 310027
Information entropy of residence time distribution in stirred tank with multiple inlets
WANG Yu-liang, ZHENG Hai-jun, ZHOU Ye-feng, HUANG Zheng-liang, WANG Jing-dai, YANG Yong-rong
State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering,
Zhejiang University, Hangzhou 310027, China
 全文: PDF(1068 KB)  
摘要：

以具有4股进料和单股出料的搅拌釜为例,将信息熵理论用于分析停留时间的分布,用信息熵混合度来表征整个装置内的混合情况.当4股同时进料却只在一股加入示踪剂时,方差分析结果表明：底部进料的示踪剂在整个装置内混合良好,这与示踪剂主要分布在装置下部,未能在整个装置内实现良好混合的现象不符.通过信息熵分析,发现搅拌雷诺数越大、示踪剂进料位置离装置出口越远,则示踪剂混合情况越好.此外,按叠加规则计算得到的总停留时间分布曲线与实际值吻合良好,两者信息熵混合度的相对偏差小于2%,验证了叠加规则的正确性.可见,在多股进料条件下，将信息熵理论应用于停留时间分布的分析,比方差分析更能准确地反映流体的流动与混合情况.
关键词： 多股进料;  停留时间分布;  混合度;  信息熵;  搅拌釜    
Abstract:

Information entropy theory was used to analyze residence time distribution (RTD) in a stirred tank with four inlets and one outlet. The information entropy mixing degree  was applied to characterize the quality of mixing within the whole tested apparatus. When the tracer was injected in one of the four inlets, the variance analysis showed that the mixing of the tracer in the whole tank was perfect. The result was different from the experiment where the tracer mainly distributed at the bottom of the tank and didn’t have the best mixing performance. The information entropy analysis indicated that the mixing degree of the tracer was enhanced with the increase of Reynolds number and the distance between tracer inlet and product outlet. Furthermore, the overall RTD cures based on the superposition rule showed an excellent agreement with the experimental results. The relative deviation (RD) of information entropy mixing degree was less than 2%, which validatesd the superposition rule. In conclusion, information entropy theory is more suitable for analyzing RTD than variance analysis, reflecting the flow and mixing characteristics for flow system with multiple inlets more accurately．
Key words: multiple inlets    information entropy    mixing degree    residence time distribution    stirred tank
出版日期: 2015-04-12
:  TQ 027  
基金资助:

国家自然科学重点基金资助项目（21236007）；高等学校博士学科点专项科研基金资助项目（20130101110063）；国家“973”重点基础研究发展计划资助项目（2012CB720500）；浙江省自然科学基金青年基金资助项目（LQ13B060002）
通讯作者: 黄正梁, 男, 助理研究员     E-mail: huangzhengl@163.com
作者简介: 王宇良(1989-), 男,硕士生,从事化学反应工程研究.E-mail: yulia123@163.com
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引用本文:

王宇良,郑海俊,周业丰,黄正梁,王靖岱,阳永荣. 多股进料搅拌釜停留时间分布的信息熵[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2015.03.027.

WANG Yu-liang, ZHENG Hai-jun, ZHOU Ye-feng, HUANG Zheng-liang, WANG Jing-dai, YANG Yong-rong. Information entropy of residence time distribution in stirred tank with multiple inlets. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2015.03.027.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2015.03.027    或    http://www.zjujournals.com/xueshu/eng/CN/Y2015/V49/I3/590

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