| 粘性体系中微观混合实验研究 |
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| 引用本文： | 崔莎莎,李广赞,冯连芳,许忠斌,胡国华.粘性体系中微观混合实验研究[J].化学工程,2007,35(1):24-27. |
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| 作者姓名： | 崔莎莎 李广赞 冯连芳 许忠斌 胡国华 |
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| 作者单位： | 浙江大学,化学工程与生物工程学系,聚合反应工程国家重点实验室,浙江,杭州,310027;法国国家科学研究中心,化学工程科学实验室,法国,南锡,54001 |
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| 基金项目： | 国家重点基础研究发展计划项目(2001CB711203) |
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| 摘 要： | 体系粘度是影响微观混合质量的重要因素。文章在粘度为0.001—0.077 Pa.s的甘油-水溶液中采用碘化钾-碘酸钾平行竞争反应研究搅拌釜中粘性体系的微观混合状况,分析泛能式桨的混合能力。结果表明:随着体系粘度的增加,微观混合效果变差;搅拌转速增加,微观混合效果变好。粘性体系内微观混合质量受到“涡旋卷吸”与“分子扩散”的共同影响。低粘条件下,二叶平桨混合效果优于泛能式桨;粘度增大,单位体积功增大时泛能式桨微观混合效果优于二叶平桨。
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| 关 键 词： | 平行竞争反应 微观混合 粘性体系 泛能式桨 |
| 文章编号： | 1005-9954（2007）01-0024-04 |
Experimental study on micromixing process in viscous media |
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| CUI Sha-sha,LI Guang-zan,FENG Lian-fang,XU Zhong-bin,HU Guo-hua.Experimental study on micromixing process in viscous media[J].Chemical Engineering,2007,35(1):24-27. |
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| Authors: | CUI Sha-sha LI Guang-zan FENG Lian-fang XU Zhong-bin HU Guo-hua |
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| Affiliation: | 1. State Key Laboratory of Polymer Reaction Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang Province, China; 2. Laboratory of Chemical Engineering Sciences, CNRS-ENSIC-INPL 1 rue Grandville BP 451, 54001 Nancy, France |
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| Abstract: | The micromixing behavior in viscous media in tanks was studied by Iodide-Iodate reaction system in(glycerin)-water mixtures with viscosities from 0.001 Pa·s to 0.077 Pa·s and the micromixing capability of full-zone agitator was examined.The results indicate that micromixing condition becomes worse at higher viscosity and lower rotation speed of agitator and becomes better at higher rotation speed of agitator.The micromixing condition in viscous system is determined by both engulfment and molecular diffusion.In lower viscosity,the capability of(paddle) impeller is better than full-zone agitator.In higher viscosity and higher power dissipation rate per unit mass,micromixing ability of full-zone is better than paddle impeller. |
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| Keywords: | parallel reaction micromixing viscosity full-zone agitator |
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