柔性Rushton搅拌桨混合性能的实验研究

杨锋苓; 张翠勋; 李美婷

doi:10.11949/0438-1157.20190961

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柔性Rushton搅拌桨混合性能的实验研究

流体力学与传递现象 | 更新时间：2026-07-24

- 柔性Rushton搅拌桨混合性能的实验研究
- Experimental study on mixing characteristics of flexible-blade Rushton impeller
- 化工学报 2020年71卷第2期页码：626-632
- 作者机构：
  
  1. 山东大学机械工程学院，山东济南 250061
  2. 高效洁净机械制造教育部重点实验室(山东大学)，山东济南 250061
  3. 山东大学机械工程国家级实验教学示范中心，山东济南 250061
  4. 山东天力能源股份有限公司，山东济南 250100
- 作者简介：
  
  杨锋苓（1979—），男，博士，副教授， fly@sdu.edu.cn
- 基金信息：
  
  山东省重点研发计划项目(2016GGX103035;2017GGX70101)
- DOI：10.11949/0438-1157.20190961
  中图分类号： TQ 027
- 收稿：2019-08-21，
  
  修回：2019-12-25，
  
  网络首发：2020-08-14，
  
  纸质出版：2020-02-05
- 稿件说明：
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杨锋苓, 张翠勋, 李美婷. 柔性Rushton搅拌桨混合性能的实验研究[J]. 化工学报, 2020, 71(2): 626-632

YANG Fengling, ZHANG Cuixun, LI Meiting. Experimental study on mixing characteristics of flexible-blade Rushton impeller[J]. CIESC Journal, 2020, 71(2): 626-632
杨锋苓, 张翠勋, 李美婷. 柔性Rushton搅拌桨混合性能的实验研究[J]. 化工学报, 2020, 71(2): 626-632 DOI： 10.11949/0438-1157.20190961.

YANG Fengling, ZHANG Cuixun, LI Meiting. Experimental study on mixing characteristics of flexible-blade Rushton impeller[J]. CIESC Journal, 2020, 71(2): 626-632 DOI： 10.11949/0438-1157.20190961.

摘要

提高混合效率是流体搅拌混合领域的重点研究内容之一。几十年来，人们在开发新型搅拌桨及研发流体混合新技术方面做了大量工作。基于刚性Rushton桨，开发了一种柔性叶片Rushton搅拌桨，并以罗丹明6G为荧光剂，采用平面激光诱导荧光法对介质为水时该桨在湍流状态下的混合性能进行了实验测试研究。结果发现，标定实验结果表明，荧光剂强度与浓度呈线性关系，可以此为基准衡量同等实验条件下的宏观混合时间。荧光剂的扩散情况表明，与刚性桨相比，柔性桨具有更好的混合性能，尤其在混合的初始阶段，混合均匀程度及混合速度均有一定的优势。与刚性桨混合时间的对比表明，柔性桨的宏观混合时间较短，有助于提高流体混合效率。研究结果为该桨的工业应用奠定了基础。

Abstract

Rapid mixing is the key factor to efficient operation of many industrial devices involving fluid flow. During the past several decades

extensive contributions have been made to improve the mixing effect and efficiency either by modifying and developing new types of impellers

or by employing and developing new fluid mixing techniques. In this paper

the turbulent mixing characteristics of the flexible-blade Rushton impeller developed by ourselves were experimentally studied by the planar laser induced fluorescence (PLIF) technique. Roddinmin 6G was used as fluorescer. The agitated fluid was water. Result of the calibration experiment shows that the fluorescer luminosities are linear with their concentration

which can be used as a benchmark to measure the mixing time under the same experimental conditions. Diffusion processes of fluorescer show that flexible-blade Rushton impeller has better mixing performance than the standard Rushton impeller. It can improve the mixing uniformity and increase the mixing speed

especially at the initial stage of the mixing process. By comparison with standard Rushton impeller

it was found that mixing time of flexible-blade Rushton impeller is shorter

which is helpful to improve the fluid mixing efficiency. Results of this work lay a solid foundation for the industrial application of this impeller.

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references

Stankiewicz A I , Moulijn J A . Process intensification: transforming chemical engineering [J ] . Chem. Eng. Prog ., 2000 , 96 ( 1 ): 22 - 34 .

Boodhoo K , Harvey A . Process intensification: an overview of principles and practice //Process Intensification for Green Chemistry: Engineering Solutions for Sustainable Chemical Processing[M ] . New Jersey: John Wiley & Sons , Inc ., 2013 ： 1 - 31 .

Stankiewicz A , van Gerven T , Stefanidis G . The Fundamentals of Process Intensification [M ] . New Jersey : John Wiley & Sons , 2019 .

Rothstein D , Henry E , Gollub J P . Persistent patterns in transient chaotic fluid mixing [J ] . Nature , 1999 , 401 : 770 - 772 .

Alvarez-Hernández M M , Shinbrot T , Zalc J , et al . Practical chaotic mixing [J ] . Chem. Eng. Sci ., 2002 , 57 ( 17 ): 3749 - 3753 .

Solomon T H , Mezić I . Uniform resonant chaotic mixing in fluid flows [J ] . Nature , 2003 , 425 : 376 - 380 .

Lamberto D J , Muzzio F J , Swanson P D , et al . Using time-dependent RPM to enhance mixing in stirred vessels [J ] . Chem. Eng. Sci ., 1996 , 51 ( 5 ): 733 - 741 .

Alvarez M M , Arratia P E , Muzzio F J . Laminar mixing in eccentric stirred tank systems [J ] . Can . J. Chem. Eng ., 2002 , 80 ( 4 ): 546 - 557 .

Wang S , Wu J , Ohmura N . Inclined-shaft agitation for improved viscous mixing [J ] . Ind. Eng. Chem. Res ., 2013 , 52 ( 33 ): 11741 - 11751 .

Komoda Y , Inoue Y , Hirata Y . Mixing performance by reciprocating disk in cylindrical vessel [J ] . J. Chem. Eng. Jpn ., 2000 , 33 ( 6 ): 879 - 885 .

Bakker A , Ohio D . Impeller assembly with asymmetric concave blades : US 5791780 [P ] . 1998-08-11 .

Ameur H . Some modifications in the Scaba 6SRGT impeller to enhance the mixing characteristics of Hershel–Bulkley fluids [J ] . Food Bioprod . Process ., 2019 , 117 : 302 - 309 .

张国娟 , 闵健 , 高正明 , 等 . 翼型桨搅拌槽内混合过程的数值模拟 [J ] . 高校化学工程学报 , 2005 , 19 ( 2 ): 169 - 174 .

Zhang G J , Min J , Gao Z M , et al . Numerical simulation of mixing process in a stirred tank with hydrofoil impeller [J ] . J. Chem. Eng. Chin. Univ ., 2005 , 19 ( 2 ): 169 - 174 .

Nester R G . High-speed flexible-blade stirrer and stirrer seal for high-vacuum use [J ] . Rev. Sci. Instrum ., 1956 , 27 ( 12 ): 1080 - 1081 .

Young R N , Ga A . Method and apparatus for aeration using flexible blade impeller : US 5993158 [P ] . 1999-11-30 .

Bullock L S ,Schober S D, Hansen T L . Flexible agitator fins USD 477697 : [P ] . 2003-07-22 .

刘作华 , 郑雄攀, 朱俊, 等 . 一种刚柔组合的搅拌桨 : 201410017550.4 [P ] . 2014-04-16 .

Liu Z H , Zheng X P, Zhu J et al . A kind of rigid-flexible combination impeller : 201410017550.4 [P ] . 2014-04-16 .

刘作华 , 刘培乔 , 谷德银 , 等 . 一种强化流体混沌混合的刚柔组合式搅拌桨 : 201680001618.7 [P ] . 2018-07-31 .

Liu Z H , Liu P Q , Gu D Y , et al . A kind of rigid-flexible combination impeller used for intensifying fluid chaotic mixing : 201680001618.7 [P ] . 2018-07-31 .

Ramsay J , Simmons M J H , Ingram A , et al . Mixing of Newtonian and viscoelastic fluids using “butterfly” impellers [J ] . Chem. Eng. Sci ., 2016 , 139 : 125 - 141 .

Mule G M , Lohia R , Kulkarni A A . Effect of number of branches on the performance of fractal impeller in a stirred tank: mixing and hydrodynamics [J ] . Chem. Eng. Res. Des ., 2016 , 108 : 164 - 175 .

Ghobadi N , Ogino C , Ogawa T , et al . Using a flexible shaft agitator to enhance the rheology of a complex fungal fermentation culture [J ] . Bioprocess. Biosyst. Eng ., 2016 , 39 ( 11 ): 1793 - 1801 .

Ogawa T , Yamamoto M . Frictionless clean reactor “SWINGSTIR” [EB/OL ] . http://www.kobelco-eco.co.jp/product/process/mixing/swingstir/mix_swing_000.html http://www.kobelco-eco.co.jp/product/process/mixing/swingstir/mix_swing_000.html .

Saito F , Nienow A W , Chatwin S , et al . Power, gas dispersion and homogenisation characteristics of Scaba SRGT and Rushton turbine impellers [J ] . J. Chem. Eng. Jpn ., 1992 , 25 ( 3 ): 281 - 287 .

Roman R V , Tudose R Z . Studies on transfer processes in mixing vessels: hydrodynamic of the modified Rushton turbine agitators in gas-liquid dispersions [J ] . Chem. Eng. J ., 1996 , 61 ( 2 ): 83 - 93 .

Patwardhan A W , Joshi J B . Design of gas-inducing reactors [J ] . Ind. Eng. Chem. Res ., 1999 , 38 ( 1 ): 49 - 80 .

Xia J Y , Wang Y H , Zhang S L , et al . Fluid dynamics investigation of variant impeller combinations by simulation and fermentation experiment [J ] . Biochem. Eng. J ., 2009 , 43 ( 3 ): 252 - 260 .

Bielka I , Cudak M , Karcz J . Local heat transfer process for gas-liquid system in a wall region of an agitated vessel equipped with the system of CD 6-RT impellers [J ] . Ind. Eng. Chem. Res ., 2014 , 53 ( 42 ): 16539 - 16549 .

Zheng Z , Sun D , Li J , et al . Improving oxygen transfer efficiency by developing a novel energy-saving impeller [J ] . Chem. Eng. Res. Des ., 2018 , 130 : 199 - 207 .

Yianneskis M , Popiolek Z , Whitelaw J H . An experimental study of the steady and unsteady flow characteristics of stirred reactors [J ] . J. Fluid Mech ., 1987 , 175 : 537 - 555 .

Escudié R , Bouyer D , Liné A . Characterization of trailing vortices generated by a Rushton turbine [J ] . AIChE J ., 2004 , 50 ( 1 ): 75 - 86 .

Kadic E , Heindel T J . An Introduction to Bioreactor Hydrodynamics and Gas-Liquid Mass Transfer [M ] . New Jersey : John Wiley & Sons , Inc ., 2014 , 69 - 88 .

Vasconcelos J M T , Orvalho S C P , Rodrigues A M A F , et al . Effect of blade shape on the performance of six-bladed disk turbine impellers [J ] . Ind . Eng . Chem . Res ., 2000 , 39 ( 1 ): 203 - 213 .

Liu Z H , Zheng X P , Liu D , et al . Enhancement of liquid-liquid mixing in a mixer-settler by a double rigid-flexible combination impeller [J ] . Chem. Eng. Process ., 2014 , 86 : 69 - 77 .

朱俊 , 周政霖 , 刘作华 , 等 . 刚柔组合搅拌桨强化流体混合的流固耦合行为 [J ] . 化工学报 , 2015 , 66 ( 10 ): 3849 - 3856 .

Zhu J , Zhou Z L , Liu Z H , et al . Fluid-structure interaction in liquid mixing intensified by flexible-rigid impeller [J ] . CIESC Journal , 2015 , 66 ( 10 ): 3849 - 3856 .

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