Chapter 6. Mechanically Stirred Vessels

  1. Edward L. Paul3,
  2. Victor A. Atiemo-Obeng4,
  3. Suzanne M. Kresta5
  1. Ramesh R. Hemrajani1,
  2. Gary B. Tatterson2

Published Online: 30 JAN 2004

DOI: 10.1002/0471451452.ch6

Book Title

Handbook of Industrial Mixing: Science and Practice

Handbook of Industrial Mixing: Science and Practice

Additional Information

How to Cite

Hemrajani, R. R. and Tatterson, G. B. (2004) Mechanically Stirred Vessels, in Handbook of Industrial Mixing: Science and Practice (eds E. L. Paul, V. A. Atiemo-Obeng and S. M. Kresta), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/0471451452.ch6

Editor Information

  1. 3

    Merck & Co., Inc. (retired); 308 Brooklyn Boulevard, Sea Girt, NJ 08750, USA

  2. 4

    The Dow Chemical Company, Building 1776, Midland, MI 48674, USA

  3. 5

    Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada T6G 2G6

Author Information

  1. 1

    ExxonMobil Research and Engineering Company, Room 7A-2130, 3225 Gallows Road, Fairfax, VA 22037-0001, USA

  2. 2

    Department of Chemical Engineering, North Carolina A&T State University, Greensboro, NC 27282, USA

Publication History

  1. Published Online: 30 JAN 2004
  2. Published Print: 14 NOV 2003

ISBN Information

Print ISBN: 9780471269199

Online ISBN: 9780471451457

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CHAPTER TOOLS

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Keywords:

  • axial impeller;
  • radial impeller;
  • high shear impeller;
  • wall baffles;
  • pumping number;
  • power number;
  • laminar mixing;
  • turbulent mixing;
  • liquid blending;
  • solids suspension;
  • liquid–liquid emulsification;
  • gas–liquid dispersion

Summary

This chapter covers the full slate of mixer geometries used for mechanical agitation in vessels. These geometries include impeller types, baffle designs, tank shapes, feed nozzles, inserts for heat transfer etc. Guidelines are provided for selection and design of impellers and other components based on mixing requirements such as flow direction, shear levels, heat transfer, backmixing rate, homogeneity in the feed region etc. Specific mixing requirements are described for processes of liquid blending, solids suspension, liquid–liquid emulsification and gas dispersion. Unique impeller designs suitable for laminar mixing are also described. Important design characteristics of various impellers are provided which include pumping number and power number. Basic discussions on scale-up are also included.

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