Table of Contents Author Guidelines Submit a Manuscript
International Journal of Chemical Engineering
Volume 2012 (2012), Article ID 171838, 8 pages
http://dx.doi.org/10.1155/2012/171838
Research Article

Design Mixers to Minimize Effects of Erosion and Corrosion Erosion

1Mixer Engineering Co., 2673 Stonebridge Drive, Troy, OH 45373, USA
2Chemineer, Inc., 5870 Poe Avenue, Dayton, OH 45414, USA
3Department of Chemical & Materials Engineering, University of Dayton, 300 College Park, Dayton, OH 45469-0246, USA

Received 29 September 2011; Accepted 8 January 2012

Academic Editor: Shunsuke Hashimoto

Copyright © 2012 Julian Fasano et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A thorough review of the major parameters that affect solid-liquid slurry wear on impellers and techniques for minimizing wear is presented. These major parameters include (i) chemical environment, (ii) hardness of solids, (iii) density of solids, (iv) percent solids, (v) shape of solids, (vi) fluid regime (turbulent, transitional, or laminar), (vii) hardness of the mixer's wetted parts, (viii) hydraulic efficiency of the impeller (kinetic energy dissipation rates near the impeller blades), (ix) impact velocity, and (x) impact frequency. Techniques for minimizing the wear on impellers cover the choice of impeller, size and speed of the impeller, alloy selection, and surface coating or coverings. An example is provided as well as an assessment of the approximate life improvement.