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Low impact velocity wastage in FBCs : experimental results and comparison between abrasion and erosion theories

Chacón-Nava, José G. and Almeraya-Calderón, F. and Martínez-Villafañe, Alberto and Stack, Margaret (2012) Low impact velocity wastage in FBCs : experimental results and comparison between abrasion and erosion theories. In: Abrasion resistance of materials. In-Tech Open Publishers, Croatia. ISBN 9799533070369

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Abstract

The use of technologies related to combustion of coal in fluidized bed combustors (FBCs) present attractive advantages over conventional pulverized coal units. Some of the outstanding characteristics are: excellent heat transfer, low emission of contaminants, good combustion efficiencies and good fuel flexibility. However, FBC units can suffer materials deterioration due to particle interaction of solid particles with the heat transfer tubes immersed on the bed (Hou, 2004, Oka, 2004, Rademarkers et al., 1990). Among other issues, some of the most important factors believed to cause wear problems are: the motion of slowly but relatively coarse particles, particles loaded onto the surface by other particles, erosion by relatively fast-moving particles associated with bubbles, and abrasion by blocks of particles thrown into the surface by bubble collapse. Thus, erosion or abrasion processes can occur by a variety of causes. For the case of particle movement against in-bed surfaces, it has been suggested that there is no difference in the ability to cause degradation between solid particle erosion and low stress three body abrasion, and distinctions between the two forms of wear should not to be made (Levy, 1987).

Item type: Book Section
ID code: 33567
Notes: Published online
Keywords: abrasion, erosion, fluidized bed combustors (FBCs), heat transfer, Mechanical engineering and machinery, Mechanical Engineering, Mechanics of Materials
Subjects: Technology > Mechanical engineering and machinery
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Depositing user: Pure Administrator
Date Deposited: 22 Sep 2011 09:08
Last modified: 21 May 2015 19:28
Related URLs:
URI: http://strathprints.strath.ac.uk/id/eprint/33567

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