Gas Fired Fluidized Beds


Investigations, both experimental and theoretical, have been made of gas combustion in fluidized beds. A mathematical model has been developed which gives a qualitative estimation of the bed temperature profiles in the axial direction. The concept of Effective Thermal Conductivity is discussed, and bed conductivities are re-defined bearing in mind the contribution of particle recirculation. Experiments have been performed with particle sizes ranging from 0.6 mm to 1.4 mm diameter. Results are presented for the effect of particle size, bed height and throughput on the bed behaviour. Two distributor plates have been used: mild steel and refractory. Comparisons are made between the two. Stability of combustion has been studied, and two mechanisms have been observed by means of which a bed becomes unstable. Chemical analysis of the combustion products has shown that even with shallow beds (5 cm deep), CO emissions are very small with excess air levels of not less than five percent.

Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
Additional Information: Copyright © Christopher Roger Westwood, 1975. Christopher Roger Westwood asserts his moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately.
Institution: Aston University
Last Modified: 28 Jun 2024 07:09
Date Deposited: 11 Jan 2011 13:26
Completed Date: 1975-03
Authors: Westwood, Christopher Roger

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