Modeling coal-fired cyclone combustors

✍ Scribed by F. Boysan; R. Weber; J. Swithenbank; C.J. Lawn

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 770 KB
• Volume: 63
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(86)90112-4

✦ Synopsis

A mathematical model based on the finite-difference solution of momentum, enthalpy, and species conservation equations has been constructed to describe the process of coal combustion in cyclone furnaces. Coal particles are tracked through the flow and the evolution and combustion of volatiles calculated. Most of the char then burns on the walls of the chamber, while held in a molten ash layer, at a rate principally determined by the rate of diffusion of oxygen. The predictions of the model are compared with experimental data obtained in the late 1950s at the British Coal Utilization Research Association on a small experimental combustor. Flow and heat transfer data are closely predicted; comparison with the combustion efficiency data cannot be rigorous but no major inconsistencies emerge.