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Title	An Engineering Model for Pulverized Fuel Combustion Stability
Creator	Stickler, D.; Gannon, R.; Young, L.; Annamalai, K.
Publisher	Digitized by J. Willard Marriott Library, University of Utah
Date	1983
Spatial Coverage	Akron, Ohio
Abstract	A simple model is developed for relating fuel volatile release to flame stability in a suspension-type industrial burner fired with pulverized coal. Convective transport and mixing processes are represented by assigned mass flows and time scales, based upon global flow field characteristics. This can adequately represent controlling parameters, while avoiding the computational issues of a priori prediction of complex viscous flows. Particle thermokinetic phenomena are treated in detail. The model allows the investigation of the effects of such burner design parameters as physical size, fuel throughput, wall radiation, mixing time scales and air injection sequence. Operating parameters including particle size distribution and volatile yield behavior and heating value can be explored in detail, as a means of assessing fuel interchange, for example. The proportioning of primary and secondary air streams, air preheat, and oxygen enrichment can also be explored using this approach to flame stability modeling.
Type	Text
Format	application/pdf
Language	eng
Rights	This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications	Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician	Cliodhna Davis
ARK	ark:/87278/s6mg7s20
Setname	uu_afrc
ID	460
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6mg7s20

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Title	Page 19
Format	application/pdf
OCR Text	Show swirl and air pressure drop, and coal size distribution. Also, the relationship of primary air/coal loading, size distribution, and secondary air mixing on flame stability suggests that an optimum primary stream loading exists. This model has also been used to explore the use of such capabilities as increased air preheat, oxygen enrichment, fuel particle size control, and burner flow field design to provide stable combustion of such fuels as anthracite and wood waste. It appears to be capable of providing a reasonable description of the interaction of the key parameters controlling pulverized fuel combustion stability, and a basis both for data correlation and engineering development decisions with operating hardware. -19- z i A V C O E V E R E TT
Setname	uu_afrc
ID	457
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6mg7s20/457