Combustion and Fouling Characteristics of Two Canadian Lignites

[+] Author and Article Information
F. D. Friedrich, G. K. Lee, E. R. Mitchell

Canadian Combustion Research Laboratory, Fuels Research Center, Mines Branch, Department of Energy, Mines, and Resources, Ottawa, Canada

J. Eng. Power 94(2), 127-132 (Apr 01, 1972) (6 pages) doi:10.1115/1.3445643 History: Received August 03, 1971; Online July 14, 2010


The report describes combustion tests with Bienfait lignite from Saskatchewan and Onakawana lignite from James Bay. They were burned in a pilot-scale, pulverized-fired boiler primarily to study combustion performance and fireside fouling tendencies under slag-tap conditions. Flame stability and complete combustion were readily obtained, although satisfactory slag tapping was not achieved with either fuel. Fireside ash deposit samples, representing each fuel, were collected from various parts of the boiler and subjected to exhaustive analyses. The results indicate that, when burning Bienfait lignite, selective deposition of ash constituents takes place, resulting in a eutectic composition downstream of the furnace exit. In the case of Onakawana lignite, selective ash deposition did not occur. Deposit analyses, fusion temperatures, and enrichment ratios are given for both fuels.

Copyright © 1972 by ASME
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