Slagging properties of coals and allowance for them in the analysis of the possibility of using out-of-design fuel |
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Authors: | A N Alekhnovich N V Artem’eva V V Bogomolov |
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Affiliation: | (1) Department of “UralVTI-Chelyabénergoset’proekt”, “Engineering Center for the Ural Power Industry” Company, Chelyabinsk, Russia |
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Abstract: | It is shown that out-of-design coal should be used only after computational analysis of slagging of the boiler. The use of
ash fusibility as a criterion for the analysis should be avoided because this property does not reflect the slagging properties
of coal to an acceptable degree. Parameters characterizing the properties more appropriately are presented. It is shown that
slagging of an actual furnace depends on many factors and the condition that “the thermal stresses should be lower than the
limiting value” is insufficient. An algorithm for the analysis is suggested on the basis of the slagging conditions arising
upon transition from one kind of fuel to another with allowance for the actual slagging situation.
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Translated from élektricheskie Stantsii, No. 3, March 2006, pp. 18–23. |
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Keywords: | out-of-design fuel mixture of coals joint firing mineral part of coal internal and external zones slagging of a boiler fouling based on active alkali strength properties of deposits |
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