50. Morphology and Reactivity of Bed Materials in PFBC Boiler at Different Loads

概要

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Bed materials in pressurized fluidized bed combustion (PFBC) at various combustion conditions were characterized by SEM and TGA to describe their morphology and reactivity. 270MW output conditions were found to keep bed material uniform, whereas 285MW output conditions produced sintered egg (SE), sintered grain (SG), and unburnt char (UC) among the bed materials. Normal fluidization of uniform bed materials was maintained at 270MW output level combustion. Poor fluidization at 285MW caused several types of adhering and agglomerating of bed materials in the boiler. Local heating during poor fluidization was suggested to cause the formation spherical melted particles through the melting which gather to form the flat surface of SE. Fine particles of aluminasilicate adhered to the melted surface to form porous surface.
一般社団法人日本エネルギー学会の論文
2001-11-13