Intra- and inter-unit variation in fly ash petrography: Examples from a western Kentucky power station

Conference · Thu Dec 31 04:00:00 EST 1998

OSTI ID:349055

Hower, J C; Rathbone, R F ^[1]; Goodman, J ^[2]

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1. Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research
2. Prestonburg High School, KY (United States)

Fly ash was collected from eight mechanical and ten baghouse hoppers at each of twin 150-MW wall-fired units in a western Kentucky power station. The fuel burned at that time was a blend of low-sulfur, high volatile bituminous Central Appalachian coals. The baghouse ash showed less variation between units than the mechanical units. The coarser mechanical fly ash showed significant differences in the amount of total carbon and in the ratio of isotropic coke to both total carbons and total coke; the latter excluding inertinite and other unburned, uncoked coal. There was no significant variation in ratios of inorganic fly ash constituents. The inter-unit differences in the amount and forms of mechanical fly ash carbon appear to be related to differences in pulverizer efficiency, leading to greater amounts of coarse coal, therefore unburned carbon, in one of the units.

• OSTI ID: 349055
• Report Number(s): CONF-980985--; ISBN 1-890977-15-2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
BITUMINOUS COAL
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
FLY ASH
FOSSIL-FUEL POWER PLANTS
POLLUTION CONTROL EQUIPMENT