Prediction of ash deposition in pulverized coal combustion systems

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:305694

Lee, F C.C.; Riley, G S ^[1]; Lockwood, F C ^[2]

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1. National Power PLC, Swindon (United Kingdom)
2. Imperial Coll. of Science, Technology and Medicine, London (United Kingdom). Dept. of Mechanical Engineering

A predictive scheme based on CCSEM flyash data and Computational Fluid Dynamics (CFD) has been developed to study the slagging propensity of coals. The model has been applied to predict the deposition potential of three UK coals; Bentinck, Daw Mill and Silverdale, in a pilot scale single burner ash deposition test facility and an utility size multi-burner front wall-fired furnace. The project is part of a collaborative research program sponsored by the UK Department of Trade and Industry and involved various industrial organizations and universities. The objective of the project is to understand the fundamental aspects of slagging in pulverized coal-fired combustion systems. This paper is a sequel to the poster paper entitled: The Prediction of Ash Deposition in a Coal Fired Axi-symmetric Furnace, presented in the last Engineering Foundation Conference. The present model predicts the relative slagging propensity of the three coals correctly. The predicted deposition patterns are also consistent with the observations. The results from the model indicate a preferential deposition of iron during the initial stage of ash deposition. The average compositions of the deposits become closer to that of the bulk ash when the accumulation of ash deposits is taken into account.

• Research Organization: Engineering Foundation, New York, NY (United States)
• OSTI ID: 305694
• Report Number(s): CONF-9507274--PROC.; ISBN 0-306-45376-2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADHESION
BITUMINOUS COAL
CHEMICAL COMPOSITION
COMBUSTION KINETICS
DEPOSITION
FLY ASH
FOULING
MATHEMATICAL MODELS
PULVERIZED FUELS
SLAGS