THERMAL SCIENCE
International Scientific Journal
A NUMERICAL MODEL FOR CHEMICAL REACTION ON SLAG LAYER SURFACE AND SLAG LAYER BEHAVIOR IN ENTRAINED-FLOW GASIFIER
ABSTRACT
The paper concerns with slag layer accumulation, chemical reaction on slag layer surface, and slag layer flow, heat and mass transfer on the wall of entrained-flow coal gasifier. A slag layer model is developed to simulate slag layer behaviors in the coal gasifier. This 3-D model can predict temperature, slag particle disposition rate, disposition particle composition, and syngas distribution in the gasifier hearth. The model is used to evaluate the effects of O2/coal ratio on slag layer behaviors.
KEYWORDS
PAPER SUBMITTED: 2013-01-18
PAPER REVISED: 2013-04-26
PAPER ACCEPTED: 2013-05-18
PUBLISHED ONLINE: 2013-12-28
THERMAL SCIENCE YEAR
2013, VOLUME
17, ISSUE
Issue 5, PAGES [1389 - 1394]
- Reid, W. T., Cohen, P., The Flow Characteristics of Coal-Ash Slags in the Solidification Range, Trans. ASME, 66 (1944), pp. 685-690
- Seggiani, M., Modeling and Simulation of Time Varying Slag Flow in a Prenflo Entrained-Flow Gasifier, Fuel, 77 (1998), 14, pp. 1611-1621
- Benyon, P., et al., Engineering Modeling of High Pressure and Temperature Entrained-Flow Gasifiers, Japan-Austrialia Joint Technical Meeting of Coal, Fukuoka, Japan, 2000
- Benyon, P. J., Computational Modeling of Entrained Flow Slagging Gasifiers, Ph. D. thesis, University of Sydney, Sydney, Australia, 2002
- Zhou, J. H., et al., Numerical Simulation for Pulverized Coal Gasifier' Heating Nozzle and Slag Building Model, Proceedings, of CSEE, 27 (2007), 26, pp. 23-29
- Walsh, P. M., et al., Deposition of Bituminous Coal Ash on an Isolated Heat Ex-Changer Tube: Effects of coal Properties on Deposit Growth, Progress in Energy and Combustion Science, 4 (1990), 16, pp. 327-346
- Chen, C. X., et al., Numerical Simulation of Entrained Flow Coal Gasifiers, Part I: Modeling of Coal Gasification in an Entrained Flow Gasifier, Chemical Engineering Science, 55 (2000), 18, pp. 3861- 3874
- Hurt, R. H., Calo, J. M.. Semi-Global Intrinsic Kinetics for Char Combustion Modeling, Combustion and Flame, 125 (2001), 3, pp. 1138-1149
- Liu, G. S., Niksa, S., Coal Conversion Submodels for Design Applications at Elevated Pressures, Part II. Char Gasification, Progress in Energy and Combustion Science, 30 (2004), 6, pp. 679-717