Summary
Laboratory measurements of coal rapid pyrolysis char yield and char reactivity, together with a simple model of pulverized coal combustion, have been used to predict coal combustion efficiency in utility boilers. Several bituminous coals were tested and found to burn out to different extents under boiler conditions. Burnout performance did not correlate well with proximate volatile matter content.
Burnout predictions agreed with measured power station data for three coals. Model calculations showed that furnace residence time distribution and excess air are parameters strongly affecting burnout. Grind fineness (% w < 75 micron) has a potentially large affect on combustion efficiency but the extent to which this is realized in practice depends on the mill classification characteristics.
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References
Kobayashi H., Howard J.B., Sarofim A.F. Coal Devolatilization at High Temperatures. 16th Symposium (Int.) on Combustion. The Combustion Institute. p411 (1975)
Howard J.B. Fundamentals of Coal Pyrolysis and Hydropyrolysis. Chemistry of Coal Utilization. 2nd Supplementary Volume. Wiley Interscience. (1981)
Essenhigh R.H. Fundamentals of Coal Combustion. Chemistry of Coal Utilization. 2nd Supplementary Volume. Wiley Interscience. (1981)
Morley C., Jones R.B. Entrained Flow Reactor and Image Analysis Study of Maceral Effects in Coal Char Oxidation, submitted to: 21st Symposium (Int.) on Combustion. Munich. (1986)
Ayling A.B., Smith I.W. Measured Temperature of Burning Pulverized Fuel Particles and the Nature of the Primary Reaction Product. Combustion and Flame 18 173 - 184 (1972)
Laurendeau N.M. Heterogeneous Kinetics of Coal Char Gasification and Combustion. Progress in Energy and Combustion Science. 4 221–270 (1978).
Cooper S. Private Communication. Marchwood Engineering Laboratories. (1983).
Steam its Generation and Use. Babcock and Wilcox Publications (1978).
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© 1987 Martinus Nijhoff Publishers, Dordrecht
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Roberts, P.T., Morley, C. (1987). Practical Use of Coal Combustion Research. In: Lahaye, J., Prado, G. (eds) Fundamentals of the Physical-Chemistry of Pulverized Coal Combustion. NATO ASI Series, vol 137. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3661-4_20
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DOI: https://doi.org/10.1007/978-94-009-3661-4_20
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8138-2
Online ISBN: 978-94-009-3661-4
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