Abstract
Fly ash particles entrained in the flue gas from boiler furnaces in coal-fired power stations can cause serious erosive wear on steel surfaces along the flow path. Such erosion can significantly reduce the operational life of the boiler components. A mathematical model embodying the mechanisms of erosion on behaviour, has been developed to predict erosion rates of coal-fired boiler components at different temperatures. Various grades of steels used in fabrication of boiler components and published data pertaining to boiler fly ash have been used for the modelling. The model incorporates high temperature tensile properties of the target metal surface at room and elevated temperatures and has been implemented in an user-interactive in-house computer code (EROSIM-1), to predict the erosion rates of various grades of steel. Predictions have been found to be in good agreement with the published data. The model is calibrated with plant and experimental data generated from a high temperature air-jet erosion-testing facility. It is hoped that the calibrated model will be useful for erosion analysis of boiler components.
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References
Bitter J G A 1963a A study of erosion phenomenon, Part 1.Wear 6: 5–21
Bitter J G A 1963b A study of erosion phenomenon, Part 2.Wear 6: 169–191
Deng T, Bingley M S, Bradley MSA 2004 The influence of particle rotation on the solid particle erosion rate of metals.Wear 256: 1037–1049
Fan J Cen D, Zhou K, Jin J 1990 Numerical prediction of tube row erosion by coal ash impaction.Chem. Eng. Commun. 95:75–88
Finnie I 1960 Erosion of surfaces by solid particles.Wear 142: 87–103
Gee M G, Gee R H, McNaught I 2003, Stepwise erosion as a method for determining the mechanisms of wear in gas borne particulate erosion.Wear 255: 44–55
Grant G, Tabakoff W 1975 Erosion prediction in turbomachinery resulting from environmental solid particles.J. Aircraft 12: 471–478
Hutchings I M, Winter R E 1974 Particle erosion of ductile metals: a mechanism of material removal.Wear 27: 121–128
Jun Y D, Tabakoff W 1994 Numerical simulation of a dilute particulate flow (laminar) over tube banks.Trans. ASME: J. Fluid Eng. 116: 770–777
Kragelsky I V, Dobychin M N Komalov V S 1982Friction and wear calculation methods (New York: Pergamon)
Lee B E, Fletcher C A J, Behnia M 1999 Computational prediction of tube erosion in coal-fired power utility boilers.J. Eng. Gas Turbines Power 121: 746–750
Levy A V 1986 The platelet mechanism of erosion of ductile metals.Wear 180: 1–21
Meng H C, Ludema K C 1995 Wear models and predictive equations: Their form and content.Wear 181-183:443–457
Sheldon G I, Kanhere A 1972 An investigation of impingement erosion using single particles.Wear 21: 195–209
Sheldon G L, Maji J, Crowe C T 1977 Erosion of a tube by gas-particle flow.Trans. ASME: J. Eng. Mater. Technol. 99: 138–142
Shida Y Fujikawa H 1985 Particle erosion behaviour of boiler tube materials at elevated temperature.Wear 103: 281–296
Tabor D 1951The hardness of metals (Oxford: University Press)
Tilly G P 1969 Erosion caused by airborne particles.Wear 14: 63–79
Tu J Y, Fletcher C A J, Behnia M, Reizes J A, Owens D, Jones P 1997 Prediction of flow and erosion in power utility boilers and comparison with measurement.J. Eng. Gas Turbines Power 119: 709–716
Winter R E Hutchings I M 1974 Solid particle erosion studies using single angular particles.Wear 29: 181–194
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Das, S.K., Godiwalla, K.M., Mehrotra, S.P. et al. Analytical model for erosion behaviour of impacted fly-ash particles on coal-fired boiler components. Sadhana 31, 583–595 (2006). https://doi.org/10.1007/BF02715915
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DOI: https://doi.org/10.1007/BF02715915