The slagging rate in high-temperature zones and the furnace exhaust temperature in boilers firing high-ash coals increase with the ash content of coal. However, the slagging situation in pulverized-coal-fired boilers often improves with increase in the ash content of coal. This is because of the different effects of increase in the ash content on the slagging in different boiler zones and for different types of coal ash. The ash content affects the temperature of flue gas and the slagging properties; the effect of these factors can be either of the same or of opposite signs.
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O. N. Edemskii, M. S. Pronin, and V. S. Matvienko, “Results of studying the combustion of Borodino coals over a wide range of their ash content in slagging-bottom furnaces of BKZ-420 boilers,” Élektr. Stantsii, No. 1, 30 – 33 (1988).
B. K. Aliyarov, L. V. Moskalenko, N. B. Kiselev, L. I. Kovler, E. K. Akhanov, and A. A. Abdrakhmanov, “Formation of ash deposits in burning Ekibastuz coal in a tangentially fired furnace of BKZ-160 boiler,” in: Combustion of Kazakhstan Coals in Boiler Furnaces [in Russian], Izd. ÉNIN im G. M. Krzhizhanovskogo, Moscow (1987), pp. 19 – 29.
Thermal Design of Boilers (Standard Method) [in Russian], Izd. NPO TsKTI, Saint-Petersburg (1998).
A. A. Abryutin, E. S. Karasina, B. N. Livshits, A. Shnirman, and B. R. Chudnovskii, “Development of a method and a code for the 3D zonal calculation of heat transfer in the furnaces of coal-fired boilers,” Therm. Eng., 45(6), 461 – 466 (1998).
A. N. Alekhnovich, Ash and Slagging in Pulverized-Coal-Fired Boilers [in Russian], Abris Print, Chelyabinsk (2016).
A. N. Alekhnovich, “Expert estimation of the slagging properties of coals,” Élektr. Stantsii, No. 8, 7 – 17 (2015).
V. V. Bogomolov, N. V. A rtem’eva, A. N. Alekhnovich, N. V. Novitskii, and N. A. Timofeeva, Thermal Coals of Eastern Russia and Kazakhstan: A Handbook [in Russian], Izd. UralVTI, Chelyabinsk (2004).
A. N. Alekhnovich, Characteristics and Properties of Thermal Coals [in Russian], Tsitsero, Chelyabinsk (2012).
E. P. Dik and A. N. Soboleva, “Slagging properties of oxidized Berezovo coal,” in: Proc. 4th All-Union Conf. on Influence of the Minerals of Power-Generating Fuels on the Operating Conditions of Steam Boilers. Sec. 1. Vol. 1 [in Russian], Tallinn (1986), pp. 56 – 60.
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Translated from Élektricheskie Stantsii, No. 3, March 2017, pp. 8 – 15.
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Alekhnovich, A.A., Artem’eva, N.V. Effect of the Ash Content on the Slagging Properties of Coals and the Slagging of Pulverized Coal-Fired Boilers. Power Technol Eng 51, 431–437 (2017). https://doi.org/10.1007/s10749-017-0851-7
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DOI: https://doi.org/10.1007/s10749-017-0851-7