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Numerical study of an 870MW wall-fired boiler using De-NOx burners and an air staging system for low rank coal

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Pulverized coal-fired boilers have been used for power generation in Korea for decades. Recently, an 870-MW wall-fired boiler with De-NO TMx burners and an air staging system was constructed for use with low-rank coal. The results of a full-scale simulation of its combustion characteristics agreed well with measurements obtained under normal operating conditions for temperature, unburned carbon, and nitric oxide. Contrasting trends in unburned carbon and NOx emissions were observed, depending on the particle size and the location of the standby burner within the boiler. Combustion was also found to shift forward with small particle sizes and backward with large particle sizes. The results of a Thermo-mechanical analysis (TMA) indicated that the actual sticking temperature was lower than that suggested by the initial deformation temperature (ASTM) criteria. A logistic function was used to describe TMA shrinkage. Locations subject to high deposition potential were predicted with reference to soot-blowing phenomena.

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Correspondence to Chung-Hwan Jeon.

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Two authors contributed to this paper equally as the first author.

Recommended by Associate Editor Jeong Park

Min-Young Hwang received his B.S. (2008), M.S. (2010), and Ph.D. (2015) degrees from Pusan National University. He is currently a Principal Research Engineer at the Research Institute of Industrial Science & Technology.

Seok-Gi Ahn received his B.S. (2013) and M.S. (2015) degrees from Pusan National University. He is currently Ph.D. course in the School of Mechanical Engineering at Pusan National University.

Ho-Chang Jang received his B.S. (1992) from Pukyong National University and M.S. (2014) degrees from Pusan National University. He is currently Senior Manager in Yeosu Division at Korea South-East Power Corporation.

Gyu-Bo Kim received his B.S. (2002) from Pukyong National University, Ph.D. (2008) degrees from Pusan National University. Dr. Kim is currently a Research Professor in the Pusan Clean Coal Center.

Chung-Hwan Jeon received his B.S. (1985), M.S. (1987), and Ph.D. (1994) degrees from Pusan National University. Dr. Jeon is currently a Professor in the School of Mechanical Engineering at Pusan National University and is currently serving as a Director of the Pusan Clean Coal Center.

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Hwang, MY., Ahn, SG., Jang, HC. et al. Numerical study of an 870MW wall-fired boiler using De-NOx burners and an air staging system for low rank coal. J Mech Sci Technol 30, 5715–5725 (2016).

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