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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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Abstract

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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References

  1. A. Weiguo and M. K. Jhon, Simulation of coal ash particle deposition experiments, Energ. Fuel (2011) 708–718.

    Google Scholar 

  2. L. Ma, J. M. Jones, M. Pourkashanian and A. Williams, Modelling the combustion of pulverized biomass in an industrial combustion test furnace, Fuel, 86 (2007) 1959–1965.

    Article  Google Scholar 

  3. A. Bosoaga, N. Panoiu, L. Mihaescu, R. I. Backreedy, L. Ma, M. Pourkashanian and A. Williams, The combustion of pulverized low grade lignite, Fuel, 85 (2006) 1591–1598.

    Article  Google Scholar 

  4. Y. M. Sung, C. H. Choi, C. E. Moon, S. Y. Eom, J. J. Lee, B. D. Kim, G. M. Choi and D. J. Kim, Nitric oxide emissions and combustion performance of nontraditional ring-fired boilers with furnace geometries, Journal of Mechanical Science and Technology, 29 (8) (2015) 3489–3499.

    Article  Google Scholar 

  5. R. P. Gupta, T. F. Wall and L. Baxter, Impact of mineral impurities in solid fuel combustion, Proc. Eng. Found. Conf. Miner. Matt. Fuel. (1997) 155–169.

    Google Scholar 

  6. R. I. Backreedy, L. M. Fletcher, J. M. Jones, L. Ma, M. Pourkashanian and A. Williams, Co-firing pulverized coal and biomass: a modeling approach, Proc. Combust. Inst., 30 (2005) 2955–2964.

    Article  Google Scholar 

  7. L. Ma, M. Gharebaghi, R. Porter, M. Pourkashanian, J. M. Jones and A. Williams, Modelling methods for co-fired pulverized fuel furnace, Fuel, 88 (2009) 2248–2249.

    Article  Google Scholar 

  8. D. W. Van Krevelen, C. Van Heerden and F. J. Huntgens, Physicochemical aspects of the pyrolysis of coal and related organic compounds, Fuel, 30 (1951) 253.

    Google Scholar 

  9. H. Kobayashi, J. B. Howard and A. F. Salofim, Coal devolatilization at high temperatures, Proc. Combust. Inst., 16 (1977) 411.

    Article  Google Scholar 

  10. P. R. Solomon, D. G. Humblem, R. M. Carangelo, M. A. Serio and G. V. Despande, General model of coal devolatilization, Energ. Fuel, 2 (1988) 405.

    Article  Google Scholar 

  11. S. Niksa and A. Kerstein, Flashchain theory for rapid coal devolatilization kinetics, 1. Formulation, Energ. Fuel, 5 (1991) 647.

    Article  Google Scholar 

  12. T. H. Fletcher, A. R. Kerstein, R. J. Pugmire, M. S. Solem and D. M. Grant, Chemical percolation model for devolatilization, 3. Direct use of 13C NMR data to predict effects of coal type, Energ. Fuel, 6 (1992) 414.

    Article  Google Scholar 

  13. P. T. Jenson and R. E. Mitchell, High-temperature char reactivity measurement in the Sandia laminar flow reactor, Project No. 1323/87-16 (1993).

    Google Scholar 

  14. I. Kuniyoshi, Advanced pulverized coal injection technology and blast furnace operation, Burlington: Elsevier (2000).

    Google Scholar 

  15. M. M. Baum and P. J. Street, Predicting the combustion behavior of coal particles, Combust. Sci. Tech., 3 (5) (1971) 231–343.

    Article  Google Scholar 

  16. M. A. Field, Rate of combustion of size-graded fraction of char from a low-rank coal between 1200 K-2000 K, Combust. Flame, 13 (1969) 237–252.

    Article  Google Scholar 

  17. R. G. Kim and C. H. Jeon, Intrinsic reaction kinetics of coal char combustion by direct measurement of ignition temperature, Appl. Therm. Eng., 63 (2014) 565–576.

    Article  Google Scholar 

  18. R. G. Kim, C. W. Hwang and C. H. Jeon, Kinetics of coal char gasification with CO2: Impact of internal/external diffusion at high temperature and elevated pressure, Appl. Energ., 129 (2014) 299–307.

    Article  Google Scholar 

  19. M. Y. Hwang, S. M. Kim, G. B. Kim, B. H. Lee, J. H. Song, M. S. Park and C. H. Jeon, Simulation studies on direct ash recycling and reburning technology in a tangential fired 500 MW pulverized coal boiler, Fuel, 112 (2013) 78–87.

    Article  Google Scholar 

  20. B. F. Magnussen and B. H. Hjertager, On mathematical models of turbulent combustion with special emphasis on soot formation and combustion, Proc. Combust. Inst., 16 (1977) 719–729.

    Article  Google Scholar 

  21. S. C. Hill and L. D. Smoot, Modeling of nitrogen oxides formation and destruction in combustion systems, Prog. Energ. Combust., 26 (2000) 417–458.

    Article  Google Scholar 

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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). https://doi.org/10.1007/s12206-016-1142-1

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  • DOI: https://doi.org/10.1007/s12206-016-1142-1

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