Abstract
The present work aimed at combustion optimization of a 1,000 MW tower-type ultra-supercritical boiler co-firing a lean coal with bituminous coals for reducing NO X emission particularly at low load operations. Historic operation data were systematically analyzed to investigate the characteristics of NO X emission. Through comparing between lean coal co-firing and sole bituminous coal firing, it was confirmed that, besides the big difference in quality and combustion characteristics of the lean coal from the bituminous coals, the excess air ratio in main combustion zone had a significant effect on NO X emission. Keeping the ratio at properly lower level achieved lower NOX emissions at low load operations. Based on the analyses, in-situ tests successfully brought NOX emissions of co-firing down close to 300 mg/m3 at the load of 700 MW, demonstrating the effectiveness of combustion optimization for controlling NO X emissions at partial load operation of co-firing.
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References
GB13223–2011. Emission standard of air pollutants for thermal power plants, China Environment Science Press, Beijing (2012).
National Development and Reform Commission of P. C, Ministry of Environmental Protection of P. C, National Energy Administration of P. C, The upgrade and transformation action plan for coal-fired power energy saving and emission reduction (2014-2020), 12. September 2014 (2014).
Z. Ma, J. Deng, Z. Li, Q. Li, P. Zhao, L. Wang, Y. Sun, H. Zheng, L. Pan, S. Zhao, J. Jiang, S. Wang and L. Duan, Atmos. Environ., 131, 164 (2016).
S. Li, Z. Chen, E. He, B. Jiang, Z. Li and Q. Wang, Appl. Therm. Eng., 110, 223 (2017).
L. Shi, Z. Fu, X. Duan, C. Cheng, Y. Shen, B. Liu and R. Wang, Appl. Therm. Eng., 98, 766 (2016).
P. Tan, J. Xia, C. Zhang, Q. Fang and G. Chen, Energy, 94, 672 (2016).
X. Zhang, J. Zhou, S. Sun, R. Sun and M. Qin, Fuel, 142, 215 (2015).
H. Liu, N. Xin, Q. Cao, L. Sha, D. Sun and S. Wu, Korean J. Chem. Eng., 26(4), 1137 (2009).
Y. Liu, W. Fan and Y. Li, Appl. Energy, 177, 323 (2016).
H. Spliethoff, U. Greul, H. Rüdiger and K. R. G. Hein, Fuel, 75(5), 560 (1996).
Z. Liang, X. Ma, H. Lin and Y. Tang, Appl. Energy, 88(4), 1120 (2011).
Z. Wei, X. Li, L. Xu and Y. Cheng, Energy, 55, 683 (2013).
D. Dal Secco, O. Juan, M. Louis-Louisy, J. Y. Lucas, P. Plion and L. Porcheron, Fuel, 158, 672 (2015).
M. T. Javed, N. Irfan and B. M. Gibbs, J. Environ. Manage., 83, 251 (2007).
H. Nalbandian, NOX control for coal-fired plant, IEA Clean Coal Centre Report C. C/157 (2009).
W. Kim, D.-J. Lee and S.-W. Park, J. Mech. Sci. Technol., 25, 901 (2011).
R. P. van der Lam and P. Glarborg and K. Dam-Johansen, Prog. Energy Combust. Sci., 23, 349 (1997).
F. Ahmed, H. J. Cho, J. K. Kim, N. U. Seong and Y. K. Yeo, Korean J. Chem. Eng., 32(6), 1029 (2015).
Z. Luo, F. Wang, H. Zhou, R. Liu, W. Li and G. Chang, Korean J. Chem. Eng., 28(12), 2336 (2011).
J.-H. Yang, J.-E. A. Kim, J. Hong, M. Kim, C. Ryu, Y. J. Kim, H. Y. Park and S. H. Baek, Fuel, 144, 145 (2015).
GB 10184-88, Performance test code for utility boiler, Ministry of Mechanical Industry, Beijing (1988).
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This paper is reported in the 11th China-Korea Clean Energy Workshop.
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Zheng, Y., Gao, X. & Sheng, C. Impact of co-firing lean coal on NO x emission of a large-scale pulverized coal-fired utility boiler during partial load operation. Korean J. Chem. Eng. 34, 1273–1280 (2017). https://doi.org/10.1007/s11814-016-0352-7
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DOI: https://doi.org/10.1007/s11814-016-0352-7