A New Method for Determining Pulverized Coal Economic Fineness

Abstract:

Coal blending technology is commonly used in coal-fired thermal power plant in recent years to ease cost pressures. But thermal power plants still use empirical formula to determine the economic fineness of pulverized coal. This approach cannot change economic fineness of pulverized coal based on the proportion of blending coal timely and accurately, resulting in increasing carbon content of fly-ash and reduced combustion efficiency of boiler. In this paper, a new method for determining pulverized coal economic fineness is proposed. Dry ash-free basis volatile, coal uniformity index, ignition temperature, proportion of blending coal are considered as parameters. According to the relationship between these parameters, the best coal fineness can be obtained in real-time. Influences of coal blending technology are reduced greatly and the accuracy of the economic fineness is improved.

• Periodical: Applied Mechanics and Materials (Volume 441)
• Pages: 1072-1076
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.441.1072
• Online since: December 2013
• Authors: Xiao Bin Huang, Pei Chao Zhang, Long Fei Liang
• Keywords: Coal Blending Technology, Combustion Optimization, Pulverized Coal Economic Fineness

References

[1] Feng Hua. Discussion of coal fineness's impact on boiler operation[J]. Shandong Electric Power Technology, 1997 (1): 9-11.

[2] Zhong Liu, Weiping Yan, Zhengyang Gao. Pulverized coal fineness impacts on the reduction of NO [J]. Proceedings of the CSEE, 2003, 23(10): 204-208.

[3] Junkai Feng, Youting Shen, Ruichang Yang. Boiler principle and calculation[M]. Science Press, (2003).

[4] Haiping Zhou. Selection and control of coal pulverized coal fineness [J]. East China Electric Power, 1993, 2: 007.

[5] Yonghua Li, Wolong Yang, Chang jiagang. Selection and optimization of power plant boiler pulverized coal economic fineness [J]. Boiler Technology, 2011, 42(4): 34-37.

[6] Tao Yang, Yanping Zhang, Xing Xu. Study of 600 MW unit boiler mixed burning of coal[J]. Power equipment, 2010, 24(004): 233-236.

[7] Jia Guo, Hancai Zeng. Study of mixed coal volatile content determination method in a large power plant[J]. Boiler Technology, 1993, 7: 002.

[8] Caisheng Dai. Experimental research of volatile linear additivity [J]. Coal Chemical Industry, 2005, 33(3): 42-44.