Experimental study on the optimum fuel concentration of high-concentration pulverized coal flame and the effect of coal quality

	Experimental study on the optimum fuel concentration of high-concentration pulverized coal flame and the effect of coal quality
	Wang X 1; Tan HZ 1; Yan WP 2; Wei XL(魏小林)3 ; Xu TM 1; Huia S 1
Source Publication	Proceedings of the 9th Asia-Pacific Conference on Combustion, ASPACC 2013
	2013
Conference Name	9th Asia-Pacific Conference on Combustion, ASPACC 2013
Conference Date	May 19, 2013 - May 22, 2013
Conference Place	Gyeongju, Korea, Republic of
Abstract	High-concentration pulverized coal flame plays an important role of ignition for coal combustion system with rich-lean burners. In the presented works, a series of tests have been performed in a 1MW tangentially pulverized coal-fired furnace with rich-lean burners and in a simplified down-fired furnace to investigate the relation between the coal quality and the optimum fuel concentration (kg/kg). The results show that there is always an optimum fuel concentration corresponding to the highest furnace temperature and the shortest ignition length for each group of tests on the high-concentration pulverized coal flame, and the optimum fuel concentration generally decreases with the product of volatile content and heating value linearly as the empirical formula Copt=1.0857-0.164VQ0.6.The optimum fuel concentration also decreases when the traditional corner tangential flame is replaced by wall tangential flame. However, when the horizontal rich-lean burner is changed to vertical, it does not affect the value of optimum fuel concentration. NOx emission can be controlled much more efficiently by reducing air, when the coal concentration is in the range higher than the optimum lts can provide a meaningful guide for the efficient and safe operating of coal-fired furnace with rich-lean burners.
Keyword	Coal Coal fueled furnaces Furnaces Ignition Pulverized fuel Coal concentration Coal fired furnace Combustion systems Empirical formulas Fuel concentration Furnace temperatures Pulverized coal flame Pulverized coal fired furnaces
Indexed By	EI
Language	英语
Document Type	会议论文
Identifier	http://dspace.imech.ac.cn/handle/311007/77993
Collection	高温气体动力学国家重点实验室
Affiliation	1.MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 2.School of Energy and Power Engineering, North China Electric Power University, Baoding 071003, China; 3.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Recommended Citation GB/T 7714	Wang X,Tan HZ,Yan WP,et al. Experimental study on the optimum fuel concentration of high-concentration pulverized coal flame and the effect of coal quality[C]Proceedings of the 9th Asia-Pacific Conference on Combustion, ASPACC 2013,2013.

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