Influence of type of burner on NO emissions for pulverized coal preheating method

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	Influence of type of burner on NO emissions for pulverized coal preheating method
	Liu, Changchun 1; Hui, Shien 1; Zhang, Xiaolu 1; Wang, Denghui 1; Zhuang, Huiyong 2; Wang, Xueyao 3
刊名	APPLIED THERMAL ENGINEERING
	2015-06-25
卷号	85 页码:278-286
关键词	Coal preheating Coal burner Air staging NOx
英文摘要	Coal preheating method has demonstrated great potential to reduce NOx emissions. Interestingly, whether this method is suitable for all types of burner remains to be elucidated. Four types of burner with different air staging schemes were studied in the present experiments. With coal preheating method, numerous nitrogen (N) intermedias (HCN), soot and hydrocarbons (Sigma CiHj) were yielded in the preheating chamber. However, in oxygen-rich conditions the N-intermedias were easily converted to NO, and the most soot and hydrocarbons (Sigma CiHj) were oxidized before reducing the NO to N-2. The type of burner and the way of air staging had a significant effect on NO emissions. Without air staging NO emissions even increased using a bad burner, and the NO emissions were almost unchanged as the speed of outer secondary air increased from 23 m/s to 118 m/s. Three fitting formulas were summarized based on a large number of experimental data. The close-coupled over fire air played a more important role when the speed of outer secondary air was lower or the volatile content of coal was lower. The residence time in the reducing zone was also a key to reduce NO emissions. (C) 2015 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
关键词[WOS]	CIRCULATING FLUIDIZED-BED ; NITRIC-OXIDE ; NITROGEN ; CONVERSION ; COMBUSTION ; FLAMES
收录类别	SCI
语种	英语
WOS记录号	WOS:000356982300028
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98903]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Xi An Jiao Tong Univ, Sch Energy & Power Engn, Xian 710049, Peoples R China 2.Natl Bio Energy Grp Co Ltd, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, Changchun,Hui, Shien,Zhang, Xiaolu,et al. Influence of type of burner on NO emissions for pulverized coal preheating method[J]. APPLIED THERMAL ENGINEERING,2015,85:278-286.
APA	Liu, Changchun,Hui, Shien,Zhang, Xiaolu,Wang, Denghui,Zhuang, Huiyong,&Wang, Xueyao.(2015).Influence of type of burner on NO emissions for pulverized coal preheating method.APPLIED THERMAL ENGINEERING,85,278-286.
MLA	Liu, Changchun,et al."Influence of type of burner on NO emissions for pulverized coal preheating method".APPLIED THERMAL ENGINEERING 85(2015):278-286.