Experimental Study on NOx Emission Characteristics of Pulverized Coal Oxygen-enriched Staged Combustion

被引：0
|
作者：
Chen H. [1 ]
Niu F.
Gong Y. [2 ]
Wei Y. [2 ]
Wang N. [2 ]
机构：
[1] China Coal Research Institute, Chaoyang District, Beijing
[2] China Coal Research Institute Company of Energy Conservation, Chaoyang District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 08期
关键词：
air staged combustion; burning efficiency; low-nitrogen combustion; NO[!sub]x[!/sub] emission; oxy-fuel combustion; pulverized coal;
D O I：
10.13334/j.0258-8013.pcsee.212824
中图分类号：
学科分类号：
摘要：
The development of new ultra-low NOx pulverized coal combustion technology is one of the effective approaches to achieving the goal of carbon peak and carbon neutrality. In this paper, a two-stage high temperature dropper furnace is used to study the NOx emission of fractional combustion of pulverized coal under the condition of high temperatures and oxygen-enriched. The experimental results show that either too large or too small secondary air volume is not conducive to suppressing NO generation, and there is an interactive effect of secondary air oxygen concentration and secondary air volume on NOx emission; and the optimal secondary air oxygen concentration corresponding to the lowest NOx emission concentration decreases with the increase of the secondary air volume oxygen factor. When the secondary air volume oxygen factor is 0.4~0.5 and the secondary air oxygen concentration is 30%~70%, there are several groups of working conditions where the NOx emission concentration meets the ultra-low emission requirements, and the carbon content of fly ash is less than 8% at this time. High-temperature oxygen-rich graded combustion can achieve high efficiency combustion of pulverized coal while directly achieving ultra-low NOx emissions. ©2023 Chin.Soc.for Elec.Eng.
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页码：3092 / 3099
页数：7
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