An Experimental Study of Reduction NOx Emissions by Superfine Pulverized Coal Reburning

Abstract:

An experimental study was conducted of reduction of NOx emissions by superfine pulverized coal reburning in Combustion Research Facility (CRF). Based on the systemically measured temperature distributions and analyzed gas samples, the influence of the attention was paid to the superfine pulverized coal reburning characteristic such as NOx emissions, slag formation conditions and mechanical incomplete combustion losses. Experimental results show that feeding pulverized coal for reburning has little influence on the furnace combustion center and slag formation. However, an increase in mechanical incomplete combustion losses was observed in the experiment. In addition, it was shown that the emission of NOx decreased obviously and the reduction efficiency was in excess of 60% with particle size of reburning fuel of 30.74 μm and the proportion of reburned fuel of 14.84%.

• Periodical: Applied Mechanics and Materials (Volumes 321-324)
• Pages: 129-136
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.321-324.129
• Online since: June 2013
• Authors: You Ning Xu, Rui Ma, Yang Wang, Zhen Zhong Li, Yun Li, Xiu Li Zhang, Yu Dong Fu
• Keywords: Experimental Study, NO_x Emission, Superfine Pulverized Coal Reburning

References

[1] SMOOT L D, HILL S C, XU H. NOx control through reburning[J]. Progress in Energy Combustion Science, 1998, 24(5): 385-408.

[2] CATE Johns. Returning technology comes of age. Power, 1997, 141(6): 57-62.

[3] Zhong Hai qing, JIN Jing, CHEN Zhan jun . Investigation of Micronized Coal Reburning[J] Technology Department of Power Engineering. 2003,34(6): 5-7.

[4] Jin Jing, Li Rui-yang, Zhang Zhong-xiao. Experimental Investigation of Super Fine Pulverized-coal Reburning Technology for Reducing NO_x emissions [J]. thermal energy and power engineering 2004, 19(6): 582-584.

[5] Zhou Hao. Artificial neural network modeling on the unburned carbon in fly ash from utility boilers [D]. 2006, Zhe jiang University: Hang zhou.

[6] Zhou Guo-ming,Li Bao-yi,Tang Jian-cheng. Experiment Research on Low-NO_x Emission Combustion of 410 t/h Pulverized-Coal Fired Boiler 410t/h [J]. Boiler Technology,2008:39 (6):58-61.

[7] JIA Yan-yan1,BI Ming-shu1,LIU Zhi. Numerical Simulation of Thermodynamic Process in Tangentially Fired Boiler to Study Boiler Reconstruction [J]. Boiler Technology,2008:39(5):43-48.