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Chemcial Industry and Engineering 2016, Vol. 33 Issue (1) :82-89,95    DOI: 10.13353/j.issn.1004.9533.20131179
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Numerical Simulation of NOx Formation in the Combustion Chamber of a Coke Oven
Zhang Ting, Wei Hongyuan, Zheng Qianqian
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract 

As one kind of serious atmospheric pollutants, nitrogen oxides (NOx) present significant harm to ecosystems. In this paper, numerical modelling methods have been employed to simulate a coke oven combustion chamber to obtain detailed information on the formation of NOx in the combustion chamber and to predict the effects of exhaust gas recirculation process and air preheated temperature on NOx formation. The predicted data are compared to measurements in terms of NOx concentration in exhaust gas. It is concluded that most of the NOx is formed in the middle zone of the upward vertical flue in height direction due to simultaneous high temperature and high O2 concentration, while in other zones of the flues, the formation reactions of NOx, influenced either by low temperature or low O2 concentration, are reduced; employing exhaust gas recirculation process and lowering air preheated temperature are effective ways to reduce NOx formation in coke oven combustion chambers. The current work greatly helps to understand the ways used to reduce NOx formation in coke oven combustion chambers.

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Articles by authors
Zhang Ting
Wei Hongyuan
Zheng Qianqian
Keywordsnumerical simulation;   coke oven combustion chamber;   NOx formation;   exhaust gas recirculation;   air preheated temperature     
Received 2013-09-05;
Fund:

National High Technology Research and Development Program of China (863 Program) (2009AA063303)

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Zhang Ting, Wei Hongyuan, Zheng Qianqian.Numerical Simulation of NOx Formation in the Combustion Chamber of a Coke Oven[J]  Chemcial Industry and Engineering, 2016,V33(1): 82-89,95
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