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Environmental Engineering Research 2009;14(3): 158-163. DOI: https://doi.org/10.4491/eer.2009.14.3.158
NO Reduction and High Efficiency Combustion by Externally Oscillated Staging Burner
Mun Sup Lim1, Won Yang2, and Young Nam Chun1
1BK21 Team for Hydrogen Production․Department of Environmental Engineering, Chosun University, Gwangju 501-759, Korea
2Manufacturing System Division Intelligent Industrial Machinery Team, Korea Institute of Industrial Technology, Cheonan 331-825, Korea
Corresponding Author: Young Nam Chun ,Tel: +82-62-230-7156, Fax: +82-62-230-7156, Email: ynchun@chosun.ac.kr
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It is difficult for a burner to achieve an increase in combustibility and a reduction of NOx emission, simultaneously. The reason is because thermal NOx could be reduced at low temperature, while the combustibility should be decreased. To solve this problem, an externally oscillated staging burner was developed, and experiment was conducted according to effective parameters. The combustibility could be improved through the accelerated transfer of heat, mass and momentum obtained by external oscillation. Also, NO is reduced by the decrease of residence time of burning gas in the local highest-temperature spot, which is decreased by the external oscillation and fuel staging. Experiments on variables were conducted to determine the reference flame, and the flame generating the lowest NO concentration was selected. The conditions of reference flame were oscillation frequency 250 Hz, sound pressure 1 VPP, and air ratio 1.1, and NO and CO concentrations were 1ppm and 20 ppm, respectively.
Keywords: External oscillation | Gas burner | NO | Fuel staging | Combustibility
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