Experiments of Combustion Adjustment on Boiler to Reduce NO_x Emission

Abstract:

Combustion adjustment tests about air distribution modes were performed on 1 025 t/h boiler for NO_x emission controlling. NO_x emission was affected by factors such as oxygen content, upper tertiary air, over fire air and secondary air distribution modes. Fuel-NO_x raised drastically with the increase of oxygen content. NO_x concentration declined with the rise of upper tertiary air ratio. Both average flame temperature and NO_x emission concentration decreased inversely with over fire air. Beam waist mode had the lowest NO_x emission concentration among different air distribution modes. It emitted less 14.2% NO_x than that of balanced air distribution mode. NOx concentration can be reduced 10%-20% by combustion adjustment.

• Periodical: Applied Mechanics and Materials (Volume 733)
• Pages: 346-350
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.733.346
• Online since: February 2015
• Authors: Xiao Hui Wang, Hai Ping Xiao, Yu Kun Dai, Lin Dong
• Keywords: Air Distribution, Combustion, Nox Emission, Over Fire Air, Tertiary Air

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