Combustion characteristics and NOx emissions of two kinds of swirl burners in a 300-MWe wall-fired pulverized-coal utility boiler

Journal Article · Tue Jul 01 04:00:00 EDT 2008 · Combustion Science and Technology

DOI:https://doi.org/10.1080/00102200802043318· OSTI ID:21073677

Li, Z Q; Jing, J P; Chen, Z C; Ren, F; Xu, B; Wei, H D; Ge, Z H ^[1]

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1. Harbin Institute for Technology, Harbin (China). School for Energy Science & Engineering

Measurements were performed in a 300-MWe wall-fired pulverized-coal utility boiler. Enhanced ignition-dual register (EI-DR) burners and centrally fuel rich (CFR) swirl coal combustion burners were installed in the bottom row of the furnace during experiments. Local mean concentrations of O{sub 2}, CO, CO{sub 2} and NOx gas species, gas temperatures, and char burnout were determined in the region of the two types of burners. For centrally fuel rich swirl coal combustion burners, local mean CO concentrations, gas temperatures and the temperature gradient are higher and mean concentrations of O{sub 2} and NOx along the jet flow direction in the burner region are lower than for the enhanced ignition-dual register burners. Moreover, the mean O{sub 2} concentration is higher and the gas temperature and mean CO concentration are lower in the side wall region. For centrally fuel rich swirl coal combustion burners in the bottom row, the combustion efficiency of the boiler increases from 96.73% to 97.09%, and NOx emission decreases from 411.5 to 355 ppm at 6% O{sub 2} compared to enhanced ignition-dual register burners and the boiler operates stably at 110 MWe without auxiliary fuel oil.

• OSTI ID: 21073677
• Journal Information: Combustion Science and Technology, Journal Name: Combustion Science and Technology Journal Issue: 7 Vol. 180; ISSN CBSTB9; ISSN 0010-2202
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BOILERS
BURNERS
BURNOUT
CARBON MONOXIDE
CHARS
COAL
COMBUSTION
CONCENTRATION RATIO
EFFICIENCY
EMISSION
NITROGEN OXIDES
OXYGEN
PULVERIZED FUELS
SPATIAL DISTRIBUTION
VORTEX FLOW