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The Effect of Supply Patterns of Overfire Air on Generation of NOX and CO in a Wood pellet Fired Boiler  

Jung, Kwang-sung (Korea South-East Power Co., LTD)
Yoo, Hoseon (Department of Mechanical Engineering, Soongsil University)
Publication Information
Plant Journal / v.15, no.3, 2019 , pp. 35-41 More about this Journal
Abstract
In this study, we investigated the effect of the generation of NOx and CO by adjusting the overfire air supply position and ratio using the boiler that was converted from coal burning to wood pellet boiler. When the amount of the overfire air is relatively increased, the amount of NOx is slightly decreased but CO is sharply decreased when burning at low excess air ratio (1.10) that is due to a small fuel particle size. However, NOx slightly increased when burning at high excess air ratio (1.33) due to the large fuel size, but CO was hardly affected. Also, When the amount of overfire air was same, The more supply position was concentrated to upper portion of the main combustor, the more NOx and CO was lowered. And in case of the excess air ratio was high, the generation of NOx and CO I can see that it keeps the level irrelevant to the amount of air for the second stage combustion.
Keywords
Wood pellet fired boiler; Overfire air; NOx; CO; Excess air ratio;
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  • Reference
1 Ministry of Trade, Industry and Energy, 2017, Report of Renewable Energy 3020 Implementation Plan, pp3
2 Korea Power Engineering Company, Inc., 2016, Technical Support Services Report of Environmental facilities Extension in Yeongdong Thermal Power Plant Unit 1,2, pp. 1-8
3 Juan Riaza, 2017, Ignition and combustion of single particles of coal and biomass, Fuel vol.202 pp.650-655   DOI
4 Noriyuki, 1991, The effects of coal particle size on reductions of NOX and unburnt carbon, American Flame research Committee, Paper NO.4