 Effect of the separated overfire air location on the combustion optimization and NOx reduction of a 600MWe FW down-fired utility boiler with a novel combustion systemLun Ma, Qingyan Fang, Peng Tan, Cheng Zhang, Gang Chen, Dangzhen Lv, Xuenong Duan and Yiping Chen Applied Energy, 2016, vol. 180, issue C, 104-115 Abstract: A novel combustion system has been applied to a 600MWe down-fired boiler to reduce NOx emissions without producing an obvious increase in the carbon content of fly ash. The system mainly includes moving fuel-lean nozzles from the arches to the front/rear walls, and re-arranging the staged air, as well as introducing separated-over-fire air (SOFA). This paper evaluates the effects of the SOFA locations (on the arches, on the throat, and on the upper furnace) on the combustion and NOx emissions characteristics using simulations. The numerical results are in good agreement with the measured results. Compared to the original combustion system, significant NOx reduction (approximately 50%) is found for all three SOFA location settings. Taking economic efficiency and NOx emissions into account, the SOFA on the upper furnace is adopted in the actual modification, and no negative effects are observed. Keywords: Down-fired boiler; SOFA location; Combustion characteristics; NOx emissions (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:180:y:2016:i:c:p:104-115 Ordering information: This journal article can be ordered from DOI: 10.1016/j.apenergy.2016.07.102 Access Statistics for this article Applied Energy is currently edited by J. Yan More articles in Applied Energy from Elsevier |
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