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Effects of the addition of arch-supplied secondary air on the performance of the Foster Wheeler down-fired boiler: Air/particle flow, combustion and NOx emissions.
- Source :
-
Fuel . Sep2024:Part B, Vol. 371, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- • Proposed effective low NO x combustion technology with arch-supplied secondary air. • The flow characteristics of the two-phase flows in the furnace were investigated. • Arch-supplied secondary air increases the downward impulse of the two-phase flow. • Increasing arch-supplied secondary air rate can improved the combustion performance. This study proposes a low NO x combustion method for Foster Wheeler type down-fired boilers. The effectiveness of this technique was validated through laboratory-scale gas-particle two-phase experiments and industrial trials. The flow field characteristics within FW-type boiler furnaces equipped with arch-supplied secondary air injection nozzles were investigated. Furthermore, the application of this technique to a 660 MW subcritical FW-type boiler was examined, focusing on NO x emissions and combustion characteristics. Results demonstrate that optimizing the damper openings for F-layer and arch-supplied secondary air can significantly reduce NO x emissions by over 33 %. Additionally, increasing the mass flow rate of arch-supplied secondary air aids in reducing unburned carbon in fly ash and inducing a downward shift in the flame center within the furnace. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00162361
- Volume :
- 371
- Database :
- Academic Search Index
- Journal :
- Fuel
- Publication Type :
- Academic Journal
- Accession number :
- 177845623
- Full Text :
- https://doi.org/10.1016/j.fuel.2024.132074