NOx Reduction and Burnout Optimisation Using an Aerodynamically Air Staged Burner and an Air Staged Precombustor Burner

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Title NOx Reduction and Burnout Optimisation Using an Aerodynamically Air Staged Burner and an Air Staged Precombustor Burner
Creator Smart, J. P.; Weber, R.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1988
Spatial Coverage presented at Pittsburgh, Pennsylvania
Abstract Recently, a significant body of work has been undertaken at the IFRF to develop low-NOx pulverised-coal burners. The majority of the work has focused on the design and evaluation of internal air staged burners at the 2.5 MW semi-i~dustrial scale. Specific emphasis has been given to retrofitting the burner designs to wall-fired combustion units. Two burner concepts have been evaluated, an aerodynamically air staged burner (AASB) and an air staged precombustor burner (ASPB). The dominant design feature of all air-staged burners is the creation of a fuel-rich zone in which volatile coal-nitrogen species react to molecular N2 in prefernce to NOx. The two burners create this fuel rich zone in fundamentally different ways. The AASB relies on optimisation of the near-burner field aerodynamics whereas the ASPB utilises a prechamber operating under sub-stoichiometric conditions. Both burner were fired with a high volatile and a medium volatile bituminous coal. Relatively low NOx emissions and acceptable burnout levels were achieved for both coals, however a coal type dependence was observed. Results of the two burners have been compared to an externally air staged burner firing the same coals.
Type Text
Format application/pdf
Language eng
Rights This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician Cliodhna Davis
Metadata Cataloger Kendra Yates
ARK ark:/87278/s63f4s73
Setname uu_afrc
Date Created 2012-04-20
Date Modified 2012-09-05
ID 5143
Reference URL https://collections.lib.utah.edu/ark:/87278/s63f4s73