Ultra-Low-Emission Burner for Boilers and Fluid Heaters

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Title Ultra-Low-Emission Burner for Boilers and Fluid Heaters
Creator Abbasi, H. A.; Khinkis, Mark J.; Cygan, David F.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1991
Spatial Coverage presented at Hartford, Connecticut
Abstract The Institute of Gas Technology (IGT) is developing a premixed cyclonic combustion approach for boilers and indirect fluid heaters in the range of 5 to 300X 10 Btu/h. When fired with natural gas, this advanced design approach is expected to provide NOx emissions below 15 vppm while maintaining CO levels below 50 vppm and total hydrocarbon (THC) levels below 10 vppm (all at 0% O2). With oil (backup), the NOx as well as CO and THC emissions would still be very low - all below 50 vppm at 0% O2. The ultra-low NOx emissions are achieved by exploiting two unique characteristics of cyclonic combustion internal recirculation of partially cooled combustion products and high convective heat transfer. These characteristics are enhanced in the IGT premixed design not only to decrease the overall combustion temperatures, but also to create very uniform temperature and oxygen profiles, thereby significantly decreasing the peak flame temperatures as well as the localized pockets of high O2 availability - the primary causes of NOx formation. This paper discusses the concept and the results of the proof-of-concept tests carried out on 1.6 and 8 X 10^6 Btu/h (40 and 200 hp) flexible test burners at IGT's Energy Development Center. The results show stable operation and the potential for about 15 ppm NOx with less than 50 ppm CO (<2 ppm THC) with combustion air staging, and less than 10 ppm NOx with less than 30 ppm CO (< 1 ppm THC) by simply using 45% excess air. The very low emissions with high excess air show the potential for similar reductions by the use of flue gas recirculation (FGR). The initial development effort is being targeted at the fire tube boiler retrofit market and will focus on the optimization of combustion air staging.
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/s6j67kgh
Setname uu_afrc
Date Created 2012-04-20
Date Modified 2012-09-20
ID 6577
Reference URL https://collections.lib.utah.edu/ark:/87278/s6j67kgh