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Reduce Fuel Costs and NOx Emissions by Controlling Excess Oxygen in the Firebox

[+] Author Affiliations
Gary A. Lang, Brien Knight, Paul Barker

Marathon Sensors, Inc., Cincinnati, OH

Paper No. PWR2005-50195, pp. 751-754; 4 pages
  • ASME 2005 Power Conference
  • ASME 2005 Power Conference
  • Chicago, Illinois, USA, April 5–7, 2005
  • Conference Sponsors: Power Division
  • ISBN: 0-7918-4182-0
  • Copyright © 2005 by ASME


The real time, in-situ measurement of excess oxygen and temperature in the radiant heat zone of a boiler or furnace provides a window for viewing combustion conditions closest to the source. Excess oxygen and temperature measurements, taken at strategic sample points around the firebox, provide timely information for optimal trim control of the combustion process. With fuel costs skyrocketing and a focus on reducing NOx emissions, it is essential that the excess oxygen measurement be fast and accurate. Commercially available in-situ, high temperature oxygen sensors have the potential to solve combustion control and burner management problems with short payback and high annual ROI in power applications.

Copyright © 2005 by ASME



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