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Vortex combustor for low NOx emissions when burning lean premixed high hydrogen content fuel

United States Patent

October 20, 2009
View the Complete Patent at the US Patent & Trademark Office
A trapped vortex combustor. The trapped vortex combustor is configured for receiving a lean premixed gaseous fuel and oxidant stream, where the fuel includes hydrogen gas. The trapped vortex combustor is configured to receive the lean premixed fuel and oxidant stream at a velocity which significantly exceeds combustion flame speed in a selected lean premixed fuel and oxidant mixture. The combustor is configured to operate at relatively high bulk fluid velocities while maintaining stable combustion, and low NOx emissions. The combustor is useful in gas turbines in a process of burning synfuels, as it offers the opportunity to avoid use of diluent gas to reduce combustion temperatures. The combustor also offers the possibility of avoiding the use of selected catalytic reaction units for removal of oxides of nitrogen from combustion gases exiting a gas turbine.
Steele; Robert C. (Woodinville, WA), Edmonds; Ryan G. (Renton, WA), Williams; Joseph T. (Kirkland, WA), Baldwin; Stephen P. (Winchester, MA)
Ramgen Power Systems, LLC (Bellevue, WA)
11/ 365,969
February 28, 2006
STATEMENT OF GOVERNMENT INTEREST This invention was made with United States Government support under Contract No. DE-FC026-00NT40915 awarded by the United States Department of Energy. The Government has certain rights in the invention.