Methods of combustion of powdered fuels and powdered fuel dispersions
Patent No. 9,016,216
Issued: April 28, 2015
Inventor: McKnight; James K. (Ithaca, NY), Bacorn; Edward (Lansing, NY),
White; Ken W. (Ithaca, NY)
Methods of combustion include metering a substantially explosible powder into an oxidizing gas using a positive displacement powder dispersion device to suspend the powder in the gas and directing the powder in the gas to form a controlled stream of a moving explosible powder dispersion. In some embodiments, the method further includes igniting the dispersion with an ignition source to produce a stationary deflagrating combustion wave and sustaining combustion by continuing to meter the powder into the gas. In other embodiments, the method further includes adjusting a nozzle velocity of the dispersion to reflect properties of the dispersion to create a sustainable flame and igniting the dispersion to produce a stationary deflagrating wave of the dispersion. In other embodiments, the method further includes igniting the dispersion in a combustion area to produce a stationary deflagrating wave such that a conductive heat transfer from combustion brings the powder to combustion temperature.
Reference to Related Applications
This is a continuation patent application of co-pending PCT application serial number PCT/US2007/024044, filed Nov. 16, 2007, entitled "POWDERED FUELS, DISPERSIONS THEREOF, AND COMBUSTION DEVICES RELATED THERETO", which claims priority to U.S. provisional patent application Ser. No. 60/859,779, filed Nov. 17, 2006, U.S. provisional patent application Ser. No. 60/868,408, filed Dec. 4, 2006, and U.S. provisional patent application Ser. No. 60/993,221, filed Sep. 10, 2007. The benefit under 35 USC .sctn.119(e) of the United States provisional applications is hereby claimed, and the aforementioned applications are hereby incorporated herein by reference.
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