Burner system including a distal flame holder and a non-reactive fluid source
AssigneeClearsign Technologies Corporation
InventorsCOLIN JAMES DELLER, DONALD KENDRICK, VENKATESH IYER, DOUGLAS W. KARKOW
Life of this patent
Estimating the term…
Abstract
A burner includes a distal flame holder, first and second fuel nozzles, a fuel and oxidant source, and a mixing tube disposed upstream from the distal flame holder. Fuel emitted from the first fuel nozzle mixes with oxidant from the oxidant source to form a fuel and oxidant mixture to support combustion in the distal flame holder. A non-reactive fluid source such as recirculated flue gas provides a non-reactive fluid for dilution of the fuel and oxidant mixture to prevent flashback.
Claims41
A burner system, comprising:
- at least one distal flame holder for disposition in a combustion volume and configured to receive and ignite a fuel and oxidant mixture;
- a fuel source configured to contribute a fuel to the fuel and oxidant mixture;
- an oxidant source configured to contribute an oxidant to the fuel and oxidant mixture;
- a mixing tube disposed in a dilution region between the distal flame holder and an outlet of the fuel source, the mixing tube configured to receive and facilitate mixing of the fuel and the oxidant;
- a pilot fuel nozzle disposed proximate the distal flame holder and downstream from a distal end of the mixing tube;
- and
- a non-reactive fluid source configured to deliver a non-reactive fluid in the dilution region while the fuel and the oxidant are contributed into the dilution region by the fuel source and the oxidant source and while the distal flame holder supports a combustion reaction of the fuel and oxidant mixture.
A burner system, comprising:
- a distal flame holder configured to hold a combustion reaction of a fuel and an oxidant;
- an oxidant conduit configured to direct the oxidant toward the distal flame holder;
- a first fuel nozzle oriented to direct a first flow of the fuel into a combustion volume for mixture with the oxidant in a dilution region between the first fuel nozzle and the distal flame holder when a temperature of the distal flame holder is above a predetermined temperature;
- a mixing tube disposed in the dilution region, and being open between the distal flame holder and the first fuel nozzle;
- and
- a non-reactive fluid source oriented to provide a non-reactive fluid into the mixing tube when the distal flame holder is at an operating temperature.
A method for inhibiting flashback in a burner system, the method comprising:
- supplying an oxidant to a combustion volume;
- directing a fuel via a first fuel nozzle to a dilution region of the combustion volume between the first fuel nozzle and a distal flame holder;
- mixing the oxidant with the fuel from the first fuel nozzle in a mixing tube disposed in the dilution region and open between the first fuel nozzle and the distal flame holder to provide a mixture of the fuel and the oxidant, the mixing tube configured to receive and facilitate mixing of the fuel and the oxidant;
- and
- providing a non-reactive fluid to the mixture of the fuel and the oxidant in the dilution region.
A multi-stage burner system, comprising:
- a fuel and oxidant source configured to emit fuel and oxidant into a combustion volume;
- a distal flame holder oriented to receive and ignite a first mixture of the fuel and the oxidant downstream of the fuel and oxidant source;
- and
- at least one intermediate flame holder disposed between the fuel and oxidant source and the distal flame holder and oriented to receive a second mixture of the fuel and the oxidant.
Dependencies are inferred from the claim text.