# US 9,752,777 B2 · Pulverized fuel-oxygen burner > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,777 B2 - Document ID: US9752777B2 - Status: Granted - Kind: B2 - Application number: 14/372,309 - Filed: 2013-09-05 - Published: 2016-06-16 - Granted: 2017-09-05 - Earliest claimed: 2013-09-05 - Assignees: Honeywell International Inc. - Applicants: Honeywell International Inc. - Inventors: Curtis Taylor; Brad Patterson; Jayson Perdue - Web page: https://patentgrep.com/patent/US9752777B2 ## CPC - F23L 7/007: {Supplying oxygen or oxygen-enriched air} - F23C 6/045: {with staged combustion in a single enclosure} - F23D 1/00: Burners for combustion of pulverulent fuel - F23C 2201/20: Burner staging - F23D 2201/00: Burners adapted for particulate solid or pulverulent fuels - F23D 2201/20: Fuel flow guiding devices - F23D 2900/00006: Liquid fuel burners using pure oxygen or oxygen-enriched air as oxidant - Y02E 20/34: Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery - F23L: SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ({air-supply arrangements for fluent fuels F23C;} firebridges with means for feeding air or steam F23M3/04; baffles or shields with air supply passages F23M9/04); VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS {(dampers and throat restrictors for open fire-places F24; air inlet valves for open fire fronts F24)}; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES - F23C: METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR (burners F23D) - F23D: BURNERS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A burner assembly combines oxygen and fuel to produce a flame. The burner assembly includes an oxygen supply tube adapted to receive a stream of oxygen and a solid fuel conduit arranged to extend through the oxygen tube to convey a stream of fluidized, pulverized, solid fuel into a flame chamber. Oxygen flowing through the oxygen supply tube passes generally tangentially through a first set of oxygen-injection holes formed in the solid fuel conduit and off-tangentially from a second set of oxygen-injection holes formed in the solid fuel conduit and then mixes with fluidized, pulverized, solid fuel passing through the solid fuel conduit to create an oxygen-fuel mixture in a downstream portion of the solid fuel conduit. This mixture is discharged into a flame chamber and ignited in the flame chamber to produce a flame. ## Claims ### Claim 1 A burner assembly for combining fuel and oxygen to produce a combustible fuel-oxygen mixture, the burner assembly comprising: a solid fuel conduit having a longitudinal axis in the longitudinal direction, said solid fuel conduit formed to include a fuel transport passage for transporting fluidized, pulverized solid fuel, said solid fuel conduit defining an inlet opening for receiving the fluidized, pulverized solid fuel, said inlet opening having a cross-sectional area; said solid fuel conduit further defining a fuel-oxygen nozzle, said fuel-oxygen nozzle having a side wall and said fuel-oxygen nozzle formed to include a fuel-oxygen transport passage, a fuel inlet opening located to admit the fluidized, pulverized solid fuel from the fuel transport passage into the fuel-oxygen transport passage, and a fuel-oxygen outlet opening located to discharge a fuel-oxygen mixture into a flame chamber; a primary oxygen conduit located about said fuel-oxygen nozzle, said primary oxygen conduit formed to include a primary oxygen inlet and a primary oxygen passage; a first plurality of oxygen injection nozzles located in said side wall of said fuel-oxygen nozzle and configured to admit oxygen from said primary oxygen passage into said fuel-oxygen nozzle in a direction substantially orthogonal to said longitudinal axis in the longitudinal direction to mix with the fluidized, pulverized solid fuel in the fuel-oxygen transport passage and to establish a combustible fuel-oxygen mixture flowing in the fuel-oxygen transport passage and exiting through the fuel-oxygen outlet opening; and an oxygen distribution ring located within said primary oxygen passage between said primary oxygen inlet and said first plurality of primary oxygen injection nozzles, said oxygen distribution ring defining a plurality of apertures in fluid communication with said primary oxygen inlet and said first plurality of primary oxygen injection nozzles. ### Claim 2 (depends on 1) The burner assembly of claim 1 wherein said first plurality of primary oxygen injection nozzles is configured to admit said oxygen from said primary oxygen passage into said fuel-oxygen nozzle in a direction substantially tangential to said side wall of said fuel-oxygen nozzle. ### Claim 3 (depends on 2) The burner of claim 2 further comprising a second plurality of primary oxygen injection nozzles located in said sidewall of said fuel-oxygen nozzle, said second set of oxygen injection nozzles configured to admit oxygen from said primary oxygen passage into said fuel-oxygen transport passage in a direction having a component tangential to said side wall of said fuel-oxygen nozzle and a component radial to said side wall of said fuel-oxygen nozzle. ### Claim 4 (depends on 3) The burner of claim 3 wherein said first plurality of primary oxygen injection nozzles is upstream of said second plurality of primary oxygen injection nozzles. ### Claim 5 (depends on 3) The burner of claim 3 wherein said first plurality of primary oxygen injection nozzles is downstream of said second plurality of primary oxygen injection nozzles. ### Claim 6 (depends on 1) The burner assembly of claim 1 wherein said first plurality of primary oxygen injection nozzles is configured to admit said oxygen from said primary oxygen passage into said fuel-oxygen nozzle in a direction having a component tangential to said side wall of said fuel-oxygen nozzle and a component radial to said side wall of said fuel-oxygen nozzle. ### Claim 7 (depends on 1) The burner assembly of claim 1 further comprising: a volume displacement member positioned within said solid fuel conduit, said volume displacement member and said solid fuel conduit together defining an annular flow region, a portion of said annular flow region having a first cross-sectional area substantially equivalent to said cross-sectional area of said inlet opening of said solid fuel conduit. ### Claim 8 (depends on 7) The burner assembly of claim 7 wherein a further portion of said annular flow region proximate said fuel-oxygen nozzle has an increasing cross-sectional area compared to said first cross-sectional area. ### Claim 9 (depends on 7) The burner assembly of claim 7 wherein a further portion of said annular flow region proximate said first plurality of primary oxygen injection nozzles has a second cross-sectional area greater than said first cross-sectional area. ### Claim 10 (depends on 1) The burner assembly of claim 1 further comprising: an additional oxygen distribution ring located in said primary oxygen passage between said oxygen distribution ring and said first plurality of primary oxygen injection nozzles, said additional oxygen distribution ring defining a plurality of apertures in fluid communication with said primary oxygen inlet and said first plurality of primary oxygen injection nozzles. ### Claim 11 (depends on 1) The burner assembly of claim 1 further comprising: a secondary oxygen conduit located about said primary oxygen conduit, said secondary oxygen conduit formed to include a secondary oxygen inlet and a secondary oxygen passage; a secondary oxygen ring defining at least one aperture, said at least one aperture in fluid communication with said secondary oxygen passage and said flame chamber. ### Claim 12 (depends on 11) The burner assembly of claim 11 wherein said secondary oxygen ring has an axis and said at least one aperture of said secondary oxygen ring has an axis parallel to said axis of said secondary oxygen ring. ### Claim 13 (depends on 11) The burner assembly of claim 11 wherein said secondary oxygen ring has an axis and said at least one aperture of said secondary oxygen ring has an axis converging with said axis of said secondary oxygen ring. ### Claim 14 (depends on 1) The burner assembly of claim 1 further comprising a nozzle sweep ring, said nozzle sweep ring defining at least one slot in fluid communication with said primary oxygen passage and said flame chamber. ### Claim 15 A burner assembly for combining fuel and oxygen to produce a combustible fuel-oxygen mixture, the burner assembly comprising: a solid fuel conduit having a longitudinal axis in the longitudinal direction, said solid fuel conduit formed to include a fuel transport passage for transporting fluidized, pulverized solid fuel, said solid fuel conduit defining an inlet opening for receiving the fluidized, pulverized solid fuel, said inlet opening having a cross-sectional area; said solid fuel conduit further defining a fuel-oxygen nozzle, said fuel-oxygen nozzle having a side wall and said fuel-oxygen nozzle formed to include a fuel-oxygen transport passage, a fuel inlet opening located to admit the fluidized, pulverized solid fuel from the fuel transport passage into the fuel-oxygen transport passage, and a fuel-oxygen outlet opening located to discharge a fuel-oxygen mixture into a flame chamber; a primary oxygen conduit located about said fuel-oxygen nozzle, said primary oxygen conduit formed to include a primary oxygen inlet and a primary oxygen passage; a first plurality of oxygen injection nozzles located in said side wall of said fuel-oxygen nozzle and configured to admit oxygen from said primary oxygen passage into said fuel-oxygen nozzle in a direction substantially orthogonal to said longitudinal axis in the longitudinal direction to mix with the fluidized, pulverized solid fuel in the fuel-oxygen transport passage and to establish a combustible fuel-oxygen mixture flowing in the fuel-oxygen transport passage and exiting through the fuel-oxygen outlet opening; a first oxygen distribution ring located within said primary oxygen passage between said primary oxygen inlet and said first plurality of primary oxygen injection nozzles, said first oxygen distribution ring defining a plurality of apertures in fluid communication with said primary oxygen inlet and said first plurality of primary oxygen injection nozzles; and a second oxygen distribution ring located in said primary oxygen passage between said first oxygen distribution ring and said first plurality of primary oxygen injection nozzles, said second oxygen distribution ring defining a plurality of apertures in fluid communication with said primary oxygen inlet and said first plurality of primary oxygen injection nozzles.