# US 8,739,549 B2 · Systems and methods for feedstock injection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,549 B2 - Document ID: US8739549B2 - Status: Granted - Kind: B2 - Application number: 12/755,369 - Filed: 2010-04-06 - Published: 2011-10-06 - Granted: 2014-06-03 - Earliest claimed: 2010-04-06 - Assignees: General Electric Company - Applicants: Benjamin Campbell Steinhaus - Inventors: Benjamin Campbell Steinhaus - Web page: https://patentgrep.com/patent/US8739549B2 ## CPC - F23N 1/02: conjointly with air supply - F23D 1/00: Burners for combustion of pulverulent fuel - F23N: REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187) - F23D: BURNERS ## Abstract Systems and methods for injection of feedstock are included. In one embodiment, a system includes a solid fuel injector. The solid fuel injector includes a solid fuel passage, a first gas passage, and a second gas passage. The solid fuel passage is configured to inject a solid fuel through a fuel outlet in a fuel direction. The first gas passage is configured to inject a first gas through a first gas outlet in a first gas direction. The second gas passage is configured to inject a second gas through a second gas outlet in a second gas direction. The first gas direction is oriented at a first angle relative to the fuel direction. The second gas direction is oriented at a second angle relative to the fuel direction, and the first and second angles are different from one another. ## Claims ### Claim 1 A system, comprising: a solid fuel injector, comprising: a solid fuel passage disposed axially with respect to the solid fuel injector and configured to inject a solid fuel through a fuel outlet in a fuel direction; and a first gas passage configured to inject a first gas through a first gas outlet in a first gas direction, wherein the first gas direction is oriented at a first angle relative to the fuel direction; a second gas passage configured to inject a second gas through a second gas outlet in a second gas direction, wherein the second gas direction is oriented at a second angle relative to the fuel direction, and the first and second angles are different from one another, wherein the first gas passage is disposed concentrically surrounding the solid fuel passage, and the second gas passage is disposed concentrically surrounding the first gas passage; a fuel pump fluidly coupled to the solid fuel passage and communicatively coupled to a controller, wherein the fuel pump is configured to direct the solid fuel into the solid fuel passage; a first valve fluidly coupled to the first gas passage and communicatively coupled to the controller, wherein the first valve is configured to adjust a first flow of the first gas through the first passage; and a second valve fluidly coupled to the second gas passage and communicatively coupled to the controller, wherein the second valve is configured to adjust a second flow of the second gas through the second passage; and the controller configured to inject the solid fuel axially with respect to the solid fuel injector by actuating the fuel pump, inject the first gas concentrically about the solid fuel passage to impact the solid fuel by actuating the first valve, and inject the second gas concentrically about the first gas passage to impact the first gas, the solid fuel, or a combination thereof, by actuating the second valve. ### Claim 2 (depends on 1) The system of claim 1, wherein the controller is configured to adjust a first gas flow rate of the first gas by adjusting the first valve and a second gas flow rate of the second gas by adjusting the second valve. ### Claim 3 (depends on 2) The system of claim 2, wherein the controller is configured to adjust a ratio between the first and second gas flow rates to adjust a spray angle of the solid fuel by adjusting the first valve, the second valve, or a combination thereof. ### Claim 4 (depends on 2) The system of claim 2, wherein the controller is configured to adjust a fuel flow rate of the solid fuel relative to the first gas flow rate, the second gas flow rate, or a combination thereof, by adjusting the fuel pump. ### Claim 5 (depends on 4) The system of claim 4, wherein the controller is configured to adjust the fuel flow rate, the first gas flow rate, or the second gas flow rate, in response to feedback from a combustion chamber. ### Claim 6 (depends on 5) The system of claim 5, wherein the feedback comprises gasifier feedback from the combustion chamber of a gasifier. ### Claim 7 (depends on 6) The system of claim 6, comprising the gasifier coupled to the solid fuel injector. ### Claim 8 (depends on 1) The system of claim 1, wherein the first gas passage is a first annular passage, and the second gas passage is a second annular passage. ### Claim 9 (depends on 1) The system of claim 1, wherein the fuel outlet, the first gas outlet, and the second gas outlet are disposed in a common plane. ### Claim 10 (depends on 1) The system of claim 1, wherein the solid fuel passage is a coal passage, the first gas passage is a first oxygen passage, and the second gas passage is a second oxygen passage. ### Claim 11 A system, comprising: a solid fuel injection controller configured to control a solid fuel flow rate of a solid fuel in a fuel direction from a solid fuel injector, wherein a fuel pump is fluidly coupled to a solid fuel passage disposed axially with respect to the solid fuel injector and communicatively coupled to the solid fuel injection controller, wherein the fuel pump is configured to direct the solid fuel into the solid fuel passage, a first gas flow rate of a first gas flowing in a first gas direction from the solid fuel injector through a first gas passage, wherein a first valve is fluidly coupled to the first gas passage and communicatively coupled to the solid fuel injection controller, and a second gas flow rate of a second gas flowing in a second gas direction from the solid fuel injector through a second gas passage, wherein a second valve is fluidly coupled to the second gas passage and communicatively coupled to the solid fuel injection controller, wherein the first gas passage is disposed concentrically surrounding the solid fuel passage, and the second gas passage is disposed concentrically surrounding the first gas passage, and wherein the solid fuel injector controller is configured provide the fuel direction axially with respect to the solid fuel injector by actuating the fuel pump, the solid fuel injector controller is configured to provide the first gas direction to concentrically surround the fuel direction by actuating the first valve, and the solid fuel injector controller is configured to provide the second gas direction to concentrically surround the first gas direction by actuating the second valve. ### Claim 12 (depends on 11) The system of claim 11, wherein the solid fuel injection controller is configured to adjust a ratio between the first and second gas flow rates to adjust a spray angle of the solid fuel exiting from the solid fuel injector by adjusting the first valve, the second valve, or a combination thereof. ### Claim 13 (depends on 11) The system of claim 11, wherein the solid fuel injection controller is configured to adjust the solid fuel flow rate relative to the first gas flow rate by adjusting the fuel pump, the first valve, or a combination thereof, or the second gas flow rate by adjusting the fuel pump, the second valve, or a combination thereof, to control breakup of the solid fuel. ### Claim 14 (depends on 13) The system of claim 13, wherein the solid fuel injection controller is configured to adjust the solid fuel flow rate, the first gas flow rate, or the second gas flow rate, in response to feedback from at least component of an integrated gasification combined cycle (IGCC) system. ### Claim 15 (depends on 11) The system of claim 11, wherein the solid fuel flow rate is a coal flow rate, the first gas flow rate is a first oxygen flow rate, and the second gas flow rate is a second oxygen flow rate, wherein the first gas direction is oriented at a first angle relative to the fuel direction, the second gas direction is oriented at a second angle relative to the fuel direction, and the second angle is at least approximately 5° greater than the first angle. ### Claim 16 A method, comprising: controlling a solid fuel flow rate of a solid fuel traversing a solid fuel passage in an axial fuel direction from a solid fuel injector by actuating a fuel pump; controlling a first gas flow rate of a first gas traversing a first gas passage in a first gas direction from the solid fuel injector, wherein the first gas direction is oriented at a first angle relative to the fuel direction by actuating a first valve fluidly coupled to the first gas passage, wherein the first gas passage is disposed concentrically surrounding the solid fuel passage; and controlling a second gas flow rate of a second gas traversing a second gas passage in a second gas direction from the solid fuel injector, wherein the second gas direction is oriented at a second angle relative to the fuel direction by actuating a second valve fluidly coupled to the second gas passage, wherein the second gas passage is disposed concentrically surrounding the first gas passage, and the first and second angles are different from one another. ### Claim 17 (depends on 16) The method of claim 16, comprising gasifying a spray of the solid fuel from the solid fuel injector. ### Claim 18 (depends on 16) The method of claim 16, comprising adjusting a first ratio between the solid fuel flow rate and the first gas flow rate to control breakup of the solid fuel, and adjusting a second ratio between the first and second gas flow rates to adjust a spray angle of the solid fuel exiting from the solid fuel injector. ### Claim 19 (depends on 16) The method of claim 16, comprising varying the solid fuel flow rate, the first gas flow rate, and the second gas flow rate from a start up condition to a steady state condition to a shutdown condition of a gasifier.