Systems and methods for feedstock injection

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.

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.