Multi-stream feed injector

1. A feed injector system, comprising:

an inner channel having a converging tip configured to convey a liquid reactant or moderator to a reaction zone;

a first oxidizer channel having a converging tip, the first oxidizer channel extending around the inner channel, wherein the first oxidizer channel is configured to convey a first oxidizer stream to the reaction zone;

a second oxidizer channel extending around the first oxidizer channel, wherein the second oxidizer channel is configured to convey a second oxidizer stream to the reaction zone; and

a third channel extending around the inner channel and the first and second oxidizer channels, comprising a divergent tip, wherein the third channel is configured to convey a solid fuel feed to the reaction zone.

2. The feed injector system of claim 1 , comprising:

a third oxidizer channel extending around the third channel, wherein the third oxidizer channel is configured to convey a third oxidizer stream to the reaction zone.

3. The feed injector system of claim 2 , wherein the third oxidizer channel comprises a swirl vane configured to impart angualr momentum to the thrid oxidizer stream.

4. The feed injector system of claim 1 , wherein the inner channel comprises a circular inner channel.

5. The feed injector system of claim 1 , wherein at least one terminal end of at least one tip of the feed injector system is retracted relative to an adjacent terminal end of an adjacent tip.

6. The feed injector system of claim 1 , wherein at least one of the channels of the feed injector system comprises a swirl vane.

7. The feed injector system of claim 6 , wherein the second oxidizer channel comrpises the swirl vane and the swirl vane is configured to impart angular momentum to the second oxidizer stream.

8. The feed injector system of claim 1 , wherein the second oxidizer channel comprises a diverging tip configuration, configured to direct the second oxidizer stream radially outward away from an axis of symmetry of the feed injector system.

9. A feed injector system, comprising:

a central channel configured to convey at least one of a solid fuel feed or a liquid reactant or moderator to a reaction zone;

an annular oxidizer channel extending around the central channel, wherein the oxidizer channel is configured to receive a main oxidizer stream and to divide the main oxidizer stream into first and second oxidizer sub-streams via a selectively installable insert disposed in the annular oxidizer channel; and

a second annular channel extending around the central channel and the annular oxidizer channel, wherein the second channel is configured to convey at least one of the solid fuel feed or the liquid reactant to the reaction zone.

10. The feed injector system of claim 9 , wherin at least one of the channels of the feed injector system comprises a swirl vane.

11. The feed injector system of claim 9 , wherein the selectively installable insert is configured to direct the first oxidizer sub-stream toward an axis of symmetry of the feed injector system.

12. The feed injector system of claim 11 , wherein the selectively installable insert is configured to direct the second oxidizer sub-stream away from the axis of symmetry of the feed injector system.

13. The feed injector system of claim 9 , wherein at least one terminal end of at least one tip of the feed injector system is retrated relative to an adjacent terminal end of an adjacent tip.

14. A feed injector system, comprising:

an inner channel having a converging tip configured to convey at least one of a solid fuel feed or a liquid reactant or a moderator to the reaction zone;

a first oxidizer channel having a converging tip, the first oxidizer channel extending around the inner channel, wherein the first oxidizer channel is configured to convey a first oxidizer stream to the reaction zone;

a second oxidizer channel having a diverging tip, the second oxidizer channel extending around the first oxidizer channel, wherein the second oxidizer channel is configured to convey a second oxidizer stream to the reaction zone; and

a third channel having a divergent tip, the third channel extending around the inner channel and the first and second oxidizer channels, wherein the third channel is configured to convey at least one of the solid fuel feed or the liquid reactant or moderator to a reaction zone.

15. The feed injector system of claim 14 , wherein the inner channel is configured to convey the liquid reactant or moderator, and the third annual channel is configured to convey the solid fuel feed.

16. The feed injector system of claim 14 , wherein the inner channel is configured to convey the solid fuel feed and the third channel is configured to convey the liquid reactant or moderator.

17. The feed injector system of claim 14 , comprising at least one of a swirl vane disposed inside the first oxidizer channel, wherein the swirl vane is configured to impart angular momentum to the first oxidizer stream or a swirl vane disposed inside the second oxidizer channel where the swirl vane is configured to impart angular momentum to the second oxidizer stream.

18. The feed injector system of claim 14 , comprising at least one of a swirl vane disposed inside the second oxidizer channel, wherein the swirl vane is configured to impart angular momentum to the second oxidizer stream, or a swirl vane disposed inside the first oxidizer channel, wherein the swirl vane is configured to impart angular momentum to the first oxidizer stream.

19. The feed injector system of claim 14 , comprising a fourth channel extending around the inner channel, the first and second oxidizer channels, and the third channel, wherein the fourth channel is configured to convey a third oxidizer stream to the reaction zone;

and a swirl vane disposed inside the third oxidizer channel, wherein the swirl vane is configured to impart angular momentum to the third oxidizer stream.