System and method for coupling coolant fluid conduit to feed injector tip

1. A system comprising:

a gasification feed injector, comprising:

a tip portion having a first threaded portion;

a coolant chamber disposed in the tip portion; and

a coolant fluid conduit having a second threaded portion, wherein the coolant fluid conduit is coupled to the tip portion adjacent the coolant chamber via threading of the second threaded portion into the first threaded portion

wherein the gasification feed injector comprises a sealant disposed on the first and second threaded portions, wherein the sealant is configured to block a fluid from leaking through a first interface of the first and second threaded portions out of the gasification feed injector.

2. The system of claim 1 , wherein the sealant comprises a ceramic cement.

3. The system of claim 1 , wherein the tip portion has a third threaded portion adjacent the coolant chamber, and the coolant fluid conduit has a fourth threaded portion, wherein the coolant fluid conduit is coupled to the tip portion adjacent the coolant chamber via threading of the fourth threaded portion into the third threaded portion.

4. The system of claim 3 , wherein the gasification feed injector comprises the sealant disposed on the third and fourth threaded portions, wherein the sealant is configured to block the fluid from leaking through a second interface of the third and fourth threaded portions out of the gasification feed injector.

5. The system of claim 4 , wherein the sealant comprises a ceramic cement.

6. The system of claim 1 , wherein the tip portion comprises an inner annular wall and an outer annular wall, and the outer annular wall includes the first threaded portion.

7. The system of claim 1 , wherein the first threaded portion is configured to expand towards the second threaded portion in response to heat to block fluid from leaking through the first interface of the first and second threaded portions out of the gasification feed injector.

8. The system of claim 7 , wherein the first threaded portion is configured to expand towards the second threaded portion in response to heat to compress the sealant between the first and second threaded portions and to block fluid from leaking through the first interface of the first and second threaded portions out of the gasification feed injector.

9. The system of claim 1 , comprising a gasifier having the gasification feed injector.

10. A system comprising:

a reaction chamber; and

a feed injector coupled to the reaction chamber, wherein the feed injector comprises:

a tip portion;

a fuel passage configured to inject a fuel through the tip portion; and

a coolant fluid conduit laterally coupled to the tip portion via a first threaded connection

wherein the tip portion has a first threaded portion and the coolant fluid conduit has a second threaded portion, the second threaded portion is coupled to the first threaded portion in a crosswise direction relative to a central axis of the feed injector to form the first threaded connection, and the tip portion extends circumferentially around the central axis, the first threaded portion extends radially into a side wall of the tip portion, and the second threaded portion is threaded into the first threaded portion.

11. The system of claim 10 , wherein the feed injector comprises a sealant disposed within the first threaded connection, wherein the sealant is configured to block fluid from leaking through the first threaded connection out of the feed injector.

12. The system of claim 11 , wherein the sealant comprises a ceramic cement.

13. The system of claim 10 , wherein the coolant fluid conduit is coupled laterally to the tip portion via a second threaded connection.

14. The system of claim 10 , wherein the feed injector comprises a coolant chamber disposed in the tip portion, and the coolant fluid conduit is coupled laterally to the tip portion adjacent the coolant chamber via the first threaded connection.

15. A method comprising:

providing a tip portion of a gasification feed injector, wherein the tip portion extends circumferentially around a central axis of the feed injector, and the tip portion has a first threaded portion;

providing a coolant fluid conduit having a second threaded portion;

threading the second threaded portion into the first threaded portion to secure the coolant fluid conduit to the tip portion; and

applying a sealant to the first threaded portion, the second threaded portion, or both, prior to threading the second threaded portion into the first threaded portion, wherein the sealant is configured to block a fluid from leaking through an interface of the first and second threaded portions.

16. The method of claim 15 , wherein the sealant comprises a ceramic cement.