Coal gasification feed injector shield with oxidation-resistant insert

A feed injector for injecting a fluidized fuel and an oxidizing material into a high temperature combustion chamber, the feed injector comprising:

• an injector nozzle, defining an axial bore opening, and comprised of at least two concentric nozzle shells and an outer cooling jacket, the outer cooling jacket defining a substantially planar annular end face and an annular nozzle lip;
• at least one threaded projection, extending from the end face;
• a substantially planar heat shield, having an upper surface, a lower surface, and an inner surface, the inner surface defining a center hole;
• an annular threaded channel, on the upper surface of the heat shield, adapted to rotatably receive the at least one threaded projection, to thereby affix the heat shield to the end face of the injector nozzle;
• and
• an annular, oxidation-resistant insert, positioned concentrically over the nozzle lip, between the nozzle lip and the inner surface of the heat shield.