Patent ID: 6276611
Filing Date: 2001-08-21
Classification: C10J,F23D

Abstract:
A method of protecting a fuel injector nozzle having a fuel injector body with an upstream end and a downstream end, at least two conduits extending from the upstream end to the downstream end to permit segregated flow of a stream of oxygen containing gas and a stream of carbonaceous fuel from the downstream end, the downstream end of the fuel injector nozzle having an outlet orifice and a downstream end surface, said method comprisinga) forming an annular recess in a portion of the downstream end surface,b) disposing a refractory insert in the annular recess such that the refractory insert does not project beyond the downstream end surface and does not cover the downstream end surface alongside the annular recess, and,c) securing the refractory insert in the annular recess to prevent the refractory insert from falling away from the annular recess when the fuel injector nozzle is positioned such that the downstream end surface faces a downward direction.