Patent ID: 8561553

Claim:
A solid fuel nozzle tip for issuing a flow of mixed solid fuel and air to a boiler comprising: a) an outer nozzle body having an outer flow channel extending therethrough from an inlet to an outlet of the outer nozzle body; and b) an inner nozzle body having an inner flow channel extending therethrough from an inlet to an outlet of the inner nozzle body, the inner nozzle body being mounted within the outer nozzle body with the inner flow channel inboard of and substantially aligned with the outer flow channel, wherein the inner and outer nozzle bodies are joined together so as to accommodate movement relative to one another due to thermal expansion and contraction of the outer and inner nozzle bodies, wherein the inner and outer nozzle bodies are joined together by three pins to constrain the inner and outer nozzle bodies against relative rotation, but allow relative translation along the pins to accommodate movement of the inner and outer nozzle bodies relative to one another due to thermal expansion and contraction.