Coal gasification feed injector shield with oxidation-resistant insert
AssigneeEastman Chemical Company
InventorsGary Scott Whittaker, James Wesley Adams
Life of this patent
Estimating the term…
Abstract
A coal gasification feed injector is disclosed having an oxidation-resistant insert which prevents oxidative corrosion of the shield, and the subsequent damage to the underlying face of the feed injector. The life of the feed injector, and thus the length of a single gasification campaign, is thereby extended.
Claims13
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,
- wherein the oxidation-resistant insert is held in place on the nozzle lip solely by the heat shield.
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,
- wherein the oxidation-resistant insert is held in place on the nozzle lip by the inner surface of the heat shield,
- further comprising:
- an annular barrier, extending from the end face of the injector nozzle, positioned interior to the at least one threaded projection with respect to the axial bore opening;
- and
- an annular groove, provided in the upper surface of the heat shield, adapted to receive the annular barrier.
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,
- wherein the oxidation-resistant insert is held in place on the nozzle lip by affixing the heat shield to the end face of the injector nozzle, further comprising:
- an annular barrier, extending from the end face of the injector nozzle, positioned interior to the at least one threaded projection with respect to the axial bore opening;
- and
- an annular groove, provided in the upper surface of the heat shield, adapted to receive the annular barrier.
Dependencies are inferred from the claim text.