IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0125211
(2002-04-18)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
31 |
초록
▼
A coal gasification nozzle is disclosed having a barrier, integral with the face of the injector, that fits into a groove of a heat shield attached to the nozzle face. The barrier prevents oxidative corrosion of the shield, and subsequent damage to the underlying face of the feed injector, by preven
A coal gasification nozzle is disclosed having a barrier, integral with the face of the injector, that fits into a groove of a heat shield attached to the nozzle face. The barrier prevents oxidative corrosion of the shield, and subsequent damage to the underlying face of the feed injector, by preventing diffusion of corrosive species to the threaded ring by which the heat shield is attached to the face of the nozzle. The life of the injector, and thus the length of any single gasification campaign, is thereby extended.
대표청구항
▼
1. 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 cooli
1. 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;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; andan annular groove, provided in the upper surface of the heat shield, adapted to receive the annular barrier. 2. The feed injector according to claim 1, wherein the annular barrier is provided with a lower portion thereof, and the annular groove is provided with a bottom portion, and wherein the lower portion of the annular barrier contacts the bottom portion of the annular groove when the heat shield is affixed to the end face of the injector nozzle. 3. The feed injector according to claim 1, wherein the threaded projection comprises a ring having an inner surface and an outer surface, at least one of which inner and outer surfaces is threaded. 4. The feed injector according to claim 1, wherein the at least one threaded projection comprises a plurality of threaded projections. 5. The feed injector according to claim 1, wherein the heat shield comprises a material having a high coefficient of thermal conductivity. 6. The feed injector according to claim 5, wherein the material having a high coefficient of thermal conductivity is at least one member selected from the group consisting of silicon nitride, silicon carbide, a zirconia-based ceramic, molybdenum, tungsten, and tantalum.
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