Abstract: A system includes a gasification fuel injector, which includes a first fuel conduit configured to inject a first fuel flow from a first fuel tip, a second fuel conduit configured to inject a second fuel flow from a second fuel tip, a first gas conduit configured to inject a first gas flow from a first gas tip, a second gas conduit configured to inject a second gas flow from a second gas tip, and a third gas conduit configured to inject a third gas flow from a third gas tip. At least one of the first fuel tip, the second fuel tip, the first gas tip, the second gas tip, or the third gas tip is recessed a distance away from an outlet of the gasification fuel injector. The first and second fuel conduits and the first, second, and third gas conduits are coaxial with one another.

Abstract: A system includes a gasification fuel injector. The gasification fuel injector includes a mixing device configured to mix together at least two of a solid stream, a liquid stream, or a gaseous stream, or a combination thereof, to generate a mixture. The mixing device is disposed upstream of a tip portion of the gasification fuel injector, and the mixture is discharged from the tip portion.

Abstract: A system includes a gasifier configured to gasify a gasification fuel during a gasification mode. The system also includes a first injector configured to inject a heat control fuel and an oxygen enriched air into the gasifier for combustion during a heat control mode. The heat control fuel is the same or different from the gasification fuel, and the oxygen enriched air includes air enriched with additional oxygen.

Abstract: A system includes a gasifier injector configured to inject a heat control fuel and a mixed air into a gasifier for combustion during a heat control mode. The heat control fuel is the same or different from the gasification fuel, and the system is configured to create the mixed air from independent supplies of oxygen and nitrogen.

Abstract: A throat plug for a gasifier vessel includes at least one first cavity being receptive to at least one device located in the at least one first cavity, and at least one second cavity being receptive to a fuel injector.

Abstract: Methods and systems for a feed injector are provided. The feed injector includes a first annular channel defined in the feed injector. The first annular channel includes a first end, an arcuate portion and a second end. The arcuate portion is between the first and second ends, and the first annular channel is oriented substantially concentrically about a longitudinal axis of the feed injector. The arcuate portion is oriented to discharge a fluid flowing through the first annular channel radially outward with respect to the longitudinal axis. The feed injector also includes a second annular channel including a first end, an arcuate portion, and a second end, wherein the arcuate portion is between the first and second ends. The second annular channel circumscribes the first annular channel, and the second annular channel first end is positioned radially outward and downstream from the first annular channel first end.

Abstract: A system includes a gasifier configured to gasify a gasification fuel during a gasification mode. The system also includes a first injector configured to inject a heat control fuel and an oxygen enriched air into the gasifier for combustion during a heat control mode. The heat control fuel is the same or different from the gasification fuel, and the oxygen enriched air includes air enriched with additional oxygen.

Abstract: A system includes a gasifier injector configured to inject a heat control fuel and a mixed air into a gasifier for combustion during a heat control mode. The heat control fuel is the same or different from the gasification fuel, and the system is configured to create the mixed air from independent supplies of oxygen and nitrogen.

Abstract: A system includes a gasification fuel injector. The gasification fuel injector includes a mixing device configured to mix together at least two of a solid stream, a liquid stream, or a gaseous stream, or a combination thereof, to generate a mixture. The mixing device is disposed upstream of a tip portion of the gasification fuel injector, and the mixture is discharged from the tip portion.

Abstract: A method of assembling a feed injector is provided. The method includes providing a feed injector tip that includes an inlet, a tip end, a flow passage that extends longitudinally through the feed injector tip from the inlet to the tip end, an annular cooling channel that substantially circumscribes the flow passage, and a buffer region that separates the annular cooling channel from the flow passage. The method further includes coupling the feed injector tip to the feed injector to enable a fluid to be channeled through the flow passage, such that the fluid flows past the inlet, at which the buffer region has a first width, before flowing past the tip end, at which the buffer region has a second width, the first width wider than the second width, and coupling a cooling assembly to the feed injector to enable a flow of cooling fluid to be channeled into the annular cooling channel.

Abstract: A system includes a gasification fuel injector, which includes a first fuel conduit configured to inject a first fuel flow from a first fuel tip, a second fuel conduit configured to inject a second fuel flow from a second fuel tip, a first gas conduit configured to inject a first gas flow from a first gas tip, a second gas conduit configured to inject a second gas flow from a second gas tip, and a third gas conduit configured to inject a third gas flow from a third gas tip. At least one of the first fuel tip, the second fuel tip, the first gas tip, the second gas tip, or the third gas tip is recessed a distance away from an outlet of the gasification fuel injector. The first and second fuel conduits and the first, second, and third gas conduits are coaxial with one another.

Abstract: An injector tip for a nozzle includes a center body having a plurality of center body openings at a distal end configured to inject a fuel flow into a combustion zone of a combustor. One or more fuel passages are arranged around the center body and are configured to inject a fuel slurry into the combustion zone. One or more oxygen passages are arranged around the center body and are configured to inject an oxygen flow into the combustion zone.

Abstract: A method of assembling a feed injector is provided. The method includes providing a feed injector tip that includes an inlet, a tip end, a flow passage that extends longitudinally through the feed injector tip from the inlet to the tip end, an annular cooling channel that substantially circumscribes the flow passage, and a buffer region that separates the annular cooling channel from the flow passage. The method further includes coupling the feed injector tip to the feed injector to enable a fluid to be channeled through the flow passage, such that the fluid flows past the inlet, at which the buffer region has a first width, before flowing past the tip end, at which the buffer region has a second width, the first width wider than the second width, and coupling a cooling assembly to the feed injector to enable a flow of cooling fluid to be channeled into the annular cooling channel.

Abstract: A refractory brick and mortar joint comprise a cold face of the refractory brick; a hot face of the refractory brick opposite the cold face, wherein the hot face is shorter in length than the cold face; and at least one tapered mortar joint extending from the hot face to the cold face, wherein the at least one tapered mortar joint is thicker at the hot face of the refractory brick than at the cold face of the refractory brick. A refractory brick comprises a cold face; a hot face opposite the cold face, wherein the hot face is shorter in length than the cold face; and at least one surface extending from the cold face to the hot face, wherein the at least one surface is angled to accommodate the difference in length between the cold face and the hot face.

Abstract: A fuel injector for injecting fuel into a gasifier includes a mating end including a nozzle portion and a first flange fixedly coupled to the mating end and having a first receiving hole there through and including a first diaphragm disposed therein. The injector also includes a fuel transmission nozzle displaced at least partially within the mating end and passing through the first receiving hole arranged and configured such that a secondary oxygen channel exists between the fuel transmission nozzle and the mating end, the fuel transmission nozzle being fixedly coupled to the first diaphragm and further including a fuel inlet for receiving fuel for introduction into the gasifier.

Abstract: A Pelton turbine is disclosed that includes at least one needle valve injector assembly and at least one high efficiency injector assembly. The high efficiency injector assembly provides a generally unimpeded flow path for water from a distributor to a runner of the turbine. The high efficiency injector assemblies and needle valve injector assemblies are operated in cooperation to provide the overall desired flow rate through the turbine and to increase the efficiency of the turbine. A high efficiency injector assembly may be retrofitted for a needle valve injector assembly to improve the efficiency of existing turbine systems.

Abstract: Methods and systems for a feed injector are provided. The feed injector includes a first annular channel defined in the feed injector. The first annular channel includes a first end, an arcuate portion and a second end. The arcuate portion is between the first and second ends, and the first annular channel is oriented substantially concentrically about a longitudinal axis of the feed injector. The arcuate portion is oriented to discharge a fluid flowing through the first annular channel radially outward with respect to the longitudinal axis. The feed injector also includes a second annular channel including a first end, an arcuate portion, and a second end, wherein the arcuate portion is between the first and second ends. The second annular channel circumscribes the first annular channel, and the second annular channel first end is positioned radially outward and downstream from the first annular channel first end.

Abstract: Nozzles having variable geometry are disclosed that are comprised of a plurality of vanes that contact one another and can slide with respect to one another. A control element forces the vanes to slide, with contacting sides of the vanes defining an inner flow path through which a fluid may pass. The vanes may be self-similar or different from one another to define the desired geometries of the opening in the nozzles. The vanes may be configured to provide convergent, divergent and convergent-divergent nozzles for a range of applications.

Abstract: A fuel injector for injecting fuel into a gasifier includes a mating end including a nozzle portion and a first flange fixedly coupled to the mating end and having a first receiving hole there through and including a first diaphragm disposed therein. The injector also includes a fuel transmission nozzle displaced at least partially within the mating end and passing through the first receiving hole arranged and configured such that a secondary oxygen channel exists between the fuel transmission nozzle and the mating end, the fuel transmission nozzle being fixedly coupled to the first diaphragm and further including a fuel inlet for receiving fuel for introduction into the gasifier.

Abstract: A fuel injector is provided. The fuel injector includes a nozzle, a cooling assembly, and a tip coupled to the nozzle. The tip includes a base including a cooling channel defined therein, a first transition member extending outwardly from the base and in flow communication with the cooling channel, and a second transition member extending outwardly from the base and in flow communication with the cooling channel, wherein the base, the first transition member, and the second transition member are formed integrally together. The tip is configured to couple to the cooling assembly to channel a flow of cooling fluid through the cooling channel via the first transition member and the second transition member.