Abstract: A method and apparatus for preparing pulverized coal used in the production of synthesis gas combusted in gas turbines used in integrated gasification combined cycle power plants uses gas turbine exhaust gas to dry and convey pulverized coal from a pulverizer to a coal/gas separation device.

Abstract: A method and apparatus for preparing pulverized coal used in the production of synthesis gas combusted in gas turbines used in integrated gasification combined cycle power plants uses gas turbine exhaust gas to dry and convey pulverized coal from a pulverizer to a coal/gas separation device.

Abstract: A self cleaning port system and method provides for removal of ash deposits and build-up from around a port opening in a combustion device such as an industrial or utility furnace or boiler. The self cleaning port system includes a port structure for providing communication between a source of injected material and an interior portion of the combustion device. The port structure can be a burner for injecting fuel and air, an overfire air port, a flue gas recirculation port, a reburning port for injecting a reburning fuel, a pollutant emission control port for injecting NO.sub.x or SO.sub.2 reduction agents, or other types of ports. A blowing member such as a lance is disposed within or formed as part of the port structure and is configured to discharge a blowing medium so as to remove ash deposits adjacent to the port opening. The blowing medium is discharged from the blowing member such that the blowing medium is directed outwardly away from the port opening.

Abstract: A method and system for the use of waste coal fines to reduce nitrogen oxides emissions from a coal-fired cyclone boiler. A coal water slurry including waste coal fines is injected as a co-firing fuel into a cyclone barrel of the cyclone boiler to partially oxidize the coal water slurry in a central portion of the cyclone barrel where injected. This produces a reducing zone having reducing gas species that convert nitrogen oxides to diatomic nitrogen. The coal water slurry can alternatively be injected into the cyclone barrel from a secondary combustion air conduit. The evaporation of the water from the coal water slurry reduces the overall combustion temperature in the cyclone barrel, further reducing the production of nitrogen oxides.

Abstract: A method and system for the use of waste coal fines to reduce nitrogen oxides emissions from a coal-fired cyclone boiler. A coal water slurry including waste coal fines is injected as a co-firing fuel into a cyclone barrel of the cyclone boiler to partially oxidize the coal water slurry in a central portion of the cyclone barrel where injected. This produces a reducing zone having reducing gas species that convert nitrogen oxides to diatomic nitrogen. The coal water slurry can alternatively be injected into the cyclone barrel from a secondary combustion air conduit. The evaporation of the water from the coal water slurry reduces the overall combustion temperature in the cyclone barrel, further reducing the production of nitrogen oxides.