Abstract: A fuel flow path and a flow path of air for combustion are disposed coaxially to create a coaxial jet such that a fuel flow is embraced by an air flow. A large number of such fuel flow paths and air flow paths are arranged in a wall surface of a combustion chamber to create coaxial nozzle jets. Some of the flow paths of air for combustion are arranged inclinedly so as to create rotation for the stabilization of combustion and straight portions not having an inclination angle are added respectively to upstream ends of such inclined air flow paths. Fuel is jetted toward or within the straight portions.

Abstract: A burner is provided that has high flame stability and reduces NOx emissions. In the burner, air holes of an air hole member have a central axis inclined relative to a burner central axis. The leading end portion of a first fuel nozzle is configured to be able to suppress turbulence of air-flow flowing on the outer circumference side of the first fuel nozzle. The tip of the first fuel nozzle is located on a fuel jetting-out directional downstream side of the inlet of the fuel hole. The tip of the second fuel nozzle is located on a fuel jetting-out directional downstream side of the air hole inlet.

Abstract: A combustor includes a chamber mixing and burning fuel and air and an air hole plate disposed on a wall surface of the chamber. The air hole plate includes a plurality of rows disposed concentrically of a plurality of air holes jetting coaxial jets of fuel and air into the chamber. A first fuel nozzle and a second fuel nozzle are disposed near a fuel hole for jetting fuel into an air hole row on an inner peripheral side. The first fuel nozzle is structured to suppress turbulence of surrounding air flow and the second fuel nozzle is structured to promote turbulence of a surrounding air flow. In accordance with the aspect of the present invention, good flame stability can be maintained while further reducing NOx in a combustor using coaxial jets.

Abstract: Combustion equipment of a coaxial jet combustion scheme is provided that includes: a burner plate in which fuel and air are mixed with each other while the fuel and air pass through an air hole; a burner plate extension which is a portion of the burner plate and extends toward a combustion chamber side spaced apart from the air hole; and a protrusion disposed on the combustion chamber side of the burner plate extension so as to protrude in a direction where flow of the fuel moves. In the combustion equipment, a gap between opposite portions of the protrusion is greater than a diameter of the air hole and a flame source forming area is defined between the burner plate, the burner plate extension and the protrusion. The combustion equipment of a coaxial jet combustion scheme can achieve a further reduction in NOx emissions.

Abstract: A waste-to-energy incineration system, in which the amount and heat value of exhaust gas largely changes in long and short periods, comprises an incinerator for burning waste, a boiler in the incinerator for generating steam with exhaust heat generated by the incinerator, a superheater for superheating steam generated in the boiler, a steam turbine driven by steam superheated by the superheater, a generator driven by the steam turbine, a fuel reformer for reforming source fuel, and a combustor burning fuel gas reformed by the fuel reformer and at least a part of exhaust gas led from the incinerator which is able to stably decompose generated dioxin in waste incineration exhaust gas.

Abstract: A waste-to-energy incineration system, in which the amount and the heat value of exhaust gas largely changes in long and a short periods, comprises an incinerator for burning waste, a boiler in the incinerator for generating steam with exhaust heat generated by the incinerator, a superheater for superheating steam generated in the boiler, a steam turbine driven by steam superheated by the superheater, a generator driven by the steam turbine, a fuel reformer for reforming source fuel, and a combustor burning fuel gas reformed by the fuel reformer and at least a part of exhaust gas led from the incinerator which is able to stably decompose generated dioxin in waste incineration exhaust gas.

Abstract: A waste-to-energy incineration system, in which the amount and the heat value of exhaust gas largely changes in a long and a short periods, comprises an incinerator for burning waste, a boiler in the incinerator for generating steam with exhaust heat generated by the incinerator, a superheater for superheating steam generated in the boiler, a steam turbine driven by steam superheated by the superheater, a generator driven by the steam turbine, a fuel reformer for reforming source fuel, and a combustor burning fuel gas reformed by the fuel reformer and at least a part of exhaust gas led from the incinerator which are able to stably decompose generated dioxin, whereby it becomes possible to stably and almost completely decompose dioxin in waste incineration exhaust gas.

Abstract: A waste-to-energy incineration system, in which the amount and the heat value of exhaust gas largely changes in a long and a short periods, comprises an incinerator for burning waste, a boiler in the incinerator for generating steam with exhaust heat generated by the incinerator, a superheater for superheating steam generated in the boiler, a steam turbine driven by steam superheated by the superheater, a generator driven by the steam turbine, a fuel reformer for reforming source fuel, and a combustor burning fuel gas reformed by the fuel reformer and at least a part of exhaust gas led from the incinerator which are able to stably decompose generated dioxin, whereby it becomes possible to stably and almost completely decompose dioxin in waste incineration exhaust gas.

Abstract: A waste-to-energy incineration system, in which the amount and heat value of exhaust gas largely changes in long and short periods, comprises an incinerator for burning waste, a boiler in the incinerator for generating steam with exhaust heat generated by the incinerator, a superheater for superheating steam generated in the boiler, a steam turbine driven by steam superheated by the superheater, a generator driven by the steam turbine, a fuel reformer for reforming source fuel, and a combustor burning fuel gas reformed by the fuel reformer and at least a part of exhaust gas led from the incinerator which is able to stably decompose generated dioxin in waste incineration exhaust gas.

Abstract: A waste-to-energy incineration system, in which the amount and the heat value of exhaust gas changes during operation, includes an incinerator for burning waste, a boiler in the incinerator for generating steam with exhaust heat generated by the incinerator, and a superheater for superheating steam generated in the boiler. A steam turbine is provided which is driven by steam superheated by the superheater and a generator is driven by the steam turbine. A fuel reformer is provided for reforming source fuel. A combustor burning fuel gas reformed by the fuel reformer and at least a part of exhaust gas fed from the incinerator is provided which decomposes generated dioxin in waste incineration exhaust gas.

Abstract: A waste-to-energy incineration system, in which the amount and heat value of exhaust gas largely changes in long and short periods, comprises an incinerator for burning waste, a boiler in the incinerator for generating steam with exhaust heat generated by the incinerator, a superheater for superheating steam generated in the boiler, a steam turbine driven by steam superheated by the superheater, a generator driven by the steam turbine, a fuel reformer for reforming source fuel, and a combustor burning fuel gas reformed by the fuel reformer and at least a part of exhaust gas led from the incinerator which is able to stably decompose generated dioxin in waste incineration exhaust gas.

Abstract: A cylindrical fuel reforming apparatus covered with a thermal insulating layer 16 comprises a fuel flow passage 1 contoured by a cylindrical contour wall 2 in its central axial direction and a reforming catalyst bed 3 in the middle of the flow passage for reforming gas to be reformed flowing from the upstream of the fuel flow passage 1 into a proper reformed gas. A cooling jacket 10 is arranged in the upstream of the reforming catalyst bed 3 so as to surround the fuel flow passage 1 and to be supplied with steam 11 for cooling the cylindrical contour wall 2. There are provided in the cylindrical contour wall 2 in the upstream of the reforming catalyst bed 3 a plurality of injection nozzles 15 communicating the cooling jacket 10 with the fuel flow passage 1 so that the steam 11 introduced into the cooling jacket 10 is allowed to flow into the fuel flow passage 1.

Abstract: A cylindrical fuel reforming apparatus covered with a thermal insulating layer 16 comprises a fuel flow passage 1 contoured by a cylindrical contour wall 2 in its central axial direction and a reforming catalyst bed 3 in the middle of the flow passage for reforming gas to be reformed flowing from the upstream of the fuel flow passage 1 into a proper reformed gas. A cooling jacket 10 is arranged in the upstream of the reforming catalyst bed 3 so as to surround the fuel flow passage 1 and to be supplied with steam 11 for cooling the cylindrical contour wall 2. There are provided in the cylindrical contour wall 2 in the upstream of the reforming catalyst bed 3 a plurality of injection nozzles 15 communicating the cooling jacket 10 with the fuel flow passage 1 so that the steam 11 introduced into the cooling jacket 10 is allowed to flow into the fuel flow passage 1.

Abstract: A cylindrical fuel reforming apparatus covered with a thermal insulating layer 16 has a fuel flow passage 1 contoured by a cylindrical contour wall 2 in its central axial direction, and a reforming catalyst bed 3 is disposed in the middle of the flow passage for reforming gas, flowing from the upstream end of the fuel flow passage 1, into a proper reformed gas. A cooling jacket 10 is arranged upstream of the reforming catalyst bed 3 so as to surround the fuel flow passage 1 and the cooling jacket is supplied with steam 11 for cooling the cylindrical contour wall 2. There are provided in the cylindrical contour wall 2 upstream of the reforming catalyst bed 3 a plurality of injection nozzles 15 for effecting communication between the cooling jacket 10 and the fuel flow passage 1 so that the steam 11 introduced into the cooling jacket 10 is allowed to flow into the fuel flow passage 1.

Abstract: An apparatus for mixing gaseous fuel and air for combustion, particularly premixing-type combustion in a gas turbine, has a conduit providing a passage for flow of the air with a reverse bend defined by opposed first and second wall portions that bound respectively the outside and the inside of said reverse bend as seen in a longitudinal section. The reverse bend establishes a flow region of air having a velocity gradient extending transversely across the conduit from a high velocity zone adjacent the first side wall portion at the outside of the reverse bend to a low velocity zone. Injection means for the gaseous fuel injects the fuel from the first side wall portion into the high velocity zone with a velocity component transverse to the air flow and in a direction towards the low velocity zone. Rapid and uniform mixing is obtained.

Abstract: A premixed combustor for a gas turbine, comprises, a combustion chamber for burning a fuel with an air therein, at least two premixed fuel/air mixture outlets which are juxtaposed with each other, and through each of which a premixed fuel/air mixture flows out into the combustion chamber, and a flow deflection member arranged between the premixed fuel/air mixture outlets, urging the permixed fuel/air mixture from one of the premixed fuel/air mixture outlets to go away from another one of the premixed fuel/air mixture outlets, and terminating in the combustion chamber so that the premixed fuel/air mixture from the one of the premixed fuel/air mixture outlets is permitted to move toward the premixed fuel/air mixture flowing out from the another one of the premixed fuel/air mixture outlets after going away from the another one of the premixed fuel/air mixture outlets.

Abstract: A reactor system of a boiling water type atomic power plant including a reactor pressure vessel, a primary containment vessel containing the reactor pressure vessel, a main turbine, a main steam piping extending through the primary containment vessel between the reactor pressure vessel and the main turbine, and inside and outside main steam isolation valves provided on the main steam piping inside and outside the primary containment vessel, respectively. A closure valve is provided on the main steam piping at a position near the primary containment vessel and is adapted to quickly close in less than 3 seconds upon a break accident of the main steam piping. A volume of the reactor pressure vessel allotted for accommodating steam is correspondingly enlarged to allow the closure valve to quickly close upon a break accident of the main steam piping.

Abstract: A natural circulation type boiling light-water reactor comprises a pressure vessel, a reactor core disposed within said pressure vessel to heat light water so as to generate main steam, a steam outlet provided in a wall of said pressure vessel for drawing out the main steam therethrough to supply the same to a turbine system, and a steam path along which the main steam flows from the reactor core to the steam outlet. The reactor further comprises a steam guide for prolonging the steam path and/or a radially increased chimney for reducing the velocity of the main steam flowing through the steam path. These causes radioactive isotope .sup.16 N contained in the main steam to flow within the pressure vessel for a time period exceeding its own half-life, so that the inventory of .sup.16 N in the main steam directed towards the turbine system is reduced remarkably. In consequence, shield structures for piping and turbine systems can be reduced in size and weight.

Abstract: A fuel reforming apparatus includes a reaction tube for causing endothermic reaction for converting a fuel gas with hydrocarbon, steam, and the like mixed therein into a hydrogen-enriched gas using a catalyst, a combustor for generating a combustion gas for heating the reaction tube, a heat insulating layer for preventing the radiation of the combustion gas, and a combustion gas passage disposed around the reaction tube and allowing the combustion gas to flow therethrough, and a passage for air or fuel gas disposed around the fuel gas passage, a heat insulating layer being disposed around the outer peripheral surface of this passage.

Abstract: A fuel reforming apparatus includes a reaction tube for causing endothermic reaction for converting a fuel gas with hydrocarbon, steam, and the like mixed therein into a hydrogen-enriched gas using a catalyst, a combustor for generating a combustion gas for heating the reaction tube, a heat insulating layer for preventing the radiation of the combustion gas, and a combustion gas passage disposed around the reaction tube and allowing the combustion gas to flow therethrough, and a passage for air or fuel gas disposed around the fuel gas passage, a heat insulating layer being disposed around the outer peripheral surface of this passage.