The invention relates ton attemperator. It has a pipe section (3) and a liner pipe section (4) arranged within the pipe section (3) and being attached thereto. The pipe section (3) has an internal wall surface (33) and the liner pipe section (4) has an external wall surface (43). The internal wall surface (33) and external wall surface (43) form a gap (6) between them. The pipe section (3) and liner pipe section (4) each has an inlet end (31, 41) for connection to a steam supply and an outlet end (32, 42) for steam. The attemperator is provided with water injection means (2) arranged for supplying water into the interior of the liner pipe section (4). The inlet end (31) of the liner pipe section (3) has an outwardly extending wall portion (44) forming an outer circumferential outer zone (45), which zone (45) may contact the internal wall surface (33) of the pipe section (3).

According to the invention there is provided a plurality of openings (47) arranged to allow steam to enter the space formed by the gap (6) between the internal wall surface (33) and the external wall surface (43).

The invention also relates to a use of the attemperator.

The invention relates ton attemperator. It has a pipe section (3) and a liner pipe section (4) arranged within the pipe section (3) and being attached thereto. The pipe section (3) has an internal wall surface (33) and the liner pipe section (4) has an external wall surface (43). The internal wall surface (33) and external wall surface (43) form a gap (6) between them. The pipe section (3) and liner pipe section (4) each has an inlet end (31, 41) for connection to a steam supply and an outlet end (32, 42) for steam. The attemperator is provided with water injection means (2) arranged for supplying water into the interior of the liner pipe section (4). The inlet end (31) of the liner pipe section (3) has an outwardly extending wall portion (44) forming an outer circumferential outer zone (45), which zone (45) may contact the internal wall surface (33) of the pipe section (3).

According to the invention there is provided a plurality of openings (47) arranged to allow steam to enter the space formed by the gap (6) between the internal wall surface (33) and the external wall surface (43).

The invention also relates to a use of the attemperator.

A desuperheater includes a ring body defining an axial flow path and one or more spray nozzle assemblies around the ring body. Each spray nozzle assembly is connected to a separate water manifold and steam manifold to provide cooling water and atomizing steam through the spray nozzle assemblies. A nozzle sleeve of each spray nozzle assembly has a solid, unitary body having first, second, and third fluid passages formed through the body. The first fluid passage is in fluid communication with the water manifold and with a first exit aperture formed in a second end of the body. The second fluid passage is in fluid communication with the steam manifold and with a second exit aperture formed in the second end of the body. The third fluid passage is in fluid communication with the steam manifold and with a third exit aperture formed in the second end of the body. The second and third exit apertures are positioned on opposite sides of the first exit aperture.

A spray nozzle assembly has a housing with a body and cap flange secure to the body to define a bore within the housing. A first aperture is formed through the body and intersects the bore and a second aperture is formed through the cap flange and intersects the bore. A nozzle sleeve is disposed within the bore and has a solid, unitary sleeve body. First and second fluid passages are formed through the sleeve body. The first fluid passage is in fluid communication with the first aperture and a first exit aperture in an end of the sleeve body. The second fluid passage is in fluid communication with the second aperture and second and third exit apertures in the end of the sleeve body, which are positioned on opposite sides of the first exit aperture. A portion of the second fluid passage surrounds the first fluid passage.

A method of operating a combined heat and power plant (10) (CHP plant) includes generating hot flue gas in a hot flue gas generator (12) and cooling the hot flue gas in a sequence of cooling steps to recover heat and to generate steam in a heat recovery steam generator (16) (HRSG). The HRSG (16) includes an HP steam evaporator (26) downstream of the hot flue gas generator (12) in which HP steam is generated and in which the hot flue gas is cooled, at least one HP steam superheater (20, 22) between the hot flue gas generator (12) and the HP steam evaporator (26) in which at least HP steam from the HP steam evaporator is superheated and in which the hot flue gas is cooled, and an MP steam superheater (24) upstream of the HP steam evaporator (26) in which MP steam is superheated by the hot flue gas and in which hot flue gas is cooled.

A nuclear power plant with a steam dump device and condenser for the nuclear power plant.

A nuclear power plant with a steam dump device and condenser for the nuclear power plant.

A steam supply system having a wet steam source and a steam separator disposed to separated wet steam into dry saturated steam and a saturated condensate. The dry saturated steam is heated in a superheater to produce superheated steam, while the saturated condensate is cooled in a subcooler to produced subcooled condensate with a target temperature selected to prevent immediate evaporation of the subcooled condensate when mixed with the superheated steam. The subcooled condensate is sprayed into a stream of superheated steam using spray nozzles and gradually evaporates downstream of the spray nozzles to produce process steam of a desired % quality. A cooling fluid passing through the subcooler is utilized to cool the saturated condensate. The flow rate of the cooling fluid through the subcooler can be utilized to achieve process steam of a desired % quality.

Disclosed herein are a spray nozzle for an attemperator and an attemperator including the spray nozzle. An attemperator according to an embodiment includes: a steam transfer pipe through which steam is transferred; a fixed pipe which is fixed to an outer surface of the steam transfer pipe; and a spray nozzle, which is coupled to the fixed pipe, disposed in the steam transfer pipe and configured to spray cooling water into the steam transfer pipe. The spray nozzle includes, on an outer circumferential surface thereof, at least one support that protrudes toward the fixed pipe. The spray nozzle is spaced apart from the fixed pipe.

Embodiments of the invention provide a desuperheater system for cooling a process fluid. The desuperheater system includes a pipe through which the process fluid flows and that defines an axis and includes injector housings attached to and arranged radially around the pipe. The injector housings each define an injector cavity. Injectors, each one including an injector nozzle that defines an injection angle, are received in each injector cavity so that the injector nozzles are in fluid communication with the process fluid. The injection angle of each injection nozzle is selected individually. The desuperheater system also includes a control valve with a valve inlet port configured to receive a cooling fluid. The control valve is configured to selectively provide fluid communication between the valve inlet port and at least one of the of injectors to inject the cooling fluid into the process fluid.