A boiler includes an upper steam drum, an optional intermediate drum, and a lower drum. Each drum is divided by an internal divider into a clean section and a concentrated section. Downcomers connect the upper steam drum to the lower drum, and tubes are connected to convey a heated steam-water mixture from the lower drum into the upper steam drum (through the optional intermediate drum, if provided). An optional superheater has an input terminal connected to receive steam from the clean section of the upper steam drum. An attemperator may be provided to attemperate superheated steam output from an output terminal of the superheater, and the attemperation fluid may optionally be provided from the concentrated side of the upper steam drum.

A boiler includes an upper steam drum, an optional intermediate drum, and a lower drum. Each drum is divided by an internal divider into a clean section and a concentrated section. Downcomers connect the upper steam drum to the lower drum, and tubes are connected to convey a heated steam-water mixture from the lower drum into the upper steam drum (through the optional intermediate drum, if provided). An optional superheater has an input terminal connected to receive steam from the clean section of the upper steam drum. An attemperator may be provided to attemperate superheated steam output from an output terminal of the superheater, and the attemperation fluid may optionally be provided from the concentrated side of the upper steam drum.

A resistance point welding apparatus for fixing a turbulence installation body to an inner wall of a steam generator pipe, having a welding head, which is introduced into the pipe and includes a lance having an electrically conductive material, a point welding electrode, which projects out of the lance in the radial direction, an effective element and an insulation body, which is opposite the point welding electrode in the radial direction and is moved by the effective element, is provided. The lance is tapered at a defined distance from the welding head end such that the insulation body and the point welding electrode press the turbulence installation body against the inner wall of the pipe when the effective element is activated. When a welding stream is impressed on the lance, a point-like welding stream flows via the point welding electrode to a counter electrode arranged outside the pipe.

A resistance point welding apparatus for fixing a turbulence installation body to an inner wall of a steam generator pipe, having a welding head, which is introduced into the pipe and includes a lance having an electrically conductive material, a point welding electrode, which projects out of the lance in the radial direction, an effective element and an insulation body, which is opposite the point welding electrode in the radial direction and is moved by the effective element, is provided. The lance is tapered at a defined distance from the welding head end such that the insulation body and the point welding electrode press the turbulence installation body against the inner wall of the pipe when the effective element is activated. When a welding stream is impressed on the lance, a point-like welding stream flows via the point welding electrode to a counter electrode arranged outside the pipe.

This collecting apparatus collects foreign matter mixed in condensate in/from a condenser of a steam turbine plant, and comprises a first foreign matter collector and an in-condenser collector. The first foreign matter collector is provided on an upstream side of a condensate pump in a pipe connecting a drain outlet provided to the bottom portion of the condenser and the condensate pump to each other, has an opening having a first dimension, and collects foreign matter while passing the condensate therethrough. The in-condenser collector is provided inside the condenser, has an opening having a second dimension larger than the first dimension, and collects foreign matter while passing the condensate in the condenser therethrough toward the drain outlet.

A heat transfer system includes a plenum configured to provide a secondary side fluid such as feedwater to a plurality of heat transfer tubes from a primary side fluid, and a tube sheet coupled to the plurality of heat transfer tubes. An orifice plate is mounted within the plenum and located adjacent to the tube sheet, and one or more orifice devices are supported by the orifice plate and are configured for insertion into or sealing against the plurality of heat transfer tubes. The one or more orifice devices may include center flow orifices, and/or rectangular or helical shaped transition stepped annular flow orifices, and an insertion of a number of the transition steps into the plurality of heat transfer tubes may determine a corresponding pressure drop of the secondary side fluid in the heat transfer system.

A heat transfer system includes a plenum configured to provide a secondary side fluid such as feedwater to a plurality of heat transfer tubes from a primary side fluid, and a tube sheet coupled to the plurality of heat transfer tubes. An orifice plate is mounted within the plenum and located adjacent to the tube sheet, and one or more orifice devices are supported by the orifice plate and are configured for insertion into or sealing against the plurality of heat transfer tubes. The one or more orifice devices may include center flow orifices, and/or rectangular or helical shaped transition stepped annular flow orifices, and an insertion of a number of the transition steps into the plurality of heat transfer tubes may determine a corresponding pressure drop of the secondary side fluid in the heat transfer system.

The present invention relates to a steam generator system (1000), a control method and a household appliance. The steam generator system (1000) comprises: a steam generator (100) comprising a housing (1) having a water inlet (13) and a steam outlet (14), and a heating element (3) provided in the housing (1); a water pump (300) connected between a water tank (200) and the water inlet (13); a water softener (400), wherein the water tank (200), the water pump (300) and the water inlet (13) are in communication with each other to form a water inlet pipeline, and the water softener (400) is connected to the water inlet pipeline in series.

This collecting apparatus collects foreign matter mixed in condensate in/from a condenser of a steam turbine plant, and comprises a first foreign matter collector and an in-condenser collector. The first foreign matter collector is provided on an upstream side of a condensate pump in a pipe connecting a drain outlet provided to the bottom portion of the condenser and the condensate pump to each other, has an opening having a first dimension, and collects foreign matter while passing the condensate therethrough. The in-condenser collector is provided inside the condenser, has an opening having a second dimension larger than the first dimension, and collects foreign matter while passing the condensate in the condenser therethrough toward the drain outlet.