Steam generators

摘要

A steam generator having an elongated vessel provided with opposed upper and lower ends and having in its interior adjacent its upper end a single transversely extending tube plate and a partition extending upwardly from said tube plate and dividing the interior space of the vessel above the tube plate into a heating-medium receiving chamber and a heating-medium discharge chamber. A bundle of tubes are connected with and extend downwardly from the tube plate to the region of the lower end of the vessel, each of these tubes having an inlet end communicating with the receiving chamber and an outlet end communicating with the discharge chamber and each of these tubes having a substantially U-shaped configuration at the region of the lower end of the vessel. A feedwater supply communicates with the vessel below the tube plate to supply to the interior of the vessel a liquid to be converted into steam with heat extracted from the heating medium which flows through the tubes from the receiving chamber to the discharge chamber. Above the liquid which is in the vessel there is a steam chamber defined at least in part by a lower surface of the tube plate at that part thereof to which the inlet ends of the tubes are connected, and a steam discharge conduit communicates with the steam chamber to receive live steam therefrom.