Patent ID: 6095238
Filing Date: 2000-08-01
Classification: F22D,F28B,F28D,Y10S

Abstract:
A feed water heater comprising:a cylindrical shell portion constituting a main body portion of a feed water heater;a water box operatively connected to the cylindrical shell portion and partitioned by a tubesheet;a heat exchanger tube bank arranged in the cylindrical shell portion and supported by support means composed of a plurality of support plates;a drain cooling section, disposed in association with the heat exchanger tube bank, for carrying out a recovery of heat generated in the heat exchanger tube bank;a steam supply means provided in an outer wall section of the cylindrical shell portion for supplying steam as a heating medium;a dilution condensing chamber provided for the heat exchanger tube bank and adapted to flow the steam excessively into the heat exchanger tube bank; anda non-condensable gas chamber provided for the heat exchanger tube bank for almost completely condensing the steam;wherein said dilution condensing chamber is located at a portion adjacent to a drain inlet of the drain cooling section and said non-condensable gas chamber is located at a portion adjacent to said dilution condensing chamber so that said dilution condensing chamber is disposed between said non-condensable gas chamber and said drain cooling section;wherein said dilution condensing chamber has a box-shaped structure utilizing the support plates and is positioned substantially perpendicular to said steam supply means.