HP Heaters

A Low-Pressure Feed water Preheater or Heater in power plants, heated with bleed steam and having a two-pass tube bundle of the tube sheet type of construction, has a carrier design for the tube bundle having side plates running parallel to the tube bundle and one or more supporting plates disposed perpendicularly to the tube bundle. In the center of the bundle between the cold and the hot leg are suction tubes through which non-condensable gases are drawn off in the zones of lowest pressure. The supporting plates are each made of a single piece and are thus continuous, and the partition consists of individual sheet-metal parts which are connected to the supporting plates. In one embodiment, the sheet-metal parts of the partition and the supporting plate are connected to one another by indentations on each side of the sheet-metal part which faces the supporting plate and by a corresponding opening in the supporting plate. LP Feed water Heater’s pressure ratings range between 400 and 1,500 psig.