Steam generator feedwater heater

The invention proposes to improve the inlet zone of the condensates in the heater vessel. So, the mixture water-vapor is separated in good conditions; the upward vapor outflow and the downward liquid phase flow are improved, what reduces the condensate volume rate and, thus its velocity along the inner walls of the shell. The cross baffles arranged in the passage zones contributes to dissipate the kinetic energy of the inlet condensate flux. Finally, it allows to improve considerably the flow conditions along the walls and to get a distribution of velocities compatible with the nature of materials which constitute these walls, reducing by this way the erosion-corrosion risks