HP feed heater

HP feed heater as fitted to cascade feed heater system instead of economiser

• The high pressure tubes are made of copper nickel or steel.

• The casing is made of mild steel

For efficiency it is important that the bottom of the heater does not become flooded.

As a large difference in pressure can be accommodated between the feed and steam , this type of heater can be fitted on the discharge side of the main feed pumps; in a cascade feed heating system this replaces the economiser and the heat in the flue gas is recovered by a regenerative air heater ( Lungstrom ). This system allows the feed to be heated to a high temperature

The change in temperature is normally about 30^oC

The heater, when new, must be able to withstand either or both of the following;

• 2 x boiler press + 20%

• 125 % feed press continuously