Condensate pre-heater in the boiler

Condensate pre-heater in the boiler

Condensate pre-heater in the boiler

Using a condensate pre-heater to heat up condensate is a typical lay-out used for 1-stage, 2-stage and 3 stage pressure systems.

In such configurations condensate is fed into the boiler via the condensate pre-heater. The steam for deaeration is taken from the boiler. The condensate flow is dictated by:

  • the load of the gas turbine
  • the percentage of supplementary firing (if installed)
  • the ambient temperature

The condensate temperature is determined by the performance of the condensate pre-heater and is particularly dependent on the extent of supplementary firing. The combination of condensate outlet temperature and flow determines the quantity of steam to the deaerator. The deaerator can also be operated in sliding pressure mode.