31. Steam Drum
After leaving the economiser, the feedwater reaches the steam drum, which is a cylindrical vessel at the top of the boiler. From here the water flows by natural circulation through downpipes into the boiler. Saturated steam collects here ready to go to the superheater.
Pauline says...
The steam drum is simply a huge tank 30.5 metres long that holds both water on its way into the boiler and steam ready to be superheated. It's vital to keep a level of water in the steam drum, otherwise the boiler will very quickly overheat.
