Steam Drum

The mixture of steam and water is separated in the steam drum. This may include mechanical devices to assist in removing entrained water from the steam. Steam from the drum may be heated further in some boilers to generate superheated steam. Usually the feedwater is added to the steam drum. Chemical feed for internal boiler water treatment also may be added to the steam drum. The continuous blowdown is the discharge of the boiler water to maintain the required operating condition in the boiler. In some cases the blowdown will be discharged to a flash drum where lower pressure steam is recovered (possibly for use in the deaerator).