The main purpose of a steam drum in a boiler system is to do what?

The primary function of a steam drum in a boiler system is to separate steam from water. Within the steam drum, steam bubbles rise to the top while water settles at the bottom. This separation process is vital for ensuring that only dry steam leaves the drum to go on to the steam system for use in power generation or heating processes. By allowing the steam to be separated from any entrained water, the steam drum helps maintain the quality of the steam, which is essential for efficient operation and preventing issues such as water carryover that can affect turbines or other systems utilizing steam.

While some components of a boiler system may participate in water flow, pressurized steam storage, or heating feedwater, none of these functions are the primary purpose of the steam drum itself. The steam drum's distinct role in maintaining steam quality sets it apart as a crucial element in steam generation and distribution within the boiler system.