Which boilers have a steam drum
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I’m new to boilers. I would like to ask the experts: which boilers have upper and lower steam drums? Do boilers that produce superheated steam have steam drums, while boilers that produce saturated steam do not? The larger boilers I’ve seen all have steam drums, whereas smaller steam boilers do not. Please help me understand this, thank you
A boiler without a drum is a once-through boiler; those with upper and lower drums are double-drum boilers. Most boilers have one drum, and the steam inside it is saturated steam, which then passes through a superheater, and after exiting the superheater, it becomes superheated steam
Most boilers in use have a steam drum, also known as a boiler drum. It serves to collect steam, separate the cleaning steam, and act as a buffer for the system. Direct-fired boilers without a drum require higher levels of operational control
Are boilers with a relatively large capacity generally equipped with two steam drums? What is the function of the lower steam drum? Is it a drum that contains only water and no steam?
The upper drum can be considered as a steam separator, while the lower drum can be seen as a header