The furnace section or combustion chamber it’s called. It’s usually corrugated steel in these package utility boilers. Almost looks like culvert pipe, just not spiral.
There’s a refractory throat to shape the flame at the burner end too.
Water boiling into steam takes the heat away. It’s flooded full of water on the other side, like a pot on a stove.
So wait. That implies that there are other parts of it that are significantly hotter, probably near the burner.
Is some magical process happening keeping the whole thing from turning into steam and chunks of metal?
The furnace section or combustion chamber it’s called. It’s usually corrugated steel in these package utility boilers. Almost looks like culvert pipe, just not spiral.
There’s a refractory throat to shape the flame at the burner end too.
Water boiling into steam takes the heat away. It’s flooded full of water on the other side, like a pot on a stove.