Rotary cup burner
The rotary cup is driven at
high speed (about 5000 RPM) by an electric motor via a heavy-duty belt drive.
The fuel oil flows at low pressure into the conical spinning cup where it
distributes uniformly on the inner surface and throws off the cup rim as a very
fine oil film. A primary air fan discharges the primary air concentrically
around the cup, strikes the oil film at high velocity and atomizing it into
tiny droplets. The rotary cup burner finds considerable use on packaged shell
type boilers. These burners have good turn down ratio and they are rather
insensitive to pollutants in the fuel oil.