Burner Operational Tips on Atomization
Oil must be temperature-controlled to the design viscosity at the burner. For proper combustion, fuel oil has to be broken up onto small droplets to vaporize and burn. If the oil is too viscous, the atomizer inside the oil gun won’t work right. “Sparklers” and long, dull flames appear because oil is thrown well outside the intended combustion zone before it burns.
Make sure the design steam pressure is maintained. Steam assists in atomization and is thought to catalyze the combustion process. Low steam pressure results in poor atomization even when the oil viscosity is right. Long, smoky flames result.
Don’t enlarge the burner ports to reduce plugging. Larger holes reduce the fuel pressure and give poor mixing. Result: long, billowy flames. Also, if the oil pressure is then raised, the burner can be overfired, producing local air starvation.
Oil burners are more susceptible to plugging than are gas burners. The oil is filtered upstream of the burner to remove solids. Excessive burner plugging usually indicates inadequate fuel filtering.