The burner acts as the core combustion unit of an oil-fired furnace, mainly assembled with a fuel nozzle, air register and igniter. The fuel nozzle breaks liquid fuel into tiny droplets to achieve full and fast combustion. Typical nozzle types cover mechanical atomizing nozzles including pressure atomization and spill return types, rotary cup nozzles, as well as dual-fluid nozzles adopting steam atomization or air atomization technology.
The air register creates swirling airflow and rationally distributes combustion air. It ensures thorough mixing between air and atomized oil mist, which effectively improves the overall combustion efficiency of the furnace. The igniter adopts two electrode rods made of heat-resistant aluminum-magnesium alloy, with a tip clearance of 3–4 mm. Once 5,000–10,000 V high voltage is applied, electric arcs will form at the gap to ignite the atomized fuel entering the furnace chamber.
