what is light oil burner for industrial boiler for?

Light oil burner is a kind of combustion device mainly based on light oil fuel, mainly composed of oil atomizer and air regulator. Light oil burner is suitable for all kinds of light oil other than gasoline, diesel, aviation kerosene, solvent oil as fuel! Diesel burners are more commonly used!  

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An oil burner is a part attached to an oil furnace, water heater, or boiler. It provides the ignition of heating oil/biodiesel fuel used to heat either air or water via a heat exchanger.