Burner Vaporizer Coil And Fuel Nozzle

The burner vaporizer coil sits just above the burner grate.  Thus burner fuel (kerosene) is fed into the vaporizer coil at the end shown at the upper right corner of the photo.  It then flows out the end of the vaporizer where the heavier cast rings have been placed over the vaporizer tube.  The cast rings serve two purposes.  First the cast rings protect the vaporizer tube from becoming too hot when no fuel is flowing through the tube by preventing the pilot flame from impinging directly on the tube.  They also serve as a mass of metal to heat and thus provide a more uniform application of heat to the vaporizer tube walls.

Approximately three-quarters of the vaporizer tube contains a stainless steel wire.  The purpose of the wire is to further distribute the heat to the fuel flowing through the vaporizer when the burner is firing.  The vaporizer can also become plugged with carbon deposits similar to the pilot vaporizer and pulling the wire allows the tube to be cleaned of deposits.  In really severe cases the vaporizer can become so plugged that the wire can not be removed.  In these instances an oxygen supply is connected to the supply end of the tube.  The tube is heated red hot and the oxygen is admitted.  When the oxygen hits the red hot pipe and carbon it ignites the carbon deposits and the pipe burns free of carbon deposits within a very quick period of time.