 The burner
lance consists of two concentric tubes, a one-piece nozzle and a sealing nut.
The media supplies are arranged so that the steam is supplied down the center
tube and the fuel oil through the outer tube. Consequently, the steam space is
completely isolated from the oil space.
The steam atomizer consists of an atomizer body that has a number of discharge
nozzles arranged on a pitch circle in such a way that each oil bore meets a
corresponding steam bore in a point of intersection. Oil and steam (air) mix
internally forming an emulsion of oil and steam at high pressure. The expansion
of this mixture as it issues from the final orifice produces a spray of finely
atomized oil.
Oil burners with steam atomizing are tolerant to viscosity changes. In addition
to this advantage, the steam atomized oil burners have better turn down, do not
require high fuel oil pump pressures, and are frugal in the use of steam.
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