 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
centre 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 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 internal mix 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.
Hamworthy™ internal mix steam atomizing burner
lance nozzle.
A Hamworthy™ internal mix steam atomizing burner at
Karlshamn power plant in Sweden.
The power plant has three 340MW boilers, each with 18 burners.
|
