Internal mix steam atomizer

Internal mix steam atomizer

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Internal mix steam atomizerThe 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 atomizer
Hamworthy internal mix steam atomizing burner lance nozzle.

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