Fluid spraying apparatus

A fluid spraying apparatus for dislodging or re-suspending sludge in an oil storage tank, said apparatus comprising a generally cylindrical body defining a longitudinal axis, which body comprises:

• a first fixed part comprising an inlet, a central body portion, and a longitudinal connecting portion between said central body portion and said inlet portion, wherein said inlet portion is adapted for connection to a pumped supply of fluid and defines a passageway;
• turbine means mounted on said central body portion, said turbine means comprising a turbine that is positioned in said passageway to be driven by fluid entering therein;
• a second rotatable part comprising a nozzle body, and one or more generally frustoconical nozzles that are positioned on said nozzle body around said longitudinal connecting portion in fluid communication with said turbine for outletting the fluid as one or more jets;
• and
• gear means connected between said turbine means and said second rotatable part;
• wherein said rotatable part is drivable by said turbine means through said gear means such that said one or more nozzles are caused to rotate about said longitudinal axis;
• and
• wherein at least one of the nozzles extends radially of said longitudinal axis and has a taper in the range of 10 to 40° so as to produce a convergent jet for dislodging or re-suspending sludge while minimizing the back pressure, and none of the nozzles extends radially of the longitudinal axis further than the body.