Oily Water Separator (OWS) Principle and Working

Principle of Operation:

>  The principle of operation of OWS is the gravity difference between oil and water

> The force acting on an oil globule causing it to move in the water is proportional to the difference in weight between the oil particle and a particle of water of equal volume.

        Fs = separating force

       Pw = density of water

 Po = density of oil globule

    d = diameter of oil globule

    g =  acceleration due to gravity

> The resistance to the movement of the globule depends on its size and viscosity of the fluid.
> For small particles moving under stream line flow the relationship between these properties is expressed by Strokes Law:

Fr  =  3pmnd

Fr = resistance to movement

m = viscosity of fluid

n = terminal velocity of particle

d = diameter of oil particle

> When separation of an oil globule in water is taking place, 

 Fs = Fr 

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