Separation principles part 3.

For part one of separation principles click here.

For part two of separation principles click here.

Imagine, you are going by highway with super speed. You will definitely enjoy the ride.

Now, imagine you have same car or bike and same speed, but you are going through bust trafic.

Then ? What will happen ?

You will hit your vehicle with someone or something ? Then after colliding, what ? Your speed will be reduced ?

Yes.

One more questions, of you have to run with 10 kg weight and 1 kg weight, what will be more energy consuming ?

From answer of this two questions, we can have one more separation technique, Which is separation by reduction in momentum.

Yes.

When liquid droplets are carried out along with gas (actually high velocity gas streams, like speedy car), we put restrictions in his straight path, so that it will collide with baffles (restrictions) and lose its energy.

So, here also, heavier oil particle loses its energy earlier and gas tends to as it is.

So, after losing it's energy ( which was in form of speed), oil droplets begin to settle down on baffle itself.

And when sufficient volume or mass of oil (here, density of all oil drops is constant) is gathered on baffles, *gravity force will dominates and whole oil globule will fall from above gas to below liquid section.

And that's how our liquid is separated from gas.

Same principle is used in mist extractor, where coiled wire is placed instead of baffle. Liquid drops have to undergo direction changes, and that's were they lose its momentum and collected on wires of mist extractor and latter on fall down when gravity dominates.

Same principle is used in inlet diverter section of separator also. High velocity well fluid enter into separator and collide with inlet diverter plate. And reduce it's momentum and initial separation of gas and liquid happens.