concentration in gas mixture

[koshyeng]

A centrifufal pump pumps a mixture of acetone and water to an atmospheric tank at 75gpm. Vent gases from this tank are send to an absorber using a blower. under working conditions, I measured solvent ppm and velocity at the blower inlet and calculated scrubbing liquid flow rate required( just for exercise) Now to decrease transfer time, we are planning to pump at 135 gpm to this tank.
how can I calculate flow rate of solvent in the vent gas(to blower) under these conditions??
Appreciate your help for a beginner.

Koshy

 

[JimCasey]

75 gpm is just over 10 cubic feet per minute. This is the atmosphere displaced in the tank by the inflow, assuming no concurrent outglow. Proportionally, 135 gpm is just over 18 cfm. Multiply 18cfm by the concentration of acetone in the tank atmosphere you calculated, and you will know the rate of solvent to the blower.

 

[koshyeng]

Casey,

There is outflow too at 90 gpm and the rest overflows to a sump.

At any flow rate, acetone conc in the liquid willl be maintained at 1200ppm(wt). Based on this I can get flow rate of acetone and water in the mixture
If I use boyle's law, PV = constant and using partial pressure of acetone, I can get volume of acetone in the vent gas. I am kinda confused if this calculations are right.

Thank you

Koshy

 

[koshyeng]

I am sorry. Acetone concentration in the liquid wont be same. it will increased to 1600ppm at higher rates. Please guide me.

what are the guidelines to determine packed column total height? any references?

Thank You
Koshy