This Calculator performs Distillation Column design using Fenske-Underwood-Gilliland (FUG) shortcut method.
To obtain a higher confidence solution a simulation in commercial simulator can be performed with these calculated
values as input. (It will converge readily with these values.)
Use illustration.
Problem-
Recover from a 200 kmole/h feed containing 50mol% ethane and 50mol% propane as a liquid bubblepoint feed 90%
of ethane and 10% propane in distillate
Procedure
- Select ethane from comp1 dropdownlist, enter 0.5 in xf1 and LK(light key). in comp2 dropdownlist select propane
and enter 0.5 in xf2 and HK(heavy Key) (You need to specify light Key (LK) and heavier key (HK) and specify
whether others are LLK or HHK etc. (Use Vapor Pressure to determine which is LK, HK etc.))
Enter q=1 and feed viscosity of 0.06 mPa.s. Feed as 200 moles/hr
In recovery enter 90 for comp1 and 10 for comp2
- Select condensor temperature based on coolant available.
Enter condensor temp based on coolant available, 0 C in our case.
- Press calculate and read the design values. Actual reflux is your decision based on whether cost of coolant for
more relux rate or cost of adding additional trays is lesser. Both improve seperation. Typically R=1.2*Rmin.
This is the shortcut design of the column.
You can use these values to simulate in a commercial simulator and obtain a higher confidence solution without
iterating with many options