PAP Distilasi

PACKED COLOUMN & BUBLE CUP TRAY Pada Distilasi

"There are several types selection of distillation separating column such as :

       1. Packed Tower 
A column is completed of packing to enlarge contact area and creating turbulence so more perfect contacting. The working principle is different phase substance flow counter current, so chemical component is transferred from one phase to another phase . Liquid phase flow from above 

and gas from bottom so both is contacted.

Selected packed tower because :

·                     For corrosive liquid, because cheaper instrument

·                     Requires low liquid resistance because large density

·                     Provide low pressure drop per equilibrium stage

·                     For small column diameter

The requirement of quality packing are :

·                     Small bulk density (not loading column)

·                     Large the wetted area

·                     Large the hole volume (reducing pressure drop)

·                     Good wetting properties

·                     Corrosion resistant

·                     Have a strong structure to hold the piles load

·                     Cheap

Selection of packing material :

·                     Ceramic, for corrosive liquid

·                     Plastic, suitable for moderate temperature and not suitable for organic solvent

·                     Metal, for unstable operating condition"

"2. Tray / Plate Column
Same shape with packed column but does not packing, for substitute there are plates have function enlarge contact between component so can be separated by density.

The number of plate stage is formed according to :

·                     Height of difficult separation of substances will be separated

·                     Calculatton of mass balance and equilibrium

Selected this type not packed tower because :

·                     Can handle large liquid and gas flow rate

·                     Easy maintenance because can be installed manhole

·                     Easier to taking the product through side stream

·                     Plate design more secure working efficient"