1 reply to this topic

[sateeshkumar830]

Dear Sir,

 

I want to know the what capacity of pump(flow rate m^3/hr) is required for distillation column(Structural packing) to maintain reflux and distilled collection. wanted to know the boil up vs pump capacity required. i think if we use more capacity pump than the boil up , there might be chances to get cavitation in the pump. so how much capacity of the pump is preferable and maximum boil up of the solvent  for the following conditions of a distillation column.

 

Solvent  - Iso propyl alcohol (95% IPA, 5-6% Moisture content)

Batch distillation kettle capacity - 5KL

Batch Distillation Column ID - 500mm

Structured Packing along with Column Internals -  2.95 m3

Main Condenser for Batch   Distillation Column - 1200 kg/hr Methanol

Secondary Condenser for Batch   Distillation Column - 1200 kg/h Methanol

 

[Art Montemayor]

To find the "vapor boilup" (as you call it) or the vapor overheads capacity of any distillation column, you have to process design the distillation process first.  That means you have to identify the:

• Feed flow rate;
• Overheads flow rate;
• Bottoms flow rate;
• Reboiler duty; and 
• The Reflux Rate.

Since you obviously haven't done this (this is obvious because you haven't reported it; otherwise, you would have), this is the first thing you should embark on before contemplating on how to "size" the reflux/overheads product pump.   Once you have those values, our members can then actively advise you on the required pump and how to design it.  You have to generate the basic data.  Without it, you are at a standstill.