4 replies to this topic

[appi_0]

hi,

i want to design a distillation column completely from the begining to till end including boiler/HE,condensor,reboiler . can any body help me where to start? and the sequence of books i can go through inorder to completely follow the step by step procedure.

thanks and regards,

-REDDY

[siretb]

Good litterature is KISTER's distillation design and distillation operation. Also Carl BRANAN rules of thum for chemical engineers; Perry's Handbook.

The simplified sequence can be
1) identify the keys you want to separate (light key and heavy key) and the separation required; select pressure and chech that t(boiler) is not too high.
2) find relative volatility (can be pressure dependant)
3) use a shortcut like Underwood-Gilliland to find minimun and actual reflux&theoretical plates to be used (1.2*minimum reflux is a good starting point)
4) calculate from feed rate, distillate rate and reflux rate, boiler rate; calculate vapor density;
5) select an internal (plates or packing); from liquid and vapor rates size diameter. the F factor F=u(vapor velocity)*sqrt(rho vapor) is the piece of info you use
6) select and size reboiler
7) select and size condenser

Of course this will be shortcut, but good enough for initial sizing. The most diifficult step is probably to get relative volatility, especially if system is highly non-ideal (i.e. water-alcools)

[John Kervin]

hello.

You can consult also Allan Foust's Principles of Unit Operations.

Generous deed:I have a soft copy of Perry's.
Email me if you want it.

[Art Montemayor]

John:

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