Helow Jonathan
     
    Water distillation is mainly concerned with  evaporation and then condensation water  vapor  evaporated, where as alcohol still need to selectively seperate  low volatile  etanol using heat ,as well as  can condense  selectively the ethanol and hence need column.Thus  water distiller can be mainly smalltank type ,less condensation problem ,where as  ethanol still is column.Hence tey need to be diffrent in design , eventhouh they all envolve similar process as you outlined. We here do like the design  for small  scale  equipment  for sustainable  biofuel process developments.using air as  coolant  and then recover the energy  for drying   can be possible ,but  yet taht type of noval  distillation units need to  evolved .You can try one  taht can save  the huge energy cost of  ethanol as one need 5 Kg of  steam for every  1 l of  ethanol.
 
sd
Pannirselvam P.V

 
On 11/23/05, Jonathan Schearer <[EMAIL PROTECTED]> wrote:
I have a question for the group.  Would a water distiller like the kind found at www.waterdistiller.com be similar to an alcohol still?  Usually an alcohol still has a column and uses water as the coolant for the condenser.  These water distillers use a coil that is air cooled. 


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Pagandai V Pannirselvam
Universidade Federal do Rio Grande do Norte - UFRN
Departamento de Engenharia Química - DEQ
Centro de Tecnologia - CT
Programa de Pós Graduação em Engenharia Química - PPGEQ
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