Abstract ： The traditional separation of methanol distillation problemof high energy

consumption.Make  methanol  -  water  system  of  the  multi-effect  distillationprocess.Is  the  use  of
high-pressure multi-effect distillationtower overhead vapor latent heat of condensation to heat the
adjacent low-voltagetower bottom material, the two towers the public a heat exchanger to achieve
thepurpose  of  saving  energy  and  investment.Use  of  PRO  /  II  software  and  calculated
thermodynamicmodel  Alochol,To  simulate  the  separationof  methanol  -  water  system  double-
effect,  three-effect  distillation  ,  four-effect  distillation  process,The  lowest  energy  consumption
targets,The  optimumconditions  forthe  identification,use  of  PRO  /  II  software,  to  calculate  the
deviceparameters  of  each  tower,By  double-effect,  three-effect  distillation,  four  effective  process
compared  with  the  single-tower,optimum  process  scheme,Informed  that  the  double-effect  to  the
three-way  processas  the  best,  and  an  example  of  double  effect  has  been  to  optimize  the
process.And completed the hydraulic calculation of the tower。

Keywords: multi-effect distillation optimization hydraulics