ven1401011 - 1 VEN 140 -Spring 2010 Distilled Beverage...

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Unformatted text preview: 1 VEN 140 -Spring 2010 Distilled Beverage Technology Binary Multistage Column Distillation Roger Boulton 3154 RMI North rbboulton@ucdavis.edu Outline Multistage Column Distillation Analysis External Reflux Rate Internal Reflux Rate Operating Lines Stepping of Stages Number of Stages to get a desired Separation Total Reflux Condition Minimum Reflux Condition 2 3 Professor Guymons Column 4 Material Balances Multistage Columns 5 6 Top of the Column (Rectifying Section) For the rectifying or concentrating section of the column: Vn+1 = Ln + D. From the ethanol component balance, Vn+1 yn+1 = Ln*xn + D*xD Or yn+1 = Ln*xn + D*xD Vn+1 Vn+1 By assuming equal molar heats of vaporization: Vn = Vn+1 = Vn+2 = V dropping the subscripts denoting the plate number. This leads to: yn+1 = L *xn + D *xD Equation 1. V V This equation gives the relationship between the vapor entering tray n and the liquid leaving tray n , or the composition of vapor and liquid streams interaction on tray n . 7 This equation gives the relationship between the vapor...
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ven1401011 - 1 VEN 140 -Spring 2010 Distilled Beverage...

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