Distillation Column design procedure Determine Calculate Column Specs and Constraints Minimum Reflux Requirement Underwood) Choose reflux rate stimate overal Set column and estimate Theoretical tray Tray Efficiency Pressure Requirement (cOnnell, Gilliland Murphree) Calculate vapor Calculate Actual and liquid OK? Trays Required Traffie and column VB,,LB,LT Height (HOu Calculate Calculate Column Mininum tray Diameter Above& below Requirement Feed (Fenske Nmin< 30? Dma<7m?与 Simulate and Size auxiliary Equipment e 9/2799 Simple distillation design9/27/99 Simple Distillation Design 4 Determine Column Specs and Constraints Set Column Operating Pressure Calculate Mininum Tray Requirement (Fenske) OK? Modify No Nmin< 30? Yes No Calculate Minimum Reflux Requirement (Underwood) Choose Reflux Rate and Estimate Theoretical Tray Requirement (Gilliland) Calculate Vapor and Liquid Traffic VB , VT , LB , LT Calculate Column Diameter Above & Below Feed (Fair) Dmax < 7 m? Yes No Yes Estimate Overall Tray Efficiency (O'Connell, Murphree) Calculate Actual Trays Required and Column Height (HCOL) HCOL < 30 m? Simulate and Size Auxiliary Equipment Yes No Distillation Column Design Procedure