2. Design and Drawing of the following: 2.1 Distillation tower- Plate type only (no. of plates, Diameter, Height, Steam and Water requirements) 2.2 Heat exchanger (Double pipe and Shell and tube type, no. of tubes, no. of passes and length of 1-1 and 1-2 pass). 2.3 Evaporator 2.3.1 Single, double and triple effect with forward and backward feeding. 2.4 Design of packed absorption column - height and diameter calculation.