22. Design a distillation column for stabilization of gasoline. The column thickness should be calculated keeping provision for various stresses. Also design a skirt-support for the column.
Height 50m, diameter 2.25m, Hemispherical head, 90 sieve plates equally placed, insulation material mineral wool, material of construction S.S. maximum allowable stress 135N/mm$^2$ at 200$^\circ$C, operating pressure 12 bar(absolute), joint efficiency = 1.