Question: A horizontal cylindrical continuous decanter is to separate 1500 bbl/d of a liquid petroleum fraction from an equal volume of wash acid. The oil is the continuous phase and at the operating temperature has a viscosity of 1.1cP and a density of 54Ib/ft3 (865kg/m3). The density of the acid is 72lb/ft3 (1153kg/m3) a) the length and diameter of the vessel (in ft3). The length of the cylindrical tank should be 5 times its diameter. b) the height of the acid overflows above the vessel floor .
