Question

500 kg/h of an aqueous solution containing 35% masses of a certain salt are fed to a system that produces crystals from this pure salt. The stream in question is mixed with a recirculation that comes from a crystallizer-filter. The mixture of both streams is charged to an evaporator and the concentrated solution is fed to a filter-crystallizer . The filter cake consists of 94 % pure crystals and the balance of the residual solution . Considering that the rate of recirculation is R = 4.00 and it is required to produce 170 kg/h of crystals, what percentage of the water fed to the evaporator is eliminated in it?

Answer 1