An aqueous salt solution (salt + water) is fed to a two-unit evaporation-crystallization process. the fresh feed to the overall process contains 12.0 wt% salt. in the evaporator, pure water is removed at 225 kg/s. this is 55.0% of the water entering the evaporator. the concentrated salt stream leaves the evaporator and flows into the crystallizer where temperature is reduced. two streams exit the crystallizer. one is an aqueous salt stream containing 25.0 wt% salt; this stream is recycled and joins the fresh feed stream entering the evaporator. the other stream leaving the crystallizer is the product stream and contains solid salt crystals and a small amount of 25.0 wt% salt solution (at a ratio of 10.0 kg salt crystals/kg solution).

(a) draw a flowchart and label all streams. incorporate all of the information given above. use s to denote salt and w to denote water.

(b) do a degree of freedom analysis on the process and show you have enough information to solve for all unknowns.

(c) calculate the production rate of solid salt crystals, the flowrate of the fresh feed stream, and the recycle ratio: (kg/s recycled)/(kg/s fresh feed)