Spray Drying is a process in which a liquid containing dissolved or suspended solids is injected into a chamber through a spray nozzle or centrifugal disk atomizer. The resulting mist is contacted with hot air, which evaporates most or all of the liquid, leaving the dried solids to fall to a conveyor belt at the bottom of the chamber. Powdered milk is produced in a spray dryer 6m in diameter by 6m high. Air enters at 167C and 40cmHO. The milk fed to the atomizer contains 70% water by mass, all of which evaporates. The outlet gas contains 12 mole\% water and leaves the chamber at 83C and 1atm (absolute) at a rate of 311m/min. Calculate a. the production rate of dried milk b. the volumetric flow rate of the inlet air. c. Estimate the upward velocity of air (m/s) at the bottom of the dryer. d. What problem would you guess would occur if the velocity is too high