Ion exchanging resin comes out from a centrifugal washer at a flow rate of 6.45kg/s. It is washed by process water and contains 65wt% water. It is required to be dried to contain 35wt% water. You are attempting to design a dryer to dry the resin by dry hot air. The dryer temperature needs to be not higher than 90oC. 1) Calculate the minimum dry air flowrate required at 60,70,80 or 90C for isothermal operation ( 2) Calculate the dry air flow rate required at 60,70,80 or 90C for isothermal operation if the mass transfer efficiency is 75% 3) Plot the results of 1) and 2) against the operation temperature and discuss around the results in terms of the dryer design and operation. |