Question

In order to heat up a distillation column for separating a mixture of reaction products, a superheated steam, P3 having a flowrate of 1500kg/hr, at 1 bar and superheated condition is used. This steam is provided by a heat exchanger, after blending two steam streams, F1(kg/hr), saturated steam at 0.5 bar discharged from a turbine and F2(kg/hr), superheated steam at 5 bar and 600^oC discharged from an exothermic reactor. The mixing unit operates adiabatically.

i. Draw the flow diagram for the above process, showing the relationship between the input and output streams. Perform the degree of freedom (DOF) analysis

ii. By using the mass and energy balances, determine the temperature and specific volume of stream P3. Given the mass flowrate ratio of F2/F1=4 and the steam table in Appendix.

iii. Calculate the volumetric flow rate of steam streams, F2 and P3.

Answer 1