WEBC08 06/04/2015 22:38:23 Page 473 Aqueous slurry at 30C 20 wt% S (solids) Slurry P = 1
Chapter 8, Problem 8.67(choose chapter or problem)
WEBC08 06/04/2015 22:38:23 Page 473 Aqueous slurry at 30C 20 wt% S (solids) Slurry P = 1 atm EVAPORATOR 35 wt% S H2O(v) H2O(l) Sat'd, 2.6 bar H2O(v) Sat'd, 2.6 bar (a) Calculate the required steam feed rate (kg/h) for a slurry feed rate of 1:00 103 kg/h. (b) Vapor recompression is often used in the operation of an evaporator. Suppose that the vapor (steam) generated in the evaporator described above is compressed to 2.6 bar and simultaneously heated to the saturation temperature at 2.6 bar, so that no condensation occurs. The compressed steam and additional saturated steam at 2.6 bar are then fed to the evaporator coil, in which isobaric condensation occurs. How much additional steam is required? (c) What more would you need to know to determine whether or not vapor recompression is economically advantageous in this process?
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