Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN: 9781259696527
Author: J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher: McGraw-Hill Education
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An evaporation-crystallization process (as shown below) is used to obtain solid potassium sulfate from an aqueous salt solution. The feed contains 18.7 wt% K2SO4. The wet filter cake contains solid sulfate crystals and a 40.0 wt% salt solution. The filtrate is recycled to mix with the feed. The evaporator has a capacity of 175 kg of water evaporated per second. The filtrate has 40.0 wt% salt solution, as well, and from the water entering the evaporator, 45.0% is evaporated. In the wet filter cake, there is 10 kg of the solid crystals for every 1 kg of the salt solution.
a.) Calculate the fresh feed rate. (Include units)
b.) Determine the production rate of crystal. (Include units)
c.) Calculate the recycle ratio. (kg recycle/kg feed) Include units
Transcribed Image Text:H20
Filter cake
CRYSTALLIZER K,Cro, (solid crystais)
AND FILTER
EVAPORATOR
Filtrate
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