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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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
Transcribed Image Text:Q11 A solution containing 15.0wt%NaCl, 5.0wt% KCl, and 80wt%water is fed to an evaporator
crystallizer process. The fresh feed stream mass flowrate is 1000 Kg/h, the fresh feed is added with the
recycle stream, coming from the crystallizer stream, and enters an evaporator. In the evaporator, pure
NaCl is collected at the bottom of the evaporator, and the top stream is pure water vapor. The evaporator
outlet stream composition is 17wt% NaCl, 22wt% KCl, and 61wt% water enters to the crystallizer unit.
Pure KCl is collected as bottom product from the crystallizer. The crystallizer outlet stream is entirely
recycled and joins the fresh feed stream. The recycle stream contains 20wt% NaCl, the balance is water
and KC1.
Draw the process flow sheet
Calculate the mass fraction of KCl in the recycle stream
N2
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