A solution containing 15.0 wt% NaCl, 5.0 wt% KCI, and 80 wt% water is fed to an evaporator-crystallizer process. The fresh feed stream mass flow rate is 1000 kg/h, the fresh feed is combined with the recycle stream, coming from the crystallizer stream, and enters an evaporator. In the evaporator, pure NaCI is collected at the bottom of the evaporator, and the top stream is pure water vapor. The evaporator outlet stream composition is 17 wt% NaCl and 22 wt% KCI, and 61% water enters the crystallizer unit. Pure KCI 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 20 wt% NaCl, the balance is water and KCI (i.e., both components are 80 wt%). The bottom products of the evaporator and the crystallizer consist of dry and pure NaCl and KCI, respectively. Draw the process flow sheet and calculate the mass fraction of KCI in the recycle stream.
A solution containing 15.0 wt% NaCl, 5.0 wt% KCI, and 80 wt% water is fed to an evaporator-crystallizer process. The fresh feed stream mass flow rate is 1000 kg/h, the fresh feed is combined with the recycle stream, coming from the crystallizer stream, and enters an evaporator. In the evaporator, pure NaCI is collected at the bottom of the evaporator, and the top stream is pure water vapor. The evaporator outlet stream composition is 17 wt% NaCl and 22 wt% KCI, and 61% water enters the crystallizer unit. Pure KCI 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 20 wt% NaCl, the balance is water and KCI (i.e., both components are 80 wt%). The bottom products of the evaporator and the crystallizer consist of dry and pure NaCl and KCI, respectively. Draw the process flow sheet and calculate the mass fraction of KCI in the recycle stream.
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:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:A solution containing 15.0 wt% NaCl, 5.0 wt% KCI, and 80 wt% water is
fed to an evaporator-crystallizer process. The fresh feed stream mass
flow rate is 1000 kg/h, the fresh feed is combined with the recycle
stream, coming from the crystallizer stream, and enters an evaporator.
In the evaporator, pure NaCI is collected at the bottom of the evaporator,
and the top stream is pure water vapor. The evaporator outlet
stream composition is 17 wt% NaCl and 22 wt% KCI, and 61% water
enters the crystallizer unit. Pure KCI 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 20 wt%
NaCl, the balance is water and KCI (i.e., both components are 80 wt%).
The bottom products of the evaporator and the crystallizer consist of
dry and pure NaCl and KCI, respectively. Draw the process flow sheet
and calculate the mass fraction of KCI in the recycle stream.
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