Pure solid sugar is recovered from sugar cane in a process that has multiple steps. Among all the steps, three steps are considered here (see figure below). A screen is used to separate pulp (solid material) from sugar and water. In the evaporator, a portion of the water is removed. The remaining water is removed in a crystallizer, Stream 1 Screen Stream 2 6250 kg/h 6500 kg/h 7250 kg/h Stream 3 7500 kg/h Stream 4 Pure Water Vapor Evaporator Stream 5 Stream 1 contains 14 mass percent sugar, 16 mass percent pulp, and the remaining is water. All the pulp in Stream 1 goes to Stream 2. Stream 2 contains 96 mass percent pulp. Stream 3 contains no pulp, 16 mass percent sugar, and the remaining is water, and is sent to the evaporator. Stream 4 is pure water. Stream 5 contains sugar and water and is sent to the crystallizer. Pure water (Stream 6) leaves the crystallizer at a rate of 1500 kg/h and pure sugar (Stream 7) leaves the crystallizer at a rate of 1000 kg/h. The process operates at steady state. What is the total flow rate of Stream 1 entering the screen? Crystallizer Stream 6 Pure Water Stream 7 Pure Sugar
Pure solid sugar is recovered from sugar cane in a process that has multiple steps. Among all the steps, three steps are considered here (see figure below). A screen is used to separate pulp (solid material) from sugar and water. In the evaporator, a portion of the water is removed. The remaining water is removed in a crystallizer, Stream 1 Screen Stream 2 6250 kg/h 6500 kg/h 7250 kg/h Stream 3 7500 kg/h Stream 4 Pure Water Vapor Evaporator Stream 5 Stream 1 contains 14 mass percent sugar, 16 mass percent pulp, and the remaining is water. All the pulp in Stream 1 goes to Stream 2. Stream 2 contains 96 mass percent pulp. Stream 3 contains no pulp, 16 mass percent sugar, and the remaining is water, and is sent to the evaporator. Stream 4 is pure water. Stream 5 contains sugar and water and is sent to the crystallizer. Pure water (Stream 6) leaves the crystallizer at a rate of 1500 kg/h and pure sugar (Stream 7) leaves the crystallizer at a rate of 1000 kg/h. The process operates at steady state. What is the total flow rate of Stream 1 entering the screen? Crystallizer Stream 6 Pure Water Stream 7 Pure Sugar
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:Pure solid sugar is recovered from sugar cane in a process that has multiple steps.
Among all the steps, three steps are considered here (see figure below). A screen is
used to separate pulp (solid material) from sugar and water. In the evaporator, a
portion of the water is removed. The remaining water is removed in a crystallizer,
Stream 1
Screen
Stream 2
6250 kg/h
6500 kg/h
7250 kg/h
Stream 3
7500 kg/h
Stream 4
Pure Water Vapor
Evaporator
Stream 5
Stream 1 contains 14 mass percent sugar, 16 mass percent pulp, and the remaining
is water. All the pulp in Stream 1 goes to Stream 2. Stream 2 contains 96 mass
percent pulp. Stream 3 contains no pulp, 16 mass percent sugar, and the remaining
is water, and is sent to the evaporator. Stream 4 is pure water. Stream 5 contains
sugar and water and is sent to the crystallizer. Pure water (Stream 6) leaves the
crystallizer at a rate of 1500 kg/h and pure sugar (Stream 7) leaves the crystallizer
at a rate of 1000 kg/h. The process operates at steady state. What is the total flow
rate of Stream 1 entering the screen?
Crystallizer
Stream 6
Pure Water
Stream 7
Pure Sugar
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