A forward feed triple effect evaporator is used to fed 13608 kg/hr of NaOH solution containing 10 wt% solute entering the feed at 37.8 °C temperature. It is to be concentrated to a 50% NaOH solution. The steam used to enter at 58.6 kPa gage. The absolute pressure in the vapor space of the third effect is 6.76 kPa. The heat transfer coefficient are U1=6246, U2=3407, and U3=2271 W/m2K. All effects must have the same area. Calculate the surface area and steam consumption. (no BPR at 1st and 2nd effect)
A forward feed triple effect evaporator is used to fed 13608 kg/hr of NaOH solution containing 10 wt% solute entering the feed at 37.8 °C temperature. It is to be concentrated to a 50% NaOH solution. The steam used to enter at 58.6 kPa gage. The absolute pressure in the vapor space of the third effect is 6.76 kPa. The heat transfer coefficient are U1=6246, U2=3407, and U3=2271 W/m2K. All effects must have the same area. Calculate the surface area and steam consumption. (no BPR at 1st and 2nd effect)
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 forward feed triple effect evaporator is
used to fed 13608 kg/hr of NaOH solution
containing 10 wt% solute entering the feed at
37.8 °C temperature. It is to be concentrated
to a 50% NaOH solution. The steam used to
enter at 58.6 kPa gage. The absolute
pressure in the vapor space of the third
effect is 6.76 kPa. The heat transfer
coefficient are U1=6246, U2=3407, and
U3=2271 W/m2K. All effects must have the
same area. Calculate the surface area and
steam consumption. (no BPR at 1st and 2nd
effect)
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