A single effect evaporator is to concentrate 6000 kg/h of an 18 % solution of sodium hydroxide to 50 % solids. The gauge pressure of the steam is to be 1 atm; the absolute pressure in the vapour space is to be 100 mmHg. The overall coefficient is estimated to be 1600 W/m²K. The feed temperature is 45 ºC. Please refer to Figures 1 and 2 and Tables 1 and 2. (a) Sketch the process and locate different variables listed above within the evaporator setup. (b) Calculate the following: (i) amount of steam consumed, (ii) the steam economy (iii) the heating surface area required
A single effect evaporator is to concentrate 6000 kg/h of an 18 % solution of sodium hydroxide to 50 % solids. The gauge pressure of the steam is to be 1 atm; the absolute pressure in the vapour space is to be 100 mmHg. The overall coefficient is estimated to be 1600 W/m²K. The feed temperature is 45 ºC. Please refer to Figures 1 and 2 and Tables 1 and 2. (a) Sketch the process and locate different variables listed above within the evaporator setup. (b) Calculate the following: (i) amount of steam consumed, (ii) the steam economy (iii) the heating surface area required
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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A single effect evaporator is to concentrate 6000 kg/h of an 18 % solution of sodium hydroxide to
50 % solids. The gauge pressure of the steam is to be 1 atm; the absolute pressure in the vapour
space is to be 100 mmHg. The overall coefficient is estimated to be 1600 W/m²K. The feed
temperature is 45 ºC. Please refer to Figures 1 and 2 and Tables 1 and 2.
(a) Sketch the process and locate different variables listed above within the evaporator setup.
(b) Calculate the following:
(i) amount of steam consumed,
(ii) the steam economy
(iii) the heating surface area required.
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