A steam-heated evaporator used to concentrate a feed stream by evaporating water is shown in Fig. E8.14.
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fraction of solute in the exit stream x is measured and controlled by adjusting the steam flow rate, S. The control valve is fail-open. Should the composition controller be direct-acting?
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Related Book For
Process Dynamics and Control
ISBN: 978-1119385561
4th edition
Authors: Dale E. Seborg, Thomas F. Edgar, Duncan A. Mellichamp, Francis J. Doyle
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