Mass Exchanger Network analysis

El-Halwagi, M. M., and Manousiouthakis, V. (1989b). Design and analysis of mass exchange networks with multicomponent targets, AIChE Annual Meeting, San Francisco. 

Kemp, I.C., Deakin, A.W., 1989. The cascade analysis for energy and process integration of batch processes, Part 1, Chem. Eng. Res. Des., 67 495-509 Kiperstok, A., Sharratt, P.N., 1995. On the optimization of mass exchange networks for the removal of pollutants. Trans. IChemE, 73b 271-277... 

Another problem of significance is the optimum policy of water recycling. This subject is in itself substantial and cannot be handled here. An economical approach involves optimal allocation of streams, both as flow rates and contaminant concentration. The analysis may be performed systematically with tools based on the concept of water pinch and mass-exchange networks . This subject is treated thoroughly in specialized works, as in the books of El-Halwagi [19] and Smith [20]. A source-sink mapping technique developed around the acrylonitrile plant may be found in the book of Allen and Shoppard [21]. 

Pinch analysis can optimize the combined heat and mass exchanger network and chemical reactor systems with heat exchangers. 

This paper has presented and tested a design philosophy for the synthesis of mass exchange networks whereby an MINLP approach is integrated with pinch analysis tools. At the heart of the integration is the use of pinch-based total cost targets to evaluate the optimality of MINLP solutions and driving force diagrams to identify different initial solution structures. 

After a process design has been conceptualized and a preliminary PFD developed, further analysis is possible to reduce pollution. The PFD should be studied to make certain that all possible recycle opportunities have been exploited. For processes with multiple streams containing the same solute, mass integration is possible using the method of mass-exchange networks (MENs) described in Chapter 15. More detail on the MEN method and other methods for analysis to maximize solute recovery is available [10]. Exanple 25.3 demonstrates this type of analysis of a PFD. 

Mass-exchanger networks (MENs). See MENs fmass-exchanger networks . Mass separating agents, separation problems, 633-639 Mass transfer, rate equations for performance analysis, 599-601 Material factors... 

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