Appropriate Placement of Evaporators

The concept of the appropriate placement of distillation columns was developed in the preceding chapter. The principle also applies to evaporators. The heat integration characteristics of distillation columns and evaporators are very similar. Thus, evaporator placement should not be across the pinch1. 

3 EVOLVING EVAPORATOR DESIGN TO IMPROVE HEAT INTEGRATION 

The thermodynamic profile of an evaporator can also be manipulated. The approach is similar to that used for distillation columns. The degrees of freedom are obviously different1,2. 

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Like distillation, the appropriate placement of evaporators and dryers is that they should be above the pinch, below the pinch, but not across the pinch. The grand composite curve can be used to assess appropriate placement quantitatively. 

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