The basis for this case study is shown in Fig.
18; it is a crude unit with overhead heat integration.
This is a one-drum overhead system with heat integration and no water wash. In an
attempt to avoid corrosion, the unit configuration takes diesel
through heavy naphtha as a single overhead product. The
operating conditions are for a mid-run on 21.6°API (0.9241)
mixed-crude blend (Fig. 18).