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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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10.1.2 Inlets and Outlets

Inlet and outlet ports must be carefully designed to prevent problems (Glitsch, 1985; Kister, 1980a, b, 1990, 1992, 2005; Ludwig, 1997). Inlets should be designed to avoid both excessive weeping and entrainment when a high-velocity stream is added. Several acceptable designs for a feed or reflux to the top tray are shown in Figure 10-8. The baffle plate or pipe elbow prevents high-velocity fluid from shooting across the tray. The designs shown in Figures 10-8D and E can be used if there is likely to be vapor in the feed. These two designs will not allow excessive entrainment. Intermediate feed introduction is somewhat similar, and several common designs are shown in Figure 10-9. Low-velocity liquid feeds can be input ...

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