Definitions

Tray Area Definitions Some of these are illustrated in Fig. 14-17.

Total tower cross-section area AT The inside cross-sectional area of the empty tower (without trays or downcomers).

Net area AN (also called free area) The total tower cross-sectional area AT minus the area at the top of the downcomer ADT. The

TABLE 14-4 Equipment for Liquid-Gas Systems

Equipment designation

Mode of flow

Gross mechanism

Continuous phase

Primary process applications

Tray column

Cross-flow, countercurrent

Integral

Liquid and/or gas

Distillation, absorption, stripping, DCHT, washing

Packed column

Countercurrent, cocurrent

Differential

Liquid and/or gas

Distillation, absorption, stripping, humidification,

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