Page 148 - Applied Process Design For Chemical And Petrochemical Plants Volume II

Distillation 137

Area 0 -
Weir

\
inlet Downcomer Downcomer Note: Elliptical
(With or Without Shoves also used.
Weir or Seal BOX)

Cross -Flow Cross - Flow Cross- Flow

Inlet Downcorner Inlet Downcomer Inlet Downcomer

Boff le Weir

Outlet @ Downcomer
Cctlct Downcomer Outlet Dow'ncorner 'Weir

Reverse - Flow Double - Pass Double- Poss Cascade Figure 8-84. Tray types by liquid paths.

Table 8-13
Guide for Tentative Selection of Tray Type
Range of Liquid Capacity, GPM

Estimated
Tower Dia. Reverse Cross Double Cascade
ft. Flow Flow Pass Double-Pass
3 0-30 30-200 .... ....
4 0-40 40-300 .... ....
6 0-50 50-400 400-700 ....
8 0-50 50-500 500-800 ....
10 0-50 50-500 500-900 900-1,400
12 0-50 50-500 500-1,000 1,000-1,600
15 0-50 50-500 500-1,100 1,100-1,800
20 0-50 50-500 500-1,100 1,100-2,000
Used by permission, Bolles, W. L., Petroleum Procming, Feb. thru May Figure 8-85. Classification of tray area. Used by permission, Bolles,
(1956). W. L., Petroleum Processing, Feb. thru May (1956).