Skirt height

Very stable and easy to control. Has no two-phase flow. Allows low tower skirt height. This type is expensive, however. 

Vertical once-through One theoretical tray Simple piping and compact Not easily fouled Less cost than kettle Difficult maintenance High skirt height No control of circulation Moderate controllability... 

Not easily fouled Lower skirt height than vertical Less pressure drop than vertical Longer tubes possible Ease of maintenance Less cost than kettle High skirt height... 

Horizontal natl. circ. Ease of maintenance Lower skirt height than vertical Less pressure drop than vertical Longer tubes possible Less cost than kettle No theoretical tray Extra space and piping as compared to vertical Fouls easier as compared to vertical Accumulation of higher boiling point components in feed line, i.e., temperature may be slightly higher than tower bottom... 

Skirt height High High Lower Lower... 

Reflux ratio Tray spacing Skirt height... 

The skirt diameter is equal to the diameter of the column, and its height varies from 2 to 12 ft (0.61 to 3.66 m). The height of the skirt is determine by maintenance requirements. Maintenance workers need space to repair the bottom section of a colinnn. Columns could also be supported on a stracture. Assume that the skirt height for the absorber, Lai, in Figure 5.4.2, is 2.0 m (6.56 ft). 

The elevation for the suction side of the pump consists of the sum of the stripper-skirt height and the liquid level at bottom of the stripper. Again, assume that the skirt height is 2.0 m (6.56 ft). 

Dg = Skirt Diameter Dy = Vessei Diameter Hg= Skirt Height Hy = Vessei Height Dg = Vapor Exit Diameter Dq= Liquid Drain Diameter Dg = False Bottom Diameter... 

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