Page 185 - Petroleum and Gas Field Processing

For T ¼ 105 F
1200 20
2 Q o o 2
D ¼ 6665 ¼ 6665 2 ¼ 4476 in:
ð
Þd m 0:2ð423Þ
D 105 ¼ 66:86 in:

For T ¼ 85 F
1200 10 2
2
Q o o
D ¼ 6665 ¼ 6665 ¼ 3155 in:
2
ð
Þd m 0:2ð356Þ
D 125 ¼ 56:17 in:
Now, use Eq. (17) for the retention time constraint:
2
D H ¼ 8:575Q o t ¼ 8:575 1200 20 ¼ 205,800 in: 3
Assume different values for D and determine corresponding values of H
from the above relation. The results are plotted as follows:

From the figure, all diameters and heights that fall below the retention time
curve are not acceptable. For the three treating temperatures, a coalescing
section height equal to the value at the intersection with the retention time
curve, or larger, will satisfy both retention time and settling constraints.
A reasonable selection will be a treater with a 66-in. diameter and a

60-in. coalescing section height. The treating temperature will be 105 F,
with the possibility of treatment being at lower temperatures in reality.

Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.