Page 271 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition
P. 271
Mechanical Separations 243
Decanter 4
light phase
Drain interface
6.-
for emulsion
Heavy phase out
f l
A
4
Figure 4-12. Gri?ivity decanter basic dimensions. Adapted by permission, Schweitzer, P.A., McGraw-Hill Book Co. (1 979) [32].
Vessel heads bend or tangent
lines
Partial baffle at interface clear
top by 0.3D and be 1’4”
vertical height only &trial outlet nozzles, one at
estimated interface
Vessel Weld line
Tee on feed inlet -
Velocity = 0.5-l’sec
Baffle, solid except top 6” with c
erforated underflow baffle, \ 1“ perf. holes on 1.5% A
holes area approx = outlet areas Water phase out. Perforated
height at estimated baffle, set min. 6” off bottom,
with min. lh’’ holes, tee interface 24” from bottom, 2 to 3 times nozzle diameter
sealed at bottom
Figure 4-13. Decanter for Example 4-1.
