Alfa Laval S 921 - Separating Function; The Liquid Balance in the Bowl

4 Design and function 4.5 Separating function
4.5 Separating function
The separator separates water and solids from
the uncleaned oil. Water normally leaves the
separator through the water outlet. During
sludge discharge, solids (sludge) and water are
removed through the discharge ports.
4.5.1 The liquid b alance in the bowl
The liquid levels in the bowl depend on many
factors (bowl geometry, liquid densities, flow
rates etc.). To get a picture of how the liquids
are distributed in the bowl, imagine that the bowl
is at standstill and turned 90° (only influenced
by gravity). The bowl can now be compared
with a settling tank:
1
2
3
1
2
3
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4
7
A
B
G0886481
A. Separator bowl turned 90º
B. Settling tank
1. Unseparated oil
2. Sepa rated oil
3. Separated water
4. Top disc
5. Oil/water interface
6. Distributor
7. Gravity
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