Marine Installation Manual 2022-03 4-91
4 Ancillary Systems
4.9 Leakage collection system and washing devices
X62DF-S2.0
Figure 4-53 Design proposal of WinGD’s sludge oil trap
Operation of the
sludge oil trap
For monitoring the operation of the sludge oil trap, WinGD recommends
checking the solids level in the sludge oil trap. The solids level can be assessed by
opening the ‘Test valve A’ (see Figure 4-53). There must be an oil flow as other-
wise the dirt will have accumulated above the maximum level. If there is no oil
flow, then immediate sludge removal is required. The liquids level can be
checked by opening the ‘Test valve B’ (see Figure 4-53). There must be an air
flow, as this indicates that the oil drain is working properly. If instead there is an
oil flow, this would indicate that the orifice of the overflow pipe is blocked and
requires manual cleaning.
For manual sludge removal, partially unscrew and lift the cover to first drain the
liquid to a tray, and then fully open the cover and manually remove the sludge.
Solution 2: A manually bottom-drained sludge oil trap
Solution 2 description
For the manual bottom-drain solution, there is no continuous drain to the sludge
oil tank. The advantage of this solution is that it keeps the scavenge air loss to a
minimum, while at the same time it ensures that the sludge oil tank is not at all
pressurised during normal operation.
SM-0035
External
heating coil
Insulation
To sludge oil tank
AB
AB
Test valve A: For checking the solids level
(correct, if there is oil flow)
Test valve B: For checking the liquids level
(correct, if there is air flow)
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