Table Achievable contents of foreign matter and water (after separation)
shows the prerequisites that must be met by the separator. These limit val-
ues are used by manufacturers as the basis for dimensioning the separator
and ensure compliance.
The manufacturer's specifications must be complied with to maximize the
cleaning effect.
Application in ships and stationary use: parallel installation
One separator for 100% flow rate One separator (reserve) for 100% flow
rate
Figure 1: Arrangement of heavy fuel oil cleaning equipment and/or separator
The separators must be arranged according to the manufacturers' current
recommendations (Alfa Laval and Westphalia). The density and viscosity of
the heavy fuel oil in particular must be taken into account. If separators by
other manufacturers are used, MAN Diesel & Turbo should be consulted.
If the treatment is in accordance with the MAN Diesel & Turbo specifications
and the correct separators are chosen, it may be assumed that the results
stated in the table entitled
Achievable contents of foreign matter and water
for inorganic foreign matter and water in heavy fuel oil will be achieved at the
engine inlet.
Results obtained during operation in practice show that the wear occurs as a
result of abrasion in the injection system and the engine will remain within
acceptable limits if these values are complied with. In addition, an optimum
lube oil treatment process must be ensured.
Definition Particle size Quantity
Inorganic foreign matter
including catalyst particles
< 5 µm < 20 mg/kg
Al+Si content – < 15 mg/kg
Water content – < 0.2 vol.%
Table 2: Achievable contents of foreign matter and water (after separation)
It is particularly important to ensure that the water separation process is as
thorough as possible as the water takes the form of large droplets, and not a
finely distributed emulsion. In this form, water also promotes corrosion and
sludge formation in the fuel system and therefore impairs the supply, atomi-
sation and combustion of the heavy fuel oil. If the water absorbed in the fuel
is seawater, harmful sodium chloride and other salts dissolved in this water
will enter the engine.
Water
Specification of heavy fuel oil (HFO) D010.000.023-05-0001
General
2017-07-11 - de
010.000.023-05
MAN Diesel & Turbo
8 (13) D010.000.023-05-0001 EN
To Next Page
Loading...
Need help?
General
