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Fuel pumps
Engine
S
Engine
Fuel pumps
Diesel engines consume Heavy Fuel Oil (HFO),Marine Diesel oil (MDO) or Intermediate Fuel Oil (IFO).
Modern Diesel engines are runon IFO, a fuel whose grade lies between that of HFO and MDO.
HFO is a residual oil that is made suitable for driving Diesel engines by adding certain flammable substances.
MDO is a high-grade fuel of low viscosity that is used when the vesselis manoeuvring.
Engine
Fuel pumps
HFO HFO MDO
From the Heavy Fuel Oil bunkertankthe preheated fuel is led to the settling tank.
Settling tank
In the settling tank water and impurities are separated from the fuel and drained off.
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Drain-valve
Engine
Fuel pumps
HFO HFO MDOSettling tank
Engine
Fuel pumps
HFO HFO MDO
From the settling tank the fuel is led through a heater to preheat the fuel.
From the heater the fuel is led through a separator (purifier / clarifier) to purify the fuel.
Engine
Fuel pumps
HFO HFO MDO
sound
Engine
Fuel pumps
HFO HFO MDO
From the separator the fuel enters the daily service tank for HFO.
There are two daily service tanks, so that one tank may be used while the other is being filled.
sound
Engine
Fuel pumps
HFO HFO MDO Daily service tank Daily service tank
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Engine
Fuel pumps
HFO HFO MDO
From the daily service tank the fuel is pumped to a heater by the low pressure fuel pump (or “booster pump”).
Engine
Fuel pumps
HFO HFO MDO
From the heater the HFO is passed through a viscosity regulator .
Engine
Fuel pumps
HFO HFO MDO
From the viscosity regulator the fuel is passed through a fuel strainer , which filters the fuel.
sound
Engine
Fuel pumps
HFO HFO MDO
From the fuel strainer the oil is led to the fuel pumps in the engine.
Diesel oil is used for manoeuvring and is stored in the MDO bunkertank.
Engine
Fuel pumps
HFO HFO MDO
After the DO has been pumped up fromthe bunkertank, the fuel passes througha purifier .
Engine
Fuel pumps
HFO HFO MDO
s
Engine
Fuel pumps
HFO HFO MDO
From the purifier the DO enters theDO storage tank.
s
Engine
Fuel pumps
HFO HFO MDO
From the DO service tank the fuel is led to the high-pressure fuel pumps in the engine.
A mixing tank is used for a gradual transition from HFO to DO.
sound
Mixing tank
Engine
Fuel pumps
HFO HFO MDO
sound
Buffer tank
(Circulating tank)
The mixing tank, or “buffer tank”, can hold a quantity of fuel which will be circulated and led to the engine.
Engine
Fuel pumps
HFO HFO MDO
s
Engine
Fuel pumps
HFO HFO MDO
The hot fuel fumes can escape through the air vent in the mixing tank.
Air vent
Modern Diesel engines are run on IFO, a fuel whose grade lies between that of HFO and MDO.
HFO is a residual oil that is made suitable for driving Diesel engines by removing certain flammable substances.
MDO is a low-grade fuel of high viscosity that is used when the vessel is manoeuvring.
…..because:
…..because:
1
From the Heavy Fuel Oil bunkertank the fuel is led to the settling tank.
2Engine
Fuel pumps
HFO HFO MDOSettling tank
In the settling tank the fuel is drained off after it has been separated from water and impurities.
3
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
From the settling tank the fuel is first led through a purifier and then through a separator.
4
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
From the separator the fuel enters the daily service tank.
5Engine
Fuel pumps
HFO HFO MDOSettling tank
There are two daily service tanks:one to preheat the fuel, the other to purify the fuel.
6
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
From the daily service tank the fuel is pumped to a heater by the booster pump.
7Engine
Fuel pumps
HFO HFO MDOSettling tank
From the heater the HFO is passed through a separator .
8
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
A fuel strainer preheats and filters the fuel.
9
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
From the fuel strainer the oil is led to the low pressure fuel pumps in the engine.
10
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
Diesel oil is used for manoeuvring and is stored in three daily service tanks.
11
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
After the DO has been pumped up from the bunkertank, it is passed through a purifier.
12Engine
Fuel pumps
HFO HFO MDOSettling tank
From the purifier the DO enters the settling tank.
13
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
14
From the DO service tank the fuel is led through a separator, heater, viscosity controller and strainer to the fuel pumps in the engine.
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
A mixing tank is used to drain off water and impurities from the fuel.
15
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
Mixing tank
The hot fuel fumes can escape through the air vent into the mixing tank.
sound 16
…..because:
Engine
Fuel pumps
HFO HFO MDOSettling tank
Mixing tank
C P.C. van Kluijven
SHIPPING AND TRANSPORT COLLEGE ROTTERDAM
