Alfa laval module 103 maintenance and startup of oil purifier

1. Oil Centrifuge
Alfa Laval
WAQAR AHMED
HUBCO POWER PLANT

2. Contents
 Working principle
 Benefits
 Oil path
 Parts
 Maintenance
 Troubleshooting
 Start up
 Safety of machine

3. Alfa Laval
Disc –Bowl type(module 103)

4. Working Principle

5. Working principle
 The separation principle of high-speed
centrifuge works on centrifugal force
with differing specific
gravity between two different liquids. ...
Because of the difference in Specific Gravity,
the oil will float on top of the water.
The solid particles that is heavier
than water will sink down.

6. Working principle

7. Benefits

8. Benefits
 its ability to clean both solids and water contaminants.
 Removes water, abrasive metal fines and other particles as small as 2 μm
 Plug-and-play module for easy installation
 No plant redesign required
 Disc stack technology speeds up the separation process
 This will reduce machine wear a minimum of 40 - 50%.
 Low cost & High performance

9. Oil Path in
Centrifuge

10. Oil Path (oil entering from A)

11. PARTS

12. Bowl Construction

14. Worm & worm gear
Worm gear drives are typically used for
transmission of power between two
non-parallel and non-intersecting shafts.
Advantages of Worm Drives:
 Worm gear drives operate silently
and smoothly.
 They are self-locking.
 They occupy less space.
 They have good meshing
effectiveness.
 They can be used for
reducing speed and increasing
torque.

15. Friction Clutches
A friction clutch has its principle application in the transmission of power of
shafts and machines which must be started and stopped frequently.
Advantages of friction clutch
Its engagement is smooth.
Low cost & long life
No heat generation.
Once engaged there is no slip.
In same cases it works as safety devices
because it gets disengaged when
torque crosses safety limit.

16. Gear Pump
Gear pumps are the most common type of positive displacement pump. They
are ideal for transferring high viscosity fluid

17. Rotating bowl brake
Brake pads are
using in shutdown
of machine

18. Routine Maintenance of centrifuge

20. Troubleshooting

21. Water seal break
 Low level of water
 Water and oil mix
 Discs are not fitted properly
 improper size of gravity disc
 Gravity disc O’ring leakage
 low RPM of bowl
 Worm wheel connecting pin broken
 discharge valve open before achieving temp.

22. Machine not achieving RPM
 The discs / bowls filled with dirt.
 The friction pads are slipped/damaged
 The bearings are damaged
 The worm & worm wheel gear teeth damaged

23. Overloaded machine
 The bowl filled with dirt
 Extra tightening of belt
 The gears have improper backlash
 The suction strainer blockage
 Extra inlet opening dump the clean oil
Gear box problems:
 Oil level increasing
 Worm wheel connecting pin broken
 Lip oil seal leakage
 Worm wheel teeth worn out

24. Centrifuge not removing moisture
 The heater is not working
 The disc/bowl are dirty
 Extra opening of inlet oil
 Gravity disc have not good condition
Low oil flow
 The suction strainer chocked.
 Air trap in suction line
 The gear pump bushing clearance increases

25. Vibration
 The machine bearings are damaged
 Motor rotating in opposite direction
 The bowl is filled with sludge
 The bowl assembly loosen
 Foundation is not tightened
 Foundation rubbers are damaged
 Centrifuge trolley is not on proper place

26. Gear pump troubleshooting
 Wrong rotation of machine
 Gear pump not getting proper suction
 Gear pump coupling pin broken
 Gear pump abnormal sound
 Gear pump bush clearance increases
 Pump lip oil seal damaged

27. Start up

28. Steps
 ON the power button
 Start the separator until it gets full RPM
 Fill the water for water sealing until it comes out from vent
 open the suction valve
 Start the heater, wait to achieve the temp
 Open the oil product valve
 Regulate and adjust the product valve as per requirement.
 Ensure oil is not dumping from dirty oil way, if any abnormality readjust
product valve
 Inspect the centrifuge intermittently

29. Safety measures

30. Oil centrifuge safety
 It is a very high speed rotating machine, maximum RPM goes up to 9510.
 Don't open any cover during machine is rotating, as it takes several minutes to
stop after power cut off.
 We need to be very conscious during its assembling, as any loose part can damage
machine.
 It may cause a big accident, damaging equipment and persons operating or
observing its operation.
 Make sure of all fasteners are well in position and tightened properly, as it may
cause oil spill.
 Electrical hazard are always there.
 Take care of high temperature oil and heaters.
 Don’t move the trolley in operation.

31. Any Question?

32. Thank you