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Alfa laval 阿法拉伐分油机说明工作原理详解S-type Chapter4, bowl function

– Interface / separated sludge
• If back pressure increased?
– Oil level inwards – Interface outwards – Water level inwards – Paring tube inwards
• If back pressure decreased?
Oil/water back pressure, tube position, Appendix 4
• Water paring chamber
– Low oil back pressure
– gives a large diameter water ring

Chapter 4. bowl function
– Displacement volume based on calibration of water flow at first start-up.

Chapter 4. bowl function
Inside the bowl at discharge -4
• Displacement continues • Paring tube moves in
Chapter 4. bowl function
question
• Which other separator for
Marine and Diesel use has the oil paring disc inside the top of the disc stack?
MSPX


Chapter 4. bowl function
Inside the bowl at discharge -6
• Conditioning water
is added , time is depending on calibration made at first start-up
Oil/water back pressure, tube position, Appendix 4
• Paring tube position
– large diameter gives high pressure
– tube out gives high pressure


Chapter 4. bowl function
Inside the bowl at discharge -2
• Feed off • Oil level • Water level

Chapter 4. bowl function
Chapter 4. bowl function
question
• No level ring! • Why has the level ring
been removed?
A level ring is not necessary in this separator design .

Inside the bowl at discharge -3
• 1 - Water outlet closed • 2 - Oil outlet closed
– opened at pressure increase signal from PT4 in oil outlet.
• 3 - Oil displaced
Oil/water back pressure, tube position, Appendix 4
• Paring tube
– free to move between inner and outer limits

Chapter 4. bowl function
– Oil column replaced by water - heavier
• Complete
displacement
• Tube flush

Chapter 4. bowl function
Inside the bowl at discharge -5
• After discharge • Empty bowl

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function
when there are no springs in the bowl?

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function
The operating mechanism
Chapter 4. bowl function

Chapter 4. bowl function
Product flow
• 1. Alcap
– Valve V 5 normally closed
• Conditioning water • 2. Oil flow
– Inlet – Paring chamber
• 3.Water / Sludge • 4. Paringtube position

Chapter 4. bowl function
Inside the bowl at discharge -1
• Dirty oil in
The operating mechanism

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function
The operating mechanism

Chapter 4. bowl function
Chapter 4. bowl function
question
• Why has the water
paring disc been replaced by a paring tube?
To avoid generation of heat in separator top


Chapter 4. bowl function
S type separator

Chapter 4. bowl function
The operating mechanism
• QUESTION, how do we push the operating slide against the bowl body
Chapter 4. bowl function
Oil/water back pressure, tube position, Appendix 4
• Paring tube position
– small diameter gives low pressure
– tube in gives low pressure
Paring tube
Seal ring
Discharge slide
Operating water ring

Chapter 4. bowl function
Bowl inlet and outlets
Inlet Oil outlet Water outlet

Oil/water back pressure, tube position, Appendix 4
• Water paring chamber
– High oil back pressure
– gives a small diameter water ring

Chapter 4. bowl function

Chapter 4. bowl function
IInnssiiddee tthhee bboowwll aatt ddiisscchhaarrggee --88
• Feed on • Water pushed out • Oil does not pass
top disk
disc
• No level ring • Centrishoot
– Complete displacement – Complete ejection – Clean bowl!

Chapter 4. bowl function
CentriLock
Inlet pipe Nozzle
• Bowl in running
condition

Chapter 4. bowl function
Oil/water back pressure, tube position, Appendix 4
• Previous separator models
– Increase oil back pressure increases water pressure – FOPX, water indicating pressure increases when recirc
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