 |
| Marine Purifier Parts and Functions |
Purpose of multi-disc inside the purifier
- Separate the liquid into a thin layer & create a shallow settling distance between discs.
- Improving separation of oil from heaver liquids & solids particle
Paring disc
- It is a stationary impeller mounted in a chamber at the neck of the bow.
- Its function is to convert the rotating energy of the liquid into a pressure head.
Choosing the correct
size of gravity disc
- The correct size is selected using:
- Separation temperature
- The density of oil at this temperature
- Desired throughput of oil and by using of nomogram from the purifier manual.
Adjusting purifier
bowl height
- By shim by bowl body
Effect of the reduced
purifier bowl height
- Oil goes through the water outlet.
Sealing water purpose
- To seal the water outlet & to prevent the overflow of oil from the water outlet.
Water washing
- Water washing is a widely used technique to remove acids, salts, and other impurities from the oil.
- The oil must be straight mineral oils or without dispersant additive oils.
- Water should be injected into the oil before purifying at a rate of between 3 to 5% of the oil flow that continuously renews the water seal in the purifier bowl.
- The oil temperature should be around 75 °C and the water temperature about 5 °C higher than the oil.
- It can be done continuously or intermittently.
Steam jetting
- By blowing steam into the engine lube oil just pair to its purification.
- Coagulation of colloidal carbon will occur.
- Purifiers will remove this carbon more effectively.
- Open up the purifier and set the blind disc at the bottom of the disc stack.
- The water outlet is blocked by a seal on the gravity disc.
- Blank off the sealing water inlet line.
Change purifier from
HFO to DO
- Replace the gravity disc, which is smaller than the heavy oil
- Open heater bypass valve.
- Close the FO heater steam in/out valves.
- Open heater drains v/v.
- Pure DO purifier cannot change to HFO, it has no heater.
- A pure clarifier cannot change to a purifier, it has no water outlet.
Cause of excessive
vibration on the purifier
- Sludge too much inside the bowl
- Foundation damper & spring failure
- Bearing failure
- Worn gear
- Uneven wear of the frictional clutch
- Motor speed too high or too low
Reasons for purifier
overflow
- Incorrect purifier disc size (inside diameter too large)
- Too low fuel oil temperature
- Too much rate of throughput
- Too much sludge inside the bowl
- Low speed (rpm) of bowl rotation
- Sealing water failure
- Operating water failure
- Worn out a main sealing ring
The purifier is not building
up speed while running
- Improper touching with friction clutch (worn out frictional clutch)
- Touching with break
- Excessive sludge in the bowl
- Bearing failure
- Motor running at overload
- One phase power failure (Single phasing)
- Sump oil level too high
- The vertical shaft and horizontal shaft are out of alignment
Needs to update more please write us at marinersight@gmail.com