Oil Purifier Unit
1. Oil Purifier Unit Application
The oil purifier unit is intended for marine and land applications. It is specifically designed for cleaning of mineral oils from water and solid particles (sludge). The cleaned oil is discharged continuously, while the sludge is discharged at intervals.
The separator handles the following types of lubricating oils and low viscosity fuel oils:
Distillate (viscosity 1.5-5.5 cSt/40℃)
Marine diesel oil (viscosity l3 cSt/40℃)
Intermediate fuel oil and heavy fuel oil (viscosity 30-380 cSt/50℃)
Lubricating oil of R & O type, detergent or steam turbine.
The separator can be operated either as a purifier or as a clarifier. When operated as a purifier the separator discharges the separated water continuously.
When the oil contains only small amounts of water the separator is operated as a clarifier, discharging the water together with the solid particles.
The separator has to be installed together with devices for control of its operation.
2. Oil Purifier Unit Design
The marine oil separator comprises a frame consisting of the frame lower part, the intermediate part and the frame top part with a frame hood.
The separator bowl is driven by an electric motor via a flat-belt power transmission and bowl spindle. The motor drive is equipped with a friction coupling to prevent overload.
The bowl is of disc type and hydraulically operated at sludge discharges. The hollow bowl spindle features an impeller which pumps closing water from a built-in tank to the operating system for sludge discharge.
The main inlets and outlets are shown with their connection numbers in the illustration.
3. Sludge Discharge Function of Oil Purifier Unit
Sludge is discharged through a number of ports in the bowl wall. Between discharges these ports are covered by the sliding bowl bottom, which forms an internal bottom in the separating space of the bowl. The sliding bowl bottom is pressed upwards against a sealing ring by force of the closing water underneath.
The sliding bowl bottom is operated hydraulically by means of operating water supplied to the discharge mechanism from an external freshwater line. Opening water is supplied directly to the operating system in the bowl while closing water is supplied to the built-in closing water tank, and pumped to the operating system through the bowl spindle.
The opening and closing only takes a fraction of a second, therefore the discharge volume is limited to a certain percentage of the bowl volume. This action is achieved by the closing water filling space above the upper distributor ring and pushing the sliding bowl bottom upwards. Simultaneously, the water in the chamber below the operating slide is drained off through the nozzles in the bowl body.
Bowl opening
The key event to start a sludge discharge is the downward movement of the operating slide. This is accomplished by supply of opening water to the discharge mechanism. Water is drained off through nozzles in the bowl body. The sliding bowl bottom is rapidly pressed downwards by the force from the liquid in the bowl, opening the sludge ports.
Bowl closing
After the sludge is discharged the sliding bowl bottom is immediately pressed up and the sludge ports in the bowl wall are closed.
4. Oil Purifier Unit Process Principle
5. Certificates of Oil Purifier Unit: CCS, BV.
