Offshore supply vessel at sea illustrating marine fuel and lubrication systems in operation.

Eliminated sludge production and water contamination on a supply vessel

Filtration of diesel fuel and engine lube oil replaced centrifugal separation and improved daily operation.

Case study written by Frank Hansen, Øwre-Johnsen AS, Norway, in cooperation with C.C.JENSEN A/S, Denmark

Application Snapshot

Factory icon representing industrial application or sector.

Industry:

Marine

Country:

Norway

Oil type:

Diesel fuel (MGO) and engine lube oil

Executive summary

Problems were experienced with water in the fuel and sludge production when the fuel was cleaned using a centrifugal separator. Sludge had to be separated into water and fuel oil, with water discharged through the bilge water separator and sludge burned in an incinerator.

After installing CJC® Filter Separator and Fine Filter solutions on the main engines, water was removed continuously from the fuel, sludge production was eliminated and the working environment in the engine room was significantly improved.

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Oil degradation icon representing elimination of sludge formation after filtration.

Sludge problem eliminated

No sludge production after installation of CJC® filtration solutions.

Improved working environment

Daily work in the engine room simplified and improved.

H₂O icon representing continuous removal of water from fuel or oil.

Continuous water removal

Water removed continuously from the diesel fuel.

Gear with checkmark icon representing simplified inspection and maintenance of the oil system.

Easy oil maintenance

Inspection and maintenance simplified, with short service time.

Marine engine room with large blue main engines on an offshore supply vessel.

Client brief

The supply vessel Far Solitaire, operated by Solstad Offshore in Norway, is equipped with three Rolls-Royce Bergen main engines.

Technician comparing dark contaminated oil and cleaner oil samples.

Challenge

The fuel was cleaned with a centrifugal separator, resulting in problems with water in the fuel and sludge production. Sludge had to be handled, water discharged through the bilge water separator and sludge burned in an incinerator.

CJC® filter insert mounted in a marine oil filtration system for contaminant removal.

Solution

A CJC® Filter Separator PTU 27/108 was installed on the fuel system of the main engines to remove water. In addition, three CJC® Fine Filters HDU 27/108 were installed on the engine lube oil systems, one filter per engine, to remove particles and other contaminants.

Engineers inspecting a marine oil filtration system used for fuel and lube oil cleaning.

Simplifying fuel and lube oil cleaning

After installation of the CJC® Filter Separator and Fine Filters, there was no more sludge production and water was removed continuously from the fuel. Burning of sludge generated by the centrifugal separator was no longer needed, and the bilge water separator was only used to separate bilge water.

The filtration units consist of pumps, a built-in water separator and oil filters, making the system easy to inspect and maintain.

Measurable results and operational impact

Installing CJC® Oil and Diesel Filter solutions eliminated sludge problems, removed diesel pest (microbes) and improved the working environment in the engine room. Maintenance was simplified, as engineers only needed to visually inspect the pressure gauges on the oil and fuel filters, and replacement of CJC® Filter Inserts including clean-up took approximately one hour.

“We are very happy with the fuel and lube oil filters. This is many times better and cheaper than separators. And this makes the daily working environment for the engineers in the engine room much better.”

– Roger Johansen, Chief Engineer

CJC® filtration unit installed in a vessel engine room for continuous fuel and lube oil cleaning.

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