The rigid sweeping arm consists of 2 pontoons, which give the arm its floating capacity, and a bridge piece, for guiding the oil.
The inside pontoon (the one directly next to the ship) contains a pump for discharging recovered oil.
The design and dimensions of the pontoons give the rigid sweeping arm stability, even in rough seas.
The rigid sweeping arms are deployed directly next to the ship. When the vessel is moving forward, the oil will be guided between the ships hull and the rigid sweeping arm, to the oil collection chamber in the sweeping arm. The height of this oil collection chamber is hydraulically adjustable depending on the thickness of the oil layer. This feature means the amount of water entering the oil collection tank can be minimised to 30%.
The oil/water mixture is then pumped on board through an oil tranfer pump. This special pump has an impeller combining the properties of a screw pump with those of a centrifugal pump. This makes the pump suited for high viscous oils and at the same time, less sensitive for debris.
On board the vessel, the oil/water mixture will be separated through the difference in specific weight, whereafter the water can be pumped overboard. The recovery off spilled oil can continue until the tanks on board the vessel are completely filled with oil.
Recently, we have developed an interchangeable oil collection chamber equipped with a brush conveyor skimmer cassette and a pump. The complete oil collection chamber with brush conveyor skimmer cassette and pump replaces, in minutes, the existing oil collection chamber with the MSP 150 pump mounted in our rigid sweeping arm. The brush conveyor skimmer cassette can also be height adjusted using the same features as our existing oil collecting chambers.