OFFSHORE EMERGENCY OIL SKIMMER
Offshore Emergency Oil Skimmer 'Force 7'. A large oil recovery device designed specifically to deal with offshore oil slicks. The use of floating mops quite simply means -'Lets Go Fishing For Oil'
The ‘Force 7’ Offshore Oil Recovery System applies the well proven principle of oil recovery by polypropylene mop fibre in the most efficient and economical way possible.
The system consists of four basic elements:
The Paravane is launched, using the hydraulic crane, and streamed on its control wires. By adjusting the control wires the paravane will naturally take station at any point on the quarter of the vessel. These wires then act as a guide for the front of the net, to ensure that it opens up in the correct shape, clear of the vessels’ side, at the optimum position for collecting oil. The paravane remains in position throughout the operation, while the net is repeatedly cast and recovered, using the following cycle:
1. The net is deployed astern. As the front of the net passes over the ship’s stern its outboard end is clipped to the aft paravane control wire. The head ropes continue to pay out, allowing the net to stream further astern while its’ mouth opens as it slips out along the wire.
2. Once the net is fully deployed it is left in position until saturated, the time needed for this will depend on the thickness of the slick the size of the windrows and the speed of the vessel.
3. Once the net is saturated it is recovered, passing through the squeeze rollers and scrapers as it is wound onto the storage drum. The recovered oil falls into the buffer tank from where it is piped to the storage transport tanks, (or Flexitanks) by the integral transfer pumps.
4. The cycle is then repeated. The average duration of the cycle is 9 minutes.
Projected recovery rates giving a guide to performance based on actual experience, and which assume constant encounter of oil at uniform thickness are as follows:
Force 7 Efficieny
The use of this principle already gives certain advantages which ensure operational efficiency:
These are enhanced by design features which ensure cost efficiency:
For a more descriptive look at how a Force 7 looks and operates go to the Force 7 image gallery.
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