AN ANTI-POLLUTION SHIP CAPABLE OF RECOVERING OIL FROM THE SURFACE OF THE SEA EXISTS, BUT ONLY IN THE PROJECT STAGE

The AMOCO CADIZ disaster reminds us that France possesses a process for recovering oil from the high seas in 3 to 4 m swathes. The process was patented in 1975 by BJC, a firm of consultants, and designated VLIP (initial letters of a French phrase standing for "heavy vehicle for action against pollution"). The VLIP is a self-propelled barge and in the original design the water entered by an opening forward, passed through a series of settling tanks and, after purification, was ejected astern by pumps or jets. The quantity of water taken on limited the amount of oil that could be treated at any one time, so BJC introduced a system of stop flaps that followed the curve of the swell, skimming off the oil and reducing the quantity of water taken on board. Full-scale tests demonstrated the viability and efficiency of the flaps. The rate of oil recovery depends on a number of factors such as density, oil viscosity, temperature, size of emulsified droplets, etc. and the speed of the barge must be modified in accordance with the purification or recovery rate desired. Tests carried out at the Paris Model Basin showed that efficiency depends on the angle of entry and it was suggested that the flaps should be located in the ship side towards amidships. The vessel would travel at speed to the polluted area, where she would be positioned at an angle of 30--40 degrees to her longitudinal axis. The oil intake would be fitted with automatic flaps. A VLIP of some 40 m long could recover 600--700 sq m, and one 70 m long could take 2,000--3,000 sq m. It might well be possible to convert a 15 to 20,000-dwt tanker for the purpose, there being a number of this size at present laid up. A general arrangement plan of a proposed VLIP is included. Order from BSRA as No. 49,194.

  • Corporate Authors:

    Journal de la Marine Marchande

    190 Boulevard Haussmann
    75008 Paris,   France 
  • Publication Date: 1978-4-13

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00185298
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jan 13 1979 12:00AM