1 / 10

A Report upon Increased Effectiveness of CRUDE OIL WASHING (CRUCLEAN)

INTERTANKO International Association of Independent Tanker Owners Safe Transport, Cleaner Seas, Free Competition. A Report upon Increased Effectiveness of CRUDE OIL WASHING (CRUCLEAN). CRUCLEAN Project Objectives and Deliverables.

dorian-caldwell
Download Presentation

A Report upon Increased Effectiveness of CRUDE OIL WASHING (CRUCLEAN)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INTERTANKO International Association of Independent Tanker Owners Safe Transport, Cleaner Seas, Free Competition A Report upon Increased Effectiveness of CRUDE OIL WASHING (CRUCLEAN)

  2. CRUCLEAN ProjectObjectives and Deliverables • By use of the sludge data from CRUCOGSA examine the impact pressure from a COW machine during operation. • Undertake alternative impact pressure measurements with differing nozzles and differing delivery pressures. • Optimise COW Machine operational criteria to increase washing effectiveness and reduce the evolution of VOC from wash stock.

  3. CRUCLEAN ProjectExample of Sludge Yield Stress

  4. CRUCLEAN ProjectMeasurement Record

  5. CRUCLEAN ProjectJet Appraisal

  6. CRUCLEAN ProjectObservations – Operating Pressure • Irrespective of nozzle size the operating pressures currently required (8 kg/cm2) produce an impact pressure well in excess of the Yield Stress of typical sludge. • Conclusion – operating pressure can be reduced.

  7. CRUCLEAN ProjectAssessment of impact area • The direct impact area for one cycle of an existing COW machine is approx 7.6%. (this excludes “splash zone” and therefore reduced impact pressure) • By increasing nozzle size from the current 30 mm to 45 mm, the impact area is increased to 30.5% for one cycle of the machine.

  8. CRUCLEAN ProjectNozzle Flow Rates • By increasing the flow rate into the cargo tank the final blend of sludge and COW stock will decrease to more flow/pumpable viscosities. • Flow rate into the cargo tank is determined as a function of either delivery pressure and/or nozzle size.

  9. CRUCLEAN ProjectVapour Generation • Vapour generation during washing has two primary consequences: • Loss of solvent that will dissolve sludge • Generate VOC gases that will be displaced to atmosphere during loading of next cargo. • In order to decrease vapour generation a maximum operating pressure of 5 bar should be observed.

  10. CRUCLEAN ProjectInterim Conclusions • In order to increase effectiveness of a COW operation and reduce VOC emissions • the nozzle pressure should be reduced to below 5 bar (roughly kg/cm2) and; • the COW machine nozzle should be increased to a size compatible with the tank size (jet reach)

More Related