6 Oil Water Separators
6 Oil Water Separators
Introduction Oil/water separators are necessary aboard vessels to prevent the discharge of oil overboard when pumping out bilges, deballasting or when cleaning oil tanks. The requirement to fit such devices is the result of international legislation The need for such legislation is that free oil and oily emulsions discharged in a waterway can interfere with natural processes such as photosynthesis and re-aeration, resulting in destruction of the algae and plankton so essential to fish life
Introduction • Oil/water separators are necessary aboard vessels to prevent the discharge of oil overboard when pumping out bilges, deballasting or when cleaning oil tanks. The requirement to fit such devices is the result of international legislation. The need for such legislation is that free oil and oily emulsions discharged in a waterway can interfere with natural processes such as photosynthesis and re-aeration, resulting in destruction of the algae and plankton so essential to fish life
Introduction Inshore discharge of oil can cause damage to bird life and mass pollution of beaches. Ships found discharging water containing more than 100 mg/litre of oil or discharging more than 60 litres of oil per nautical-mile can be heavily fined, as also can the ship's master. In consequence it is important that oil/water separators are correctly installed, used and maintained
Introduction • Inshore discharge of oil can cause damage to bird life and mass pollution of beaches. Ships found discharging water containing more than 100 mg/litre of oil or discharging more than 60 litres of oil per nautical-mile can be heavily fined, as also can the ship's Master. • In consequence it is important that oil/water separators are correctly installed, used and maintained
6.1 Principle of operation
6.1 Principle of operation
6.1 Principle of operation The principle of separation by which all commercially available oil/Water separators is the gravity differential between oil and water In oily water mixtures. the oil exists as a collection of almost spherical globules of various sizes. The force acting on such a globule causing it to move in the water is proportional to the difference in weight between the oil particle and a particle of water of equal volume. This can be expressed as
6.1 Principle of operation • The principle of separation by which all commercially available oil/Water separators is the gravity differential between oil and water. • In oily water mixtures, the oil exists as a collection of almost spherical globules of various sizes. The force acting on such a globule causing it to move in the water is proportional to the difference in weight between the oil particle and a particle of water of equal volume. This can be expressed as: