海洋环境化学电子教案，英文版课件： Chap.1 Mechanisms and problems of marine pollution.ppt Chap.2 Marine oxygen-demanded organic pollution.ppt Chap.3-5 Marine eutrophication and Red tide.ppt Chap.6 Marine eutrophication and Red tide(case study).ppt Chap.7-8 Oil pollution of the sea.ppt Chap.9 Maine Persistent Organic Pollutants (POPs) pollution.ppt Chap.10 Heavy metal contamination in the sea.ppt Chap.11 Marine radioactive and thermal pollution.ppt Chap.12 The protection of marine environment.ppt

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In motorships the oil, after passing through main and motion bearings and oil-cooled pistons, etc., is either retained in the bedplate or flows by gravity to a sump tank. In either case, the oil pumps, which may be self￾priming, submerged centrifugal or rotary positive displacement, draw the oil through magnetic strainers and discharge to: filters - oil coolers - engine lubricating and/or cooling manifolds

6.5 Cleaning the Comyn oil/water Separater To clean out the separator ensure that all oil possible has been drawn off through the oil recovery valve and scum valve, and that the separator is full of water. Turn on steam to heating coil; also steaming out connection, and allow the separator to become thoroughly hot

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:

8.1 Function and components of lubrication system 润滑系统的功用与组成 8.2 Lubricants 润滑剂 8.3 Oil pumps 机油泵 8.4 Oil filters 机油滤清器 8.5 Heat transmitters (Oil cooler) 机油冷却器

To ensure good combustion in diesel engines and reduce wear and corrosion in this type of engine it may be necessary to remove certain impurities from fuel and lubricating oils. These include ash, various salts and water present in fuel oil and carbonaceous matter, metals, acids and water present in used lubricating oil. carbonaceous