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Marine Oily Handling Devices and Pollution Prevention

Marine Oily Handling Devices and Pollution Prevention. Chapter 6 Lesson 5 Cleaning the Comyn oil/water Separater. 6.5 Cleaning the Comyn oil/water Separater.

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Marine Oily Handling Devices and Pollution Prevention

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  1. Marine Oily Handling Devices and Pollution Prevention Chapter 6 Lesson 5 Cleaning the Comyn oil/water Separater

  2. 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. • Pump clean water slowly through the separator, and occasionally open oil recovery valve to free the separator of any oil that is present. Use hand control cock during this operation to open and close oil recovery valve as required.

  3. 6.5 Cleaning the Comyn oil/water Separater • Finally, open drain cock to bilge and continue to pump clean water into the separator for a short period. Close valve and leave the separator full of clean water at all times.

  4. 6.5 Cleaning the Comyn oil/water Separater • The automatic control system associated with all sizes of Comyn Separator consists of a transistorized level controlunit, actuated by a probe mounted horizontally within the oil recover dome. • The level control unit which incorporates indicator lights, is mounted, together with an ‘on/off’ fused switch, alarm bell and terminal box, on a suitable panel attached to the separator shell. • The control panel is sometimes mounted at some position away from the separator. The actuation of the level control unit directly governs the opening and closing of the diaphragm operated pressure closing type oil outlet valve, via a suitable solenoid pilot control valve, which is also mounted on and pre-wired to, the control panel.

  5. 6.6 Coalescing bed-type oily water separators

  6. CYF-B

  7. Principle • Oily water is pumped through a non-return valve in the inlet to the separator; it enters the outer annular space and flows vertically upwards towards the primary collection zone where the larger globules of oil, which separate easily by gravity, collect. • The water then flows downwards through the inner annular space into the bottom of the separator, through ports into the coalescing bed at a very low speed when the oil adheres to the granular material in the bed and forms, in effect, a climbing film which moves upwards through the bed at a slower speed than the water. • The top of the bed is covered by a perforated plate. When the oil reaches the underside of this plate it flows through the perforations and due to its viscosity and surface tension, begins to form globules which increase in size until they have sufficient buoyancy to float upwards at a faster rate than the water and collect in the secondary zone while the water flows through the water screen and into the outlet pipe.

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