Separation system for immiscible liquids

Details Separation system for immiscible liquids Separation system for immiscible liquids

1998-10-31

2000-10-10

Upton, Christopher

Liquid purification or separation

With gas separator

210521, 2105321, 210539, 210540, 210DIG5, C02F 140

Patent

active

061298395

ABSTRACT:
A separation system (10) for immiscible liquids such as oil and water. The system is particularly useful for treating bilge water on ships. The system includes a bilge water holding tank (12), pre-filter tank (14), separator (16), oil accumulator (18), coalescer (20), air refining chamber (22), and pump (24). Oily water is drawn by pump (24) from holding tank (12) and is then processed sequentially through pre-filter tank (14), separator (16), and coalescer (20) and can thereafter be pumped overboard. Separator (16) and coalescer (20) are disposed at an inclined angle so that the oil will float upwards and out into oil accumulator (18) and refining chamber (22). At each stage in the process, oil is separated out from the water and accumulates at the surface of the water in pre-filter tank (14), oil accumulator (18), and refining chamber (22). Using a second pump (28), the accumulated oil can be intermittently or continuously pumped from these vessels into a waste oil holding tank (26). Separator (16) utilizes a plurality of spaced, perforated, polypropylene plates to control the flow of water through the separator and to accumulate and separate out the oil. Coalescer (20) includes an air scrubber (106) formed from a stack of annular polypropylene disks having ribs on each side that, when stacked, define a sinuous flow path between each pair of disks. Air injected into the water flows outwardly through air scrubber (106) and helps separate out the finer droplets of oil.

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