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Industrial Oil Separators
The Oilsep is a compact clarifier which uses inclined plates to remove suspended solids and free oil from wastewater.
How It Works
Waste water enters the inlet nozzle into an enlarged coalescing section. This coalescing section is where heavier solids and sludge settle out of the waste water to the bottom of the vessel where it is discharged through the clean out nozzle. Waste water then flows through the perforated distribution baffle plate.
After it is evenly dispersed, it flows down through the plate pack where oil rises to the top of the corrugations and coalesces with other oil droplets. The large oil droplets rise up through the plate pack to the oil/water interface. Coalesced oil will flow over an internally adjustable oil weir and is removed through the oil outlet nozzle. Light solids and sludge separation is simultaneously accomplished within the pack by settling to the bottom of the corrugations where solids are directed to the sludge drain.
The flow out of the plate pack travels upward and spills over a fixed water weir, then exits the vessel through the water outlet nozzle for further downstream treatment or disposal.
Oilsep are available with a variety of pack lengths and angles and are tailored to the specified duty. They can be configured to meet a wide variety of capacities and condition and can be integrated with many other unit operations to provide a total solution to a water treatment problem.
CORRUGATED PLATE INTERCEPTOR
At the heart of the Oilsep is the Corrugated Plate Interceptor (CPI) plate pack. The plate pack design minimizes the distance a free oil droplet must rise before coming into contact with other oil droplets. This design ensures that the oil droplets coalesce on the undersides of the corrugated plates, facilitating the free oil removal process.
Oily water enters the CPS unit to the influent receiving compartment. Here, the velocity is slowed and the flow is directed into the quiescent zone above the CPI pack(s). Gross, free oil droplets rise, and the flow containing residual small free droplets and solids particles enters the CPI in a laminar flow condition.
The CPI pack is uniquely designed to increase the separation surface area by using a series of parallel plates, arranged to allow small, free oil droplets to coalesce and separate from the carrier fluid. Separation is based on the differences in the specific gravities of the fluids and the liquid temperature. Separated oil rises to the peaks of the corrugations in the parallel plates, then moves upward along these peaks to the top of the pack. As the separated oil is diverted to the top of the separator, it is protected from the flow entering the CPI by a gutter. At the top of the unit, the separated oil forms a layer and is skimmed by an adjustable trough or weir.
The clean effluent flows upward through the clear effluent compartment, then over the adjustable effluent weir and out of the separation unit. Separated solids in the CPI pack flow down the valleys of the corrugations to the bottom of the CPI pack. Another gutter shields them from the flow leaving the plate pack compartment. The use of a down-flow pack configuration ensures the entire water phase passes through the plate pack. Because the pack is positioned at a 45ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚º incline, separation is enhanced and the risk of plugging the media is minimized.