Produced Water Treatment
Removing oil and solids from oilfield produced water to meet reinjection or discharge limits, using staged gravity separation, coalescing, and polishing.
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Phase Separation
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CPI Oil-Water Separator
Corrugated-plate interceptor for gravity separation of free oil and settleable solids from produced and industrial water to < 10 ppm — compact, no moving parts.
Quick Answer
A CPI (Corrugated Plate Interceptor) Oil-Water Separator removes free oil and settleable solids from water by gravity, using closely spaced corrugated plates to shorten droplet rise distance. It achieves outlet oil-in-water below 10 ppm with no moving parts, in a footprint far smaller than an API separator.
System Overview
The CPI separator uses a pack of closely spaced corrugated plates to dramatically reduce the distance an oil droplet must rise before coalescing and being skimmed. This delivers API-421 performance in a fraction of the footprint of a conventional gravity separator.
Design & Construction
Carbon-steel or stainless tank, removable plate packs for cleaning, oil-skimming weir, sludge hopper, and optional gas blanket for hydrocarbon service. Available open-top or pressurised.
FAQ
When is a CPI preferred over an API separator?
When footprint is constrained and the duty is free-oil removal. The plate pack achieves the same separation in a much smaller vessel.
What about emulsified oil?
CPI removes free and dispersed oil. For emulsified oil below the gravity-separation limit, a downstream coalescer or flotation stage is added.
Available as
Project References
Selected installations — anonymised where naming clearance is pending.
300 m³/h produced-water CPI · onshore field · < 10 ppm outlet (anonymised)
Refinery effluent CPI pre-treatment · Gulf refinery (anonymised)
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