High-Efficiency CPI Oil-Water Separator: Taking Industrial Oil-Contaminated Wastewater Treatment to New Heights

As industrial wastewater discharge standards become increasingly stringent, the effective treatment of oil-contaminated wastewater has become a major environmental challenge facing industries such as petrochemicals, machinery manufacturing, and steel metallurgy. To address this challenge, our company has independently developed and manufactured the CPI (Corrugated Plate Coalescence) oil-water separator, which, thanks to its highly efficient and stable oil-water separation performance, is becoming the equipment of choice for an increasing number of enterprises.

Based on the principles of shallow-bed sedimentation and coalescence separation technology, the CPI oil-water separator is a highly efficient oil-water separation device. Its interior is equipped with multiple sets of corrugated inclined plates. As wastewater flows between the plates, oil droplets rise to the underside of the plates under the force of gravity, coalesce into larger droplets, and rise to the water surface where they are collected; simultaneously, suspended solids settle onto the upper surface of the plates and slide down into the bottom sludge hopper. This ingenious design enables the CPI oil-water separator to achieve highly efficient separation of oil, water, and sludge within a short retention time.

Core Advantages

High Separation Efficiency

It can remove oil droplets larger than 30 microns from water, achieving an oil removal rate of 90%–95%, with the oil content in the effluent controlled below 10–30 mg/L. The corrugated plate structure significantly increases the coalescence area, promoting the coalescence of small oil droplets into larger ones and accelerating their rise to the surface.

High Shock Resistance

It is not sensitive to fluctuations in the oil concentration of the influent and is suitable for industrial wastewater with significant variations in operating conditions. It can treat wastewater with an oil content exceeding 1,000 mg/L.

Low Operating Costs

With no moving parts and relying entirely on gravity separation, energy consumption is extremely low. No chemical additives required (optional depending on water quality). Maintenance is simple, requiring only periodic oil and sludge removal.

Space-saving design

Compared to traditional oil separators, the footprint can be reduced by 50%–70%. Can be designed as above-ground or underground units to flexibly adapt to different site conditions.

Customizable solutions

Equipment materials: Corrosion-resistant carbon steel, stainless steel, fiberglass-reinforced plastic (optional)

Corrugated Plate Material: Polypropylene, stainless steel, fiberglass-reinforced plastic (optional)

Single-Unit Treatment Capacity: 5–500 m³/hour; scalable through parallel operation of multiple units

Can integrate lift pumps, oil-water separators, and sludge tanks into a single unit

Typical Applications

Petrochemicals: Oil-containing wastewater from refineries, tank cleaning wastewater, and process condensate treatment

Machine Shop: Cutting fluid wastewater, parts washing wastewater, emulsion treatment

Steel & Metallurgy: Steel rolling wastewater, cooling circulation water, lubricant leakage wastewater

Transportation: Oil-containing wastewater from railway maintenance depots, rolling stock depots, and car washes

Oil Terminals & Gas Stations: Rainwater from tank farms, ground washwater treatment

Food Processing: Edible oil production wastewater, food service wastewater pretreatment

Learn More

For detailed specifications of CPI oil-water separators, or to receive a customized solution and quote tailored to your water flow requirements, please contact us. We will provide professional technical solutions and product recommendations based on your water flow volume, water quality characteristics, and on-site conditions.

winnie@yihuaep.com