CPI Corrugated Plate Assemblies – Core Components for High-Precision Oil-Water Separation

In the field of industrial oily wastewater treatment, dynamic separation equipment such as DAF and hydrocyclones are widely used, while static separation represented by CPI (Corrugated Plate Interceptor) assemblies is an indispensable core link in the pretreatment process. With pure physical separation, zero chemical addition, low energy consumption and compact structure, CPI corrugated plate components efficiently remove free oil and dispersed oil in wastewater, laying a solid foundation for the stable operation of subsequent fine treatment equipment, and are widely used in petrochemical, coal chemical, marine engineering and new energy industries.

Working Principle of CPI Corrugated Plate Assembly

CPI corrugated plate assembly is a professional static oil-water separation module based on shallow pool sedimentation theory and fluid dynamics. The equipment consists of a group of corrugated plates arranged at a specific inclination angle and spacing. When oily wastewater flows slowly through the plate gap, the corrugated structure increases the collision probability of tiny oil droplets and plate surfaces, maintaining stable laminar flow state.

Under the action of buoyancy, tiny oil droplets collide, adsorb and coalesce on the plate surface, gradually growing into large-size oil droplets and floating up rapidly to complete separation; solid suspended impurities slide down along the inclined plate surface and settle at the bottom. The whole process relies purely on gravity and fluid action, no external energy and chemical reagents are needed, which is a typical green and efficient physical separation technology.

Key Structural Parameters and Technical Advantages

1. Optimized Structural Design

Brator CPI corrugated plate assemblies adopt 45°-60° inclination angle and 6-20mm adjustable plate spacing, which not only ensures the smooth floating of oil droplets and self-cleaning sliding of sludge, but also avoids clogging risks caused by too small spacing. The surface adopts professional oleophilic and hydrophobic modification treatment, which significantly improves the coalescence efficiency of fine oil droplets.

2. Ultra-High Separation Efficiency

Compared with traditional grease traps with long retention time, optimized CPI modules shorten the oil droplet floating distance by 80%, and can complete the separation of free oil droplets above 30μm within 30 minutes. The free oil removal rate is ≥95%, the dispersed oil removal rate is ≥70%, and the minimum effluent oil content can reach 10ppm, which far exceeds the industry average level.

3. Modular and Easy to Install and Maintain

The drawer-type modular design supports factory prefabrication and on-site integral hoisting, and single components can be disassembled independently for maintenance and replacement. It can be flexibly installed in various tanks and pools, suitable for new project supporting installation and old equipment efficiency transformation, with low later operation and maintenance costs.

4. Excellent Environmental Adaptability

Optional materials such as stainless steel, polypropylene and reinforced composite materials are available, with strong corrosion resistance. It can adapt to harsh water quality environments such as coal tar wastewater, phenolic wastewater, sulfur-containing wastewater and high-salinity wastewater, and has stable performance in high-temperature and high-impurity working conditions.

Wide Industrial Application Scenarios

1. Petroleum and Petrochemical Industry

It is used for pretreatment of oilfield produced water, refinery electric desalting wastewater, tank farm oily wastewater and drilling wastewater, effectively removing floating oil and suspended solids, reducing the load of downstream DAF and filtration equipment.

2. Coal Chemical Industry

Specially adapted to coal gasification wastewater and conversion wastewater with high oil and high impurity content, it solves the problem of difficult separation of coal tar and fine oil droplets, and guarantees the stable operation of subsequent biochemical treatment system.

3. New Energy and Marine Engineering

It is suitable for pretreatment of lithium precipitation mother liquor, offshore platform produced water, dock oily wastewater and ship bilge water, providing high-quality water inlet conditions for advanced treatment processes.

Industrial Engineering Value

As the front-end pretreatment core equipment of the oily wastewater treatment system, Brator CPI corrugated plate assembly undertakes the main oil removal work. It removes most of floating oil and dispersed oil at ultra-low operating cost, effectively avoiding the failure of downstream fine separation equipment caused by excessive oil content. The pure physical treatment mode reduces chemical investment and secondary pollution, helps enterprises reduce operating costs, and builds an economical, efficient and stable oily wastewater treatment process chain.

Conclusion

CPI corrugated plate interceptor is a mature, stable and high-cost-performance core component in the field of oil-water separation. With its modular design, high separation efficiency, wide adaptability and zero chemical consumption advantages, it has become an essential supporting equipment for industrial oily wastewater pretreatment. Brator's optimized corrugated plate assembly further improves the separation accuracy and anti-clogging performance, providing reliable core technical support for the green and efficient operation of industrial wastewater treatment systems.