The Three Phase Decanter Centrifuge for Refinery Slop Oil Recovery is designed for continuous separation of recovered oil, water, and concentrated solids from refinery slop streams.

It is suitable for slop oil collected from tank drains, desalter operations, equipment cleaning, process upsets, oily wastewater systems, and off-spec hydrocarbon recovery.

• Refinery slop oil recovery
• Desalter sludge treatment
• Oily drain and sump sludge separation
• API separator sludge treatment
• Off-spec oil recovery
• Tank drain sludge processing
• Refinery cleaning waste treatment
• Oily wastewater pretreatment
• Hydrocarbon recovery before DAF
• Hazardous sludge volume reduction

Stable Oil-Water Emulsions

Surfactants, fine solids, asphaltenes, and process chemicals may stabilize the emulsion.

Heating, demulsifier dosing, and controlled mixing can improve separation.

Variable Feed Composition

Oil, water, and solids content may change between batches or during one recovery operation.

Adjustable bowl speed, differential speed, feed rate, and phase interface help maintain stable performance.

High Viscosity

Heavy hydrocarbons and wax can reduce fluidity.

Feed heating or controlled dilution may be required before centrifugation.

Abrasive and Sticky Solids

Rust, sand, coke, catalyst fines, and heavy sludge can cause wear or unstable solids discharge.

Wear-resistant scroll protection and high-torque conveying can be provided.

Salts and Process Chemicals

Slop oil may contain chlorides, treatment chemicals, acids, or alkaline residues.

Wetted materials and seals should be selected according to the actual liquid composition.

Peony provides continuous three-phase separation solutions for hydrocarbon recovery, water separation, sludge concentration, and downstream treatment preparation.

Refinery Slop Oil
→ Coarse Screening
→ Heated Agitated Tank
→ Optional Demulsifier Dosing
→ Three Phase Decanter Centrifuge
→ Recovered Oil + Separated Water + Concentrated Solids

Recovered Oil
→ Oil Tank
→ Reprocessing / Blending / Further Purification

Separated Water
→ API Separator / DAF / Biological Treatment

Concentrated Solids
→ Thermal Treatment / Further Dewatering / Controlled Disposal

Peony Can Provide

• Slop oil testing and centrifuge selection
• Screening and heated feed tank
• Controlled feed pump
• Demulsifier dosing system
• Adjustable bowl and differential speed
• Adjustable oil-water interface
• Wear-resistant internal components
• Gas-tight and explosion-proof design
• Nitrogen protection and vapor connection
• PLC and VFD automatic control
• Oil, water, and solids collection system

Simultaneous Three-Phase Separation

Recovered oil, separated water, and concentrated solids are produced continuously.

Higher Hydrocarbon Recovery

Conditioned separation reduces valuable oil loss in refinery sludge and wastewater.

Reduced Sludge Volume

Concentrated solids require less storage, transport, and final treatment.

Flexible Feed Handling

Operating parameters can be adjusted for changing oil, water, and solids ratios.

Safe Closed Operation

Gas-tight, explosion-proof, and nitrogen-protected configurations are available.

Please provide:

• Oil, water, and solids percentages
• Feed temperature and viscosity
• Particle size and abrasive content
• Required processing capacity
• Oil recovery and water-quality targets
• Hazardous-area and downstream requirements

Peony welcomes distributor and agent cooperation with refineries, oil terminals, slop oil processors, hazardous-waste companies, tank-cleaning contractors, and oily-wastewater treatment partners.

We support partners with slop oil testing, three-phase decanter selection, heating and demulsifier design, wear protection, gas-tight configuration, commissioning, spare parts, and after-sales service.

Send us your slop oil data, including oil-water-solids ratio, viscosity, temperature, required capacity, recovery target, and safety requirements. Our engineering team will recommend a suitable three-phase decanter centrifuge solution.