Three Phase Decanter Centrifuge for Recoverable Oil Separation

Three-Phase Decanter Centrifuge for Recoverable Oil Separation is designed to separate and recover valuable oil phase from oil-water-solid mixed materials.

It is suitable when the feed contains recoverable oil, water, and solid residue at the same time. The machine separates the material into three phases:

• Recovered oil phase
• Separated water phase
• Discharged solid residue

The main purpose is to help customers recover usable oil, reduce oil loss in sludge or residue, separate water phase, and discharge solids continuously.

This machine is suitable for oil-containing materials where a recoverable oil phase exists.

Typical feed conditions include:

• Oil-water-solid mixture with visible oil phase
• Oily residue containing recoverable oil
• Process sludge with free oil
• Tank or process residue with separable oil phase
• Oil-containing industrial slurry
• Grease-containing process residue
• Oily mixtures after heating or demulsification
• Oil-rich sludge where oil recovery is economically meaningful

In many oil-water-solid mixtures, part of the oil remains trapped in sludge, residue, water phase, or solid cake.

If this oil is not recovered, the plant may face:

• Higher oil loss
• Higher sludge disposal volume
• Increased downstream treatment load
• More difficult water phase treatment
• Higher operating cost
• Lower resource recovery value
• More unstable oil-water separation performance

A three-phase decanter centrifuge helps separate oil, water, and solids in one continuous process.

For suitable materials, the recovered oil phase can be collected for reuse, recovery, further refining, or downstream treatment according to the process requirement.

Before choosing a three-phase decanter centrifuge, the oil condition should be evaluated.

A three-phase decanter is most effective when the oil phase is separable and the feed condition is stable enough for continuous phase separation.

The oil-water-solid mixture enters the rotating bowl through the feed pipe.

Under centrifugal force, the phases separate according to density difference.

• Heavy solids move outward and form a sediment layer on the bowl wall.
• Water forms the heavier liquid layer.
• Oil stays closer to the center as the lighter liquid phase.

The screw conveyor rotates at a controlled differential speed and continuously pushes the separated solids toward the discharge end.

Recoverable oil separation often depends on proper pretreatment.

Heating can reduce oil viscosity and make the oil phase easier to separate.

It is useful when the feed contains heavy oil, grease, waxy oil, tar-like components, or high-viscosity oil phase.

If oil and water are emulsified, demulsifier dosing may be required.

Without demulsification, the recovered oil may contain more water, and the water phase may contain more oil.

A homogenization tank helps stabilize feed concentration, oil-water ratio, and solids distribution.

This is important when the feed condition changes frequently.

Large particles, stones, rags, or hard foreign objects should be removed before feeding.

This helps protect the centrifuge and reduce blockage risk.

The machine separates the light oil phase from oil-water-solid mixtures and helps reduce oil loss in residue.

It separates oil, water, and solids continuously, reducing the need for multiple primary separation units.

The screw conveyor continuously removes separated solids, making it suitable for feed materials with moderate or high solids content.

Heating, demulsification, and feed conditioning can be integrated to improve oil recovery when the oil phase is viscous or partly emulsified.

By separating oil before residue discharge, the system can help reduce oil content in discharged sludge or solids.

The centrifuge can be supplied as a standalone machine or integrated with feed tanks, heating units, dosing systems, oil tanks, water tanks, and PLC control.

It is useful in projects where oil recovery has economic value, not only in waste reduction applications.

With suitable pretreatment, stable feeding, and correct interface control, this three-phase decanter centrifuge can typically help achieve:

• 50–90% recoverable oil recovery
• 70–95% solid capture rate
• Reduced oil loss in water phase or solid residue
• Separate collection of recovered oil phase
• Separate discharge of water phase
• Continuous removal of solid residue
• Lower downstream oil-water treatment load
• Reduced residue volume before further treatment
• More stable recovery of oil from mixed feed streams

Actual performance depends on oil content, water content, solids content, viscosity, temperature, particle size, emulsification level, pretreatment effect, interface control, and operating parameters.

For strongly emulsified oil-water mixtures, pretreatment is usually required before centrifugation.

To recommend a suitable three-phase decanter centrifuge for recoverable oil separation, please provide:

• Feed material name
• Process background
• Capacity requirement, in m³/h or tons/day
• Oil content
• Water content
• Solids content
• Whether the oil is free oil or emulsified oil
• Oil viscosity
• Feed temperature
• Particle size and solid characteristics
• Density difference between oil and water, if available
• Current pretreatment method
• Whether heating is allowed
• Whether demulsifier dosing is allowed
• Target oil recovery rate
• Target water content in recovered oil
• Target oil content in discharged water phase
• Target oil content in discharged solids
• Corrosion condition
• Abrasion condition
• Volatile or flammable components, if any
• Required operating hours per day
• Site voltage and control preference
• Need for skid-mounted system or not

It is a tricanter centrifuge used to separate recoverable oil, water, and solids from oil-water-solid mixed materials.

Heating is useful when the oil phase is viscous, heavy, waxy, or difficult to separate at normal temperature. It helps reduce viscosity and improve oil-water separation.

It depends on the emulsification level. If the oil and water are strongly emulsified, heating, demulsifier dosing, or other pretreatment may be required.

Oil recovery depends on oil content, emulsification level, viscosity, temperature, solids load, particle size, pretreatment, interface control, and machine settings.

It depends on oil quality and process requirement. In many cases, recovered oil may need further settling, polishing, filtration, refining, or treatment.

Yes. It can be configured for continuous industrial operation. Stable feeding, suitable material selection, proper maintenance, and correct operating parameters are important for long-hour operation.

If you have local customer channels or project resources involving recoverable oil separation, oil-water-solid separation, oily residue recovery, process oil recovery, or three-phase centrifuge projects, Peony welcomes cooperation.

Peony can support local agents, distributors, and project partners with technical model selection, oil recovery process recommendation, pretreatment configuration, skid-mounted system integration, equipment manufacturing, installation guidance, commissioning support, spare parts, and after-sales service.

Please send us your target market, customer type, project background, and cooperation proposal. Our team will evaluate the opportunity and provide technical and commercial support for suitable recoverable oil separation projects.