Oil–water–solids separation
Continuous treatment of mixtures containing solids and two immiscible liquids with a sufficient density difference.
Three-phase horizontal decanter
Three-Phase Decanter Centrifuge
Continuous solid–liquid–liquid separation of one solid phase and two immiscible liquid phases, with scroll solids discharge and independent liquid outlets. Designed and manufactured for oil–water–solids separation and chemical and extraction processes. Review the working principle, performance features and available configuration details below when specifying your industrial project.
- Continuous separation of one solid phase and two immiscible liquid phases.
- Light-phase overflow, pressurized heavy-phase discharge and automatic scroll solids removal.
- Dual-motor differential control with optional common-DC-bus energy recovery.
- Process
- Solid–liquid–liquid sedimentation
- Operation
- Continuous
- Discharge
- Scroll solids discharge; separate liquid outlets
- Model data
- Configuration confirmation required
Product Essentials
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Three-Phase Decanter Centrifuge Technical Data
Technical specifications
Reference performance values for the four three-phase decanter centrifuge configurations. Confirm material conditions and final configuration before selection.
| Model | Bowl diameter (mm) | L/D | Bowl speed (r/min) | Separation factor | Main motor power (kW) | Machine weight (kg) | Overall dimensions (mm) |
|---|---|---|---|---|---|---|---|
| Model 1 | 350 | 4.17 | 4000 | 3130 | 22–30 | 2250 | 3450 × 1010 × 1030 |
| Model 2 | 420 | 4 | 3600 | 3050 | 30–37 | 4000 | 3500 × 1450 × 1300 |
| Model 3 | 530 | 4 | 3200 | 3040 | 45–55 | 5500 | 4100 × 1600 × 1450 |
| Model 4 | 720 | 4 | 2000 | 1610 | 110 | 11000 | 5300 × 2050 × 1750 |
Source reference values. Final three-phase separation arrangement, dimensions, materials and performance are confirmed during engineering.
Applications
Three-Phase Decanter Centrifuge: industrial applications
Applications include oil–water–solids separation and chemical and extraction processes. Confirm material properties and process conditions before selecting the equipment configuration.
Chemical and extraction processes
Extraction-liquor separation and other three-phase chemical process streams.
Environmental processing
Oily sludge and related wastewater streams requiring simultaneous solids removal and liquid-phase separation.
Hygiene-sensitive production
Pharmaceutical and food duties that benefit from separate phase outlets and reduced remixing.
Industrial sectors
Chemical, pharmaceutical, food, environmental, mining and energy applications.
Working Principle
From feed preparation to finished product.
The process route is selected around the material and product targets.
Continuous feed
Feed enters through the feed pipe and is accelerated and distributed into the rotating bowl.
Solids sedimentation
The highest-density solids settle rapidly against the bowl wall and form a stable sediment layer.
Liquid-phase stratification
The two liquids form separate heavy- and light-phase layers, creating a solids–heavy liquid–light liquid arrangement from the bowl wall toward the axis.
Differential scroll discharge
The scroll rotates at a controlled differential speed and continuously conveys settled solids to the conical end for discharge.
Independent liquid discharge
The light phase overflows at the large-diameter end, while the heavy phase is discharged under pressure by a centripetal pump through a separate outlet.
Performance Highlights
Process performance shaped around the product.
Final performance remains dependent on feed properties and engineering confirmation.
Continuous three-phase separation
One solid and two liquid phases are separated and discharged continuously without routine shutdown for solids removal.
Large L/D bowl
The operating range is selected for the material and confirmed for the quoted configuration.
High product recovery
The operating range is selected for the material and confirmed for the quoted configuration.
Flexible differential control
Dual-motor, dual-VFD control enables online adjustment of solids residence time and scroll discharge rate.
Pressurized heavy-phase discharge
The centripetal pump provides useful discharge pressure while independent liquid paths support stable phase separation.
Energy-efficient drive option
A common-DC-bus regenerative system can recover usable energy and reduce overall electrical demand.
Reduced scroll load
Optimized conveying geometry reduces friction, torque and adhesion of sticky solids.
Long-life wear protection
Replaceable wear components protect the bowl, scroll flights, feed zone and solids outlets in abrasive service.
System Configuration
Standard process path with project-specific options.
Core equipment and auxiliary systems are selected around the process duty.
Three-phase bowl
The bowl establishes separate solids, heavy-liquid and light-liquid zones for simultaneous continuous separation.
Centripetal-pump heavy-phase outlet
The centripetal pump discharges the heavy liquid under pressure and may reduce or eliminate a downstream transfer pump, depending on system pressure requirements.
Separate discharge chambers
Liquid discharge zones and the solids outlet are isolated to reduce phase remixing, droplet recontact and cross-contamination risk.
Dual-motor, dual-VFD drive
Separate bowl and scroll drives provide responsive differential-speed control as feed and solids-loading conditions change.
Common DC bus
An optional common-DC-bus regenerative drive recovers part of the energy generated during differential or braking operation.
Optimized scroll geometry
The flow path reduces feed impact, material buildup, blockage, friction and conveying torque while supporting low solids carryover.
Centrifugally cast rotating parts
Critical bowl and scroll-shaft components use centrifugal casting for material integrity, strength and reliable high-speed operation.
Reinforced scroll flights
Depending on abrasiveness, scroll flights can use hardfaced carbide, embedded carbide blocks or wear-resistant ceramic tiles.
Replaceable wear protection
Axial wear ribs, protected feed and solids-discharge zones, and replaceable outlet liners extend service life and simplify maintenance.
High-strength self-cooling bearing housing
A rigid, self-cooling bearing-housing design supports heat dissipation and stable continuous operation.
Selection Support
What we need to confirm the final design.
Share the following process information for an efficient preliminary review.
Material name and feed formRequired capacity or batch sizeInitial and final moistureParticle or product requirementsHeat and chemical sensitivityBulk density, viscosity or flowabilityAvailable utilities and heat sourceContact material and site conditions
