Three Phase Decanter Centrifuge for Lubricant Oil Sludge Treatment
Description
The Three Phase Decanter Centrifuge for Lubricant Oil Sludge Treatment continuously separates recoverable oil, water, and concentrated solids from used lubricant sludge.
It is suitable for waste engine oil, lubricant storage sludge, oil-recycling feedstock, blending-tank residues, and oily maintenance waste.
Typical Applications
- Used lubricant oil recycling
- Waste engine oil sludge treatment
- Lubricant storage-tank sludge
- Oil blending-tank residues
- Marine lubricant sludge
- Metalworking lubricant waste
- Oily maintenance sludge
- Oil-recycling pretreatment
- Water and sediment removal
- Hazardous sludge reduction
Lubricant Oil Sludge Challenges
High Viscosity
Aged lubricant oil can be difficult to pump and separate.
Controlled heating reduces viscosity and improves three-phase separation.
Stable Oil-Water Emulsion
Detergents, dispersants, oxidation products, and fine solids may stabilize the emulsion.
Demulsifier dosing and suitable mixing time may be required.
Fine Metal and Carbon Solids
Used lubricant sludge may contain iron, aluminium, soot, carbon deposits, rust, and abrasive particles.
Wear-resistant feed, scroll, and solids-discharge components are recommended.
Degraded Oil Additives
Lubricant additives and oxidation products can affect density, viscosity, and interface stability.
Sludge testing is recommended before equipment selection.
Variable Feed Composition
Oil, water, and solids ratios may change between tanks or waste-oil sources.
Adjustable bowl speed, differential speed, and phase interface help maintain stable operation.
Lubricant Oil Sludge Treatment Solution
Peony provides three-phase solutions for oil recovery, water separation, and sludge reduction.
Used Lubricant Oil Sludge
→ Screening
→ Heated Feed Tank
→ Optional Demulsifier
→ Three Phase Decanter
→ Oil + Water + Solids
Recovered Oil → Filtration / Re-refining
Separated Water → Further Treatment
Solids → Dewatering / Disposal
Peony Can Provide
- Sludge testing and centrifuge selection
- Heated tank and feed pump
- Optional demulsifier dosing
- Adjustable phase interface
- Wear-resistant components
- Gas-tight or explosion-proof design
- PLC and dual-VFD control
How the Decanter Centrifuge Works
1. Conditioned Sludge Feeding
Screened and heated lubricant sludge enters the rotating bowl through a controlled feed pipe.
Agitation maintains a uniform feed and prevents solids settling.
2. Solids Sedimentation
Centrifugal force moves metal fines, carbon residues, rust, and dense impurities toward the bowl wall.
The solids form a concentrated outer layer.
3. Oil-Water Separation
The lighter oil phase remains closer to the bowl center.
The heavier water phase forms a separate outer liquid layer.
4. Continuous Solids Conveying
The screw conveyor transports settled solids toward the conical discharge end.
Concentrated sludge solids discharge continuously.
5. Three-Phase Discharge
Recovered oil and separated water leave through independent outlets.
The solids discharge continuously for further treatment or disposal.
Technical Parameter
| Model |
Diameter (mm) |
Length (mm) |
Length-to-diameter rate |
G force |
Max solid discharge (m³/h) |
Weight (kg) |
Dimension (L*W*H) (mm) |
| PDC-10 |
250 |
1000 |
4 |
4080 |
0.4 |
1000 |
2410*800*1080 |
| PDC-12 |
4200 |
1350 |
4 |
3500 |
0.6 |
1200 |
2610*800*1080 |
| PDC-12 |
4200 |
1350 |
4.5 |
3180 |
1.2 |
1800 |
3495*840*1180 |
| PDC-18 |
4000 |
1600 |
4.5 |
3180 |
1.2 |
3200 |
3497*1020*1385 |
| PDC-18 |
450 |
2150 |
4 |
2500 |
2 |
3800 |
4447*1080*1385 |
| PDC-20 |
400 |
2250 |
4.5 |
2500 |
3.5 |
4000 |
4580*1140*1470 |
| PDC-21 |
530 |
2280 |
4.3 |
2500 |
5 |
5000 |
4924*1170*1540 |
| PDC-26 |
655 |
2800 |
4.3 |
2270 |
8 |
7000 |
4300*1900*1350 |
Main Advantages
Recoverable Oil Separation
Recovers usable hydrocarbon content from lubricant sludge.
Continuous Water Removal
Separates free water from waste lubricant oil before further purification.
Reduced Sludge Volume
Concentrated solids require less storage, transportation, and disposal capacity.
Abrasive-Solids Handling
Wear protection supports sludge containing metal particles, rust, and carbon residues.
Flexible Automatic Control
Operating parameters can be adjusted for different oil viscosities and phase ratios.
What Data Is Needed for Selection?
Please provide:
- Oil, water, and solids percentages
- Feed temperature and viscosity
- Particle size and solids type
- Required processing capacity
- Oil recovery and water targets
- Downstream purification process
FAQ
How should highly viscous lubricant sludge be prepared?
Heating and agitation are usually used to reduce viscosity and stabilize feeding before separation.
Can the centrifuge remove soot and metal wear particles?
Yes. It continuously separates carbon residue, rust, metal fines, and other dense suspended solids.
Can it separate emulsified water from used oil?
Free water is easier to remove. Stable emulsions may require heating, demulsifier dosing, or chemical conditioning.
Can recovered oil go directly to re-refining?
Usually after testing. Additional filtration, vacuum dehydration, or purification may be required.
How are changing oil-water-solids ratios controlled?
An equalization tank, adjustable phase interface, bowl speed, and differential speed help maintain stable separation.
Contact Peony for Partnership
Peony welcomes cooperation with lubricant recyclers, waste-oil processors, refineries, marine-service companies, maintenance contractors, and hazardous-waste treatment companies.
Send us your sludge composition, viscosity, temperature, required capacity, recovery target, and downstream purification process. Our engineering team will recommend a suitable three-phase decanter centrifuge solution.
