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centrisys decanter centrifuge
,solid liquid centrifuge
The Decanter Centrifuge for Paper Coating Slurry Recovery is designed for continuous coating-pigment recovery, slurry thickening, wash-water clarification, and filter-press feed preparation.
It is suitable for paper coating colors containing kaolin, calcium carbonate, titanium dioxide, latex binders, starch, dispersants, and other coating additives.
- Off-spec paper coating slurry recovery
- Coating kitchen wash-water treatment
- Coater cleaning wastewater clarification
- Kaolin coating slurry thickening
- GCC and PCC slurry recovery
- Titanium dioxide pigment recovery
- Coating sludge volume reduction
- Filter press feed preparation
- Paper mill process-water clarification
- Coating wastewater pretreatment
Fine Pigment Particles
Kaolin, calcium carbonate, and titanium dioxide particles may remain suspended.
Higher centrifugal force and optional coagulation or flocculation can improve solids recovery.
Latex and Binder Deposits
Latex, starch, and synthetic binders may create sticky sludge or deposits inside the machine.
Stable feeding, suitable differential speed, and regular flushing help maintain continuous discharge.
High Slurry Viscosity
Concentrated coating color may have high viscosity and poor flowability.
An agitated buffer tank and controlled feed pump help stabilize the feed condition.
Grade and Color Contamination
Different coating formulations should be collected separately when recovered solids will be returned to production.
Dedicated pipelines and flushing systems help reduce cross-contamination.
Fiber and Coarse Impurities
Paper fibers, dried coating lumps, and foreign particles may block the feed system.
Screening is recommended before the slurry enters the centrifuge.
Paper Coating Slurry Recovery Solution
Peony provides continuous separation solutions for coating-pigment recovery, sludge thickening, water clarification, and downstream filtration preparation.
Paper Coating / Coater Cleaning / Tank Washing
→ Screening
→ Agitated Slurry Tank
→ Optional pH Adjustment / Flocculation
→ Decanter Centrifuge
→ Thickened Coating Solids
→ Rework Evaluation / Filter Press / Dryer / Disposal
Clarified Liquid
→ Water Tank
→ Polishing Filtration / Biological Treatment / Membrane Treatment
→ Reuse or Discharge
Peony Can Provide
- Coating slurry testing and centrifuge selection
- Screening and slurry buffer tank
- Controlled feed pump
- Optional chemical dosing system
- Adjustable bowl and differential speed
- Pond-depth and torque control
- Anti-stick internal configuration
- Automatic flushing or CIP
- Clarified-liquid collection system
- PLC and VFD automatic control
- Filter press or wastewater-treatment integration
How the Decanter Centrifuge Works
1. Coating Slurry Feeding
Screened paper coating slurry enters the rotating bowl through a controlled feed pipe.
An agitated tank maintains a stable concentration and prevents coating solids from settling.
2. Centrifugal Sedimentation
High-speed rotation separates coating pigments, fiber fines, and binder solids from the liquid phase.
The denser particles move outward and form a solids layer against the bowl wall.
3. Continuous Solids Conveying
The screw conveyor rotates at a controlled differential speed.
It continuously transports settled coating solids toward the conical discharge end.
4. Clarified Liquid Discharge
The separated liquid leaves through the liquid outlet.
It can be sent to polishing filtration, biological treatment, membrane treatment, or water-recovery systems.
5. Thickened Coating Solids Discharge
Concentrated coating solids are discharged continuously.
The recovered material can be evaluated for rework or transferred to filtration, drying, recycling, or disposal.
| 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
Continuous Pigment Recovery
Recovers suspended kaolin, calcium carbonate, titanium dioxide, and other coating solids.
Stable Slurry Thickening
Provides a more consistent solids concentration for rework, filtration, or sludge handling.
Reduced Wastewater Load
Removes coating solids before biological, flotation, or membrane treatment.
Anti-Stick and Cleaning Design
Flushing and CIP connections help reduce latex, starch, and binder deposits.
Lower Product Loss
Separate collection and controlled processing can support recovery of compatible off-spec coating slurry.
Please provide:
- Coating pigment and binder type
- Particle size and solids concentration
- Slurry viscosity, pH, and flow rate
- Required recovery and liquid clarity
- Reuse or downstream treatment plan
Can recovered coating solids be returned to production?
Possibly. The formulation, color, particle size, contamination level, and coating-performance requirements must first be checked.
Can the centrifuge recover kaolin and calcium carbonate?
Yes. Recovery depends on particle size, slurry concentration, viscosity, and dispersion stability.
How are latex and starch deposits controlled?
Stable feeding, suitable differential speed, automatic flushing, and regular CIP help reduce sticky buildup.
Is screening required before centrifugation?
Yes. Fibers, dried coating lumps, and foreign particles should be removed to protect the feed system and discharge ports.
Can clarified liquid be reused in the paper mill?
It may be reused after checking suspended solids, COD, dissolved chemicals, color, and the water-quality requirements of the intended process.
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