Low Floc Shearing Protection and Anti-Abrasion Two Phase Decanter
Centrifuge for Pulp and Deinking Sludge
Description
Pulp, Paper & Deinking Sludge Decanter is designed for continuous
solid-liquid separation of paper mill sludge, deinking sludge,
fiber-rich wastewater, and white water solids.
For most paper mill sludge and fiber recovery applications, the
recommended configuration is a two-phase decanter centrifuge
because the main target is to separate fibers, fillers, and sludge
solids from water.
Best-Fit Applications
- Primary sludge dewatering
- Secondary sludge dewatering
- Deinking sludge treatment
- Pulp fiber recovery
- White water solid recovery
- Paper mill wastewater sludge concentration
Typical materials include pulp fibers, fillers, fine suspended solids, deinking sludge,
biological sludge, and paper mill wastewater.
Why Two-Phase is Recommended
- The feed mainly contains solid fibers / fillers + water.
- It supports both sludge dewatering and useful fiber recovery.
- It reduces suspended solids in white water and lowers downstream
treatment load.
When Another Configuration May Be Considered
- If the wastewater contains oil, grease, or floating scum.
- If the feed contains large impurities without screening.
- If the target is ultra-clear water, downstream filtration may still
be required.
How the Decanter Centrifuge Works in This Application
- Paper mill sludge or fiber-rich white water enters the rotating
bowl through the feed pipe.
- Under centrifugal force, heavier fibers, fillers, and sludge solids
move outward.
- The screw conveyor continuously pushes the separated solids toward
the discharge end.
- The clarified liquid phase is discharged through the liquid outlet.
- The separated solids can be used for fiber recovery, sludge
disposal, drying, or further treatment.
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 |
Typical Feed Conditions and Design Considerations
| Item | Typical Range / What to Confirm |
|---|
| Feed material | Primary sludge, secondary sludge, deinking sludge, white water
solids |
| Solids content | Usually 1–8% |
| Fiber content | Medium to high; confirm fiber length and recovery target |
| Oil content | Usually not applicable |
| Particle characteristics | Fibrous, fine, flocculated, filler-rich |
| Viscosity | Low to medium |
| Temperature | Usually 20–60°C |
| Corrosion risk | Low to medium; confirm pH and chemicals |
| Capacity requirement | Confirm by m³/h or tons/day |
| Target result | Fiber recovery, sludge dewatering, white water clarification |
Main Advantages in Paper Mill Sludge Treatment
- Continuous automatic operation
- Effective fiber and filler recovery
- Reduced sludge disposal volume
- Lower suspended solids in white water
- Supports water reuse in paper mills
- Compact footprint
- Optional wear protection
- Process design can reduce excessive floc shear
Expected Results
With proper screening, polymer dosing, and stable feeding, this
decanter centrifuge can typically achieve:
- 75–90% fiber / solids recovery rate
- 60–85% suspended solids reduction
- 18–35% cake solids content
- 65–82% final cake moisture
- 30–60% sludge volume reduction
- 20–50% lower downstream treatment load
- 16–24 hours/day continuous operation
Actual results depend on sludge type, fiber content, filler
content, polymer dosing, floc strength, and operating settings.
FAQ
Is this machine suitable for deinking sludge?
Yes. It can be used for deinking sludge dewatering, filler
separation, and paper fiber recovery.
Can it recover useful fibers?
Yes. The system can help recover pulp fibers from white water or
fiber-rich sludge, depending on fiber size and feed condition.
Is polymer dosing required?
Usually yes. Polymer dosing helps improve floc formation, solids
capture, and cake dryness.
What should be considered for paper mill sludge?
Key points include fiber recovery rate, floc shear resistance,
filler content, abrasion, feed stability, and downstream water
reuse requirements.
What information is needed for model selection?
Please provide feed material, capacity, solids content, fiber
content, filler content, target cake moisture, target SS reduction,
polymer dosing condition, and operating hours.
Send Us Your Project Data
To recommend a suitable model, please share:
- Feed material name
- Capacity requirement
- Solids content
- Fiber content
- Filler content
- Target fiber recovery rate
- Target cake moisture
- White water reuse requirement
- Polymer dosing condition
- Operating hours
- Material or wear protection requirements
Our engineering team can suggest a suitable two-phase decanter centrifuge configuration for your pulp, paper, and deinking sludge treatment project.
Contact Peony for Partnership
If you have local customer channels or project resources in paper
mill sludge treatment, deinking sludge dewatering, white water
recovery, pulp fiber recovery, or recycled paper wastewater
treatment, peony welcomes cooperation.
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 projects.
