Two-Phase Separation Matched to Real Feed Conditions
A 2-phase decanter is the right choice when the process target is to remove suspended solids, discharge a drier cake, or recover clarified liquid for reuse. ZK engineers select bowl geometry, beach angle, differential speed range, pond depth, wetted materials and wear protection according to feed solids content, abrasiveness, corrosion risk and the required separation result.
Typical Range
Why It Fits Solid-Liquid Separation
Continuous feeding and discharge help plants replace batch settling or filter press steps where stable throughput and reduced operator attendance are required.
Adjustable differential speed and pool depth allow operators to balance cake dryness, centrate clarity and solids recovery when feed concentration changes.
Wear protection such as tungsten carbide tiles, ceramic sleeves and hardened discharge ports extends service life in abrasive sludge and mineral slurry duties.
PLC control, torque monitoring, vibration protection and HMI parameter settings support long-term 24/7 operation for production and maintenance teams.
How a 2-Phase Decanter Works
Feed Distribution
The feed slurry enters through a stationary feed tube and is accelerated inside the rotating bowl. A stable feed zone reduces turbulence before separation begins.
Solid-Liquid Separation
Centrifugal force pushes heavier solids to the bowl wall while the clarified liquid remains closer to the center, forming a separate liquid layer.
Solids Conveying
The scroll conveyor rotates at a controlled differential speed and moves the settled solids toward the conical beach for further drainage.
Two Separate Discharges
Dewatered solids discharge from the solids ports, while clarified liquid exits through adjustable overflow weirs for reuse, discharge or downstream treatment.
Key Features of ZK 2-Phase Decanters
Stable Separation Under Changing Loads
Variable speed control helps the centrifuge adapt to changes in feed flow, solids concentration and viscosity without frequent mechanical adjustment.
Lower Disposal and Handling Cost
Effective dewatering reduces sludge or slurry volume, helping reduce transport, storage and disposal costs in continuous production plants.
Process-Specific Materials
Duplex stainless steel, 316L stainless steel, corrosion-resistant coatings and food-contact options can be selected according to process media.
Easy Operation and Maintenance
HMI control, fault alarms, lubrication support and accessible wear parts help operators keep the centrifuge running with predictable service intervals.
Where 2-Phase Decanters Create Value
Wastewater and Sludge Treatment
For municipal sludge, industrial wastewater and paper or food processing effluent, the decanter reduces water content and produces clearer centrate for return or further treatment.
View Sludge Centrifuge
Food and Fermentation Processing
Used for DDGS, starch, juice, food additives and fermentation broth, the centrifuge separates fibrous or suspended solids from valuable liquid streams.
View Food Decanter
Mining and Construction Slurry
Heavy-duty wear protection supports tunneling mud, sand washing water, tailings and mineral slurry dewatering where abrasive solids are common.
Explore Slurry Applications2-Phase Decanter Centrifuge Specifications
Standard model selection depends on feed rate, solids content, particle size, required cake dryness and centrate quality. ZK can also customize bowl diameter, length-diameter ratio, drive configuration and wetted materials.
| Model | Speed (rpm) | Max G Force | Main Motor (kW) | Back Motor (kW) | Capacity (m3/h) | Weight (kg) |
|---|---|---|---|---|---|---|
| LW250x1025 | 4500 | 2835 | 11 | 4 | 2~5 | 1400 |
| LW350x1435 | 3500 | 2435 | 15~22 | 5.5 | 4~15 | 2760 |
| LW450x1845 | 3200 | 2580 | 30~37 | 7.5~11 | 10~40 | 4000 |
| LW520x2150 | 3000 | 2620 | 55~75 | 11~15 | 15~70 | 6300 |
| LW650x2600 | 2600 | 2460 | 90~110 | 22~30 | 30~90 | 11000 |
| LW750x2800 | 2200 | 2033 | 110~160 | 30~45 | 40~100 | 16000 |
Representative 2-Phase Decanter Applications
ZK supports model selection and commissioning based on material samples, operating targets and site conditions. The same 2-phase platform can be configured for higher cake dryness, clearer centrate, abrasive slurry service or sanitary food processing requirements.
DDGS and Alcohol Lees Dewatering
A ZK LW430 decanter is used to remove moisture from alcohol lees, making by-products easier to dry, store and transport. Continuous operation reduces manual handling while improving process stability for the production line.
Get Your Solution
Shield Mud and Construction Slurry Treatment
For tunneling and construction slurry, ZK decanters separate fine solids from process water, helping reduce mud volume, recover reusable water and keep site discharge under control.
Explore Application2-Phase Decanter FAQs
These quick answers help determine whether a 2-phase decanter is the right separation equipment for your process.
It separates a feed mixture into one solid phase and one liquid phase. Typical goals include sludge dewatering, liquid clarification, solids recovery and slurry volume reduction.
Choose a 2-phase decanter when the target is solid-liquid separation. Choose a 3-phase decanter when the process must separate two immiscible liquids and solids, such as oil, water and solid residue.
Yes. For abrasive feeds, ZK can configure tungsten carbide tiles, ceramic liners, hardened discharge ports and suitable stainless steel grades to extend service life.
