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| Place of Origin: | China |
| Brand Name: | Longdai |
| Model Number: | LW |
| Document: | Long Dai Water Treatment Eq...ue.pdf |
| Minimum Order Quantity: | 1Set |
|---|---|
| Price: | 15000USD-25000USD |
| Packaging Details: | Wooden or customized |
| Delivery Time: | 30 working days |
| Payment Terms: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability: | 100Set Per Month |
| Features: | Continuous Operation, High Efficiency, Low Maintenance | Material: | SS304 |
|---|---|---|---|
| Machinery: | Separation Centrifuge | Collocation: | Double Motor With Double Transduce |
| Weight: | 1400 | Discharge Type: | Spiral Screw Discharge |
| Use: | Solids Control Centrifuge | Core Components: | PLC，Motor, Pressure Vessel, Bearing |
| Item: | Industrial Separator Centrifuge Machine | Description: | Solid-liquid Separation Machine |
| Highlight: | Decanter Centrifuge for solid-liquid separation,Continuous Decanter Centrifuge machine,Industrial Decanter Centrifuge with warranty |
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Decanter Centrifuge: The Continuous Solution for Solid-Liquid Separation
The decanter centrifuge is the most widely used continuous sedimentation-type centrifuge in industrial solid-liquid separation. Unlike filter-based systems, it operates without filtration media, relying instead on a high-intensity centrifugal field generated by rapid rotation to accelerate solid particle settling—enabling highly efficient two-phase separation.
It excels at processing feeds with:
As a result, it has become standard equipment across municipal wastewater, oil & gas, food & beverage, mining, metallurgy, and chemical industries worldwide.
Feed slurry enters through a stationary feed pipe into the distribution chamber of the scroll conveyor, then is evenly discharged into the rotating bowl. Both the bowl and scroll rotate in the same direction, but at slightly different speeds (differential speed).
Under centrifugal force:
The entire process—from feeding to solids discharge and liquid clarification—is fully automatic and continuous.
| Component | Description |
|---|---|
| Bowl Assembly | Cylindrical-conical design; cone angle typically 8°–15°; features longitudinal anti-slip ribs or wear-resistant liners |
| Scroll Conveyor | Rotates relative to the bowl; blade edges welded or coated with hardfacing alloys (e.g., tungsten carbide) |
| Differential Drive System | Planetary gearbox or hydraulic differential—ensures stable torque for reliable solids transport |
| Main Bearings & Base Frame | High-precision spherical roller bearings; monolithic cast base with vibration-damping mounts |
| Sealing & Protection | Mechanical seals (standard) or labyrinth seals—prevent leakage and external contamination |
| Electrical Control System | VFD drive cabinet + HMI touchscreen; supports data logging and remote communication |
| Advantage Dimension | Specific Benefits |
|---|---|
| Continuous Operation | No shutdown required for discharge—24/7 × 365 days/year operation |
| High Feed Flexibility | Handles inlet solids from 0.5% to 40% without performance loss |
| Adjustable Dewatering | Cake dryness fine-tuned in real time via differential speed and pond depth control |
| Low Consumable Costs | No filter cloths, plates, or disposable media—minimal recurring costs |
| Fully Enclosed & Eco-Friendly | Zero splashing or odor emissions—compliant with global HSE and environmental standards |
| Compact Footprint | Requires significantly less space than belt presses or plate-and-frame filters per unit capacity |
(Standard range for industrial & municipal applications; fully customizable based on feed characteristics)
| Parameter | Technical Range |
|---|---|
| Bowl Diameter | 300 / 400 / 500 / 600 / 700 / 800 / 1000 mm |
| Length-to-Diameter Ratio (L/D) | 3.5 : 1 – 5.0 : 1 |
| Max Bowl Speed | 5,000 rpm (smallest) – 1,800 rpm (largest) |
| Separation Factor (G) | 2,000 – 4,500 G |
| Differential Speed | 0.3 – 25 rpm (VFD infinitely adjustable) |
| Throughput Capacity | 1.5 – 180 m³/h (material-dependent) |
| Solids Recovery Rate | 94% – 99% (with optimized flocculation) |
| Cake Dry Solids | 20% – 45% • Municipal sludge: 28–32% • Chemical sludge: 30–40% |
| Liquid Phase SS | 200 – 3,000 mg/L (can be reduced to <100 mg/L with flocculant) |
| Main Motor Power | 5.5 – 200 kW |
| Auxiliary Motor Power | 2.2 – 75 kW |
| Noise Level | ≤85 dB(A) (with acoustic hood) |
| Vibration Severity | ≤4.5 mm/s (per ISO 10816, loaded/unloaded) |
| Operating Temperature | 0°C – 90°C (high-temp models up to 120°C) |
| Materials of Construction | |
| – Bowl | Duplex 2205 / 316L / Abrasion-resistant carbon steel |
| – Scroll | 316L + tungsten carbide coating / ceramic inserts |
| – Casing | 304 / 316L / Rubber-lined carbon steel |
| Sealing Type | Mechanical seal (standard) / Packing seal (optional) |
| Control System | PLC + industrial HMI; local/remote operation switchable |
| Communication Protocols | Modbus RTU/TCP, Profibus DP, Ethernet/IP |
| Protection Rating | Motors: IP55; Control cabinet: IP42 (IP54 outdoor option available) |
| Explosion Protection | Ex d IIB T4 / ATEX Zone 1 & 2 (optional) |
| Unit Weight | 900 – 15,500 kg |
| Installation Method | Anti-vibration elastomeric base—no anchor bolts required |
| Option | Function |
|---|---|
| Centripetal Pump | Replaces overflow weir; enables real-time adjustment of centrate clarity |
| Back Pressure Plate | Increases cake dryness by extending residence time in conical zone |
| Bearing Temperature Sensors (PT100) | With over-temperature alarm for predictive maintenance |
| Vibration Sensors | Acceleration or velocity type; compliant with ISO 10816 |
| CIP Spray System | Automated internal cleaning for sticky or adhesive materials |
| Acoustic Enclosure | Ensures noise ≤85 dB(A)—ideal for urban or indoor installations |
| Nitrogen Purging System | For explosion-proof or oxidation-sensitive applications |
| Extended Conical Section | Enhances dewatering pressure and cake compaction |
| Industry | Application | Key Requirements | Target Regions |
|---|---|---|---|
| 1. Municipal Wastewater | Thickening/dewatering of WAS, digested sludge, primary sludge | Reduce moisture from >98% to <75% for landfill/incineration/composting | Southeast Asia, India, Eastern Europe, South America |
| 2. Oil & Gas | Oily sludge reduction, drilling mud recovery, tank bottom cleaning | Achieve <1% residual oil; integrate with thermal/solvent processes | Middle East, Central Asia, West Africa, Russia |
| 3. Chemical & Pharma | Mother liquor separation, catalyst recovery, dye intermediate dewatering | Explosion-proof, corrosion-resistant, mechanical seals for solvents/acids/bases | Europe, North America, China, India |
| 4. Food & Beverage | Starch dewatering, fruit pomace separation, yeast recovery, protein extraction | Hygienic design; high-value byproduct recovery | South America (juice), SE Asia (palm oil), Europe (dairy/beer) |
| 5. Mining & Metallurgy | Tailings dewatering, coal wash water recycling, metal powder recovery | Extreme wear resistance, high-torque differential, anti-clogging design | Africa, South America, Australia, Mongolia |
| 6. Livestock & Agri-Waste | Digestate separation, manure fractionation, poultry slurry treatment | Solid for compost/bedding; liquid for reuse or biogas | Southeast Asia, Eastern Europe, large US/Canadian farms |
| 7. Textile & Dyeing | Sludge dewatering, size recovery, dye precipitation | Corrosion resistance (alkalis, salts), clog-resistant flow paths | Bangladesh, Vietnam, India, Pakistan |
Solid-liquid separation is rarely solved by simply “buying a machine.” Particle size distribution, solids concentration swings, pH, temperature, viscosity, and chemical composition—all these variables directly impact performance.
The true strength of the decanter centrifuge lies in its adaptability and tunability: by adjusting rotational speed, differential speed, pond depth, and flocculant dosage, it delivers stable, predictable results across a wide operating envelope.
We understand that international buyers care less about glossy brochures and more about one question:
“With my sludge, on my site—what will it actually deliver?”
If you’re evaluating a project in municipal, oil & gas, chemical, food, mining, or agriculture, please share the following:
We’ll provide a preliminary technical proposal and expected performance within one business day.
The decanter centrifuge isn’t a universal solution—but in the vast majority of solid-liquid separation challenges, it’s the closest thing to one.
Contact Person: Mr. Vance
Tel: +8615301537517
Fax: 86-0510-87837599
