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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: | sludge treatment decanter centrifuge,efficient decanter centrifuge for cost savings,environmentally compliant decanter centrifuge |
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A decanter centrifuge—short for horizontal spiral discharge sedimentation centrifuge—is a solid-liquid separation device that operates on the principle of centrifugal sedimentation.
It consists of:
In environmental applications, it is primarily used to thicken and dewater waste sludge. It can transform liquid sludge with >99% water content into a dewatered cake with <80% moisture—reducing sludge volume by over 90% (10x+ reduction).
| Step | Process Description |
|---|---|
| 1. Feed & Acceleration | Sludge enters via the feed pipe into an acceleration chamber inside the scroll, then is evenly distributed into the rotating bowl. |
| 2. High-Speed Sedimentation | Under intense centrifugal force (up to 4,500× gravity), denser solids rapidly settle onto the bowl wall, forming a solid cake layer; lighter liquid forms an inner ring. |
| 3. Differential Discharge | Due to a small speed difference (typically 1–30 rpm) between the bowl and scroll, the spiral continuously conveys settled solids toward the conical end and discharges them through sludge outlets. |
| 4. Liquid Overflow | Clarified liquid exits continuously through overflow weirs or a centripetal pump (for closed systems), achieving complete solid-liquid separation. |
When engaging overseas clients, emphasize these value propositions:
While initial investment may exceed traditional filter presses, the total cost of ownership (TCO) is significantly lower.
| Cost Factor | Benefit |
|---|---|
| Chemical Consumption | Modern high L/D ratio models reduce polymer (PAM) usage by 5–25% vs. belt presses or older centrifuges. |
| Energy Efficiency | VFD control + regenerative braking systems (feeding braking energy back to the grid) cut power consumption by >16% per unit. |
| Disposal & Transport | Every 1% increase in cake dryness reduces sludge weight and volume—directly lowering landfill, incineration, or transport costs. |
Proven performance across diverse global feedstocks:
Operates stably under fluctuating feed conditions—ideal for real-world industrial environments.
| Parameter | Standard Range | Notes |
|---|---|---|
| Bowl Diameter | 200 mm – 800 mm | Larger diameter = higher capacity |
| Length-to-Diameter Ratio (L/D) | 3:1 – 5:1 | L/D > 4 extends residence time → drier cake & clearer centrate |
| Cone Angle | 10° – 30° | Smaller angle = stronger conveying force (ideal for compressible sludge) |
| Max Rotational Speed | 2,000 – 4,500 rpm | Higher speed = greater G-force |
| Parameter | Standard Range | Explanation |
|---|---|---|
| Separation Factor (G) | 1,000 G – 4,500 G | ( G = frac{text{RPM}^2 times r}{895} ); higher G = better separation |
| Capacity | 0.5 – 250 m³/h | Depends on feed solids %, viscosity, and particle size |
| Feed Solids Concentration | 0.5% – 40% DS | Handles dilute to medium-concentration slurries |
| Solid Recovery Rate | ≥95% – 99.5% | Efficient capture of particles >2 µm |
| Cake Dryness (DS) | 15% – 50%+ | Organic sludge: 15–30%; inorganic/mineral sludge: up to 50%+ |
| Component | Recommended Material / Configuration | Advantages |
|---|---|---|
| Bowl | Duplex Stainless Steel 2205 / SS316L | Excellent corrosion & wear resistance; ideal for high-chloride environments |
| Scroll Conveyor | SS316L + Hardfacing / Ceramic Tiles | Critical wear part; ceramic or tungsten carbide overlay extends service life 3–5x |
| Housing | SS304 | Corrosion-resistant, clean appearance |
| Differential | Planetary Gearbox or Hydraulic System | Gear: robust & simple; Hydraulic: infinite speed control, high torque |
| Bearings | SKF / FAG / NSK (Tier-1 brands) | Ensures stability at high speeds |
| Feature | Specification |
|---|---|
| Drive Type | Dual-motor dual-VFD (industry standard) • Main motor drives bowl • Auxiliary motor or hydraulic unit drives differential |
| Speed Control | Stepless differential speed adjustment via VFD |
| Control System | PLC + HMI touchscreen; supports remote monitoring (vibration, temperature, current) |
| Safety Protection | Mechanical torque arm + electrical overload protection to prevent jam damage |
| Sector | Typical Applications | Recommended Features |
|---|---|---|
| Municipal & Environmental | • WWTP sludge dewatering • Water treatment plant backwash sludge • River/lake dredging slurry | Standard SS316L, L/D ≥4, VFD control |
| Food & Beverage | • Juice clarification • Soy protein isolation • Starch dewatering • Edible oil refining | Hygienic design (3A/Sanitary), easy-clean surfaces |
| Chemical & Energy | • PVC resin dewatering • TiO₂ washing/classification • Carbide slag treatment • Used oil recovery | Corrosion-resistant alloys, explosion-proof options |
| Oil & Gas | • Drilling mud solids control • Oily sludge three-phase separation (oil/water/solids) | ATEX/IECEx certification, hydraulic differential |
| Mining & Minerals | • Kaolin classification • Calcium carbonate dewatering • Coal preparation plant tailings | Heavy-duty wear protection (ceramic tiles), high-torque drive |
In a world accelerating toward carbon neutrality and zero liquid discharge (ZLD), the decanter centrifuge is no longer just an environmental compliance tool—it’s a value-generating production asset.
As a professional water and sludge treatment solutions provider, we offer not only standard decanter centrifuges but also custom-engineered variants, including:
If you’re seeking the most efficient, cost-effective, and future-ready solution for solid-liquid separation, contact us today for a detailed quotation and tailored technical proposal.
Contact Person: Mr. Vance
Tel: +8615301537517
Fax: 86-0510-87837599
