Technical Specifications and Applications of Horizontal Screw Decanter Centrifuges for Solid-Liquid and Three-Phase Separation
Price:
15000USD-25000USD
MOQ:
1Set
Delivery Time:
30 working days
Brand:
Longdai
Product Description
Horizontal Screw Decanter Centrifuge Technical Documentation
1. Product Overview
The horizontal screw decanter centrifuge (commonly referred to as a "decanter centrifuge") is a highly efficient, continuous solid-liquid separation device widely used in municipal wastewater treatment, industrial effluent processing, and sludge dewatering applications. It utilizes high-speed rotation to generate centrifugal forces (typically 2,000–4,000 times gravity) to rapidly separate solids from liquids in suspensions.
Key Advantages
- Continuous Operation: Capable of 24/7 uninterrupted operation with minimal downtime for maintenance
- High Separation Efficiency: Separation factor up to 2,000–4,000 × g, ensuring high throughput and clarity
- Automated Control: Integrated PLC and HMI systems enable remote monitoring and control
- Energy & Resource Efficient: Low power consumption and reduced chemical usage, aligning with sustainability goals
2. Technical Specifications
Two-Phase Decanter Centrifuge (Solid-Liquid Separation)
| Model | Bowl Diameter (mm) | Capacity (m³/h) | Main Motor Power (kW) | Separation Factor (×g) | Machine Weight (kg) | Dimensions L×W×H (mm) |
|---|---|---|---|---|---|---|
| LW250 | 250 | 2–5 | 7.5–11 | 2,835 | 1,250 | 2,600 × 1,200 × 900 |
| LW350 | 350 | 5–10 | 15–22 | 2,600 | 2,200 | 3,200 × 1,400 × 1,050 |
| LW450 | 450 | 10–18 | 30–45 | 2,450 | 4,200 | 4,300 × 1,490 × 1,150 |
| LW530 | 530 | 15–25 | 45–55 | 2,300 | 6,500 | 4,745 × 1,605 × 1,380 |
| LW650 | 650 | 20–35 | 75–90 | 2,150 | 9,300 | 5,105 × 1,655 × 1,470 |
| LW750 | 750 | 30–50 | 90–132 | 2,033 | 11,000 | 5,500 × 1,800 × 1,600 |
Three-Phase Decanter Centrifuge (Solid-Liquid-Liquid Separation)
| Model | Max. Capacity (m³/h) | Main Motor Power (kW) | Weight (kg) | Dimensions L×W×H (mm) | Application Areas |
|---|---|---|---|---|---|
| LWS450 | 10–18 | 45–55 | 4,200 | 4,300 × 1,490 × 1,150 | Oilfield waste oil, tank bottom sludge |
| LWS530 | 15–25 | 52–67 | 6,500 | 4,745 × 1,605 × 1,380 | Food waste, coal tar |
| LWS650 | 20–35 | 75–120 | 9,300 | 5,105 × 1,655 × 1,470 | Vegetable oil extraction |
Key Technical Parameters Explained
| Parameter | Range / Specification | Description |
|---|---|---|
| Bowl Speed | 1,500–4,000 RPM | Higher speed increases centrifugal force and separation efficiency |
| Length-to-Diameter Ratio | 3:1 to 4:1 | Larger ratio = longer residence time; suitable for fine particles |
| Differential Speed | 5–50 RPM | Speed difference between bowl and scroll; critical for cake transport |
| Separation Factor | 2,000–4,000 × g | Determines separation sharpness and liquid clarity |
| Solid Recovery Rate | >95% | Enhanced by BD plate (beach discharge) technology |
| Cake Moisture Content | 70%–80% | Reduces sludge moisture from ~99% down to 70–80% |
3. Working Principle
The horizontal screw decanter centrifuge operates on the principle of centrifugal sedimentation:
Separation Process:
- Feed Introduction: Suspension enters the rapidly rotating bowl via the feed pipe.
- Centrifugal Separation: Under centrifugal force (typically 3,000–5,000 × g), denser solid particles settle against the bowl wall forming a solid ring, while lighter liquid forms an inner liquid layer.
- Solids Conveying: A scroll conveyor (rotating slightly slower than the bowl due to differential speed) continuously pushes solids toward the conical end of the bowl.
- Discharge:
- Liquid phase exits continuously over adjustable weir plates.
- Solid phase (cake) is discharged continuously through the solids outlet at the cone end.
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4. Application Fields
Environmental & Water Treatment
- Municipal Wastewater: Sludge thickening and dewatering to reduce transport and disposal costs
- Industrial Effluents: Treatment in chemical, pharmaceutical, and food processing industries
- Livestock Wastewater: Manure separation in poultry and livestock farms
- Construction Slurry: Dewatering of tunnel boring (TBM) slurry and pile foundation drilling mud
Other Industrial Applications
- Oil & Gas: Drilling mud solids control, oily sludge treatment, and waste oil recovery
- Food Industry: Plant protein separation, juice clarification, starch dewatering
- Bioenergy: Digestate dewatering from biogas plants, biodiesel production
- Mining: Tailings dewatering and mineral classification
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Company
Jiangsu Longdai Environmental Protection Group Co., Ltd.
Location
No.28, Chengwen West Road, Gaocheng Town, Yixing City, Jiangsu Province, China
Contact Person
Vance