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)

Three-Phase Decanter Centrifuge (Solid-Liquid-Liquid Separation)

Key Technical Parameters Explained

3. Working Principle

The horizontal screw decanter centrifuge operates on the principle of centrifugal sedimentation:

Separation Process:

1. Feed Introduction: Suspension enters the rapidly rotating bowl via the feed pipe.
2. 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.
3. 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.
4. Discharge:
   • Liquid phase exits continuously over adjustable weir plates.
   • Solid phase (cake) is discharged continuously through the solids outlet at the cone end.

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