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Technical Specifications and Applications of Horizontal Screw Decanter Centrifuges for Solid-Liquid and Three-Phase Separation

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Technical Specifications and Applications of Horizontal Screw Decanter Centrifuges for Solid-Liquid and Three-Phase Separation

Name: Technical Specifications and Applications of Horizontal Screw Decanter Centrifuges for SolidLiquid and ThreePhase Separation
Brand: Longdai
Price: 15000 USD

Brand Name : Longdai

Model Number : LW

Place of Origin : China

MOQ : 1Set

Price : 15000USD-25000USD

Payment Terms : L/C,D/A,D/P,T/T,Western Union,MoneyGram

Supply Ability : 100Set Per Month

Delivery Time : 30 working days

Packaging Details : Wooden or customized

Bowl Sped : 4000r/min

Material : SS304

Machinery : separation centrifuge

Easy maintenance : Quick disassembly and cleaning

Collocation : Double motor with double transduce

Drum Speed : Appr 3200r/min

Weight : 1400

Features : Continuous operation, high efficiency, low maintenance

Discharge Type : Spiral Screw Discharge

Centrifuge Type : decanter centrifuge

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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.

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

Technical Specifications and Applications of Horizontal Screw Decanter Centrifuges for Solid-Liquid and Three-Phase Separation

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