Used Alfa Laval screw contrifuge ALDEC G2-100

Different Parameters, Different Price.
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Introduction

Specification

Category	Specification
Drum Parameters
Drum inner diameter	575/326 mm (two-stage diameter)
Drum length	Approx. 2100 mm (length-to-diameter ratio ≈3.65)
Half cone angle	10°
Maximum drum speed	2900 rpm
Separation factor	Approx. 2300 G
Material & Operation Parameters
Maximum solid density	1.9 kg/dm³
Processing temperature range	0~100 °C
Processing capacity	Approx. 5~8 m³/h (varies with solids content, based on municipal sludge as example)
Differential speed range	2~40 rpm (adjustable)
Material & Structure
Drum / Screw	AISI 316 stainless steel
Wetted parts	AISI 316 stainless steel (wear-resistant liner optional)
Frame	Carbon steel (with surface anti-corrosion treatment)
Power & Control
Main drive motor	18.5~22 kW
Screw drive motor	7.5~11 kW
Control system	Standard PLC + HMI, supports constant differential speed / constant torque control
Dimensions & Weight
Overall dimensions	Approx. 4000×900×1400 mm

Working principle

Separation takes place in a horizontal cylindrical bowl equipped with a screw conveyor. The feed enters the bowl through a stationary inlet and is accelerated smoothly by an inlet rotor. Centrifugal forces cause sedimentation of the solids on the wall of the bowl. The conveyor rotates in the same direction as the bowl, but at a different speed, thus moving the solids towards the conical end of the bowl. The new design enables the hydraulic pressure inside the bowl to enhance sealing through a narrow opening. Only the driest fraction of the cake leaves the bowl through the solids discharge openings into the casing. Separation takes place throughout the total length of the cylindrical part of the bowl, and the clarified liquid leaves the bowl by flowing over adjustable plate dams into the casing.