Recently, GN Separation has accomplished the manufacturing and shipment of a hydraulically driven decanter centrifuge, specifically the GNLW364-FHD model, destined for a prominent overseas starch processing plant. This unit incorporates a hydraulic drive solution sourced from Viscotherm, a renowned global hydraulic technology provider, signifying a significant step forward in efficient and eco-friendly separation methods tailored for applications involving high viscosity.

Operating Principles of a Hydraulic Decanter Centrifuge

In industries where continuous solid-liquid separation is crucial, the decanter centrifuge plays a pivotal role. Its fundamental function is to harness centrifugal force to separate liquids from suspended solids, leveraging differences in density. Here’s a brief outline of how it operates:

1. Feed Introduction: A slurry, such as starch slurry, is introduced into the rotating bowl via a fixed feed tube.
2. Centrifugal Sedimentation: As the bowl spins rapidly (typically between 2,000 and 4,000 RPM), centrifugal forces, potentially reaching 3,000×G, push heavier solids towards the bowl’s perimeter, while the lighter liquid remains in the center.
3. Conveyor Action: A screw conveyor, rotating at a slightly different speed than the bowl, continuously moves the settled solids to the conical bowl end for discharge.
4. Phase Separation: The clarified liquid exits through adjustable weirs at the bowl’s cylindrical end, allowing precise management of the separation process.

In hydraulically driven systems, the bowl and screw’s rotational movement is either fully or partially powered by hydraulic motors. Contrary to conventional gearboxes, hydraulic systems provide seamless variable speed control and adjustable torque, facilitating real-time adjustments to accommodate fluctuating feed conditions.

Benefits of Hydraulic Drive Systems

The recently delivered GN centrifuge features a Viscotherm hydraulic drive, a hybrid system blending hydraulic and mechanical components. This hydraulically driven horizontal screw centrifuge achieves impressive torque output through the efficient power transmission of the hydraulic system, easily accommodating materials with high viscosity and concentration.

1. Consistent Torque Output: The hydraulic drive ensures equipment operates smoothly and efficiently, minimizing vibration and noise while enhancing separation effectiveness and stability.
2. Precise Differential Control: Through hydraulic differentials, the centrifuge achieves meticulous differential speed control. It exhibits superior stability and precision at very low differential speeds, allowing fine adjustments within a narrow speed range, crucial for applications demanding high separation accuracy.
3. Robust Adaptability: The hydraulic system’s excellent heat dissipation and sealing capabilities enable it to perform reliably in extreme environments, such as high temperature and humidity.
4. Dependable Sealing: The hydraulic system’s rigorous sealing design effectively keeps out external contaminants, preserving the purity of oil products and minimizing downtime due to malfunctions, thus ensuring operational stability and reliability.
5. Compact and Lightweight: The hydraulic differential’s small size and lightness, compared to heavier mechanical differentials, exert less stress on the main bearings i

Common Applications of Hydraulic Decanter Centrifuges:

1. Starch and Biofuel Manufacturing
2. Wastewater Treatment Processes
3. Chemical and Pharmaceutical Industries
4. Mining and Mineral Processing

GN Separation’s hydraulically driven decanter centrifuge marks a significant advancement in industrial separation technology. For further details on GN’s decanter centrifuges or to arrange a consultation, feel free to reach out to us.