GN Separation Equipment Manufacturer

Not long ago, GN Separation has successfully completed the production and delivery of one set hydraulic driven decanter centrifuge, model GNLW364-FHD, for a prominent starch processing facility overseas. The system integrates a hydraulic drive solution from Viscotherm, a globally recognized hydraulic technology brand, marking a milestone in efficient and sustainable separation technology for high-viscosity applications.

How a Hydraulic Decanter Centrifuge Works

Decanter centrifuge is a critical component in industries requiring continuous solid-liquid separation. Its core function lies in exploiting centrifugal force to separate suspended solids from liquids based on density differences. Here’s a breakdown of its operation:

1. Feed Introduction: The slurry (e.g., starch slurry) is pumped into the rotating bowl through a stationary feed tube.
2. Centrifugal Sedimentation: As the bowl rotates at high speeds (typically 2,000–4,000 RPM), centrifugal forces up to 3,000×G push denser solids toward the bowl wall, while the lighter liquid forms an inner layer.
3. Conveyor Mechanism: A screw propeller, rotating slightly faster or slower than the bowl, continuously transports the settled solids toward the conical end of the bowl for discharge.
4. Phase Separation: Clarified liquid exits through adjustable weirs at the cylindrical end, ensuring precise control over the separation efficiency.

In hydraulic drive systems, the rotational motion of the bowl and screw is fully or semi powered by hydraulic motors. Unlike traditional mechanical gearboxes, hydraulic systems offer infinitely variable speed control and dynamic torque adjustment, enabling real-time optimization for fluctuating feed conditions.

Advantages of Hydraulic Drive Systems

The newly delivered GN centrifuge employs Viscotherm hydraulic drive system, a hybrid design combining hydraulic and mechanical elements. The hydraulic driven horizontal screw centrifuge achieves high torque output through the efficient transmission of power by the hydraulic system, making it easy to meet the processing needs of high viscosity and high concentration materials.
1. Stable torque output
The stable torque output provided by the hydraulic drive system ensures the smooth and efficient operation of the equipment, reduces vibration and noise, and improves separation efficiency and stability.
2. Accurate differential control
The hydraulic driven horizontal screw centrifuge can achieve precise differential control through a hydraulic differential. At extremely low differential speeds, it has better stability and accuracy, and can be accurately adjusted within a narrow range of differential speeds. This is very important for some application scenarios that require high separation accuracy;
3. Strong adaptability to harsh working conditions
The hydraulic system has good heat dissipation and sealing performance, so it can operate stably in harsh environments such as high temperature and high humidity
4. Stable sealing performance
The hydraulic system adopts a strict sealing design, effectively isolating external pollutants, protecting the purity of oil products, and reducing downtime due to malfunctions. This design ensures the stability and reliability of the equipment during operation.
5. Small size and light weight
The hydraulic differential has a small volume and light weight. In centrifuge equipment, compared to heavier and larger mechanical differentials, its own weight generates less pressure on the main bearings.

Typical Applications of Hydraulic Decanter Centrifuges

1. Starch & Biofuel Production
2. Wastewater Treatment
3. Chemical & Pharmaceutical
4. Mining & Minerals

GN Separation’s hydraulic decanter centrifuge represents a leap forward in industrial separation technology. For more details on GN’s decanter centrifuges or to schedule a consultation, feel free to contact us.