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In wastewater treatment processes, the ability to effectively separate ultrafine particles is crucial for achieving regulatory discharge standards and protecting downstream equipment.  Chemical Dosing Unit plays a vital role in enhancing solid-liquid separation by enabling precise chemical conditioning of wastewater. When paired with a high-speed decanter centrifuge, the GN Chemical Dosing Unit allows for the removal of particles much smaller than 2–5 microns—something that traditional mechanical methods alone cannot achieve.

Compact and Reliable Chemical Dosing for Wastewater Applications

The GN Chemical Dosing Unit is an integral part of GN’s Dewatering System. This unit is designed to prepare, dissolve, and dose flocculants and other treatment chemicals to improve the efficiency of particle separation. With a compact footprint, corrosion-resistant materials, and low energy consumption, it provides both performance and convenience for a wide range of industrial applications.

GN offers two standard models to meet different chemical dosing needs:

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1. GN Full Automatic Dry Powder Dosing Unit (PAM)

This model is engineered for precise and automatic preparation of dry powder flocculants. It features a three-compartment stainless steel cabinet that manages the entire preparation cycle: Preparation, Curing, and Storage.

Key Features:

• Integrated design with stainless steel construction.

• Fully automatic PLC control system.

• High accuracy and consistent dosing performance.

• Designed for safe and reliable operation with multiple safety valves and alarms.

• All wetted parts are made of corrosion-resistant plastic or stainless steel.

• Suitable for a variety of chemical forms including powders, granules, and fibrous additives.

Working Principle:

The system mixes the dry powder flocculant with water in stages:

1. In the Stirring Dissolving Tank, the powder is thoroughly mixed with water.

2. The solution then moves to the Curing Tank for additional blending and reaction time.

3. Once ready, the final solution flows into the Storage Tank and is delivered to dosing points by precision dosing pumps.

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2. GN Single Barrel Liquid Chemical Dosing Unit (PAC)

This system is designed for dosing liquid flocculants or coagulants. The dosing unit includes a mixing tank equipped with a stirrer and is available in either a PE barrel with a metal shell or a fully stainless-steel configuration.

Key Features:

• Large capacity mixing tank with stable performance and low energy usage.

• Compact design, small footprint, and easy installation.

• Fully automated dosing with PLC-based control; remote operation is also available.

• High dosing flow rate with easy maintenance access.

Working Principle:

Operators can either pre-configure the liquid chemical and pump it into the tank, or manually add dry powder chemicals and mix with water in the correct proportion. The solution is then continuously stirred to ensure uniformity before being dosed into the treatment process.

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Containerized Chemical Dosing System for Harsh Environments

For demanding project sites or outdoor installations, GN offers containerized chemical dosing solutions. These systems integrate the dosing unit within a standard container that is weatherproof, easy to transport, and ready to operate. All inlet and outlet ports are pre-reserved for fast connection to external equipment, and the container provides a safe, sheltered environment for operators.

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Broader Applications of GN Chemical Dosing Units

GN Chemical Dosing Units are versatile and can be used across industries for:

• Water treatment: Adding coagulants, flocculants, disinfectants, acids, and alkalis.

• Cooling systems: Dosing corrosion and scale inhibitors.

• Chemical processing, printing, and dyeing: Dosing various liquid reagents and pH control agents.

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Whether your project requires dry powder or liquid chemical dosing, GN offers customized solutions tailored to your flow rate, chemical type, and operating conditions. With proven reliability and efficiency, our Chemical Dosing Units enhance the performance of wastewater treatment systems, helping clients meet strict environmental standards.

GN Separation – Your Partner in Efficient Separation Solutions.

GN Separation is excited to announce our participation in IE Expo China 2025, one of the leading environmental technology trade shows in Asia. The event will take place from April 21-23, 2025, at the Shanghai New International Expo Centre. We invite you to visit us at Booth W5-D76 to explore our innovative sludge dewatering solutions, including our Screw Press Sludge Dewatering Machine.

GN Screw Press Sludge Dewatering Machine – Efficient & Eco-friendly Solution

GN Screw Press Sludge Dewatering Machine is an economical and environmentally friendly sludge dewatering solution. This advanced equipment utilizes the principle of screw extrusion, leveraging the strong squeezing force generated by changes in screw diameter and pitch, as well as the precise gap between the floating and fixed rings, to achieve effective solid-liquid separation.

Key Features of GN Screw Press Dewatering Machine:

• Fully Automatic Operation – Equipped with an automatic control cabinet, flocculation modulation box, sludge thickening and dewatering device, and liquid collection tank.
• Continuous and Stable Performance – The machine performs sludge thickening and dewatering seamlessly while ensuring reliable filtrate discharge or return.
• Wide Application Range – Suitable for municipal, aquaculture, food processing, starch, oil, pharmaceutical, chemical, paper, and leather industries.
• Energy-Saving & Low Maintenance – Low operating costs with minimal energy consumption, reducing environmental impact.

Technical Specifications

GN offers a full range of screw press dewatering machines with varying capacities to meet different sludge treatment requirements. Below are some key technical parameters:

Model	DS Standard Capacity (kg/h)	Sludge Capacity (m³/h)	Screw Diameter (mm)	Total Power (KW)	Weight (KG)
GNDL131	4-14	~2	130	0.4	205
GNDL201	8-20	~4	200	0.57	290
GNDL301	20-70	~10	300	0.95	820
GNDL401	67.5-160	~33.7	400	1.65	1990
GNDL404	266-640	~133	400	7.5	6170

For a complete list of models and specifications, please contact us.

Advantages of GN Screw Press Dewatering Machine

• Handles Various Sludge Types – Effective for a wide range of sludge, including oily sludge.
• No Clogging Issues – The self-cleaning moving ring prevents blockages.
• Compact and Space-Saving Design – Requires minimal installation space.
• Low Energy Consumption – More efficient compared to filter presses and decanter centrifuges.

Comparison of Sludge Dewatering Technologies

Type	Energy Consumption	Automation	Investment	Oily Sludge Handling
Screw Press	Low	High	Low	Moderate
Filter Press	Moderate	Low	High	Low
Decanter Centrifuge	High	High	High	High

Customizable Solutions from GN Separation

GN Separation offers a complete range of sludge dewatering equipment, allowing clients to choose the best solution based on their specific wastewater treatment requirements and investment budgets. Additionally, we provide integrated mobile sludge dewatering solutions tailored to customer needs.

Visit GN Separation at IE Expo China 2025!

We look forward to meeting you at Booth W5-D76 during IE Expo China 2025 in Shanghai. Discover how GN’s Screw Press Sludge Dewatering Machine can optimize your sludge treatment process with high efficiency and cost-effectiveness.

For more information, feel free to contact us. GN Separation looks forward to working with you!

 

GN Separation is proud to announce the successful shipment of a GNLW764-VFD dewatering centrifuge system to a mining company in South America. This system is designed to efficiently handle tailings slurry, providing an effective dewatering solution for the mining industry.

Core Equipment in the System

The system includes the following key components:

• GNLW764-VFD Dewatering Decanter Centrifuge – A high-performance centrifuge designed for maximum dewatering efficiency.
• GNSJY-6000 Chemical Dosing Unit – A flocculant dosing system that enhances solid-liquid separation.
• Skid Frame with Receiving Tank – Designed for convenient installation, allowing efficient handling and pre-reception of tailings slurry.

About the GNLW764-VFD Dewatering Decanter Centrifuge

The GNLW764-VFD is part of GN’s T Series decanter centrifuges, specifically designed for dewatering and sludge thickening applications. It features a beach angle of 8.5 degrees, ensuring enhanced solid-liquid separation and drier discharged solids.

Advantages of the GNLW764-VFD

✔ Large Processing Capacity – Designed to handle high volumes of tailings slurry.
✔ Efficient Dewatering – The optimized design allows for higher dryness of discharged solids.
✔ Robust Construction – Made from duplex stainless steel (SUS2304/SUS2205) for superior corrosion and wear resistance.
✔ Variable Frequency Drive (VFD) Control – Provides adjustable settings for different operational needs.
✔ High Durability – Wear-resistant tungsten carbide sleeves for longer service life.

Application of GN T-Series Decanter Centrifuges

The T-Series dewatering centrifuges are widely used across various industries for separating solid-liquid mixtures, including:
✔ Mining & Mineral Processing – Efficient tailings dewatering and recovery.
✔ Drilling Mud Treatment – Separation of drilling fluids and solids.
✔ Wastewater Treatment – Processing industrial and municipal sludge.
✔ Chemical & Pharmaceutical Industries – Separation of fine particles and sludge.

Why GN Separation?

GN Separation has extensive experience in designing and manufacturing decanter centrifuges, offering customized solutions to meet different industry needs. Our high-efficiency dewatering systems help clients reduce waste, optimize resource recovery, and improve environmental sustainability.

For more information about our dewatering centrifuge solutions, feel free to contact us. GN Separation looks forward to working with you!

At GN Separation, we specialize in providing innovative solutions for industrial separation needs. With over 10 years of experience, we have earned a strong reputation for delivering high-performance equipment. One of our standout products is the GN 3 Phase Decanter Centrifuge, designed for efficient solid-liquid-liquid separation. Recently, we have successfully shipped this cutting-edge technology to a client in South America, offering them a reliable solution for their oily sludge treatment process.

Three-Phase Separation Solution for Oily Sludge Treatment

Our GN 3 Phase Decanter Centrifuge is the perfect solution for industries that require the separation of oil, water, and solids. It excels in separating these three phases, ensuring a clean and efficient output, whether it’s for oil recovery, wastewater treatment, or other industrial applications.

This 3 Phase Decanter Centrifuge operates based on the principle of sedimentation, where the solid particles and two immiscible liquid phases with different densities are separated under high centrifugal force. When the mixture enters the high-speed rotating drum, the material is subjected to centrifugal force, causing the heaviest particles (solids) to settle first, followed by the heavier liquid phase (water), and finally the lighter liquid phase (oil).

The machine’s unique design includes a driving system, decanter bowl, screw conveyor, cover box, skid, and VFD control panel, allowing it to operate continuously for 24 hours, ensuring seamless and efficient performance. The GN 3 Phase Decanter Centrifuge can handle feed materials with less than 10% solids and particle sizes of less than 2mm, making it suitable for a variety of industrial applications, including oil recovery from oily sludge.

Modular Design for Complete Oil Sludge Treatment

Our solution for oily sludge treatment is built around three key modules:

1. Mud Conveying Module
   The mud conveying system ensures a smooth flow of materials to the decanter centrifuge. The equipment is designed to transport sludge efficiently, preparing it for the separation process. This system helps minimize material loss and optimizes overall processing time.

2. Tank Cleaning and Sludge Settling Module (Slant Plate Clarifier)
   GN Separation’s Slant Plate Clarifiers play a key role in washing and settling oil tank sludge. This module helps separate the bulk of solids and water before the material is sent to the decanter centrifuge. By utilizing inclined plates, this system accelerates the settling process, improving the efficiency of the subsequent separation stages.

3. Three-Phase Decanter Centrifuge Module
   The GN 3 Phase Decanter Centrifuge is the heart of the separation process. Its high-performance design ensures efficient separation of oil, water, and solids. This technology is crucial for industries that need to recover oil from sludge while separating water and solids for proper disposal or treatment.

Specifications of GN 3 Phase Decanter Centrifuge

Our GN 3 Phase Decanter Centrifuge is available in various models, with the following specifications:

• Model Options: GNLWS-364, GNLWS-454, GNLWS-554
• Capacity: 5 m³/h, 10 m³/h, 15 m³/h
• Max Speed: Up to 3986 RPM
• Max G Force: Up to 3200 G
• Main Drive Power: From 22 KW to 75 KW
• Material: Duplex Stainless Steel SS2205
• Screw Conveyor Wear Protection: Tungsten Carbide Tiles

These specifications make the GN 3 Phase Decanter Centrifuge an ideal choice for various industries, including oil recovery, chemical processing, and wastewater treatment. The equipment is highly customizable, offering adjustable separation mechanisms to meet specific client needs, such as the proportion of the two liquid phases.

Adjustable Separation for Flexible Operation

The GN 3 Phase Decanter Centrifuge also features an adjustable impeller that allows operators to fine-tune the separation process based on the proportion of the two liquid phases. This flexibility helps optimize the separation results and ensures high efficiency throughout the operation. The adjustable impeller allows for easy modification of the separation line during ongoing operations, making it suitable for varying conditions.

A Successful Partnership with South American Clients

This recent shipment to a South American customer showcases GN Separation’s ability to meet the diverse needs of clients around the world. By providing high-quality equipment and support, we are proud to assist our customers in improving their operations and achieving better separation results in oily sludge treatment.

At GN Separation, we look forward to expanding our global presence and continuing to deliver cutting-edge separation solutions to clients across the globe. Whether you’re handling oil sludge, wastewater, or any other industrial separation challenge, our technology is designed to provide efficient, reliable, and cost-effective results.

For more information on our GN 3 Phase Decanter Centrifuge and other separation solutions, feel free to contact us. We are always here to help with your separation needs.

GN Separation looks forward to working with you.

GN Separation is proud to introduce the GN Synergistic Frequency Vibrating Screen, a cutting-edge product developed to offer unmatched performance in screening, grading, and separation of fine-grained materials. This innovative machine combines linear vibration frequency with partial electromagnetic vibration frequency to deliver exceptional results in various industries, including coal, metallurgical mineral processing, chemicals, and ceramics.

Dual Vibration Mechanism for Superior Efficiency

At the heart of the GN Synergistic Frequency Vibrating Screen is its unique dual vibration principle. The screen utilizes both electromagnetic excitation and motor-driven linear vibration to achieve outstanding performance. The electromagnetic exciter drives the screen mesh to create instant, powerful vibrations, while the motor generates linear vibration to move the material across the screen surface. This synergistic effect enhances the screening process, improving material flow and separation efficiency.

Key Features of the GN Synergistic Frequency Vibrating Screen

• Self-Cleaning Screen Mesh: The electromagnetic excitation ensures the screen mesh is constantly excited, preventing blockages and promoting self-cleaning. This feature makes the machine highly effective in screening fine materials without frequent maintenance.

• Independent Control of Electromagnetic Excitation: The amplitude of the electromagnetic vibration can be adjusted to meet the specific needs of different screen positions, ensuring flexibility and adaptability in various working conditions.

• High Screening Efficiency: The dual motor setup provides smooth and efficient material transport across the screen surface, resulting in high screening efficiency and improved throughput.

• Water Spray Device: Equipped with a water spray system, the machine helps fully disperse the material on the screen surface, boosting the screening rate and ensuring a cleaner, more accurate separation.

• Durable Design: The flow-through parts of the equipment are sprayed with polyurea, enhancing wear resistance and corrosion protection, thus extending the service life of the vibrating screen.

Versatile Applications

The GN Synergistic Frequency Vibrating Screen excels in various industries where fine-grained material separation is critical. It is particularly beneficial in coal processing, metallurgical mineral processing, chemical manufacturing, and ceramics, among others.

Technical Parameters

Model	GNFk2020	GNFk2030
Screen Deck Layer	1 Layer	1 Layer
Screen Area	4㎡	6㎡
Linear Vibration Amplitude (Double)	0-3mm	0-3mm
Electromagnetic Vibration Amplitude (Double)	0-2mm	0-2mm
Total Power (Output)	5.4kW	7kW
Motor/Electromagnetic Vibration Frequency	16/50Hz	16/50Hz
Screen Surface Angle	16±2°	16±2°
Mesh Size	0.045 – 3 mm	0.045 – 3 mm
Capacity (for Dry Ore m³/h)	5～25	5～25

Note: The above parameters are for reference only and can be adjusted based on customer requirements. For precise details, please consult GN Separation.

Enhanced Performance for Different Materials

The GN Synergistic Frequency Vibrating Screen’s performance can vary based on the material type and working conditions. The combination of linear and electromagnetic vibrations ensures that the screen can handle a wide range of materials efficiently, offering high throughput and precise separation.

Conclusion

GN Separation’s Synergistic Frequency Vibrating Screen represents a breakthrough in screening technology, offering high efficiency, durability, and versatility. Its self-cleaning screen mesh, adjustable vibration amplitudes, and robust design make it an ideal solution for industries where fine-grained material separation is essential.

For more information or to discuss how the GN Synergistic Frequency Vibrating Screen can improve your operations, contact GN Separation today. We look forward to helping you find the perfect solution for your screening needs.