Author: gnadmin

GN Separation is pleased to announce the successful completion and preparation of 8 sets of Stack Vibrating Screens (Fine Sizer models) for shipment to a valued domestic client. This batch marks another milestone in GN’s continued commitment to delivering reliable and efficient fine screening solutions for industrial applications.

GN Stack Vibrating Screen – Tailored for Fine Wet Screening

The GN Stack Vibrating Screen is a self-developed solution specifically designed for wet screening, classification, and dehydration of fine-grained materials. It is widely used across mineral processing, coal preparation, and other industrial sectors that demand high-efficiency particle separation.

Each screen can be configured from 2 to 5 layers to match site-specific operational needs. The stacked configuration offers a compact footprint while significantly improving processing capacity per unit area.

Key Features and Advantages

• Resonance-Based Linear Vibration: Driven by dual vibration motors, the screen uses a two-degree-of-freedom resonance principle to achieve efficient linear vibration.

• Energy Efficient & High Capacity: Offers high screening efficiency, low power consumption, and stable performance.

• Modular & Durable Design: Screen boxes are layered and easy to maintain. The screen mesh is made of high-opening-rate polyurethane (28–45%), with a typical lifespan exceeding 6 months.

• Advanced Corrosion Protection: The screen body undergoes sandblasting and heavy-duty anti-corrosion coating, while surfaces in contact with material are coated with polyurea resin for superior wear resistance.

Feeding Box – Engineered for Efficiency and Longevity

The feeding box adopts a modular design with easy-to-assemble bolt or quick-clamp connections. Key enhancements include:

• Multi-level buffering to slow down material flow, reducing screen damage and wear.

• Material distribution board for even feed across the screen surface.

• Polyurea coating inside the feeding box for extended corrosion and wear resistance.

• Adjustable height to meet various on-site requirements.

Model Options and Technical Parameters

GN offers multiple models for small to large-scale operations, including:

• GND3Z1014 / GND4Z1014 / GND5Z1014

• GND3Z1021 / GND4Z1021 / GND5Z1021

• GND3Z1416 / GND4Z1416 / GND5Z1416

Processing capacities range from 5 to 42 m³/h (dry ore) depending on the screen size and working conditions. Please note that actual capacity varies based on the material and site setup. For specific recommendations, GN technical support is available for consultation.

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Conclusion

With their compact design, large capacity, long service life, and low maintenance requirements, GN Stack Vibrating Screens offer an ideal solution for fine material classification and dewatering. The upcoming delivery of 8 sets to our domestic customer demonstrates strong market confidence in GN’s product quality and technical innovation.

For inquiries about our Stack Vibrating Screens or to request a customized proposal, please contact GN Separation today.

GN Separation is proud to announce the successful delivery of our Dewatering Centrifuge System to an overseas client. This system includes our high-performance GNLW series Decanter Centrifuge and the GNSJY2000 Chemical Dosing Unit, designed to meet the demanding requirements of wastewater treatment and sludge dewatering applications.

GN Dewatering System: Effective Solution for Fine Particle Separation

In many wastewater treatment processes, simple mechanical separation methods can only remove particles in the range of 2–5 microns. However, ultrafine particles, often present in industrial wastewater, are much more difficult to remove using traditional methods.

GN’s Dewatering System provides an efficient solution by combining a high-speed Decanter Centrifuge with a Chemical Dosing Unit. With this integrated system, ultrafine particles can be flocculated into larger, more easily separable clusters, enabling the centrifuge to achieve optimal separation performance and meet the client’s discharge or reuse requirements.

GNSJY2000 Chemical Dosing Unit: Precision and Efficiency

The GN Chemical Dosing Unit is a compact, easy-to-operate, and low-energy consumption system designed for the automatic preparation and dosing of flocculants. It is widely used in sludge dewatering, solid-liquid separation, and various water treatment processes. The dosing compartment allows for stirring, dissolving, and storage of flocculants, which are then delivered to each dosing point by dosing pumps.

To meet various project needs, GN Separation offers two standard types of Chemical Dosing Units:

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1. GN Fully Automatic Dry Powder Dosing Unit (PAM Type)

Configuration Highlights:

Working Principle:

The unit features a three-stage process:

1. Preparation Stage – Chemical powder is fed and mixed with water.

2. Curing Stage – The solution is further dissolved and cured.

3. Storage Stage – The final solution is stored and pumped to the dosing point.

Key Features:

• Fully automatic with PLC control

• Compact design and small footprint

• Easy installation – only water and power connections required

• Corrosion-resistant materials

• Consistent performance with intelligent dry powder dosing adjustment

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2. GN Liquid Flocculant Dosing Unit

Configuration Highlights:

Working Principle:

This unit is ideal for pre-prepared liquid flocculants. Operators can either directly pump pre-mixed solutions or prepare solutions manually by mixing powder and water in the tank. The electric mixer ensures even blending and stable flow.

Key Features:

• Large solution tank volume and energy-saving operation

• Modular design with small footprint

• Easy operation and remote control capability via PLC

• High dosing capacity and stable performance

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Containerized Dosing System – Plug & Play Convenience

GN also provides containerized dosing units that integrate the chemical dosing system into a prefabricated container. This layout simplifies on-site installation and enhances mobility, especially in harsh outdoor environments. Operators can work inside the container with all equipment and control panels protected from the elements.

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Additional Applications of GN Chemical Dosing Units

GN Chemical Dosing Units are not limited to flocculants. They are also suitable for:

• Adding coagulants, filter aids, disinfectants, and pH regulators in water treatment

• Dosing corrosion and scale inhibitors in cooling and circulation systems

• Chemical dosing in industries such as textile dyeing, printing, and manufacturing

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Conclusion

With reliable performance, automation, and customizable design, GN’s Dewatering System continues to be a trusted choice for clients worldwide. Whether for municipal or industrial wastewater treatment, GN Separation’s equipment helps customers achieve efficient and compliant solids-liquid separation.

GN Separation looks forward to working with you on your next project.

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!