The GN GNLS3661 large linear vibrating screen is a high-performance screening machine designed and manufactured by Hebei GN Separation & Conveying Equipment Co., Ltd. It serves as a critical piece of equipment for material classification and dewatering in domestic mining operations, particularly within the iron ore, coal, and non-ferrous metals sectors. Its core function is to efficiently separate solid particles by size or to remove moisture from slurry, which is fundamental to modern mineral processing, coal washing, and tailings management.

The mechanical operation of the GNLS3661 is based on a forced synchronous linear vibration principle. At its heart are two high-power gear-type vibrators, installed on the screen body. These vibrators contain pairs of gears that ensure their shafts rotate synchronously in opposite directions. This counter-rotation generates a powerful, unified (excitation force) along a single, fixed linear path. The entire screen box, supported by robust vibration-damping springs, is driven to perform a reciprocating linear motion. This design is superior to traditional eccentric block vibrators, as it eliminates unbalanced forces, reduces vibration decay, and significantly extends bearing and overall mechanical life. The direction of the excitation force can be adjusted, allowing operators to control the speed and trajectory of material travel across the screen surface for optimized processing.

Structurally, the GNLS3661 is engineered for durability and high capacity. The screen box features side plates formed from single, bent steel plates, eliminating welded seams that are prone to stress cracking. Critical stress points, analyzed and optimized using Finite Element Analysis (FEA), are reinforced to withstand continuous, high-intensity operation. The screening surface is a large-area, high-wear-resistance polyurethane screen panel, which offers excellent performance in wet, sticky, or abrasive conditions. The machine’s modular design facilitates transportation, installation, and maintenance. It can be installed at a positive incline (typically 10-15 degrees) to use gravity to aid material flow, or horizontally to extend retention time for more thorough dewatering, such as in tailings dry discharge systems.

In mining applications, the GNLS3661 demonstrates several definitive advantages that contribute directly to operational efficiency and cost-effectiveness. First is its high processing capacity, capable of handling up to 2500 tons per hour, which meets the demands of large-scale, modern mining facilities. Second is its screening efficiency and precision; the stable linear motion ensures even distribution of material on the screen, preventing segregation and plugging, and allowing for accurate size separation down to 1mm. Third is its exceptional reliability and low maintenance. The gear-type vibrator design and robust construction minimize unscheduled downtime. Key wear parts are easily accessible and replaceable, and the use of long-life components like polyurethane panels reduces the frequency and cost of consumable changes.

A significant application advantage is its role in environmental sustainability and resource recovery. In tailings processing, the GNLS3661 can efficiently dewater slurry to a moisture content below 30%, producing a “cake” suitable for dry stacking. This drastically reduces the volume of wet tailings sent to impoundment ponds, minimizing land use and the associated environmental risks. Similarly, in coal washing plants, it effectively dewaters fine coal slurry, recovering valuable product and reducing the load on water treatment systems.

Finally, the GNLS3661 offers strong adaptability and customization. It can be tailored to specific site layouts, material characteristics, and process requirements, including screen deck configuration, drive motor power, discharge chute design, and integration with automated control systems. This flexibility, combined with localized technical support and spare parts supply, makes it a practical and reliable choice for domestic mining companies seeking to enhance their processing capabilities, lower operating costs, and align with industry trends toward greener and more intelligent mining operations.

The GN-14 inch sludge dewatering centrifuge, a core product of Guanneng Separation and Conveying Equipment Co., Ltd., represents a significant advancement in solid-liquid separation technology for industrial and municipal wastewater treatment. This article will detail the working principle and performance characteristics of this centrifuge, focusing on its application in a system with a 1000L chemical dosing capacity, as recently delivered to a Southeast Asian client.

At its core, the GN-14 inch centrifuge, model GNLW363D-VFD, is a decanter centrifuge designed for continuous operation. Its primary function is to separate solid particles from liquid sludge, significantly reducing volume and weight for disposal. The process begins with the feed sludge, which is first conditioned with flocculants. In a typical 1000L dosing system, polymer solutions are prepared in dedicated tanks and then precisely injected into the sludge stream via metering pumps. This conditioning agglomerates fine solid particles into larger flocs, dramatically improving their separation characteristics within the centrifuge.

The conditioned sludge is then fed into the centrifuge through a stationary inlet pipe. Inside the rotating assembly, separation occurs due to centrifugal force. The centrifuge consists of two main components: a conical cylindrical bowl (the “rotating bowl”) and a scroll conveyor (the “screw”), both rotating at high speeds but with a slight differential. The bowl, with a 14-inch (approximately 355mm) diameter, spins at a variable speed, typically up to 3900 RPM, generating a high centrifugal force field. Under this force, the denser solid flocs are thrown against the bowl’s inner wall, while the clarified liquid, or centrate, forms an inner layer.

The key to continuous operation is the differential speed between the bowl and the scroll. The scroll rotates slightly slower than the bowl. This speed difference causes the scroll to act like a screw, gently conveying the settled solids along the conical section of the bowl toward the discharge ports. This area is often called the “beach,” where further dewatering occurs as the solids are lifted out of the pond of liquid and expelled. Meanwhile, the clarified centrate flows over adjustable weirs at the opposite end of the bowl and is discharged separately. This continuous feed, separation, and discharge process allows for high throughput with minimal operator intervention.

The performance of this system hinges on several key factors. First, the dewatering efficiency is paramount. The GN-14 inch model is engineered to produce a cake with a dry solids content typically between 60% and 75%, a substantial improvement over traditional methods like belt filter presses. This high dryness directly translates to lower transportation and disposal costs. Second, solid recovery rate is critical. The combination of effective polymer dosing from the 1000L system and the precise control of the centrifuge’s parameters ensures a high capture of solids, resulting in a clear centrate that often meets standards for return to the treatment process or discharge.

A major performance feature is its operational flexibility and control, enabled by the Variable Frequency Drive (VFD). Operators can independently and continuously adjust two critical parameters: bowl speed and differential speed. The bowl speed controls the centrifugal force; a higher speed increases separation force for finer particles but also increases energy consumption. The differential speed controls the residence time of solids in the bowl; a lower differential allows solids more time to compact, yielding a drier cake, while a higher differential increases throughput. For the 1000L dosing system, this means the centrifuge can be finely tuned to match the specific characteristics of the sludge and the effectiveness of the chemical conditioning, optimizing performance for varying feed conditions without hardware changes.

Durability and maintenance are built into the design for harsh environments like those in Southeast Asia. The rotating components are constructed from high-grade stainless steel for corrosion resistance. The scroll conveyor, which experiences severe abrasive wear, is protected in critical areas with tungsten carbide hard-facing or replaceable alloy liners, extending service life and reducing downtime. The system is designed for reliability, with features like constant torque control that automatically adjusts the differential speed to prevent plugging under high solids load.

Finally, the system integration aspect is crucial for the client’s ease of use. The centrifuge is not a standalone unit but the heart of a pre-engineered, skid-mounted system. This includes the 1000L polymer preparation and dosing units, feed pumps, control panels, and piping, all assembled and tested at the factory. This modular “plug-and-play” approach drastically reduces on-site installation time and complexity, a significant advantage for international projects. The entire system can be monitored and controlled via a PLC, which manages the dosing pumps and centrifuge parameters, ensuring synchronized and efficient operation.

In summary, the GN-14 inch sludge dewatering centrifuge, integrated with a robust 1000L chemical dosing system, operates on the principle of centrifugal sedimentation and continuous scroll conveyance. Its performance is characterized by high dewatering efficiency, excellent solids recovery, precise operational control via VFD, robust construction for longevity, and seamless system integration. This combination provides a reliable, efficient, and adaptable solution for sludge volume reduction, meeting the stringent demands of modern wastewater treatment facilities in Southeast Asia and beyond.

A shipment of screw  press dewatering machines and flocculant dosing units has been dispatched to an overseas client. This delivery includes the GNDL303 and GNDL304 models of the spiral screw dewatering machine, along with the GNSJY2000L and GNSJY3000L models of the fully automatic flocculant dosing system. These units represent core equipment for modern sludge dewatering and wastewater treatment processes.

The spiral screw dewatering machine, often called a screw press, operates on a continuous mechanical dewatering principle. It consists of a series of fixed and moving circular rings stacked around a central rotating screw shaft. As the screw rotates, it conveys sludge from the inlet towards the discharge end. The key mechanical action is the progressive compression of the sludge as it moves through the gradually narrowing gaps between the fixed and moving rings. This design allows for continuous operation with minimal requirement for pre-concentration of the sludge feed. The GNDL303 and GNDL304 models are engineered for efficiency and reliability, featuring robust construction of the spiral shaft and rings to withstand abrasive materials, integrated spray systems for self-cleaning, and variable frequency drives for precise control of the screw speed and back pressure. This control directly influences the final cake dryness and processing capacity. Their operational advantages include relatively low energy consumption, reduced noise levels, and a compact footprint, making them suitable for municipal wastewater treatment plants and various industrial applications, including food processing and chemical manufacturing.

The effectiveness of the spiral screw dewatering machine is intrinsically linked to optimal sludge conditioning, which is the primary function of the flocculant dosing system. The GNSJY2000L and GNSJY3000L units are integrated systems designed for the automated preparation and injection of chemical agents, primarily polyelectrolytes like polyacrylamide (PAM). The mechanical and control principles of these systems ensure consistent and accurate dosing, which is critical for forming stable flocs that release water efficiently during dewatering.

The working process of the dosing unit involves several stages. First, the dry polymer powder is fed into a wetting funnel, where it is immediately dispersed into a stream of water to prevent the formation of sticky agglomerates or “fish eyes.” This pre-mixed solution then enters a maturation tank equipped with a mechanical agitator. The agitation is carefully controlled to provide sufficient mixing for complete dissolution without excessive shear that could degrade the long polymer chains, reducing their effectiveness. From the maturation tank, the fully prepared stock solution is transferred to a day tank. The heart of the dosing control is the metering pump, typically a diaphragm or peristaltic type, which draws from the day tank and injects the precise volume of polymer solution into the sludge stream. The dosing rate is automatically adjusted by a Programmable Logic Controller (PLC) based on signals from flow meters measuring the incoming sludge. Some advanced systems incorporate a feedback loop from a sludge consistency analyzer to fine-tune the polymer dose for varying sludge characteristics, optimizing consumption and performance.

The synergy between the dosing unit and the dewatering machine is fundamental. The dosing system prepares the sludge by binding fine particles into larger, stronger flocs. These conditioned flocs then enter the spiral press. The mechanical action of the screw transports and compresses the flocculated sludge. The well-formed flocs are robust enough to withstand the shear forces within the press while readily releasing bound water through the gaps between the rings. The separated water, or filtrate, drains through these gaps, while the solid fraction is compacted into a dewatered cake for disposal. An improperly dosed sludge—either under-conditioned or over-conditioned—will lead to poor dewatering performance, manifesting as excessively wet cake, cloudy filtrate, or high polymer consumption.

The integration of these two systems into a cohesive package for export involves careful engineering. Control panels are often unified, allowing operators to monitor and adjust both the polymer preparation/dosing cycle and the screw press operation from a single interface. Safety interlocks are implemented; for example, the spiral press may be prevented from starting if the dosing unit signals a low-level condition in the polymer day tank. For international clients, these systems are equipped with comprehensive documentation, including P&ID (Piping and Instrumentation Diagram), electrical schematics, and operation manuals in English, facilitating correct installation and maintenance.

The dispatch of the GNDL series spiral presses and GNSJY series dosing units underscores their role as a proven, efficient, and automated solution for sludge volume reduction. Their combined mechanical principles—precise chemical conditioning followed by continuous physical compression—deliver reliable dewatering performance essential for meeting the operational and environmental compliance standards of wastewater treatment facilities worldwide.

The GNLW364-VFD Decanter Centrifuge, integrated within GN Solids Control’s containerized sludge dewatering system, represents a core technological solution for overseas wastewater treatment projects. This system, which typically includes the GNLW364-VFD centrifuge, a 2000L polymer dosing unit, and two standard 20-foot containers for housing the equipment, is engineered for rapid deployment, operational efficiency, and adaptability to diverse international environmental standards. Its design philosophy prioritizes modularity, plug-and-play functionality, and compliance with global regulations, making it a practical choice for municipal and industrial sludge treatment in markets with varying infrastructure and technical support capabilities.

At the heart of the system is the GNLW364-VFD decanter centrifuge . This horizontal scroll centrifuge utilizes a variable frequency drive (VFD) for precise control over the bowl and scroll speeds, allowing operators to optimize separation performance for different sludge characteristics, such as varying solid content, viscosity, or particle size distribution. The centrifuge mechanically separates solids from liquids through high-G force, producing a dewatered cake with consistently low moisture content. In overseas applications, this capability directly translates to reduced sludge volume, lowering subsequent transportation and disposal costs—a critical economic factor for many projects. The GNLW364-VFD model is built with robust materials, often featuring corrosion-resistant components, to ensure longevity in challenging environments, including those with high salinity or humidity commonly encountered in Middle Eastern or coastal regions.

Effective chemical conditioning is essential for maximizing dewatering efficiency, particularly with organic or fine-particle sludges. The integrated 2000L polymer dosing unit automates the preparation and injection of flocculants. This unit typically consists of a polymer preparation system, maturation tanks, and precision dosing pumps. It ensures a consistent supply of optimally hydrated polymer solution to the sludge stream ahead of the centrifuge. The automation reduces chemical waste and operator dependency, while the 2000L capacity supports continuous operation over extended periods, minimizing the need for frequent replenishment—an advantage in remote sites with limited logistical support. The dosing is synchronized with the centrifuge’s feed rate, often through a programmable logic controller (PLC), to maintain optimal floc formation and separation clarity regardless of inflow fluctuations.

The use of two 20-foot shipping containers as the equipment enclosures is a defining feature of this solution. This containerized approach offers significant logistical and operational benefits for international projects. First, it standardizes shipping and handling; the entire pre-assembled and pre-tested system can be transported via standard global freight services to any port. Upon arrival, it requires only basic site preparation—a level foundation—and connection to power, water, and inlet/outlet piping. This “plug-and-play” characteristic drastically reduces on-site installation time, civil work requirements, and associated costs. Second, the containers provide a protected, weatherproof environment for the sensitive mechanical and electrical components, shielding them from dust, rain, and extreme temperatures. The layout inside is engineered for safety and maintenance accessibility, with clear walkways, centralized control panels, and strategically placed service points.

For overseas projects, the system’s design inherently addresses common challenges. Its compact footprint, constrained within the container dimensions, is ideal for space-limited sites such as urban wastewater plant upgrades, temporary construction dewatering projects, or industrial parks. The integrated control system often features user interfaces available in multiple languages and simplified operational modes, reducing the training burden for local crews. Furthermore, key components are selected or modified for compatibility with regional electrical standards (e.g., 50Hz/60Hz, various voltage levels) and harsh climatic conditions, such as enhanced cooling systems for hot climates or protective coatings for coastal areas.

From a performance perspective, the combined action of the polymer dosing unit and the decanter centrifuge delivers reliable results. The system can achieve a dewatered sludge cake with a solids content often exceeding 40%, effectively reducing volume by a significant margin. The separated centrate is typically of sufficient quality for return to the head of the treatment plant or for further polishing. This performance meets or exceeds the environmental discharge and sludge handling regulations in many countries, a non-negotiable requirement for project approval and community acceptance.

In summary, the GN Solids Control containerized sludge dewatering system, built around theGNLW364-VFD decanter centrifuge and a 2000L polymer dosing unit housed in two 20-foot containers, provides a turnkey, efficient, and robust solution for international wastewater treatment challenges. Its value proposition lies in its engineering for ease of transport and commissioning, its operational reliability and automation, and its adaptability to local technical and regulatory environments. This makes it a strategically viable option for project developers, engineering contractors, and plant operators seeking effective sludge management solutions in diverse global markets.

GN Solid Control has established itself as a significant supplier of high-performance solids control equipment and drilling waste management systems to clients across the Middle East and North Africa (MENA) region. The company’s success in this critical oil and gas market is largely driven by two core technologies: the solid vacuum pump and the decanter centrifuge. These systems address fundamental challenges in modern drilling operations—efficient solids separation and the reliable, clean transport of waste materials.

The decanter centrifuge is a central component of any advanced solids control system. Its primary function is the continuous separation of fine solids from drilling fluids. The machine operates on the principle of centrifugal sedimentation. A high-speed rotating bowl, or scroll, creates a powerful centrifugal force. As the drilling slurry is fed into the rotating assembly, this force drives the denser solid particles outward against the bowl wall. A helical conveyor, rotating at a slightly different speed, continuously scrapes and conveys the settled solids toward the conical end of the bowl, where they are discharged. The clarified liquid, now with a significantly reduced solids content, flows out from the opposite end. This process is crucial for maintaining optimal drilling fluid properties, controlling mud weight, and reducing overall waste volumes. For MENA clients operating with high-density, weighted muds or dealing with oily cuttings, the centrifuge’s ability to remove particles as fine as 2–5 microns is essential for both operational efficiency and environmental compliance. The reliability of these machines, often built with dual-phase stainless-steel bowls and premium drive components, ensures minimal downtime in demanding desert and offshore environments.

Complementing the separation process is the solid vacuum pump, a technology that revolutionizes the handling and transport of drill cuttings and other semi-solid wastes. Unlike mechanical conveyors, this system operates on an air-driven, non-contact principle. Compressed air is forced through a specialized venturi, creating a powerful vacuum within a sealed chamber. This vacuum, which can reach up to 25 inches of mercury, draws material through an intake hose from sources such as mud pits, tank bottoms, or shaker discharge points. The material is conveyed pneumatically through a pipeline over considerable distances—up to 1000 meters for discharge—and deposited directly into collection containers or the feed hopper of a downstream centrifuge or processing unit. The key advantages for MENA operations are profound. The system eliminates the need for open excavation with excavators, drastically reducing airborne dust, spillage, and safety hazards on the rig site. Its ability to handle high-density, sticky, or abrasive materials with minimal moving parts translates to very low maintenance and high uptime. This makes it ideal for cleaning out reserve pits, transferring cuttings to centralized treatment areas, or handling proppant and other dry powders, all common tasks in the region’s extensive drilling campaigns.

The synergy between these two technologies forms the backbone of efficient and responsible waste management. A typical workflow involves using the solid vacuum pump to collect drill cuttings from various points across the rig site. It transports this slurry directly and cleanly to a decanter centrifuge. The centrifuge then dewaters the slurry, separating it into a dry cake (with moisture content often below 30%) and recovered water. This dry solid is more stable, greatly reduced in volume, and suitable for safe disposal or further treatment, while the water can be treated and potentially reused. This integrated approach directly addresses the tighteningenvironmental regulations in MENA countries, helping operators move away from traditional, non-compliant lagoon-based disposal methods.

GN Solid Control’s penetration into the MENA market is further strengthened by its commitment to localized support and customization. The company provides tailored solutions, selecting appropriate pump models and configuring centrifuge parameters to match specific material characteristics, from high-viscosity oil-based muds to fine desert sands. Furthermore, its equipment is designed with regional conditions in mind, featuring corrosion-resistant components and intrinsically safe, explosion-proof designs for hazardous area operations. This combination of robust, effective technology and responsive service has cemented GN Solid Control’s reputation as a reliable partner for oil and gas operators across the Middle East and North Africa, providing the essential tools for productive and environmentally sound drilling operations.

The GNTBM-500 Slurry Separation System: Engineered for High-Volume Underground and Foundation Engineering in Asia

The GN GNTBM-500 is a high-capacity slurry separation system specifically engineered for the demanding requirements of large-scale underground and foundation engineering projects. With a design processing capacity of 500 cubic meters per hour, it addresses the critical need for efficient, continuous, and reliable management of drilling fluids and excavated spoil in applications such as tunnel boring machine (TBM) operations, diaphragm wall construction, bored piling, and other deep foundation works prevalent across Asia’s rapidly developing infrastructure sector.

Core Technology: Three-Stage Separation for Superior Clarification
The system’s efficacy is rooted in its integrated three-stage purification process. This sequential design ensures maximum solids removal and fluid recovery. The primary stage typically employs a high-frequency vibrating screen to remove coarse particles and large cuttings. The secondary and tertiary stages utilize hydrocyclone units—desanders and desilters—to efficiently separate finer sand and silt particles from the slurry stream. This multi-stage approach is not merely about cleaning; it is a systematic method to maintain the precise rheological properties (viscosity, density) of the drilling fluid, which is paramount for stabilizing boreholes, cooling and lubricating cutting tools, and transporting cuttings to the surface. By delivering cleaner fluid for recirculation, the GNTBM-500 directly contributes to enhanced drilling efficiency, reduced wear on mechanical components, and minimized need for fresh water and chemical additives.

Operational Stability and Control: Integrated Design with VFD
Beyond separation performance, operational reliability under variable site conditions is a key design priority. The GNTBM-500 incorporates integrated slurry storage tanks, which buffer flow and ensure a consistent feed to the separation modules. The inclusion of Variable Frequency Drive (VFD) control for critical pumps and motors is a significant feature. VFD allows for precise, real-time adjustment of motor speed and power consumption based on the instantaneous slurry feed rate and density. This translates to stable system operation under fluctuating loads, protection against motor overload, and substantial energy savings compared to fixed-speed systems. The result is a unit that is not only powerful but also intelligent in its resource utilization, lowering the total operational cost.

Deployment and Adaptability: Modular and Compact Footprint
Recognizing the space constraints and tight timelines characteristic of urban and remote construction sites alike, the GNTBM-500 is built with a modular and compact philosophy. Major components are pre-assembled into skid-mounted or containerized modules. This design drastically reduces on-site installation time and complexity, as modules can be quickly positioned, connected, and commissioned. The compact footprint minimizes the required laydown area, a crucial advantage in congested urban projects or within limited TBM launch site enclosures. Furthermore, modularity offers scalability and flexibility; system configuration can be adapted to specific project needs, and maintenance or component replacement is streamlined.

Meeting Asia’s Infrastructure Demands
The export of the GNTBM-500 to the Asian market aligns with the region’s specific engineering challenges. Megaprojects involving long-distance tunnels, metro systems, and deep foundations in diverse geological conditions—from soft alluvium to hard rock—generate immense volumes of slurry that must be processed responsibly. Efficient separation mitigates environmental impact by reducing the volume of solid waste for disposal and enabling greater water reuse, aligning with increasingly stringent environmental regulations. The system’s high throughput ensures it can keep pace with rapid excavation rates of modern TBMs and large-diameter drilling rigs, preventing slurry handling from becoming a bottleneck to project progress.

In conclusion, the GNTBM-500 is more than a piece of off-the-shelf equipment; it is a targeted engineering solution. It combines robust separation technology with intelligent control and practical, site-friendly design. By delivering reliable, high-volume slurry management, it directly supports the core objectives of contemporary Asian infrastructure development: achieving faster project cycles, ensuring engineering safety and quality, controlling operational costs, and promoting sustainable construction practices. Its deployment signifies a move towards more mechanized and efficient site operations, where specialized systems manage critical support processes, allowing the primary engineering focus to remain on excavation and construction.

Guaneng Solids Control will participate in the 29th China International Trenchless Technology Conference and Exhibition (ITTC 2026), held at the National Exhibition and Convention Center (Tianjin) from April 22 to 24, 2026. The company will be located at booth B27.

This appearance represents a strategic expansion for GN Solids Control. Historically a prominent manufacturer of high-end solids control equipment for the oil and gas sector, the company is now systematically extending its technological expertise into the municipal and civil infrastructure market. Non-destructive excavation, or trenchless technology, is a critical method for installing and rehabilitating underground pipelines, conduits, and cables with minimal surface disruption. Efficient management of drilling fluids, or slurry, is a core requirement in processes like Horizontal Directional Drilling (HDD) and Tunnel Boring Machine (TBM) operations. Ineffective slurry separation can lead to equipment wear, borehole instability, environmental non-compliance, and increased project costs.

At ITTC 2026, GN Solids Control will showcase its specialized solutions designed to address these exact challenges. The key technologies on display will include its HDD Slurry Recycling System, TBM Slurry Separation System, and Drilling Fluid Centrifuges. These systems are engineered to ensure efficient solids removal, facilitate slurry reuse, reduce waste disposal volumes, and support overall project sustainability and cost-effectiveness. The company’s equipment is noted for its robust construction, modular design, and adaptability to the demanding, continuous-operation environments typical of major infrastructure projects.

The choice of this particular exhibition is significant. ITTC 2026, organized by the China Society for Trenchless Technology (CSTT) and the International Society for Trenchless Technology (ISTT), is a premier industry event in Asia. It attracts a concentrated audience of engineering contractors, municipal utility providers, project planners, and procurement specialists from across the region. For GN, this platform provides an optimal opportunity to engage directly with decision-makers in the growing urban infrastructure sector, a market driven by aging utility network upgrades, new metro system construction, and the development of utility tunnels.

To maximize its impact, GN Solids Control plans a multi-faceted engagement strategy at its booth. This will include technical demonstrations, detailed case study presentations on large-scale projects, and interactive discussions with its engineering team. Furthermore, the company is organizing dedicated transportation for serious prospects from the exhibition hall to its manufacturing base in Langfang, Hebei, for a comprehensive facility tour and live equipment testing. This “exhibition-to-factory” initiative is designed to provide an in-depth verification of product quality, manufacturing capabilities, and technical support services.

The company’s participation underscores a broader industry trend: the increasing convergence of specialized industrial equipment technologies across different application fields. The rigorous performance standards developed for oilfield drilling are now being successfully applied to solve complex problems in urban construction. GN’s move into this space highlights the potential for cross-industry technological transfer and the role of specialized Chinese equipment manufacturers in supporting global infrastructure development.

Industry professionals attending ITTC 2026 are invited to visit GN Solids Control at booth B27 to examine the equipment, discuss specific project requirements, and explore potential technical collaborations. Detailed information about the company and its product range is also available through its official channels.

The GN Screw Press Dewatering Machine is a high-efficiency solid-liquid separation device specifically designed for industrial organic wastewater treatment. In recent years, its application value and market potential have become increasingly prominent within the global wastewater treatment sector, particularly for overseas food processing plants. Its core advantages—including compact structure, stable operation, high automation, low energy consumption, simple maintenance, and independence from large sludge thickening tanks—make it exceptionally well-suited for the complex, intermittent, high-organic-load, and space-constrained conditions typical of food factory wastewater. This equipment has been successfully deployed in numerous overseas projects, establishing itself as a key technological asset in promoting the green transformation and resource recycling of the food industry.

The operational principle of the screw press dewatering machine is based on the synergistic effect of spiral extrusion and micro-gap filtration. Its core structure consists of a spiral shaft, moving rings, fixed rings, a drive unit, a cleaning system, and an intelligent control system. Sludge entering the device is gradually pushed toward the discharge end by the continuous rotation of the spiral shaft. As the pitch of the spiral decreases and its diameter increases from the feed end to the discharge end, a progressively intensifying compressive force is generated. Driven by the spiral blades, the sludge is held within the minute gaps formed between the moving and fixed rings. Under pressure, water is forcibly extruded and discharged through the filter gaps, while solid particles are continuously compacted, ultimately forming a dense filter cake with a moisture content below 80% that is discharged from the machine’s end. This process eliminates the need for filter cloths, avoiding the operational interruptions common in traditional filter presses caused by cloth clogging and frequent replacements. It enables continuous, stable, and fully automated operation, making it ideal for food plants running 24/7.

The primary challenges in wastewater treatment for the food processing industry stem from the complex composition of the sludge, which typically has high organic content, strong viscosity, and an initial moisture content often exceeding 95%. Common sources include blood water and animal offal residues from slaughterhouses; fruit pulp, peels, and pits from juice plants; whey and cheese residues from dairy facilities; molasses sediments from sugar refineries; and yeast residues from breweries. Direct discharge of untreated sludge can cause severe water pollution, lead to eutrophication due to high BOD/COD levels, and potentially spread pathogenic microorganisms. Utilizing its unique mechanical extrusion mechanism, the screw press effectively handles such high-viscosity, high-organic-load sludge. The resulting filter cake maintains a stable moisture content between 75% and 80%, achieving a volume reduction of over 80%. This significantly lowers the comprehensive costs associated with subsequent transportation, landfilling, or resource recovery. Crucially, the dewatered cake is dense, non-sticky, and does not release water, allowing it to be directly used as an additive for animal feed, a raw material for organic fertilizer, or for energy recovery (e.g., incineration for power generation), thereby meeting both waste reduction and resource recovery objectives.

As a leading domestic manufacturer of separation and conveying equipment, GN Solids Control has developed a complete technological ecosystem for its screw press dewatering systems. The company provides not only the main machine but also a self-developed automatic dosing system for the precise addition and intelligent control of flocculants like PAM. In food plant wastewater treatment, sludge typically requires conditioning to improve its dewaterability. Guaneng tailors dosing solutions based on the specific water quality parameters (such as COD, SS, pH, and grease content) of overseas clients, ensuring optimal flocculation while avoiding chemical waste or incomplete dewatering. This integrated “host machine + dosing” model addresses common pain points for overseas customers, such as system incompatibility, difficult commissioning, and low operational efficiency resulting from sourcing equipment from multiple suppliers, thereby significantly enhancing the overall solution’s reliability and cost-effectiveness.

In overseas markets, GN screw presses have been successfully exported to regions including Europe, Southeast Asia, and the Middle East. For instance, Hebei Guaneng recently delivered three sets of customized decanter centrifuge systems to a European wastewater treatment plant. This integrated system includes a coarse screening module (GNLMP-1536), a double-layer fine screening module (GNZS596K), a desander module (GNZJ594J-8N), a decanter centrifuge module (GNLW553D-VFD), and a 20-foot chemical flocculation dosing module, forming a complete process chain from pre-treatment to deep dewatering. The system not only meets Europe’s stringent environmental discharge standards but has also gained high customer approval for its low energy consumption, low noise, modular design, and remote monitoring capabilities. Furthermore, the company has shipped combined vibrating screen and decanter centrifuge equipment to a European environmental enterprise. Adopting the internationally mainstream “primary screening + secondary centrifugation” process, this setup effectively removes large suspended solids before performing efficient dewatering, extending the core equipment’s service life while improving cake dryness. This process model has been widely adopted in numerous food processing plants across Europe and America.

In overseas applications, GN screw presses fully demonstrate their advantages of being “compact yet sophisticated, stable and durable.” Compared to traditional plate-and-frame filter presses or belt filter presses, screw presses require significantly less floor space and eliminate the need for large sludge thickening tanks, making them particularly suitable for overseas sites with limited land. They operate with low noise, require no high-pressure pump systems, and consume only 30% to 50% of the energy used by traditional equipment. Maintenance is straightforward, involving only regular cleaning of the filter gaps without the need for cloth replacement, leading to substantially lower annual maintenance costs. Constructed from corrosion-resistant stainless steel (304/316), the equipment withstands the harsh, humid, saline, and greasy environments typical of food plants, with a service life exceeding 8-10 years. Importantly, their fully automated operation, combined with remote control and fault early-warning systems, enables unattended operation, drastically reducing the operational labor costs for overseas factories and aligning with the local trend of “automation replacing manual labor.”

Against the backdrop of increasingly stringent global environmental policies, the food industry faces mounting pressure from strict wastewater discharge standards and carbon emission regulations. Initiatives such as the EU’s Green Deal, the U.S. EPA’s COD limits for food processing wastewater, and “zero liquid discharge” pilot programs in several Southeast Asian countries are driving companies to seek efficient, low-carbon, and sustainable sludge treatment solutions. The Guaneng screw press, with its characteristics of “low energy consumption, low chemical consumption, and high recovery rate,” perfectly aligns with this trend. The dewatered filter cake can be exported or used locally in agriculture as an organic fertilizer raw material, creating a closed-loop cycle from “wastewater-sludge-resource.” This not only ensures compliance but also generates additional economic value and enhances a company’s ESG (Environmental, Social, and Governance) rating.

Furthermore, GN’s product design thoroughly considers the usage habits and installation conditions of overseas clients. Equipment is packaged in standard 20-foot containers for easy sea freight and on-site hoisting. Control systems support multi-language interfaces (e.g., English, French, Spanish, Arabic) and comply with international electrical standards (such as CE, UL, IEC). The after-sales service system, featuring remote diagnostics, video guidance, and global spare parts warehousing and distribution, ensures rapid response and continuous operation for international customers. Feedback from multiple delivered projects indicates that installation time is reduced by an average of 40%, commissioning is typically completed within three days, and operational stability exceeds 98%, far surpassing industry averages.

GN Solids Control has successfully delivered four sets of specialized slurry purification systems to a European non-excavation client, marking a significant expansion of its advanced solid control equipment in the international market. This shipment consists of three GNMS-200C units with a processing capacity of 200 gallons per minute (GPM) and one GNMS-1500 unit with a processing capacity of 1500 GPM. These systems are engineered to meet the rigorous demands of European trenchless technology projects, which require high efficiency, reliability, compact design, and strict environmental compliance.

The GNMS series is a fully integrated slurry purification solution designed specifically for the constraints and requirements of non-excavation drilling operations, such as horizontal directional drilling (HDD), pipe jacking, and microtunneling. In urban and environmentally sensitive areas across Europe, these methods minimize surface disruption, but they place unique demands on supporting equipment. Slurry systems must be capable of handling varying soil conditions, maintaining fluid properties for efficient drilling, and ensuring that waste management complies with local environmental regulations. The delivered systems address these needs through a combination of modular design, automated controls, and proven separation technology.

Each system incorporates a multi-stage purification process. The primary stage typically includes high-capacity shale shakers for coarse solids removal, capable of handling high flow rates while minimizing screen blinding. The secondary and tertiary stages often integrate desanders, desilters, and centrifuges to remove fine particles and colloids, which is critical for maintaining slurry density and viscosity. The GNMS-1500 unit, with its larger capacity, is suitable for major infrastructure projects involving long-distance or large-diameter drills, while the GNMS-200C units offer flexible deployment for smaller-scale or multiple simultaneous operations. All units are built with a compact footprint, a key consideration for European job sites where space is often limited.

A core advantage of these systems is their focus on environmental sustainability and operational economy. By efficiently removing solids from the drilling fluid, the systems enable a high rate of slurry recycling—often exceeding 90%—which drastically reduces the consumption of fresh water and bentonite or polymer additives. This closed-loop operation not only lowers material costs but also minimizes the volume of waste slurry that requires off-site disposal. Furthermore, the advanced dewatering capabilities, potentially including integrated decanter centrifuges or filter presses, produce drier solids (cake) that are easier, safer, and cheaper to transport and dispose of in accordance with EU waste directives.

The design and manufacturing of these systems adhere to stringent international standards, including CE certification for the European market. This ensures all electrical components, safety features, and pressure equipment meet EU health, safety, and environmental protection requirements. Robust construction and the use of wear-resistant materials are employed to guarantee durability and long service life under continuous operation, reducing total cost of ownership for the client.

Beyond the hardware, this successful delivery underscores GN Solids Control’s commitment to providing comprehensive technical support and customer service. This likely involved pre-sale engineering consultations to tailor the system configuration to the client’s specific geological conditions and project parameters, thorough factory acceptance testing, and detailed documentation. Post-delivery support typically includes on-site installation supervision, operator training, and readily available spare parts through local or regional service networks, ensuring minimal downtime.

This transaction represents a strategic achievement for GN Solids Control in the competitive European non-excavation sector. It demonstrates the company’s ability to develop and deliver technically sophisticated, reliable, and environmentally sound solutions that meet the high expectations of European engineering firms and contractors. The trust placed by this client serves as a strong reference, potentially facilitating further market penetration. For the European client, acquiring these systems enhances their operational capabilities, allowing for more efficient, cleaner, and cost-effective project execution in the growing trenchless technology market.

In conclusion, the export of these four GNMS slurry purification systems is a practical demonstration of global engineering and manufacturing collaboration. It provides the European client with the advanced tools necessary for modern non-excavation projects, while simultaneously showcasing GN Solids Control’s expertise and commitment to innovation in the global solid control industry.

We are excited to announce that GN Solids Control will be participating in the 26th China International Petroleum & Petrochemical Technology and Equipment Exhibition (CIPPE 2026), the premier oil and gas industry event in Asia. This is a fantastic opportunity to explore the latest innovations in solids control, waste management, and drilling fluids equipment.

Show Name: The 26th China International Petroleum & Petrochemical Technology and Equipment

Exhibition Dates: March 26–28, 2026

Venue: China International Exhibition Center (New Venue) – Shunyi Hall, Beijing, China

GN Booth No.: E2168

At our booth, you will discover our latest advancements in shale shakers, decanter centrifuges, mud cleaners, centrifugal pumps, and complete LMP systems. Our team of experts will be on hand to discuss your project requirements and demonstrate how GN’s solutions can improve efficiency and reduce costs in your drilling operations.

Why visit GN Solids Control at CIPPE?Meet our engineering and sales team face-to-face.Learn about our customized solutions for onshore and offshore drilling.See live demonstrations of our equipment.Discuss your specific challenges and get expert advice.

We cordially invite all industry professionals, partners, and friends to visit us at Booth E2168. Come and experience the quality and reliability that GN Solids Control brings to the global market.