GNTBM-500B Slurry Separation Plant for Middle East TBM Project 

Amid the rapaid expansion of ultra-long tunnel, cross-river, and urban underground infrastructure projects worldwide, Tunnel Boring Machine (TBM) tunneling technology has become the core solution for high-efficiency underground construction. As a critical supporting system for slurry shield TBM operations, the newly upgraded intelligent slurry separation plant has broken through traditional technical bottlenecks in slurry purification, solid-liquid separation, and cyclic utilization. By integrating multi-stage precision separation, intelligent frequency conversion control, and modular environmental protection design, the equipment has comprehensively improved the safety, efficiency, and green construction level of TBM tunneling, becoming an indispensable core facility for modern large-scale underground engineering.

GN Separation has been supplying the TBM slurry separation plants to TBM contractors for years. Along with the development of GN mining vibrating screens, the vibrating screens equipped with polyurethane screen panels, GNTBM series slurry separating plants are upgraded to a newer and higher level.

A complete GNTBM slurry separation plant combines 3 steps for separation. Which is also the working principle of a GNTBM Slurry plant.Those three-stage graded separation process, covering coarse, medium and fine solid particle purification to achieve full-gradient slurry treatment.

1.The first stage is primary scalping screening, where a high-efficiency vibrating scalping screen rapidly removes large-particle impurities such as gravel and clay clumps in the raw slurry, effectively protecting downstream precision separation equipment from impact damage and blocking.

2.The second stage is desanding purification, utilizing large-diameter hydrocyclone groups to generate high-strength centrifugal force to separate medium-sized sand particles from the slurry, reducing solid-phase load and improving the uniformity of slurry fluidity.

3. The third stage is deep desilting treatment, through fine cyclone units to capture micron-level fine silt particles, realizing precise purification of circulating slurry and enabling the treated slurry to fully meet TBM cycling standards.

This GNTBM-500 for middle east is one model among GNTBM Slurry Plants, and based on differnet requested slurry capacity, GN has even larger models for option by using bigger or more machine choices. 

GN 22 Inch Decanter Centrifuge for Africa Tank Bottom Oily Sludge Treatment

Industrial waste management has ushered in a new upgrade in oily sludge disposal, as advanced three-phase decanter centrifuge systems, equipped with professional heating units and chemical dosing modules, become the mainstream solution for tank bottom oily sludge treatment in the global petroleum and petrochemical industry.

Tank bottom oily sludge, a complex hazardous waste accumulated during long-term crude oil storage and tank cleaning, features high viscosity, stable oil-water-solid emulsification, and complex component composition, posing great challenges to traditional sedimentation and filtration treatment methods. For this application or similar, GN Separation has a mature solution. The integrated process combining heating conditioning, chemical dosing and decanter centrifugal separation has effectively solved the pain points of low separation efficiency, incomplete resource recovery and secondary pollution in conventional treatment technologies.

1. Decanter Centrifuge. As the core equipment of the whole treatment system, the horizontal decanter centrifuge relies on high-speed centrifugal separation technology to realize precise three-phase separation of oil, water and solid sludge. Different from static gravity separation, the decanter centrifuge generates a powerful centrifugal force hundreds of times greater than gravity through the high-speed rotation of its bowl and screw rotor. Driven by this force, materials are stratified automatically according to density differences: light-phase crude oil floats to the upper layer, middle-layer wastewater is separated independently, and heavy solid sludge is pushed to the discharge outlet by the screw conveyor for automatic discharging. This continuous and automated separation mode greatly improves treatment efficiency and realizes large-scale and stable disposal of tank bottom sludge.

2. Heating Section.To maximize the centrifuge’s separation performance, the supporting heating unit serves as a key pre-treatment link for raw sludge. Tank bottom oily sludge usually presents high viscosity at room temperature, and the dense oil film wraps solid particles, making it difficult to break the emulsified state. The integrated heating unit adopts steam heat exchange or electric constant-temperature heating mode, stably heating the sludge to the optimal temperature range of 60 to 80 degrees Celsius. Moderate heating can significantly reduce the viscosity of oily sludge, enhance the fluidity of mixed materials, and effectively weaken the stable interfacial tension of oil-water emulsions, laying a solid foundation for subsequent fine separation.

3. Chemical Dosing unit. Coordinated with the heating process, the automatic chemical dosing unit further optimizes the sludge conditioning effect. This precision dosing system can quantitatively inject demulsifiers, flocculants and coagulants according to the real-time oil content and viscosity of tank bottom sludge. The added chemical agents can rapidly break the stubborn oil-water-solid emulsified structure, aggregate tiny dispersed solid particles into large flocs, and separate dissolved oil from the water phase. Compared with manual dosing, the automated chemical dosing module ensures accurate reagent ratio, avoids excessive chemical consumption, and reduces treatment costs while improving separation purity.

GN Decanter Centrifuges Revolutionize Starch Separation for Potato Slices Flushing Water Recycling

GN Centrifuge is recently used in a new application in a domestic company in China, which is for separating the waste water after potato slices flushing water in order to recycle the water. 

About GN Separation.

1.A revolutionize solution: As the global potato processing industry scales up production of potato slices, crisps, and frozen potato products, sustainable water treatment and resource recovery have become core priorities for manufacturers worldwide. Traditional potato slice flushing processes generate massive volumes of starchy wastewater rich in fine potato starch particles, soluble proteins, and organic residues. For decades, this wastewater was either discharged after simple treatment or discarded directly, leading to severe resource waste, high water pollution load, and increased operational costs for food factories. Today, the widespread adoption of decanter centrifuges dedicated to potato slices flushing water starch separation is reshaping the environmental and economic efficiency of the potato processing sector, bringing a mature, high-efficiency solution for starch recycling and industrial water reuse.

Potato slice flushing is an indispensable procedure in potato deep processing.

2.About the composition of water: After peeling and slicing, fresh potato slices carry abundant free starch on their surface. High-pressure water flushing is used to remove excess starch to prevent adhesion during frying or freezing and ensure the crisp texture of finished products. The resulting flushing water forms a dilute starch slurry with fine suspended starch particles, which are difficult to separate through traditional sedimentation and filtration methods. Natural sedimentation requires large-scale sedimentation tanks and long processing cycles, while conventional filter devices are prone to clogging by fine starch powder, resulting in low separation efficiency and unstable treatment effects. These technical bottlenecks have long restricted the green upgrading of potato processing enterprises.

3.Role of Decanter centrifuges: as advanced horizontal spiral centrifugal separation equipment, perfectly solve the pain points of potato flushing water treatment through precise centrifugal separation technology. The core working principle relies on high-speed rotational motion to generate powerful centrifugal force. When the starchy flushing water enters the rotating bowl of the decanter centrifuge, solid starch particles with higher density are quickly thrown to the inner wall of the bowl under centrifugal action. The built-in spiral conveyor pushes the concentrated solid starch sediment toward the conical discharge end for automatic discharging, while the purified light-phase water flows out from the liquid outlet. This continuous two-phase separation process realizes one-step efficient separation of starch solids and industrial washing water.

As a professional manufacturer of decanter centrifuges, GN Separation is your ideal choice as a supplier. 

GNLW554 Dewatering Centrifuge Package for Overseas WWTP

Among numerous water treatment equipment, the combination of decanter centrifuge and polymer dosing unit has emerged as a mainstream integrated solution for solid-liquid separation and sludge dewatering in wastewater treatment. GN Separation is a leading brands for manufacturing this combination, and recently just fabricated a GNLW554 Centrifuge matched with a polymer dosing for a waste water treatment plant.

1. The decanter centrifuge lays the core foundation for high-efficiency wastewater purification by virtue of its unique mechanical separation principle. Different from conventional filtration and sedimentation equipment that relies on natural gravity, the horizontal decanter centrifuge generates powerful centrifugal force through high-speed rotation of the drum and screw conveyor. In the closed rotating cavity, solid suspended particles, sludge impurities and other heavy substances in wastewater are rapidly thrown to the drum wall and compacted into solid cake, while clean water converges in the central area and is discharged through the overflow port, realizing continuous and automatic solid-liquid separation .

2.As a supporting core equipment, the polymer dosing unit is the key to optimizing the separation effect of the decanter centrifuge and reducing operational costs. Wastewater contains a large number of tiny colloidal particles and suspended solids with stable dispersion, which are difficult to settle and separate relying solely on centrifugal force. The automatic polymer dosing unit accurately prepares and quantitatively injects polymer flocculant into the wastewater pipeline according to real-time water quality and flow parameters . The polymer molecules adsorb tiny dispersed particles in the water, bridging and aggregating them into large-diameter dense flocs. These formed flocs have higher specific gravity and better settleability, which greatly improves the centrifugal separation efficiency of the decanter centrifuge, avoids fine particle leakage, and significantly enhances the clarity of discharged water . Moreover, the intelligent dosing system realizes precise dosage control, effectively reducing polymer consumption, avoiding chemical waste, and lowering the overall operating cost of wastewater treatment .

GNLS3661 Large Linear Vibrating Screen for Domestic Mining Company

A customized heavy-duty large linear vibrating screen tailored for large-scale mineral processing has been officially commissioned at a core production base of a top-tier domestic mining company in central China, marking a major upgrade of the enterprise’s ore classification, dewatering and impurity removal production lines. Independently developed and manufactured by a professional Chinese mining screening equipment manufacturer, GN Separation, this new-generation linear vibrating screen breaks the bottlenecks of low throughput, high failure rate and high energy consumption of traditional screening equipment, helping domestic mining enterprises accelerate intelligent, green and high-efficiency mineral processing transformation amid China’s dual-carbon goals and mining industry standardization upgrading.

1.Background:Benefiting from booming domestic demand for iron ore, copper ore, coal gangue and aggregate raw materials, China’s inland mining bases have expanded annual ore processing capacity year by year in recent years. However, most conventional circular vibrating screens and small-size linear screening devices cannot adapt to 24-hour continuous heavy-load operation under harsh mining working conditions, including high dust, high humidity and strong material abrasion.

2. Advantages of GNLS3661 and other similar models: Pain points such as uneven particle grading, frequent screen mesh blockage, short equipment service life and high daily maintenance costs have long restricted the production efficiency and profit margin of medium and large domestic mining groups. Targeted at the on-site working parameters and process flow of the cooperating mining enterprise, the R&D team optimized the overall mechanical structure, vibration system and intelligent control module to launch this industrial-grade large linear vibrating screen specially for domestic open-pit and underground mineral processing scenarios.

3.Some other features: This flagship large linear vibrating screen adopts an integrated welding-free riveting structure made of high-strength manganese alloy steel plate, eliminating welding residual stress and enhancing overall structural impact resistance. Different from ordinary screening equipment, it is equipped with dual box-type synchronous vibration exciters and high-elasticity rubber damping springs, realizing stable linear vibration trajectory with adjustable vibration frequency and screen deck inclination angle.