Uncategorized – Desander Desilter

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

Across Africa’s oil storage terminals and refineries, tank bottom oily sludge has long become a tough operational and environmental headache. Crude sediment accumulates at tank bottoms year-round, reducing storage capacity, corroding tank walls, and creating hazardous waste that violates local environmental regulations from Nigeria to Ghana and South Africa. Conventional gravity settling and manual cleaning deliver low oil recovery, high labor costs and large residual waste volume. Today, the GNLW554-VFD large-bowl variable-frequency drive decanter centrifuge stands out as a reliable, cost-effective separation equipment tailored to African oilfield sludge treatment demands.

As GN Separation’s flagship 22-inch (550mm bowl diameter) continuous decanter model, the GNLW554-VFD is engineered for 24/7 heavy-duty operation under Africa’s high-temperature, dusty field conditions. Its core advantage lies in the full VFD independent control system, which allows on-site operators to adjust bowl rotating speed and differential scroll speed in real time. Tank bottom sludge varies drastically in viscosity, solid content and oil proportion due to different crude sources; the flexible VFD setup optimizes centrifugal G-force and conveying torque to maintain consistent separation efficiency regardless of fluctuating feed materials.

The working flow fits perfectly into standard African sludge treatment lines. After heating, dilution and polymer conditioning, tank sludge enters the rotating bowl. Powerful centrifugal force quickly stratifies oil, water and heavy solids. The wear-resistant spiral conveyor continuously discharges dry sludge cake, while clarified oil and water flow out through separate outlets. Recovered crude can be recycled back to storage tanks, cutting raw material loss; dewatered solid waste volume shrinks by over 60%, slashing transportation and landfill fees for African operators.

Built with tungsten carbide protection on scroll flights and discharge ports, this centrifuge resists abrasion from gritty tank sediment, extending service life and lowering frequent maintenance costs—a critical merit for remote African sites with limited component supply. Unlike outdated fixed-speed centrifuges, its VFD design also cuts idle power consumption by nearly 20%, easing pressure on unstable local power grids common in many African oil regions.

For African energy enterprises balancing resource recovery, waste reduction and environmental compliance, the GNLW554-VFD decanter centrifuge delivers dual gains: maximized oil recycling revenue and simplified hazardous waste compliance. As more oil facilities adopt mechanical centrifugal separation instead of inefficient traditional methods, this large VFD decanter will remain a core equipment to advance sustainable tank bottom sludge management across Africa’s petroleum industry.

GN Vacuum Degasser and Shale Shakers for Middle East Client

GN Solids Control recently supplied a set of solids control equipment, including a vacuum degasser and shale shakers, for a valued client in the Middle East. The equipment will be used in an oilfield drilling fluid treatment system to help improve mud performance, reduce drilling risks, and ensure stable operation under demanding site conditions.

In drilling operations, drilling fluid plays a critical role in carrying cuttings, cooling the drill bit, maintaining wellbore stability, and controlling formation pressure. However, when drilling fluid returns from the wellbore, it often contains drilled solids, gas, and other unwanted contaminants. If these are not removed efficiently, they may affect mud properties, reduce drilling efficiency, and increase operating costs. Therefore, reliable solids control equipment is essential for modern drilling projects.

The shale shaker is the first-stage solids control equipment in a drilling mud system. GN shale shakers are designed to remove large drilled cuttings from the returned mud before the fluid enters downstream equipment. With high vibration strength, durable screen panels, and a robust structure, GN shale shakers provide efficient separation performance and stable operation. The equipment is suitable for harsh drilling environments and can help reduce the load on subsequent solids control equipment.

For this Middle East project, GN shale shakers are built with a heavy-duty frame, reliable vibration motors, and user-friendly operation features. The shaker deck angle can be adjusted according to site conditions, helping operators achieve better balance between solids discharge and liquid recovery. GN composite frame shaker screens are also available to support longer screen life and lower maintenance cost.

In addition to shale shakers, GN supplied a vacuum degasser for the client’s drilling mud system. The vacuum degasser is mainly used to remove entrained gas from gas-cut drilling fluid. If gas remains in the mud, it may cause mud density fluctuation, pump cavitation, inaccurate mud weight measurement, and potential safety risks. By removing gas effectively, the vacuum degasser helps restore mud density and improves the performance of the entire circulation system.

GN vacuum degasser adopts a self-suction design and does not require an additional feeding pump in many standard applications. The drilling fluid is drawn into the degassing chamber under vacuum, where gas is separated from the liquid phase and discharged safely. The treated mud then returns to the active mud system for reuse. This design helps simplify system layout and reduce energy consumption.

The Middle East oil and gas market has strict requirements for equipment reliability, safety, and environmental performance. GN solids control equipment is widely used in oilfield drilling, workover, trenchless drilling, and waste mud treatment projects. With rich manufacturing experience and international project references, GN is able to provide customized solids control solutions according to different drilling conditions, mud properties, and client requirements.

The successful supply of GN vacuum degasser and shale shakers to this Middle East client once again demonstrates GN’s capability in providing practical, reliable, and cost-effective drilling fluid treatment equipment. GN will continue to support global drilling contractors and oilfield service companies with high-quality solids control equipment and professional technical service.

Hydraulic Drive Mud Centrifuge and Cuttings Dryer for Asia Client

As Asia’s oil and gas, geothermal, and drilling industries continue to expand, the demand for reliable, high-efficiency solids control and waste management equipment has grown rapidly. To meet regional operational challenges and strict environmental regulations, GN Solids Control has delivered customized hydraulic drive mud centrifuges and cuttings dryers for multiple Asian clients, delivering stable performance, cost savings, and eco-friendly drilling solutions.

Different from traditional electrically driven models, GN’s full hydraulic drive decanter centrifuge adopts advanced Swiss VISCOTHERM hydraulic technology, featuring stable power output and strong anti-interference capability. It perfectly adapts to Asia’s complex working conditions, including high-temperature environments up to 55℃, unstable voltage supply, and heavy mud processing scenarios. Equipped with premium SKF and FAG bearings as well as tungsten carbide wear-resistant components, the equipment effectively resists dust and impact wear, greatly extending service life and reducing frequent maintenance downtime.

The supporting GN cuttings dryer further optimizes the entire drilling waste treatment process. Working in tandem with the hydraulic centrifuge, it minimizes oil-on-cuttings (OOC) residues, enabling treated cuttings to meet local Asian environmental discharge standards. The integrated system efficiently recycles reusable drilling mud, drastically cutting fresh mud procurement costs and waste transportation expenses for onshore and offshore drilling projects.

Safety and operational flexibility are core advantages favored by Asian clients. The three-layer overload protection system covering gearbox, hydraulic coupler and electric control panel ensures zero-risk continuous operation. The compact skid-mounted design allows quick installation and flexible mobility, suitable for mountainous, desert and offshore drilling sites across Southeast Asia, Middle East Asia and other regional areas.

With tailored design for Asia’s climate, site conditions and environmental policies, GN’s hydraulic drive mud treatment system has become a cost-effective and sustainable choice for local drilling enterprises. Moving forward, GN Solids Control will continue to provide high-quality equipment and localized after-sales support to empower more Asian clients with efficient, safe and green drilling operations.

POTATO SLICES FLUSHING WATER STARCH SEPARATION CENTRIFUGE FOR DOMESTIC FOOD PLANT

In potato processing plants, slice washing generates significant volumes of wastewater containing suspended starch solids. Discharging this water without treatment wastes both a recoverable byproduct and a valuable water resource. A recent GN shipment successfully brought a solution to this issue by using decanter centrifuge.

GN supplied a decanter centrifuge sized for the facility’s throughput. The unit operates on the counter-current principle, with the bowl and screw conveyor rotating at differential speeds controlled by a variable frequency drive(VFD). This arrangement allows the separation parameters to be adjusted as the feed characteristics vary with production rates. The bowl length-to-diameter ratio, exceeding 3.0, provides sufficient residence time for fine starch particles to settle out of suspension.

Several design features make this installation practical for food processing duty. The bowl cylindrical and conical sections are manufactured from Duplex Stainless Steel 2304, with other wetted parts in SS304—materials selected for corrosion resistance and cleanability. Tungsten carbide tiles protect the screw conveyor at wear points, extending service intervals. The PLC-controlled VFD cabinet provides consistent operation with minimal operator attention.

This installation illustrates a broader capability: GN supplies decanter centrifuges for starch recovery from potato, wheat, corn, and root crop processing, with models available for different capacity ranges. For this customer, the result is reduced water consumption, recovered product value, and a separation process that runs with minimal supervision.

Potato slices flushing water starch separation centrifuge for domestic food plant

For potato chip, French fry and potato snack manufacturers, excess surface starch on cut potato slices has long been a production headache. Unremoved starch leads to sticky slices, uneven frying, dark finished products, wasted raw materials and heavy water pollution. Today, domestic potato slices flushing water starch separation centrifuges have become core equipment for small and medium-sized food factories, solving starch washing and recovery bottlenecks efficiently and affordably.

This integrated centrifuge combines continuous slice flushing and centrifugal starch separation into one streamlined unit, perfectly matching domestic food plants’ medium-scale production lines. Its working logic is straightforward. After potatoes are sliced, raw slices enter the water flushing tank to strip free starch off surfaces. The starch-laden wastewater flows into the centrifuge chamber, while clean potato slices are automatically conveyed to blanching or frying stations. Inside the stainless steel rotating bowl, high centrifugal force rapidly separates fine starch particles from washing water. Concentrated starch slurry is collected for drying and secondary sales, and clarified water circulates back to the flushing tank for repeated use.

Compared with traditional manual soaking and static sedimentation tanks, this domestic centrifuge brings three decisive advantages.

First, outstanding separation efficiency. It removes over 92% surface starch from potato slices within seconds, eliminating sticking and discoloration during frying, greatly upgrading snack texture and appearance.

Second, remarkable cost and resource savings. Recovered potato starch creates extra revenue for factories, while water recycling cuts fresh water consumption by up to 85% and lowers wastewater treatment fees. Third, food-grade durable design. All parts touching materials adopt 304 stainless steel, complying with national food safety standards. The compact structure occupies limited workshop space, with low noise and energy consumption, ideal for domestic small food processing workshops.

Sustainability is another highlight of this equipment. Direct discharge of starchy wastewater triggers eutrophication and environmental penalties. The centrifuge traps nearly all starch waste, reducing organic pollutant emissions sharply. Its fully enclosed running structure also avoids slice oxidation, preserving the natural pale color of potato products without extra chemical additives.

For domestic food plant operators pursuing stable output, product quality and green production, investing in a potato slices flushing water starch separation centrifuge delivers long-term return. It simplifies potato processing workflows, reduces labor reliance, turns waste starch into valuable byproducts, and helps factories meet stricter food and environmental regulations. As the potato snack market expands, this cost-effective separation machine will remain an irreplaceable piece of core processing equipment for local food manufacturers.

2600BBL! GN Complete Rig Solids Control System to Kuwait

GN Solids Control has secured another complete mud circulation system package order for Kuwait, marking another milestone in the brand’s long-term cooperation with Middle Eastern oil operators. Covering standalone solids control equipment to full integrated mud treatment packages, this new contract further proves global clients’ recognition of GN’s reliable engineering and turnkey service capacity.

As an officially listed solids control supplier of Kuwait Oil Company (KOC), GN stands out among numerous equipment manufacturers by delivering full-process, customized drilling mud management solutions that fully match KOC’s strict procurement and operation standards. KOC maintains rigorous thresholds for vendor access, and GN’s stable product performance, complete technical documentation and after-sales support have helped it maintain long-term qualified supplier status, gaining priority bidding opportunities for local drilling projects year after year.

The full-set mud circulation system under this contract boasts a complete five-stage solids control configuration without functional gaps. The integrated unit assembles core processing equipment including shale shaker, hydrocyclone desander, hydrocyclone desilter, vacuum degasser and decanter centrifuge. Each component undertakes targeted particle separation tasks: the shale shaker removes large drilling cuttings at the first stage, while desanders and desilters strip medium and fine silt particles. The vacuum degasser eliminates harmful gas mixed in drilling fluid, and the decanter centrifuge separates ultrafine solids to stabilize mud density and viscosity. Such full configuration guarantees continuous, high-efficiency mud recycling and greatly cuts waste mud discharge and raw material costs for drilling teams.

Safety design is the core highlight tailored for Kuwait’s harsh desert oilfield conditions. The whole set of electrical control systems passes authoritative ATEX explosion-proof certification, complying with European standards for equipment operating in flammable and explosive atmospheres. Kuwait oilfields feature extreme high temperature, heavy dust and frequent volatile combustible gas, which imposes tough requirements on electrical safety. ATEX-certified control panels effectively avoid electric sparks triggering safety accidents, fully meeting local HSE management rules of Middle East oilfields.

GN’s service spectrum stretches widely from individual tank-top solids control units to full system EPC general contracting. Instead of merely selling single machinery, the brand provides one-stop support covering scheme design, manufacturing, factory testing, overseas delivery, on-site installation and after-sales maintenance. With robust R&D strength and mature large-scale project execution experience, GN keeps empowering global oil and gas extraction operations to run with higher efficiency and stronger safety guarantees, and will continue expanding its footprint across the Middle East and international energy markets in the future.

GNLW554 DEWATERING CENTRIFUGE PACKAGE FOR OVERSEAS WWTP

GN SOLIDS CONTROL has long been recognized for its decanter centrifuge products, serving drilling contractors and mud service companies worldwide with solutions ranging from 9 inch to 22 inch bowl diameters. Recently a successful shipment for our GNLW554 model decanter centrifuge package to our foreign clients also proved GN’s position in providing the best result for drilling fluids cleaning.

The GNLW554 decanter centrifuge features a bowl diameter of 550 mm and an effective bowl length of 1800 mm, yielding a length to diameter (L/D) ratio of 3.2. This geometric proportion is critical: an elevated L/D ratio provides an extended settling zone, increasing residence time and enhancing the capture efficiency of fine and ultra-fine particulates. At the core of the GNLW554’s durability lies a bowl assembly engineered with materials selected for both mechanical strength and corrosion resistance. The cylindrical and conical sections are fabricated from Duplex Stainless Steel 2304 via centrifugal casting—a process that yields a dense, homogeneous microstructure with superior resistance to chloride-induced stress corrosion cracking, a common failure mode in wastewater environments containing aggressive chemical agents.

Since in wastewater treatment applications, polymeric reagents promote agglomeration of fine suspended particles into larger, denser flocs amenable to centrifugal settling. Therefore GN recommends a polymer dosing unit to be accompanion with decanter centrifuge. A polymer dosing unit which also included in this shipment will show highly immportance to maintain the efficiency of the whole cleaning process. This integration enables closed-loop regulation of polymer concentration in response to real-time feed solids loading, ensuring that chemical consumption is continuously matched to process demand.

Through its growing presence in overseas projects attests to the reliability and adaptability that GN SOLIDS CONTROL embeds in every rotating assembly, providing plant operators with a trusted workhorse for the most demanding dewatering challenges.

High-End Trenchless Mud Purification System Exported to Europe

For businesses serving high-end clients in drilling, construction, and underground engineering, mud purification is never a routine task—it demands reliability, precision, and adaptability. Our advanced mud cleaning system rises to this challenge with a superior design that combines top-tier configuration, ultra-flexible mobility, and intelligent control, making it the ideal solution for demanding on-site operations.

At the core of our equipment lies a high-performance configuration engineered specifically to meet the strict mud purification needs of high-end customers. Every component, from the screening system to the power unit, is selected for durability and efficiency, ensuring stable operation even under heavy workloads. The system delivers thorough separation, high purification accuracy, and consistent output, perfectly aligning with the high standards of premium projects.

Mobility is another key advantage. Each module of the machine supports quick assembly and disassembly, allowing for fast installation, dismantling, and transportation. Whether moving between construction sites, switching working areas, or responding to emergency tasks, the equipment can be rapidly relocated and put into use. This modular design greatly improves operational efficiency and reduces downtime, supporting flexible mobile operations.

To enhance durability and intelligence, the equipment features a stainless steel control cabinet that resists corrosion, moisture, and harsh on-site environments, ensuring long service life and stable performance. Clients can also choose an intelligent control system for automated operation, real-time monitoring, and one-key adjustment. The smart upgrade simplifies operation, improves safety, and helps users achieve more precise and efficient mud management.

In summary, our mud cleaning equipment integrates high-end configuration, fast-disassembling modular design, and reliable intelligent control. It not only satisfies the strict purification demands of high-end customers but also adapts to diverse mobile working scenarios. For projects that require quality, efficiency, and flexibility, this is the trusted choice.

THE API DIFFERENCE: WHY GN’S SHAKER SCREENS LEAD IN PERFORMANCE

GN SOLIDS CONTROL is well-known for its unique shale shaker design, but as the core part of a shale shaker, the shaker screen is also a non-negligible advantage that GN have.

GN SOLIDS CONTROL has held a unique position in China as the sole manufacturer of API-certified shaker screens (API RP 13C / ISO 13501) until 2022. This certification is not merely a label; it is a binding guarantee of three critical metrics: exact cut point (D100), conductance (kD/mm), and non-blanked open area. Without API certification, “mesh count” can be misleading since the usage of rectangular grids and multiple layers of screens.

Beyond API certification, GN utilizes a patented polyurethane bonding system between the screen and the screen basket. Comparing with conventional screens which rely on foam or rubber seals that degrade under pressure and hydrocarbon exposure, polyurethane provides superior abrasion resistance, chemical compatibility, and dimensional stability, eliminating by-pass of solids and extending service life.

Since different application scenarios entail distinct parameter requirements from clients for shaker screens, GN’s shale screen design covers all major international form factors, manufactured under the same API-certified process, including hook strip flat screen, steel frame screen, pretension frame screen, wave screen, hook strip soft screen, etc.

From API-confirmed cut points to a polyurethane sealing patent and full size-range availability, GN delivers reliability that is documented. For more details or quotation needs, please contact GN SOLIDS CONTROL.

GN 14 INCH SLUDGE DEWATERING CENTRIFUGE PACKAGE FOR SOUTHEAST ASIA CLIENT

GN SOLIDS CONTROL is pleased to announce the successful delivery of a 14 inch sludge dewatering centrifuge package to clients in Southeastern Asia. This package including a 14 inch sludge dewatering centrifuge with a 1000L chemical dosing unit.

Designed specifically for removing liquid from solid phase materials, the GN SOLIDS CONTROL 14 inch sludge dewatering centrifuge can prove a high density difference of solid and liquid with low viscosity by its extraordinary 8.5 degree beach angle. This design delivers drier solids, clearer discharge, and lower operating costs. For sludge dewatering applications—from municipal to industrial—the 14-inch centrifuge strikes an ideal balance between compact footprint and high performance.
In order to ensure there will be a stable and efficient centrifuge condition, the GN SOLIDS CONTROL 14 inch sludge dewatering centrifuge is adopting 2 phase stainless SUS2205 steel to wild its bowl and helical shaft, all main parts will experience dynamic balancing test for 3 times after it was manufactured in case the stability won’t be compromised.
Another highlight of the 14 inch sludge dewatering centrifuge package is the 1000L chemical dosing unit. Engineered for accompanying with dewatering centrifuge, the 1000L polymer dosing unit was designed to providing accurate chemically enhanced flocculation of colloidal and ultra-fine drilled solids during the whole centrifuging process.

Through this shipment to our client in Southeastern Asia, it definitely reinforces GN SOLIDS CONTROL’s position as a trusted partner for centrifuge field worldwide.