Category: dewatering unit

GN Engineering Mud Dewatering Centrifuge for Overseas Customer

GN Solids Control offers highly versatile dewatering decanter centrifuges, which are essential for wastewater treatment across various industries, including oil rigs, trenchless construction, and industrial applications.

These centrifuges are designed with multiple drum size options, ranging from 9-inch to 30-inch, catering to a wide range of project requirements. The length of the centrifuge bowl and the specific design are customized based on the characteristics of the materials being processed and the unique operational needs of each project.

To ensure optimal performance, GN Solids Control’s engineers thoroughly assess project details by sending out questionnaires to clients. This allows them to understand the specific needs and conditions of the project, enabling the provision of tailored recommendations for centrifuge model selection. Whether the project involves oilfield waste treatment, trenchless technology applications, or industrial wastewater, GN Solids Control ensures the right centrifuge is chosen for maximum efficiency and performance.

In addition to the decanter centrifuges, GN Solids Control also provides chemical dosing units to complement the dewatering process. One of the key offerings is the three-tank automatic dosing system. This system is equipped with high-quality stainless-steel tanks and a fully automated electrical control system. It is designed for the automatic mixing and dosing of chemicals, making it ideal for powdered chemicals. The fully automated system ensures consistent and accurate dosing, which is essential for achieving optimal dewatering results.

For applications that require the dosing of liquid chemicals, GN Solids Control also offers a PE bucket manual dosing system. This system is particularly suited for projects where manual control is preferred, providing flexibility in chemical dosing for a variety of operational scenarios.

By providing both automatic and manual dosing options, along with customizable centrifuge solutions, GN Solids Control ensures that clients receive the most effective equipment for their specific wastewater treatment needs. The company’s focus on tailored solutions and high-quality equipment makes it a trusted partner in industries requiring advanced dewatering and waste management technologies.

Contaminated Soil and Oil-Based Mud Cutting Treatment Systems

GN Solids Control is a leading name in the design and manufacturing of oil – based mud (OBM) cutting treatment systems. GN can send our engineers for the first – time installation and commissioning to ensure a smooth start – up for our clients.​

Key Separation Equipment​
Vertical Cuttings Dryer​
The vertical cuttings dryer is the star of our OBM cuttings treatment lineup. It is the primary separation equipment for OBM cuttings treatment and is highly efficient. With this advanced technology, it can reduce the Oil on Cuttings (OOC) to an impressively low range of 3 – 5%. This significant reduction not only helps in waste management but also has cost – saving implications for the oil and gas industry.​
High G Drying Shaker​
While the high G drying shaker is mainly designed for water – base mud cuttings, some clients have also used it for OBM cuttings. However, it has its limitations. It can only reduce the OOC to around 10%. This makes it clear that for optimal OBM cuttings treatment, the vertical cuttings dryer is the better choice.​


High – Speed Centrifuge​
High – speed centrifuge plays a crucial role in the treatment process. It is used after the vertical cuttings dryer. Its function is to reduce the mud weight and make the mud qualified for reuse. By recycling the mud, we not only save resources but also contribute to a more sustainable drilling operation.​
Treatment Locations​
It understand that every client has different operational setups. Some may choose to treat the cuttings at the rig site, while others prefer to collect the cuttings and treat them in their yards. To better serve clients, GN Solids Control will send a question list on waste management in investigate the project information and demands. This will enable GN to offer clients more tailored and proper solutions.​

GN Solids Control Solutions​
Solution 1: Vertical Cuttings Dryer and High – Speed Centrifuge Package​
This package is an excellent choice for treating fresh OBM cuttings at the rig site. It is relatively easy to implement and highly effective. With this solution, our system can reduce the OOC to the 3 – 5% range, ensuring efficient waste reduction right at the source.​


Solution 2: Oily Sludge Separation System for Old Oily Sludge in Waste Pits​
For the old oily sludge in waste pits, we offer the oily sludge separation system. We have a successful project reference in Qatar that showcases the effectiveness of this solution.
In this project, the results were remarkable:​
Oil on Solids: 1 – 3%​
Water in Oil: 3 – 5% (BS&W)​
Oil in Water: 1%​

GN Solids Control OBM cuttings system is a waste – reducing system that can be used before TDU (Thermal Desorption Unit) to improve TDU efficiency.

GN Containerized Sludge Dewatering Package for Soil Remediation in Middle East

GN Solids Control recently developed a Containerized Sludge Dewatering System for a Middle East project, designed specifically for contaminated soil treatment and cleaning. This innovative system is fully integrated into a 40-foot fabricated container, ensuring easy transportation and quick on-site installation. All components are pre-assembled and connected in the container, minimizing the time and effort required for installation at the project site.

The system includes the following key equipment:

High-Speed Big Bowl Decanter Centrifuge (GNLW654-VFD): This centrifuge is designed for efficient dewatering of sludge. It is equipped with a Variable Frequency Drive (VFD), allowing precise control of the centrifuge’s speed to optimize solids separation and ensure high performance in the dewatering process.

Feeding Pump (GNG30-075C): The system uses a 7.5kW screw pump, which is typically used to feed a 14-inch centrifuge. However, since the dewatering treatment capacity is much smaller compared to mud treatment, this smaller pump is a more suitable fit for the system, providing the necessary flow rate for the sludge dewatering process.

Polymer Dosing Pump (GNG05-030C): A screw pump is used as the polymer dosing pump. This pump is responsible for adding the appropriate amount of polymer to the sludge, which aids in the coagulation and flocculation processes, allowing for more efficient solid-liquid separation during dewatering.

Slag Screw Conveyor (GNSC10B-7.5M): A screw conveyor is used to transfer the separated sludge (slag) from the centrifuge to the designated disposal or storage area, ensuring continuous operation without manual intervention.

The entire system is housed in a 40-foot container, which provides a compact and mobile solution for on-site sludge dewatering. The containerized design ensures that the equipment is easily transportable, and the pre-connected system significantly reduces installation time at the project site. This approach provides a turnkey solution for contaminated soil treatment and cleaning, offering a streamlined process and efficient operation.

This containerized sludge dewatering system from GN Solids Control is an ideal solution for projects requiring reliable, high-performance dewatering equipment in a compact and easily deployable format.

3 Sets GNTBM-360 Slurry Separation Plant for Overseas Pipe Jacking Project

Pipe jacking is a non-excavation construction technique used to cross sensitive areas such as roads, rivers, and buildings. During the construction process, lubricating slurry (bentonite-based or polymer-based) is injected to reduce friction, which generates wastewater containing solid particles. The solid content in the waste water typically ranges from 5% to 30%, depending on geological conditions such as clay, sand, gravel, or rock layers. The particle size can vary from fine clay particles to gravel larger than 50mm, and in complex geological conditions, large rock pieces may also be present. This waste water needs to be treated to minimize environmental impact.

Given the characteristics of the wastewater, a staged treatment process is required. The typical treatment flow includes: coarse screening shale shaker separation, further solid-liquid separation, and fine filtration/ centrifuge dewatering system which are optional based on the environmental regulations of each country.

Recently, GN Solids Control completed three GNTBM-360 Slurry Separation Plants for an overseas pipe jacking project. These three systems were designed specifically for the same client. The systems include a coarse screening shale shaker system and two-stage solid-liquid separation using desanders and desilter hydrau cyclones. In countries where wastewater discharge is not allowed, additional options like flocculation and dewatering centrifuge systems can be added to meet the regulatory requirements.
Horizontal slurry pumps were used to feed the desander and desilter hydrau cyclones.

The GNTBM-360 Slurry Separation Plant is designed to efficiently treat wastewater generated during pipe jacking operations. The system ensures the effective separation of solid particles from the slurry, allowing for the recycling of the treated water and minimizing the environmental impact of the project. By using advanced equipment such as desanders, desilters, and optional centrifuge systems, the system delivers reliable, high-performance waste treatment solutions for pipe jacking projects.

This tailored slurry separation system from GN Solids Control is an essential solution for ensuring environmental compliance and sustainability in sensitive construction projects that involve slurry-based operations.

GN Oil Sludge Treatment Centrifuge Unit for South America Client

GN Solids Control has recently developed a compact design oily slurry separation system for a project in South America. This system is specifically designed to offer easy movement and efficient layout, with separate skids for each modular component. The system consists of three primary modules, each tailored to meet the specific needs of the project:

Oily Slurry Transfer Module: This module handles the transfer of oily slurry, ensuring the smooth and efficient transportation of materials to the next stages of treatment.

Tank Cleaning Waste Water Treatment System: This module is a combination of a chemical dosing system, a separation system, and an inclined clarifier separation system. It is designed to treat waste water generated from tank cleaning operations by effectively separating contaminants and ensuring that the water can be safely disposed of or reused.

3-Phase Decanter Centrifuge System: This module features a decanter centrifuge system with a mud tank, screw feeding pump, and all necessary connection pipelines. The 3-phase decanter centrifuge efficiently separates the waste slurry into three phases: solids, liquids, and oil, making it ideal for drilling waste management and oily waste treatment.

The compact design of this oily slurry separation system allows for easy transportation and installation, making it a practical solution for projects in remote or space-constrained areas. The separate skids ensure flexibility in layout and ease of maintenance, while the modular design allows for the system to be customized according to the specific needs of each project.

GN Solids Control is a leading manufacturer of full-package drilling mud solids control equipment, drilling waste management equipment, and wastewater treatment systems. The company is committed to providing innovative, high-quality solutions for the oil and gas industry, ensuring operational efficiency and minimizing environmental impact. With a focus on customer satisfaction, GN Solids Control continues to be a trusted partner for businesses around the world.

22inch big bowl decanter centrifuges unit for Oil Sludge Treatment Company

A set of oily sludge separation equipment has been completed for a middle east client, designed to treat the oily slurry generated from contaminated soil treatment and oily sludge separation systems. The client faces a challenge in reducing the solid content of the material, which the centrifuge can process, to below 10%, with solid particles smaller than 2 millimeters. Currently, they aim to achieve this without using dilution.

The desilter mud cleaner used in the system is capable of separating particles as small as 30 micrometers. If all particles larger than 30 micrometers are successfully separated, the solid content can be reduced to a certain level, but further steps are necessary to achieve the desired result. Following flocculation, the minimum solid content that can be achieved by using the 4 inch cyclone for separation will depend on the efficiency of the process, as flocculation helps to aggregate fine solids, making them easier to separate.

An important consideration is the oil content in the liquid phase. If the oil content is too low, the three-phase decanter centrifuge becomes ineffective at separating the oil, making it unsuitable for the task. In such cases, only a two-phase centrifuge will be effective.

The equipment setup also includes a desilter mud cleaner, which serves as a pre-separation stage to remove the majority of the solids, reducing the weight of the slurry before it moves into the next treatment stages. After this, two sets of high-speed centrifuges (22-inch big bowl centrifuges) are used in tandem for ultra-fine solids separation. The two centrifuges can process the slurry together to achieve better separation of the fine solids.

Additionally, the system is equipped with a chemical dosing unit that allows the client to treat the slurry in two stages: the first set of centrifuges for fine solids separation and the second set for dewatering treatment. After the centrifuge treatment, an oil-water separator is employed to separate the oil and water phases, completing the treatment process. This setup is designed to provide efficient oily sludge separation while addressing the specific challenges of the middle east client’s materials.

3-phase decanter centrifuge and oil water separator for oil sludge treatment

GN Solids Control is capable to offer complete packages for oily sludge separation, designed to efficiently process and treat contaminated sludge. The core equipment in the system includes shale shakers and decanter centrifuges, which play a vital role in the separation of solids from the liquid phase. GN Solids Control manufactures both 2-phase and 3-phase decanter centrifuges, each suited for different stages of the separation process.

The 2-phase decanter centrifuge is typically used to separate solids from the liquid phase, resulting in two distinct phases: a solid phase and a liquid phase, which typically consists of water and oil. The 2-phase centrifuge is particularly effective in handling high volumes of oily sludge, where the separation of fine solids from the liquid is required. In cases where a more precise separation of oil and water is necessary, GN Solids Control provides a 3-phase decanter centrifuge. The 3-phase centrifuge is designed to simultaneously separate solids, oil, and water into three distinct phases, improving efficiency in applications where both oil and water recovery are critical.

In addition to the decanter centrifuges, GN Solids Control offers an oil-water separator, which can be used following the 2-phase centrifuge separation. The oil-water separator is an effective solution for further separating the oil and water phases, ensuring a cleaner and more purified liquid phase. This equipment is particularly useful when the oil content in the liquid phase is too low for the 3-phase centrifuge to operate effectively, allowing for a more tailored approach to the separation process.

Together, these components form a comprehensive oily sludge separation system that can be customized to meet the specific needs of the client. GN Solids Control’s equipment is designed to optimize the separation process, improve recovery rates, and ensure the treatment of oily sludge is carried out efficiently and effectively. Whether using a 2-phase or 3-phase decanter centrifuge, or utilizing an oil-water separator for additional separation, GN Solids Control provides robust and reliable solutions for oily sludge treatment.

How to choose the flush pump for decanter centrifuge?

When it comes to choosing a flush pump for a decanter centrifuge, numerous users often have the same question: Can the existing sludge feeding pump double as a flushing pump? Specifically, many consider the idea of adding a water line to the suction area of the current feed pump for this purpose. The proposed process entails closing the sludge valve and opening the water valve to initiate the flushing action. Nevertheless, grasping the correct configuration is crucial to guarantee top-notch performance.

GN Solids Control suggests employing the centrifuge’s feeding screw pump as the flush pump. This recommendation offers both economic advantages and operational efficiency. To put it into practice, a T-piece needs to be inserted into the suction pipe of the feeding pump and then connected to a dedicated water line. Through separate valves, operators can control the water line and the slurry feeding pipe independently, enabling seamless transitions between the feeding and flushing modes.

By leveraging the feeding screw pump for flushing, operators can enjoy dual functionality, eliminating the necessity for an additional, stand-alone flush pump. This setup streamlines the overall system and brings an extra perk: the water line can effectively flush and cleanse the settled solids within both the screw pump and the feeding pipelines. As a result, the entire system stays clean, averting blockages and ensuring the decanter centrifuge operates continuously and efficiently.

In general, if the aforementioned setup is properly implemented, a separate flushing pump usually isn’t required. However, in cases where unique operational circumstances demand more flushing power or a particular pump configuration, considering a separate flushing pump could be a viable option, like screw pump, centrigugal pump, surry pump, etc…

To sum it up, GN Solids Control’s recommended practice of using the feeding screw pump for flushing represents an effective solution. It boosts system efficiency, cuts down on equipment requirements, and keeps the centrifuge in prime working condition. This approach mirrors GN Solids Control’s dedication to supplying high-quality, cost-effective solutions for solids control and waste management across diverse industries.

2-phase and 3-phase centrifuge for oil sludge separation

The final step in the oily sludge separation process involves a crucial three-phase separation to oil, water and solids, and there are two primary options available for achieving optimal results, as recommended from the Separation specialist – GN Solids Control.

Option 1: GN Solids Control Two-Phase Decanter Centrifuge + Three-Phase Disc Centrifuge

This option employs a combination of two-phase decanter centrifuge followed by a three-phase disc centrifuge for fine separation. The decanter centrifuge is initially used to separate the bulk solids and liquids, while the disc centrifuge performs the critical three-phase separation, separating oil, water, and solids with high efficiency.

The disc centrifuge offers a significant advantage by achieving cleaner outputs for both oil and water. It is particularly effective in reducing the Base Sediment & Water (BS&W) content in the oil. BS&W is a key parameter in defining the quality of the oil, and the lower the BS&W, the higher the oil quality. With the disc centrifuge, the output oil typically has a BS&W of 2-3%, ensuring higher purity and quality.

The water output from the disc centrifuge ranges from 1000 to 3000 RPM, depending on the specific settings and operational conditions, ensuring that the water is effectively separated from the oil. Additionally, the solids content in the output oil from the disc centrifuge is typically between 1-3%, maintaining the quality and clarity of the oil while efficiently removing contaminants.

Option 2: Three-Phase Decanter Centrifuge

The second option utilizes a single three-phase decanter centrifuge for all three-phase separation. This centrifuge directly separates the oil, water, and solids in one step. It is a simpler, more compact solution, which may be ideal for certain operational setups where space or equipment complexity is a concern.

The three-phase decanter centrifuge is effective in producing the three separate outputs—oil, water, and solids—though the quality of separation may not be as refined as with the combination of a decanter centrifuge and disc centrifuge. This option is suitable for applications where a balance of performance and operational simplicity is desired, but it may not achieve the same level of oil purity as the multi-stage separation process.

Each option offers distinct advantages, and the choice between them depends on factors such as the desired oil quality, operational conditions, and system requirements. Operators can contact GN Solids Control engieers to ask for more suitable solution.

2024 Bauma China – GN exhibit separation equipment

Bauma CHINA 2024 was held at Shanghai New International Expo Center from Nov. 26th to 29th. It’s a key event in the global construction machinery industry. This year, it gathered over 3,400 exhibitors from 32 countries and regions and attracted more than 200,000 visitors from over 130 countries and regions.

Domestic and international leading enterprises like XCMG, SANY Group, Zoomlion, Shandong Lingong, GN Separation (GN Solids Control), Caterpillar, Wirtgen, Manitou, etc. participated. German, Italian, and Turkish national pavilions also made a grand appearance.

GN Separation is a branch brand of GN Solids Control. At the exhibition, GN showcased a wide range of separation equipment. This included mining vibration shaker screens, tailings dewatering centrifuge, mud recovery system, solid vacuum pump.

The mining vibration shaker screens play a crucial role in the mining industry by efficiently separating different particle sizes. They can useds for Metal Minerals, Industrial Minerals and other materials. GN Separation also makes screens from different materials, including Polyurethane Screens, Metal Gap Screens, Stainless Steel Wire Mesh Screen.

The tailings dewatering centrifuge is another remarkable product on display. It is designed to effectively remove water from tailings, reducing environmental impact and increasing resource recovery. GN Sepearion makes various sizes decater centrifuge, tricander centrifuge and disc centrifuges.

Additionally, the mud recovery system demonstrated by GN is highly efficient in reclaiming valuable mud for reuse, reducing waste and saving costs. It is turn-key solution complete with separation equipment, like the shale shaker, the desander hydraucyclones, the desilter hydraucyclones, the mixing system, mud agitators, transfer and mixing pumps, electrical control system, mud tanks, etc…

The sludge and solid vacuum pump also catches the eye, offering a reliable and innovative solution for various industrial applications. With these advanced separation equipment, GN Solids Control continues to lead the way in the field of solids control and separation technology.