6 Sets VFD Decanter Centrifuge for Mud Treatment Supplied to China

Decanter centrifuges are used in a wide variety of industries to separate solids from liquids. They are typically driven by variable frequency drives (VFDs), which allow for more precise control of the centrifuge’s speed. GN supplied 6 sets of GNLW453D-VFD decanter centrifuges this time to a Chinese client.

The ability to vary the speed of the centrifuge allows it to be used for a wider range of applications. For example, it can be used to process slurries with different solids contents or viscosities. Besides, By optimizing the speed of the centrifuge, the separation of solids and liquids can be improved. This can lead to higher quality products with less waste.

Here is the specification of this model:

How Does a Decanter Centrifuge VFD Work?

A decanter centrifuge VFD works by controlling the frequency of the electrical current that is supplied to the centrifuge motor. This changes the speed of the motor, which in turn changes the speed of the centrifuge. The speed of the centrifuge is typically controlled by a feedback loop that monitors the level of solids in the centrifuge.

The centrifuge can separate drilling mud in which the fluid phase was separated by shale shakers and mud cleaners, and it’s feed pumps are usually screw pumps. This equipment will make the fluid phase more clear and reused in the drilling fluids process.

If you are interested in our VFD decanter centrifuge and other solids control equipment, please contact me at samuel@gnsolidscontrol.co

Introducing GN Oil Sludge treatment System.

A client in Iraq asked me about an oil sludge treatment system last Wednesday, and I am here to share with you some details about this package.

This is a stock of 1m3/hour GN oil sludge treatment systems available for sale in China. This system can be used for treating oil sludge from oil fields, wastewater, oil recovery, and the separation of solids/water/oil in various fields.

The results after treatment with the Oil Sludge Treatment System are as follows:

  • Oil content in solids: less than 2%
  • Oil content in water: 500 ~ 1000ppm
  • Water and sediment content in oil: less than 3%

GN also supplies a microbubble water processor, which can be used to reduce oil content in water to 50 ~ 100 PPM.

This oil sludge treatment system storage has a capacity of 1m3/hour, calculated based on a solids content of less than 20%.

It includes a pre-mixing tank, shale shaker, decanter centrifuge, disc separator, polymer dosing unit, and accessories.

The working procedure for the oil sludge treatment system is as follows:

  1. Pre-mixing tank: Heat and add chemicals to the used oil sludge to reduce the solids content to less than 20%, making the sludge pumpable/fluid.
  2. Shale Shaker Unit: To mechanically separate coarse/large solids using a screen, usuallyGN594J.
  3. Two-phase decanter centrifuge unit: To separate fine solids and liquids, with further treatment of the liquid using the disc separator, it could be used different models based on work site condition.
  4. Three-phase disc separator unit: To separate oil, water, and small/fine solids in the liquid from the decanter centrifuge.
  5. There is a set of chemical dosing units for this system, and the chemical materials usually include demulsifiers and flocculants.190329 Oil Sludge Treatment Equipment

The inclined plate clarifier and the oil-water separator are optional based on project requirements.

Feel free to contact me for more technical specifications and services at samuel@gnsolidscontrol.co.

Hydraulic Centrifuge and Screw Pump: A Match Made for Wastewater Treatment.

Hydraulic centrifuges and screw pumps are two types of equipment that are often used together in industrial applications. The hydraulic centrifuge is used to separate solids from liquids, while the screw pump is used as the feeding pump for the centrifuge.

GN Solids Control is a leading manufacturer of decanters centrifuges. We have partnered with Viscotherm and ROTODIFF®, leading brands of centrifuge hydraulic driving systems from Switzerland, to develop the Full Hydraulic Drive (FHD) Centrifuge. This centrifuge meets the highest standards and is designed for international clients. The FHD Centrifuge uses a hydraulic bowl and scroll drive system that is powered by a hydraulic pump unit. This system drives both the hydraulic motor ROTODIFF and the bowl of the centrifuge. The two hydraulic oil circuits allow for independent, stepless, and large-range speed regulation for the bowl and conveying. The FHD Centrifuge has several advantages. It can be used in high-temperature ambients, is designed for heavy mud, and has a flexible bowl and differential speed. The compact one-skid design makes it easy to rig up.

A screw pump is a progressive cavity pump that uses a rotating rotor with a series of helical blades to move fluids. The blades create a series of chambers that trap the fluid and move it along the pump. The pump is gentle on the fluid, so it does not shear or agitate it. It can handle high-viscosity fluids and hard-suspended particles for a mud system, and a good feeding pump for centrifuges. It is easy to maintain, better pumping than a centrifugal pump, and the only worn parts are the rotor and stator.

The combination of the centrifuge and the screw pump could be mounted with a skid:

If you are interested in the skid and equipment, or you have a project in drilling mud treatment or waste fluid treatment, please feel free to contact me for more details.

Liquid Mud Plant: A Key Piece of Equipment for Drilling Operations

Drilling is a complex and dangerous opeLiquid mud plants are one of the most important pieces of equipment in a drilling operation. They are used to produce and circulate drilling mud, which is a fluid that is used to lubricate the drill bit, remove cuttings from the borehole, and control formation pressure.

Last Tuesday, I received an inquiry from a customer about our liquid mud plants. I replied with some pictures of our tank system, which is a part of a mud plant. However, the customer needs more details.

2023.06.29 Solids Control System

The liquid mud plant typically consists of storage tanks (usually cylinder tanks)with a mud system, but the system is not all the same as a solids control system. A mud plant tank system including the following equipment: The Hopper with Agitators, centrifugal pumps,  Shale shaker (as well as mud cleaner), and sometimes centrifuges are also necessary.


The agitator mix the drilling mud ingredients together, such as barite added from the hopper. GN supplies two types of mud mixers that are useful in a tank system: jet mud hopper and shear hoppers.

The shale shaker separates the drilling mud from the cuttings. GN typically recommends the GNZS-594 for mud separation. In addition, a shaker can be installed with desanders and desilters to create a mud cleaner. GN supplies 2S12N or 3S16N mud cleaners with 594 bottom shakers.

The centrifuge removes very fine particles from the drilling mud. The specific model of centrifuge will vary depending on the specific requirements. Usually, we supply 363, 453 and 553 models.

The centrifugal pump moves the drilling mud or barite through the separation equipment and hopper or pumps the mud to the storage tanks. All the spares of GN C-pumps are replacement with Magnum pumps.

2 2021.11.24 Drilling Mud Centrifuge

Besides, a complex mud plant might need degassers or screw augers for degassing or screw muds. A vertical cutting dryer is necessary when treating OBM.

A liquid mud plant is essential for safe and efficient drilling operations. The mud must be mixed to the correct specifications, and it must be circulated through the drill bit at the correct rate. The cuttings must also be removed from the mud on a regular basis.

I hope this blog post has been helpful in providing you with an overview of liquid mud plants. And I had already shared with my clients the brochure of the mud system and equipment introduction. If you also have an inquiry of a mud plant, please contact me at samuel@gnsolidscontrol.co.

Solids Vacuum Pump and Mud Cleaner for Middle East Oilfield Service Company

GN Solids Control, a leading manufacturer of solids control and drilling waste management equipment in China, recently completed a shipment of specialized equipment to a prominent oilfield service company in the Middle East.


The shipment included 3 vacuum pumps, which will be used for tank cleaning, as well as a GNZS594J-2S12N mud cleaner and a GNLW363D decanter centrifuge.



The vacuum pumps are designed to remove solids from drilling fluids, which helps to prevent drill pipe blockages and improve drilling efficiency. It can be used at tough environments for solids. They are pneumatic slurry transfer vacuum pumps that are high vacuum loading solids transfer pumps, so they can be used in tough environments for solids or sludge transfer with high working performance and less maintenance.





The GNZS594J-2S12N mud cleaner is a high-performance mud cleaner that removes solids from drilling fluids, which includes  2 desanders, 12 desilters and a GNZS594J bottom shale shaker—the stainless steel shaker deck, which angle could be adjusted during processing.




The GNLW363D decanter centrifuge is a solid-liquid separation device that separates solids from drilling fluids. With a bowl diameter of 14 inches, bowl length of 50 inches, and speed of 0-3200 RPM, it is the most commonly used model in tank cleaning or solids control projects.

If you have such a tank cleaning projects and interested in these equipment, please contact me with samuel@gnsolidscontrol.co