Jun 04

       The decanter centrifuges made in China are different from the imported ones. The imported decanter centrifuge with the same function is about 6 to 10 times cost than the domestic one.

 The reason is that the imported decanter centrifuge is durable, and the control of temperature and speed is more accurate. The price difference between centrifuges of the same grade is not very big, mainly distinguished in performance and configuration. The difference of the equipment is that in terms of performance, centrifuges with freezing are much more expensive than ordinary ones. Some centrifuges also have heating functions. The more control programs, the higher the price of the centrifuge. The big difference is the configuration. Sometimes the price of accessories is higher than the price of the equipment. When purchasing, please note that in addition to the equipment, the selected rotor (number and type), plus the necessary centrifuge tubes, tube sleeves, special centrifuge bottles or blood bags, all of which add up to a complete centrifuge price. Centrifugation is to use the strong centrifugal force generated by the high-speed rotation of the centrifuge rotor to accelerate the sedimentation speed of particles in the liquid, and separate the substances with different sedimentation coefficients and buoyancy density in the sample. Therefore, it is necessary to use a centrifuge to generate a strong centrifugal force in order to force these particles to overcome the diffusion and generate a settling motion.


A decanter centrifuge is a machine that uses centrifugal force to separate components in liquid and solid particles or a mixture of liquid and liquid. The centrifuge is mainly used to separate the solid particles in the suspension from the liquid; or to separate two liquids with different densities in the emulsion that are incompatible with each other (such as separating cream from milk); it can also be used to exclude Liquid in wet solids, for example, dry clothes in a washing machine; special super-speed tubular separator can also separate gas mixtures of different densities; the use of solid particles with different densities or particle sizes to settle in liquids at different speeds, some of them settle The centrifuge can also classify solid particles according to density or particle size. Centrifuges are widely used in chemical, petroleum, food, pharmaceutical, mineral processing, coal, water treatment and shipping sectors.

       In ancient China, people used one end of the rope to tie the pottery pot, held the other end of the rope, and flicked the pottery pot to generate centrifugal force to squeeze out the honey in the pottery pot. This was the early application of the principle of centrifugal separation.

written by Decanter Centrifuge \\ tags:

Mar 12

News: GN Decanter Centrifuge for Oil Sludge Treatment to Brunei

This GN Decanter Centrifuge is specially designed for Oil Sludge Treatment and exported to Brunei.

2020.03.12 Decanter Centrifuge for Oil Sludge Treatment

Oil sludge is a mixture of oil, water and solids. Treatment with oil sludge would recover a lot of oil and water for reuse.
It is also an ideal solids disposal solution. The more oil and water are extracted, the more energy and resources could be
saved. GN oil sludge treatment products mainly include decanter centrifuge, oil-water separator and thermal desorption

GN P-series decanter centrifuge is mainly designed for the dewatering purpose. The beach angle of this series is 11
degrees. It is widely used for maximum dewatering requirements of municipal and industrial wastewater sludge. The
dewatering decanter centrifuge is designed for easy separation material include large particle size, high density
difference of solid and liquid, low viscosity, high concentration, high treatment capacity and higher dryness than clarity.
The materials like sludge or wastewater containing fine particles usually need to be added with flocculants to gather the
fine particles condensed into large ones, and then dewatered with P series decanter centrifuge.


Drilling mud, environmental protection sewage, oily sludge, cutting fluid, sand washing water, mineral washing water, soda
white mud, salt mud dewatering, magnesium aluminum emulsion, steel-making wastewater, precision casting wastewater,
construction mud, tunnel mud, mine wastewater, industrial wastewater, organic wastewater, aquaculture wastewater, chemical
industrial wastewater, printing and dyeing wastewater, municipal sewage, river sludge, water plant sludge, lake sludge,
kaolin grading, calcium carbonate, bentonite, Silica, titanium dioxide, calcium sulfate, barium sulfate, conductive film
glass polishing solution, aluminum hydroxide, cryolite, silicate, oil sand separation, landing oil, oil sludge, coal tar,
inorganic fertilizer, Chinese medicine extraction such as taxus chinensis, honeysuckle and liquorice, clarification,
concentration and dehydration of salt crystals, etc.

2020.03.12 Oil Sludge Treatment Equimpent

GN can not only provide users with Dewatering Decanter Centrifuges, but also provide users with turnkey solutions for
dewatering process, including solutions for material transportation, classification and dewatering. Rely on GN’s rich
production line of separation and conveying equipment, more and more reliable and advanced equipment will be manufactured
for users all over the world.

written by Decanter Centrifuge \\ tags: ,

Feb 28

The selection of the Decanter Centrifuge is essentially to find a specific machine that can meet the process requirements according to the physical properties of the materials and the process requirements.


The physical parameters related to the selection mainly include:

1.The parameters of Solid-liquid separation: the solid phase concentration of the suspension, the range of the particle size of the solid particles, the weight difference between the solid and the liquid, and the liquid viscosity.
2.The parameters of Solid-liquid-liquid separation: the solid-liquid-liquid 3-phase concentration, specific gravity difference, and viscosity.
3.Moreover, it is also important to consider the machine materials and structures such as pH, flammable and explosive, and abrasion resistance.

Another issue related to the selection is the purpose of separation. Different models have different purposes. Is it to obtain a solid phase with low water content, a liquid phase with high clarity, or both solid and liquid phase content are required, or a higher requirement for one phase and a lower for the other phase appropriately?

During the selection process, we may encounter two situations. One is an industrial problem, such as DDGS project of corn distiller’s grains, kaolin classification, lubricant purification, sludge dewatering, etc. The separation process and equipment have basically matured in the industry. When buying machines, you only need to access the existing Users for reference. The other is about the new problem encountered in the development of new products, which requires the necessary physical property test and separation experiment.

363 Decanter Centrifuge 2

Supporting facilities for Decanter centrifuge
A complete separation system, in addition to the decanter centrifuge, we also need a variety of other equipment and instruments to support it in order to put into normal operation. Normal supporting facilities include:
① Pretreatment device: crusher, shaker, desander, thickener, etc.
② Feeding device: feeding pump, draining pump, screw conveyor, flow meter, agitator.
⑧ Instrument control device: starting device, monitoring device, display and safety device.
④ Lighing, safety protection and cleaning equipment.

written by Decanter Centrifuge \\ tags: ,

Feb 10

GN Solids Control is China & USA leading brand for solids control and waste management. The company have been working for this field over 10 years. High quality product, premium service will make GN walk farer and longer.

1) GN product range

GN Solids Control items:  Shale shaker, desander, desilter, mud cleaner, centrifuge, mud agitator, mud gun, mud tank, centrifugal pumps, screw pump, shear pump etc.

GN waste management items: Thermal desorption unit, solidification unit, dewatering unit, flocculent unit, waste management centrifuge, slurry pump, oily sludge treatment system, modular waste management equipment, vacuum suction pump etc.

decanter centrifuge

2) Hot product of GN: Decanter centrifuge & shaker screen

GN Various model centrifuges:

9 inch baby centrifuge

14inch middle size centrifuge

18inch big bowl centrifuge

22inch big bowl big volume centrifuge

30inch huge bowl centrifuge for TBM, or other construction application.

GN Various shaker screen types:

GN replacement screen for Derrick FLC503 / FLC48-30, both flat screen/ pyramid screen available.

GN replacement screen for Swaco Mongoose, we recommend composite material shaker screen with longer life and better performance.

GN replacement screen for D380, we recommend composite material shaker screen with longer life and better performance.

GN replacement screen for Cobra/Venom shaker, we recommend composite material shaker screen with longer life and better performance.

3) GN overseas facility:

GN headquarter in suburb of Beijing, China – GN Solids Control

GN Solids Control have the latest technology machine for production. We have clean office building, regulated workshop and warehouse. We welcome client to check GN factory before order, to make sure the choose is wise.

GN have branch company in Houston, USA- GN Solids America.

GN Solids America have been in operation over 3 years. We have office, warehouse, sales people and workers there to support North America market and South America market. We welcome client close the USA coming to check GN product and talk with our sales for any project.

GN Solids Russia is working also to support Russia and neighbor Russia speaking countries.

written by Decanter Centrifuge \\ tags: , , ,

Sep 08

In recent years, the as the demand for environment protection is becoming more and more important, in some countries, there were even conflicts between the local residents and the oil companies or drilling companies. Companies would like to pay money on the disposal of the drilling cuttings, or, they have to face penalty even larger than the cost paid on the drilling waste management solutions.

The drilling waste management solutions for the oil and gas drilling could be divided into 2 groups: the treatment for the drilling cuttings and the treatment for the drilling fluids, the old mud.


The solution suppliers are bringing out several solutions for each group of drilling waste management, for example, in order to treat the old mud, there are several different ways, and among those, the decanter centrifuge and filter press are most prominent 2.

What they have in common?

Both of decanter centrifuge and the filter press need some chemicals to do the job, to separate out the extra fine particles from the drilling fluid.

What are the differences?

The decanter centrifuge uses the high G force generated by high speed rotating of the bowl to separate the solids from the liquid, while the filter press’ working principal is to squeeze the liquid from the solids through some filter with small holes and make the solids phase into a cake.

How are their performances?

Per their treating result, both solutions could treat out 90% solids from the liquid, especially the decanter centrifuge, the percentage is up to 95%. But when take the total cost into consideration the decanter centrifuge clearly wins out because: 1. The centrifuge uses less water than filter press. 2. Less electricity consumption. 3. Less manpower requested. That’s why 8 of ten end users are using decanter centrifuge.


For more equipment such as shale shaker, mud gas separator, shear pump, mud mixing system etc. and solution advise, welcome to contact GN Solids Control freely.

written by Decanter Centrifuge \\ tags: , , , , ,

Sep 06

Dewatering technology is greatly use for chemical separation of the solids phase form the liquid. By using some chemicals, the fine particles of solids flocculate into larger ones and to be separated out from the liquid phase. Take the oil and gas drilling mud industry as example, there are 2 main methods to be used, the dewatering centrifuge and the filter press. Seen from their outlook and working principle, they are quite different, but which to choose and why to choose is not only based on the first look, we need a detailed calculation.

  1. Purchasing cost. The cost for buying each of them is no much different, and also comparing with future consumption, this cost seems less important.
  2. The chemicals consumed: because of the high speed and high G force of the decanter centrifuge, no much chemical is needed. But in case of filter press, more chemicals in need for fulfil the work.
  3. Water usage amount: the decanter centrifuge need to be flushed only after continuous operating and the water consumption for each time is 3-4 cbm per day, but the filter press need to be flushed all over after usage, need around 150 cbm per day. In some water scarce place, this factor has to be taken into consideration.
  4. Human force needed: it is not a heavy work to operate or observe the operation of the decanter centrifuge, so one person for one centrifuge is enough. In case when several centrifuges are at same place, even one operator can work for them all. But in case of filter press, one filter press need at least 2 persons to run it.
  5. Spare parts: the spare parts for decanter centrifuge is less than the filter press.

GN centrifuges

GN Solids Control is professional in decanter centrifuges, GN has decanter centrifuges from 9 inch bowl diameter to 22 inch bowl diameter and now GN decanter centrifuges are not only used for oil and gas industry but also for other industries. For more information, welcome to contact GN freely. GN solids control produced mud handling equipments and mud tanks are mainly used for cleaning and recycling the used driling fluids from the well bore. The mud handling equipments range including: Shale shaker, mud cleaner, desander, desilter, vacuum degasser, chemical mixing unit, Mud Gas Separator, mud agitator, bottom mud gun, shear pump, decanter centrifuge, vertical G cuttings dryer.

written by Decanter Centrifuge \\ tags: , , , , , , , ,

Aug 30

GN’s decanter centrifuge has two types of control methods, one of which is making the decanter centrifuge running at a fixed speed, the other one is driving the centrifuge with program through a VFD panel. As the name implies, the panel could control the decanter centrifuge to run at variable speed to meet the operation demand.

However, it was too simple if the VFD panel can only drive the centrifuge to run with a wide range of speed. The VFD panel should be much smart than only speed control. GN’s decanter centrifuge is driven by 2 motors; one main drive for the bowl speed, the other one auxiliary is for screw propellers. GN’s VFD is for three devices, main motor, back motor and feeding pump motor. For the decanter centrifuge, the operator could input the bowl speed and differential speed on the touch screen, with these 2 speeds, the program will then calculate the back drive speed.

GN’s 14 inch decanter centrifuge is designed with Max. speed up to 3900RPM, however, the for oil filed drilling mud cleaning application, the operators will not run the centrifuge at a so high speed. GN solids control VFD panel could classify the speed into 2 steps. The first step is from 0 to normal working speed like 3200 RPM. In this range, all the operators could set the speed in any value. For higher speed, only the director or manager could set it by inputting the pass word first.

decanter centrifuge

GN’s panel can also monitor the temperature of the bearing and the current to protect the centrifuge. Like GN’s panel will collect the signal from the sensors at the bearing and transfer it into visual data thus the operator will know the actual temp. at the bearing. GN also has windows to show the Ampere percentage of the motor current. Once the actual Ampere reaching up to pre-set value, the machine will trip off.

Operators need read GN VFD panel manual carefully before running it. It takes some time to know how to operate GN VFD centrifuge well.

written by Decanter Centrifuge \\ tags: ,

Aug 19

As is well known in the oil and gas drillingindustry, GN Solids Control has become a more and more famous brand among the solids control manufacturers. And along with the development of the industry and the higher standard for the discharged waste, this industry is more and more depending on the drilling waste management solutions. In order to have are more efficient solution, every manufacturer is trying to provide some ideas. GN Solids Control is the one who has brought its idea into reality and such solutions are proved to be useful.

Solidification Unit

GN products range covers following fields:

  1. Oil and gas drilling solids control equipment including shale shaker, desander, desilter, mud cleaner, decanter centrifuge, mud agitator, mud guns, pumps and vacuum degasser and etc, and GN is professional for the complete system including the mud tanks.
  2. Mud recycling system for other drillings like HDD, CBM, TBM and water well drilling, for such systems, GN has both the economic configuration option with necessary treating phases an high configuration option with complete treating systems.
  3. Drilling fluids drilling waste management systems, which is used to treat the old mud, to make the old mud from the system to be suitable for further drilling again. Here GN employs some chemicals together with physical separation as dewatering unit and dewatering centrifuge.
  4. Drilling cuttings waste management systems, for water based mud, the high-G dryer and decanter centrifuge, for oil based mud ,the vertical cuttings dryer and the high speed decanter centrifuge.
  5. Final treatment for the high request treating result. In order to fulfill the higher request of treating result before discharge, GN has designed GNGH series solidification unit and TDU for final treatment of drilling cuttings.

written by Decanter Centrifuge \\ tags: , , , , , ,

Aug 11

Mud plant is very important application in solids control industry for oil and gas drilling industry. It is used to further treat and to storage the drilling mud back from the solids control system of rig site and get the drilling mud to be ready for next time use.

drilling mud system

What equipment is used for a mud plant?

Normally, the mud plants’ main application is for storage the drilling mud, and adding some necessary chemicals into the mud. So the commonly used equipment is:

  1. Mud agitators. Where there’s mud, there’s agitator. Because if the mud is still for a while, the heavy components in the mud would settle down to the bottom and as long as they settle down, it is difficult or even impossible to re-stir them. So mud agitator is a continuously working equipment in a mud plant. GNJBQ series mud agitators covers all necessary models for oil and gas use mud agitators, it is compact in structure and with a powerful strength. Based on your tank depth, GN could recommend you with suitable model of mud agitator.
  2. Mud guns. Normally, the mud gun and mud agitator are used in pairs, like besides each mud agitator, there’s a mud gun. As the mud agitator is working in the middle of the tank, the mud gun is used to stir the mud in the tank corner. GN mud gun is suitable for high pressure up to 6.4 Mpa, and there are fixed nozzle models and rotary nozzle models for option. In addition to the main application as stirring the drilling mud at tank corner, the mud gun could also be used for transporting the mud from one tank to another.
  3. Jet mixing system. It is combined by a jet mixing hopper and a feeding pump for the hopper. For making the old mud to be suitable for future use, we need to add some chemicals into the mud. GNSLS series hoppers are made of stainless steel, with same or even better material than USA brands and with a longer service life. GNSB series centrifugal pumps are interchangeable with MISSION pump with spare parts. It could be used as feeding pump for hopper and desander or desilter’s feeding pump.

written by Decanter Centrifuge \\ tags: , , , ,

Aug 02

Chinese leading solids control machinery manufacture GN Solids America LLC,   strategic located outside of Beijing for fast shipping around the world, we manufacture full line of solids control machinery and drilling waste management equipment , jet mud mixer is one of the products we manufacture our self and offer to various type of drilling project. GNSL series jet mud mixer is the machinery to prepare and increase the drilling fluids weight by adding and mixing  betonies, change the fluid density, change the mud density, viscosity, and dehydration. The effect is more prominent matching with Shear Pump. GNSL jet mud mixer is a unit used together with the drilling mud system for petroleum drilling and horizontal directional drilling (HDD).

Jet mud mixer’s purpose is to increase and the configuration of the drilling fluid machinery, the main function of the jet mud mixer is to change the drilling fluid density, viscosity and water loss.

GN Jet mud mixer 2016

The equipment with more obvious effect with combination of the shear pump because the betonies powder, chemical treatment agent, barite is equal to the water into the drilling fluid formulated with particular spec or add some additives in drilling fluid has to change its properties.

Jet mud mixer has long proven record of usage in solids control operation.  Drilling mud will change its character by overly use and clean and it needs device like Jet mud mixer to restore the ideal mud condition by adding chemicals and additives to the mud and keep the ideal mud condition.

Jet mud mixer and oil drilling mud system supporting the use of the equipment, the utility model has the advantages of safety and reliability, convenient movement and transportation.  Jet mud mixer has a pump can also be multiple-use and one jet mixing hopper (or multiple) with a pipe valve connection installed on a base composition.

written by Decanter Centrifuge \\ tags: , , ,