Decanter centrifuges-the preferred equipment for foreign sludge treatment

Industry experts pointed out that with the massive construction of large-scale municipal sewage treatment plants in our country, decanter centrifuges are increasingly used in the municipal sludge dewatering field, leading to some foreign brands one after another pouring into the Chinese market. Some domestic manufacturers also use cheaper Price into the market.

Decanter Centrifuges
Decanter Centrifuges

Although imported decanter centrifuge price is 2 to 3 times than the domestic price, the imported decanter centrifuge still occupy a larger market share. In the area of ​​sludge dewatering in industrial and municipal wastewater treatment, especially in some newly-built municipal sewage treatment plants, almost all of them are used the imported decanter centrifuges.

Undeniably, the centrifuge industry first developed in foreign countries, the early core technologies are also in foreign countries, decanter centrifuge has also become the preferred foreign sewage sludge treatment equipment. Despite its late start, our country has also experienced more than 20 years of hard work. Through cooperation with foreign countries and its own research and design, the domestic centrifuge technology has been almost mature, and began to compete with foreign countries in high-end decanter centrifuges .

Decanter Centrifuge
Decanter Centrifuge

Therefore, the decanter centrifuge in the field of urgent need to break the dependence on imports, learning more advanced foreign technology, innovation, research and development for China’s pharmaceutical industry needs decanter centrifuge, centrifuge equipment to slowly withdraw from the Chinese market To achieve self-sufficiency.

Mr. Fang Bochun, general manager of Jiangsu Environmental Protection Equipment Co., Ltd., said: “In the next five years, the centrifuge industry will usher in tremendous changes. Enterprises should step up research and development capabilities and put new centrifuge design concepts into production as early as possible. Many new centrifuges to market, so as to truly solve the separation requirements of large enterprises and provide effective solutions to enhance the international image of China’s centrifuge field. “(Editor:Kosun Lily.Wang)

Kosun- China Solids Control Leader&Drilling Waste Management Expert

Tel.: +86 29 87304914


Contact person: Lily Wang

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Oilfield Solids Control of Decanter Centrifuge

In the whole solids control system, the drilling mud Decanter Centrifuge is the most important solids control equipment, it is the forth stage equipment and it decides the quality of drilling fluids in a way. The first equipment is oilfield shale shaker, it is one of the most important equipment, too. The second stage equipment is desander, third equipment is desilter. Sometimes they are combined to be as one equipment—drilling mud cleaner.

Oilfield Solids Control
Oilfield Solids Control

KOSUN Drilling Fluid Centrifuge is designed to speed up the settling process. The rotating speed is transformed into centrifugal force inside the rotating assembly to accelerate particle settling in accordance with Stoke’s Law. In essence, a centrifuge is a miniature settling pit that alloys very rapid settling of solids under controlled conditions. Though much more complicated than a hydrocyclone, centrifuges have the advantage of achieving extremely fine cut points. Centrifuges can improve the cut point by a factor of 6X when compared to a prototypical shaker/hydrocyclone system and can dramatically increase the drilling fluid life.

Decanter Centrifuge

KOSUN Decanter Centrifuge can effectively remove the harmful solid particles from the oil and gas drilling fluid, improve the mud performance, ensure the drilling safety, lessen the pollution of oil/gas reservoir and reduce the mechanical abrasion of drilling equipment. 1500-3000 rpm centrifuge can separate 2-7μm solid particles. It is an ideal choice for drilling mud purification.

Drilling fluids is important for the whole drilling system, but is too expensive, we usually spend abundant expense for that. But if we clean the drilling fluids and use it for recycling, we can save more drilling cost. At this time, the drilling fluids solids control of the drilling fluids seems to be so important.

Kosun- Solids Control Company

3 Phase Decanter Centrifuge in Oil Recovery Unit

3 Phase Decanter Centrifuge(Three-phase Decanter Centrifuge) is also called Tri-canter centrifuge, it is commonly used in oil drilling work to separate the oil rate from drilling solids, it belongs decanter centrifuge series. In Oil Recovery Unit project, 3 Phase Decanter Centrifuge is the core solid control equipment in the whole system. Today we will share more information about 3 Phase Decanter Centrifuge.

3 Phase Decanter Centrifuge

Just as we all know that decanter centrifuge is the main equipment for a whole solid control system, even in the drilling waste management unit, we also need a VFD decanter centrifuge (of course, cutting dryer is also the core part one on drilling waste management, while mud cleaner is the important equipment in solid control system), both system should be worked with drilling mud tank, that is to say, the whole equipment should be mounted in the mud tank. 3 Phase Decanter Centrifuge is the core one for the whole oil recovery unit.

You will find necessary information about oil recovery unit in last post. We did not mention the 3 Phase Decanter Centrifuge in that post. In our design, 3 Phase Decanter Centrifuge is a kind of solid control equipment used to separate the mud, water and oil from the drilling solids. Comparing with traditional decanter centrifuge, the most important function of the three-phase decanter centrifuge is that it could separate the oil from the drilling solids, while the traditional one just could separate the mud and water.

Generally speaking, 3 Phase Decanter Centrifuge is always used in huge solid control system or the system like Oil Recovery Unit. The common feature of these units is they are huge and complicated. At the same time, because of the high technology needs and heavy difficult for design and manufacture, 3 Phase Decanter Centrifuge is the one with blooming and splendid.

If you are interested in our solid control system or drilling waste management, please feel free to contact Kosun for more details information. We are always here to support your demand!

Kosun- Solid Control System Company

Why decanter centrifuge is indispensable in drilling operation?

Before hydrocyclones (desanders and desilters) and decanter centrifuge became available for drilling applications, shale shakers and dilution were the only means of solids control of drilling fluids. Consequently, solids too fine to be separated by the shaker screens in use could be controlled only by dilution which was a costly procedure that generated large quantities of excess drilling fluid. Decanter centrifuge was designed to remove the fine cut and at the same time reduce the drilling cost.

The work principle of decanter centrifuge:Centrifuges, like shale shakers and hydrocyclones, are solids control equipment, It achieves the separation goal by dividing the fluid into highdensity and lowdensity streams to separate one from the other. The processing is achieved by accelerated sedimentation. As the drilling fluid passing through a rapidly rotating bowl, centrifugal force moves the heavier particles to the bowl wall, where they are scraped toward the underflow discharge ports by a concentric auger, also called a scroll or conveyor, which rotates at a slightly slower rate than the bowl. The separation of the heavier particles divides the processed fluid into two streams: the heavy phase, also called the underflow or cake; and the lighter phase, which is called the overflow, light slurry or centrate. The heavy phase will be discarded while the lighter one will be returned to the mud tank to be further treated. The removal of these solids in order to control rheology and filter cake quality is the primary reason for centrifuging weighted drilling fluids. When the finest solids are not removed, the only alternative means of reducing their concentration is dilution, always an expensive process.

Features of KOSUN LW serious decanter centrifuge 

  1. Innovative design includes longer bowl for increased retention time, resulting in drier solids and finer cut points
  2. Big bowl Big Volume, high G force available
  3. Stainless steel bowl, scroll, compartment and cover resist corrosion and provide long service life.
  4. Tungsten carbide scroll points with wide spacing flights at tapered end create a finer layer of conveyed solids for consistent, uniform separation and maximum solids control efficiency.
  5. German FAG or Sweden SKF brand bearings
  6. Electrical Components: SIEMENS/Schneider ATEX or IEC Ex for option.
  7. Screw pump & centrifugal pump feeding pump option available to meet different application.

To meet the requirements of the development of modern drilling engineering, KOSUN developed and equipped with the explosionproof variable frequency control system which could adjust separation factor and drum rotational speed.By this new technology,make the centrifuge to adapt property changing of mud duringthe operation process,that make the treatment more effective and perfect.

Related information:

Kosun- Solid Control System Company

Introduction of Kosun 3 Phase Decanter Centrifuge

Kosun 3 Phase Decanter CentrifugeTypical Applications:Oil sludge treatment, animal/plant fat & oil extraction, starch & vital gluten separation, fish oil, albumen and fish meal separation in fish oil field.

3 Phase Decanter Centrifuge

3 Phase Decanter Centrifuge can be used in following cleaning, solid remove and impurity remove 3 phase separation field: tar, pesticide, oil filed recovered oil, used oil, waste oil & fat from restaurant, palm oil, oil tank cleaning, oil refining sludge, oil station cleaning sludge, olive oil, orange oil, gas floating sludge, food waste sludge.

3 Phase Decanter Centrifuge Operation Principle:

Similar with 2 phase decanter centrifuge operation principle, under the centrifugal force the feeding material can be divided into three relative stable layers. From the bowl inside wall there will be solids phase layer, heavy liquid phase and light liquid phase.

The solids phase layer is pushed to bowl small-end part by conveyor and discharged from solid outlet. The heavy liquid phase and light liquid phase are delivered to bowl big-end part and discharged separately from two different outlets.

It can reach three-phase separation.

Separation Type:

Solid -liquid –liquid

Liquid -liquid-solid


As a solids control equipment decanter centrifuge manufacturer, KOSUN supply other solids control equipment for sale, including shale shaker, shale shaker screen, desander, desilter, vacuum degasser,decanter centrifuge , centrifugal pump, submersible slurry pump, shear pump, mud agitator, mud gun, drilling fluid mud cleaner, decanter centrifuge, mud tank, diesel tank, water tank, complete solids control system, etc.

Kosun solids control undertakes equipment selection, design and manufacturing according to material data and actual demands of users. We warmly welcome users to visit our Company for field investigation, technical exchange and long-term cooperation. (Editor:Kosun Lily.Wang)

Kosun- Solid Control System Company

Tel.: +86 29 87304914/86-13891934239


Online consulting:


What is the Advantage and Disadvantage of Decanter Centrifuges

Decanter Centrifuges

Decanter Centrifuges  are   machines that are used in separating various densities in a liquid. The separating process is done very efficiently by a decanter centrifuge. There are many advantages and a few disadvantages as well of this equipment.

Decanter Centrifuges
Decanter Centrifuges

•    The appearance of Decanter centrifuges is clean and is almost odourless.
•    The decanter centrifuges device can be installed easily and is start up and    shutting process is very fast.
•    It needs minimum area for its operation.
•    The variety in size of the cylindrical bowl and the cone angle allows choosing various applications.
•    With different design curves the system is pre-programmed that calculates the type of sludge.  Due to its flexibility the machine has different functions like the operating for dewatering and thickening.
•     Compared to other smaller machines, the decanter centrifuge operates on a high throughput capacity that minimizes the requirement of units.
•    Its variety and reliability feedback option makes the decanter centrifuge easy to operate and effective.
•    The cost on labour has reduced as it does not require continuous attention for maintaining and operating.
•    The performance level of decanter centrifuge is much higher if compared to other competitive process.
•     For various industrial functions and processes decanter centrifuges are the perfect solution.

•    Biological solids with minute density cannot be separated by the decanter centrifuge. This is best done by the tubular bowl centrifuge.
•    At times the decanter centrifuge can be very noisy and also causes vibration.
•    Due to the high G-forces it consumes a large amount of energy.
•    The narrow range with changeable conditions limits the performance of the device.
•    Right type of sealing material should be selected that are both chemical and thermal resistant.
•    Compared to other varieties of centrifuges, the decanter centrifuge is cheaper.

KOSUN has many products: shale shaker , cutting dryer  , shaker screen , drilling waste management equipment ……

Kosun always been persisting in the two principles: one is Quality First and the other is Customer Oriented.

We are looking forward to your coming!

Decanter Centrifuges of Related Common Challenges

Decanter Centrifuges

Decanter Centrifuges are used in separating suspension of solids phase with particle ≥2μm in diameter for drilling mud and fluids handling.

All machineries will have its own set of requirements to give its user the desired performance and durability and off course the much desired economy. After all “Return on investment” is the mantra that investors care to heed about.

Decanter Centrifuges
Decanter Centrifuges

When it comes to solid control equipments, this is no exception. A few careful measures go a long way to ensure that the operators will find the equipment reciprocating their care for them.
The first and foremost one in this aspect is the preventive maintenance of the equipment. The decanter centrifuge as such is low maintenance equipment and has a high capacity of handling the drilling waste treatment , but that should not mean for the operators to simply overlook the state of operation of the equipment.

A very common mistake committed by the operators is the continuous use of equipment without giving it rest and inspection for any wear. The moment any component is spotted showing any signs of wear, operators should consider fixing it, without just pushing it for further use, however small. As it goes with machinery, that all components work in sync, so even a worn out rubber could cause the breakdown of entire equipment. So watch out for any kind of wear or damage.

Another challenge faced by drilling industry in context of economic configuration decanter centrifugeis the lack of trained personnel or operators. With evolving technologies, decanter centrifuges have been made much more automated and need little operational attention. However, to maneuver the equipment to achieve the desired output, need of staffing appropriate personnel is of paramount importance.  With ever stringent health and safety regulations, rig operators struggle with their staffing needs.

The high turnover further adds to the problem. Finding the qualified and experienced operators and investing time in resources in training them to bring the up to speed is a very big challenge for project managers.