Saving and environment protection decanter centrifuge

KOSUN DC Series Saving and environment protection  Decanter Centrifuge is used to separate suspended solids ≥2μm in diameter and treat the drilling mud and fluids. It is especially effective when used in oilfield service industry, industrial service industry and especially in environmentally sensitive areas. This type of centrifuge is high in recovery rate, effective in solids control and remarkable in the reduction of cost spent on drilling mud resupplying and management. It is a very sophisticated dynamic balancing machine, able to operate stably with the whirling speed ranging from 0 to 3900 and generate centrifugal force of 3000G.

Decanter Centrifuge
Decanter Centrifuge

Features and Benefits of KOSUN Decanter Centrifuge:

  1. Innovative design includes longer bowl, allowing drilling fluids to thread through more slowly, thus resulting in drier solids and finer separation point;
  2. Big bowl offers big volume. It also generates high-G force;
  3. Stainless steel bowl, scroll, compartment are available and covered with corrosion-proof coating so as to have longer lifespan;
  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 Swedish SKF brand bearings are available;
  6. Electrical Components complies with SIEMENS/Schneider ATEX or IEC Ex.
  7. Screw pump and submersible slurry pump are provided to meet liquid feeding requirements of centrifuge of various customers

KOSUN Decanter Centrifuge can meet with different requirements of mud treatment under various drilling conditions, that can do sedimentation and separation for particles more than 2 μm. After treatment, the mud can achieve ideal viscosity and proportion, resulting in better recycling, high efficiency, saving and environment protection.

decanter centrifuge manufacturer
decanter centrifuge manufacturer

Decanter Centrifuge Manufacturer: KOSUN is a manufacturer for drilling waste management equipments, solids control equipments and oil sludge treatment system in China. Kosun manufacture the top technology of decanter centrifuge, Hi G dryer shaker, and vertical cuttings dryer.(Editor:Kosun Lily.Wang)

Kosun- China Solids Control Leader&Drilling Waste Management Expert

Tel.: +86 29 87304914


Contact person: Lily Wang

Online consulting:

Model Selection Guide of Decanter Centrifuge

Many people can easily know how to choose a decanter centrifuge, but it is a little difficult for them to select a suitable model of centrifuge. Here is a simple method to judge a proper model for you.

decanter centrifuge
Decanting Centrifuge

First, the model of a decanter centrifuge represents the following meanings: For example, LW450*842, a model of decanter centrifuge, among which L means Luoxuan in Chinese Pinyin, W means Woshi in Chinese Pinyin, 450 means the bowl diameter of decanter centrifuge, and 842 means the bowl length of decanter centrifuge.

A suitable model of decanter centrifuge can not only solve production problems and improve work efficiency, but also save production cost and reduce business risks. Several main factors that determine the centrifuge model are as follows:

decanter centrifuge
decanter centrifuges
  1. Speed of decanter centrifuge: The speed of a common decanter centrifuge is more than 2000RPM. For some materials hard to separate, a higher speed is required. The higher the speed is, the higher the separation factor of centrifuge, the better the separation effect.
  2. Material of decanter centrifuge: PH value of materials to be treated determines the bowl material of decanter centrifuge. Different materials have diverse physical and chemical indexes in their abrasion and corrosion resistances. Overseas decanter centrifuges are generally made of 316L or duplex stainless steel, with wear parts made of ceramic materials.
  3. Differential control of decanter centrifuge: Different differentials have different control accuracies, service lives and maintenance costs. The higher its differential accuracy is, the better its adaptation to materials is. So it is advisable to select equipment with a high differential accuracy.
  4. Length-diameter ratio: The bigger the length-diameter ratio of decanter centrifuge is, the higher the handling capacity is, the lower the moisture content is.
  5. Control system: At present, almost all of equipment manufacturers at home and abroad have achieved a full automatic control over the equipment.
  6. Installed power: As for a control over energy consumption, generally speaking, domestic equipment has a higher energy consumption ratio, while foreign equipment has a lower one.
  7. Manufacturing technique: Since a decanter centrifuge is a kind of separation equipment with high precision machining requirements, the centrifuges manufactured by enterprises without a precision machining capability will suffer from a high maintenance ratio and a restricted handling capacity.

Kosun- Solids Control Company

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

Decanter Centrifuge Safety Operation Regulation Tips

In the whole markets, centrifuge or even decanter centrifuge has been used in most fields. There are also mutual types or styles of decanter centrifuge in different fields. We just take oil drilling industry as an example,there are RFD decanter centrifuge, VFD decanter centrifuge, Disc centrifuge, hydraulic centrifuge, etc.

Decanter Centrifuge
Decanter Centrifuge

Now KOSUN want to share some necessary tips about safety operation regulation for decanter centrifuge. The following content is about the topic of “6 Tips of Safety Operation Regulation for Decanter Centrifuge”.

Decanter Centrifuge
Decanter Centrifuge

Just as we all know that Decanter Centrifuge is one kind of machine revolving at high speed. During operation, revolving drum will generate strong centrifugal force (it is not like the solid control system, to some extent, decanter centrifuge is a core part for a whole solid control system and water based mud unit). To ensure the safety of operators and equipment, the following safety rules shall be strictly followed when using it.

  1. Pay more attention for original Instruction Orders or Steps. Through dynamic balance of revolving drum parts of centrifuge, during assembly, original installation order shall not be changed and there shall be no parts omitted. Threaded connection part shall be installed in place; during assembly, if there is assembly mark, the mark shall be aligned. Before startup, operating pump system shall be inspected and there shall be no water leakage under close state of magnetic valve.
  2. Keep the decanter centrifuge off. Before clamping revolving drum clamp ring and fixing inlet/outlet device and other fastening screws, decanter centrifuge shall not be started.
  3. Before completely stopping revolving drum, any part of equipment shall not be loosened.
  4. During operation, if abnormal vibration of decanter centrifuge is found, power shall be cut off for emergency shutdown. After revolving drum is completely stopped, each part shall be disassembled cleaned and inspected and attention shall be paid to assembly order and position. After the causes of abnormal vibration are found out and removed, reassembly and startup can be carried out. Time interval between re-startup and shutdown shall be more than 4h (This item is also suitable for mud cleaner).
  5. Flame heating or repair welding of main revolving drum parts is not allowed, especially revolving drum body, revolving drum cover and clamp ring.
  6. Use of revolving drum parts and revolving drum parts of other equipment shall not be mixed, even the revolving drum parts with same model.
3 Phase Decanter Centrifuge
3 Phase Decanter Centrifuge

The above 6 tips or we can call it as steps should be kept in our mind, they can help us improve our working efficiency. Just as I mentioned in the post, you could find more information about solids control system, drilling waste management unit, oil recovery unit, and some other solids control equipment, such as mud cleaner, sand pump, vacuum degasser, cutting dryer, etc. In another words, KOSUN could be your better cooperator.

Operating and maintaining process of decanter centrifuge

decanter centrifuge is a very useful equipment for any drilling site. A decanter centrifuge is basically used to dilute the fluid that is extracted from the gas or oil mine. Generally, the liquid that is extracted from a mine is of highly concentrated and coagulated. So, extracting minerals from them is practically impossible.  In order to thin up the extracted fluids, a decanter centrifuge is used. By using the rotational speed of a decanter centrifuge, the highly concentrated are turned into minerals extractable thin liquid.

Decanter Centrifuge

There are three basic designs of decanter centrifuges. The first one is vertically oriented decanter centrifuge, the second one is horizontally oriented decanter centrifuge and finally the third one is conveyor or scroll decanter centrifuge. In the vertically oriented decanter centrifuges, the fluids or solids are gathered vertically.

Vertical decanter centrifuge is very effective for high temperature and high pressure work. A horizontally oriented decanter centrifuge gathers the fluids or solids generated from high rotation in horizontal orientation. A horizontally oriented decanter is very effective for high pressure works as it provides a strong organization due to its horizontal orientation. Lastly, a conveyor or scroll centrifuge is basically a rotating machine inside a bowl.

The operating and maintaining process of a decanter centrifuge:

The first thing that should be done to maintain a decanter centrifuge is to replace any hydraulic suction filter and replace hydraulic returns filter. It is a very important step for the oil and gas drillers. As when the oil or gas drilling goes on both the hydraulic suction filter and the hydraulic returns filter undergo an extensive pressure.  So, there is a huge possibility of both of them to be worn out. So in that sense, both of the filters must be checked regularly and be replaced when it is necessary.

Another important thing that is required to do in order to maintain a decanter centrifuge is greasing the machine.  It is very important. As decanter centrifuge is basically used in a heavy working areas, the machine can easily be stuck or jammed off. In order to avoid that, greasing is very important. Oil lubricated gear box greasing and recirculating oil greasing are two very effective methods for greasing. A very significant task for managing a decanter centrifuge is adjusting speed sensor to it. It is very important just because adjusting a speed sensor enables drillers to control the differential speed.

Beside these above mentioned activities replacing hydraulic motor sensor, bowl belt replacement, scroll belt replacement and regulating the weir plate are some of the steps that should be taken to maintain a decanter centrifuge.

Advantages of Solid Bowl Decanter Centrifuge

Solid Bowl Decanter Centrifuge is used for chemical and industrial separation applications. The Solid Bowl Decanter Centrifuge is a basic, standard machine to which features can be added for special applications. The solid bowl is ideal for clarification of liquids, thickening of sludges, and separation of solids.

Process advantages of the Solid Bowl Decanter Centrifuge:

1.Process flexibility.

Constant separation results, even at fluctuations in the volumetric flow, the process conditions, or the product characteristics

2.Process conditions

-gas-tight, vapor-tight, or pressurized operation

-low vibration levels

-CIP cleaning

-flameproof or explosion-proof standards making the decanter ideal for applications with solvents and hazardous materials

3.Chemical resistance

Materials such as titanium, pure nickel, or Hastelloy provide the security essential in demanding process applications.

4.Low space requirement

-compact design at high specific throughput

-self-contained system, therefore no extra space required for peripheral equipment

5.Low operating costs

Operating consumables (e.g. filter cloths) are not required. No costly downtime for changing consumables.

6.Simple installation

-integration of all necessary functions in one package (e.g. no need for peripheral equipment)

-active support system (no foundations)

Major applications of Solid Bowl Decanter Centrifuge:

-Organic chemicals

-Inorganic chemicals

-Ores and minerals

-Water and wastewater

To know more about Solid Bowl Decanter Centrifugeplease contact us!

Kosun- Solid Control Company

Used solids control equipment Decanter Centrifuge for Sale

KOSUN Drilling Decanter Centrifuge, also referred to as a brand new type of horizontal decanter centrifuge, is one of the most important solid/liquid separation equipment in a oilfield solids control system. It can integrate each of the working procedures-feeding, centrifugal settling, unloading, and so on. Not to mention it truly is utilized for removing fine solids, recovering barites, lowering the solids content controlling the density and viscosity associated with the drilling flare ignition device to assure the fluids’ efficiency and also boost the drilling efficiency.

decanter centrifuge for sale

KOSUN decanter centrifuge is used in separating suspension of solid phase with particle diameter d≥2μm for drilling mud and fluids handling. Ruggedly built for oilfield and industrial services, it is especially effective in environmentally sensitive areas. It delivers high fluid-recovery rates and efficient solids control to significantly reduce the costs of makeup fluids and disposal. The decanter centrifuge is precision –balanced for smooth operation over long periods at speeds of 0 to 3900 RPM, generating centrifugal forces up to 3000G’s.

As a solids control equipment 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, mud tank, diesel tank, water tank, complete solids control system, etc.

Since its establishment in 1992, KOSUN has been the major solids control equipment supplier in the world. The products provided by KOSUN are extensively used in oil & gas drilling and workover, coalbed methane drilling, shale gas drilling, water well, geothermal well drilling, trenchless horizontal directional crossing projects, mine gravel staged treatment, tailings treatment, rive dredging works, municipal environment-friendly sewage treatment, industrial wastewater treatment, fruit juice purification, waste oil recovery and purification treatment, etc.

To know more about used solids control equipment Decanter Centrifuge, please contact us!
Kosun- Solid Control Company

The Operation of a Decanter Centrifuge

The operation of a decanter centrifuge can be either batch or continuous and is not altogether dissimilar to other types of centrifuges. A metal or plastic cylinder fixed along a central axis houses the materials or solutions to be sorted. When a motor engages the axis perpendicular to this, it creates a rotational movement capable of creating gravitational pulls up to twenty thousand times that of normal gravity. This causes larger particles to separate out first in a radial direction allowing them to move toward the bottom of the cylinder while lighter materials move toward the top.

Decanter Centrifuge

In some decanter centrifuges a mesh is used to collect solids with liquids passing through to the outer area of the cylinder before being drained. In other models a helical extraction screw directs solids to one end and liquids to the other. If high enough acceleration is reached, the solids may even become compressed for easy removal. Both new and used centrifuges are available to purchase. As adjustable and fixed acceleration models are widely available, it is important to consider the parameters of a specific application before purchasing a decanter centrifuge. Capacity should also be considered with regard to the intended use as should the design and material construct of a decanter centrifuge as these materials must be compatible with both process liquids and solids to be sorted.

Decanter centrifuges utilize centrifugal force to speed the dewatering or thickening of slurries and suspensions in many industrial and commercial applications. While these centrifuges, like others, may also be used to separate liquids from liquids, they are more applicable in situations that require the separation of liquids from appreciable amounts of suspended solids.

Food and beverage, water treatment, oil, gas and pharmaceutical industries commonly employ decanter centrifuges for the classification of solids based on the sedimentation principle as well as the clarification of fluids resulting from the settling out of debris. Other industrial uses for decantation include solids recovery which enables many manufacturing facilities to recover and reuse valuable materials that would otherwise be disposed of along with wastewater.

While gravity alone is sometimes used, decanter centrifuges are essential in applications where the density difference of elements within a heterogeneous mixture is too small or the particles themselves are too small. Whereas normal gravity could take ages to sort these materials, the centrifugal force generated by industrial centrifuges speeds the process while producing drier solids. Dryness is important as both dewatering and drying materials helps to provide raw or processed substances that are lighter in weight than their immersed counterparts making for easier handling and lower transportation costs.

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

Brief description of Decanter Centrifuge

A decanter centrifuge is a device that can create a very fast rotation. A decanter centrifuge is basically used to dilute the fluid that is extracted from the gas or oil mine. Generally, the liquid that is extracted from a mine is of highly concentrated and coagulated. So, extracting minerals from them is practically impossible.  In order to thin up the extracted fluids. By using the rotational speed of a decanter centrifuge, the highly concentrated are turned into minerals extractable thin liquid. There are three basic designs of decanter centrifuges.

Decanter Centrifuge
Decanter Centrifuge

The first one is vertically oriented decanter centrifuge, the second one is horizontally oriented decanter centrifuge and finally the third one is conveyor or scroll decanter centrifuge. In the vertically oriented decanter centrifuges, the fluids or solids are gathered vertically. Vertical decanter centrifuge isvery effective for high temperature and high pressure work. A horizontally oriented decanter centrifuge gathers the fluids or solids generated from high rotation in horizontal orientation. A horizontally oriented decanter is very effective for high pressure works as it provides a strong organization due to its horizontal orientation. Lastly, a conveyor or scroll centrifuge is basically a rotating machine inside a bowl.

How does a decanter centrifuge work?

As it is mentioned before the process of a decanter centrifuge is a bit complex. Usually, a decanter centrifuge depends on sedimentation, differential speed and G force to perform its job. The sedimentation rate is an important feature for the centrifugal process. If the G force or centrifugal force is very high, the separation process becomes very easy and effective. The size and shape of particles and their level of concentration determine the sedimentation rate of any decanter centrifuge. The sedimentation rate also depends on the centrifugal force.

Another important issue for the functionality of a decanter centrifuge is the differential speeds. In a centrifuge two different parts rotate simultaneously. The first part that rotates is the exterior bowl and the second part that rotates is scroll conveyor. Sedimentation is gathered in the centrifugal cylinder as the result of varying speed of the two above mentioned separate parts. If the differential speed of a decanter centrifuge is too high, a little time is required to loosen up the concentration of waste fluids. So, it is very important to keep the differential speed of a decanter centrifuge minimal. Thus, a decanter centrifuge operates its functionalities. (Editor:Kosun Lily.Wang)