Decanter Centrifuge

Decanter Centrifuge

Decanter centrifuge is a horizontal solid bowl centrifuge with scroll conveyor inside. Our purpose designed drilling mud decanter centrifuge comes with high wear-resisting and excellent  corrosion-resistant performance. They are commonly used as oilfield solids control equipment for barite recovery and ultra fine solids removal. In closed loop mud system, the decanter performs as an efficient sludge dewatering centrifuge following chemical flocculation process  with automatic dosing system. VFD decanter centrifuges are often chosen to reclaim water and/or oil from drill cuttings in drilling waste management system.


Decanter Centrifuges for oilfield applications are often introduced to deal with drilling mud within active solids control system or waste effluent of drill cuttings. With middle speed decanter in operation, barite can be recovered and high speed decanter for the removal of undesired ultra fine solids.
Our purpose-built oilfield decanters are abrasion resistance, combine long life with capacity and performance, require less maintenance time and reduce down time.
Top rated explosion proof motors with approvals of IEC Ex, ATEX, UL for option for hazardous area, wired with 460V / 60Hz, 380V / 50Hz.


Solid liquid separation horizontal decanting centrifuge (Decanter Centrifuge for short), one of key machines for solid liquid separation, separates suspension liquid for two or three (multiple) phase materials in different specific weights by centrifugal settling principle, especially clarifies liquids containing suspended solid.

Such centrifuge applies to solid liquid separation of suspension liquids with solid phase particle equivalent diameter ≥ 3μm, weight concentration ratio ≤10%, volume concentration ratio ≤70% or solid liquid density difference ≥0.05g/cm . HSS has different series of decanter centrifuges with bowl diameter from 220 ~ 1100mm. The machine can be also sorted by bowl type, such as thickening, dewatering, classifying, clarifying etc., to be fit for different separations.

Decanting Centrifuge Specifications

Model Max Capacity
Solids Discharge
Motor (kW) Weight (KG) Dimensions (mm)
LW220 5 0.4 <17 760 1600×1100×850
LW300 15 0.8 <23 1500 2470×1230×850
LW350 20 1.2 <30 2000 2790×1300×880
LW400 30 2 <38 2600 2950×1400×850
LW450 45 2.5 <48 3200 3300×1500×920
LW530 80 5 <66 5200 3730×1600×1100
LW580 90 8 <97 7000 4000×1400×1600
LW650 100 13 <120 8500 4300×1900×1350
LW760 150 21 <165 15000 5000×2500×1500
LW900 240 35 <220 20000 6500×2700×1500
LW1100 400 64 <300 25000 7000×3000×1700
Notes: The actual processing capacity depends on the particle size and the specific application.
Decanting Centrifuge Sample

Decanter Drive Combine Sample


Working Principle of Decanting Centrifuge

High dryness decanter can use limit space to fit together different stages of separation. 
Sludge and chemical mixes in the specially designed feed chamber and accelerates together. This prepares the sludge for best separation.
The flocculants sediments inside the bowl under centrifugal force, the clear liquid flows out of the weir at the end of the bowl. 
Conveyor pushes the solid toward the discharge end. The sludge is further pressed by centrifugal force and the water comes out of the small holes of the sludge. 
In the conical part of the bowl wall, the sludge is pressed by specially designed double direction pressing effect. The specially designed conveyor produces axial pressing force and water comes out of the tiny holes of the sludge. 
In order to achieve best dewatering effect when flow rate or character of sludge changes, the solid content inside the bowl should be continuously controlled. This is controlled by the drive system of the conveyor. The drive system of the conveyor can measure real-me the solid content inside the bowl and adjust automatically, solid discharge torque automatically compensated. 
The reliable and excellent operation needs good cooperation of bowl drive and conveyor drive. Shanghai Centrifuge Institute researches good drive combination, which can be recommended as best design to suit different applications. 
Alternatives includes: AC Motor + Frequency Converter AC Motor + Hydraulic Coupling Other Special Ways 
Alternatives includes: Frequency converter back or forward drive DVF multi-level planet control Hydraulic motor with individual hydraulic pump Other Special Ways
AC Motor + Hydraulic Coupling Hydraulic motor with individual hydraulic pump AC Motor Frequency Converter AC trig Motor Frequency Converter AC Frequency equipment.
centrifuge applications

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