Three-Phase Decanter Centrifuge for Simultaneous Separation of Two Liquids and Solids

Three-Phase Decanter Centrifuge for Simultaneous Separation of Two Liquids and Solids

Product Item : DLW
Category： Decanter Centrifuge
Certification:CE Certificate
Core Components: PLC, Engine, Bearing, Motor, Gear
Keyword: calcium hypochlorite separation
Description: Solid-liquid Separation Machine
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Decanter centrifuge descriptions

A horizontal decanter centrifuge is a type of centrifuge used for separating solids from liquids in a continuous process.

How does a decanter centrifuge work?

Slurries may be separated into solid and liquid phases by a process known as sedimentation, where gravity forces cause the heavier solid particles to settle out from the less dense liquid. The rate of sedimentation can be greatly increased by Decanter Centrifuges, which use centrifugal sedimentation to continuously separate slurries quickly and effectively.

The slurry is fed, along with polymer to aid in sedimentation, into the inside of a helical screw conveyor that is fitted inside and closely conforming to a bowl that rotates at high speed. A gearbox rotates the conveyor at a slightly lower speed than the bowl. The slurry emerges into the region between the conveyor and the bowl through feed ports cut through the conveyor.

Centrifugal forces cause the solid particles to sediment outward toward the inside surface of the bowl, while the lighter liquids float on the inside of this solids cake. The conveyor pushes the sedimented solids toward one end of the bowl, while the liquid flows freely toward the other end.

At the solids discharge end, the bowl and conveyor are conically tapered inward so that the conveyor lifts the solids out of the pool of liquid and ejects them out of the bowl through the radial discharge ports, while still retaining the liquid. The liquid exits the bowl from ports with adjustable weirs at the other end of the machine.

The solids and liquid ejected from the bowl discharge ports are collected into a stationary casing, which incorporates baffle plates to prevent remixing. Discharge chutes or hoppers are attached under the casing to collect the separated material. The solids are usually collected on a conveyor, and the liquid is piped away.

Decanter centrifuge advanced operation capabilities

Clarification

Clarification removes suspended solids from a liquid of lower density across a particle size range from 1 to 10,000 microns. By increasing centrifugal force, even submicron particles can be separated, making this process ideal for high-purity applications in chemicals, mining, and waste management.
Classifying
Through controlled reduction of residence time, the decanter achieves sharp separation cuts for particle-size classification down to the submicron range. This capability is essential for processes requiring precise particle distribution and custom engineering solutions.
Liquid/liquid separation
The efficiently separates immiscible liquid phases of different densities, with or without solids present. This is critical for oil recovery and industrial wastewater treatment, where mechanical dewatering and centrifugal separation reduce reprocessing and disposal costs.
Thickening
Fine solids separated from the liquid can be thickened in a hindered settling mode, utilizing the cylindrical section of the bowl for maximum compression. This improves solids handling and reduces downstream load, contributing to operational efficiency.
Compression and dewatering
Compactive dewatering combines drainage and compression to achieve a higher degree of dryness, even with compressible solids. The degree of dewatering depends on solids characteristics, machine settings, and required dryness levels. Optimized conveyor and cone geometry, along with differential speed control, ensure stable discharge of pasty or shear-sensitive solids—key for waste management and cost reduction.
Counter-current washing
Integrated washing systems allow efficient, cost-effective removal of contaminants by separate discharge of wash liquor over multiple sections. This reduces chemical and water consumption, aligning with sustainability and process optimization goals.
Mixing and re-suspension
Special discharge geometries enable solids to be mixed with liquid directly at the outlet, eliminating the need for additional mixing vessels. This feature simplifies plant design and enhances operational efficiency.
Automation and innovation
Control systems for smart operation
Control systems stabilize separation quality, automate setpoints, and provide diagnostics that support predictive service strategies. As the “brain” behind the process, strengthens industrial automation and helps maintain equipment reliability through better visibility, alarms, and optimization tools.
Engineered for tough conditions
A broad choice of materials of construction, wear protection, and sealing options extends service life in abrasive or corrosive duties. Features like CIP, optimized bearings and seals, and gas-tight/pressurized casings are designed to lower maintenance effort while keeping performance high.
Options that boost performance
Depending on application, It can be equipped with energy-recovery weir plates, specialized feed systems to reduce particle breakage, and multiple drive/gearbox configurations—each selected to match duty conditions and performance targets.

Decanter centrifuge specifications

1. All contact parts can be made by SS304/SS316L/Duplex Steel 2205.
2. Automatic adjustment of differential speed via VFD,Siemens PLC Spiral.
3. Two motor drive.
4. Approximately 80 to 90% of the oil is recovered.
5. Low labor costs due to continuous and automatic operation.
6. Highest g-force for higher solids output.
7. Belts for both primary motor and secondary.
8. NSK/SKF Bearing.

Model	Drum diameter mm	Length mm	Maximum speed rpm	Highest separation factor g	Mixture capacity m³/h
LW250-900	250	900	5000	3500	0.5-3
LW350-1500	350	1500	3800	2850	1-5
LW400-1200	400	1200	3400	2581	1-8
LW400-1600	400	1600	3400	2581	2-10
LW400-1800	400	1800	3400	2581	2-12
LW450-1800	450	1800	3200	2572	5-20
LW450-2000	450	2000	3200	2572	5-25
LW530-2280	530	2280	2800	2350	10-50
LW600-2400	600	2400	2600	2265	15-65
LW650-2600	650	2600	2400	2100	20-80
LW720-2500	720	2500	2200	1950	25-90
LW800-2560	800	2560	2000	1800	30-100
LW800-3200	800	3200	2000	1800	30-110
LW900-3200	800	3200	1800	1650	30-150

Why choose the DAGYEE decanter centrifuge?/Decanter centrifuge advantages

Screw decanter centrifuges offer several benefits in various industrial applications. Here are some of the key advantages:
Efficient solid-liquid separation
Screw decanter centrifuges are highly effective at separating solid particles from liquids. They can handle a wide range of solid concentrations and particle sizes, making them versatile for different applications. The centrifugal force generated by the high-speed rotation allows for efficient sedimentation and dewatering of solids.
Continuous operation
These centrifuges are designed for continuous operation, which means they can handle a continuous feed stream and produce a continuous discharge of separated solids and liquid. This feature makes them suitable for industrial processes that require uninterrupted operation.
High throughput
Screw decanter centrifuges typically have high processing capacities, allowing for large volumes of feed to be processed within a relatively short time. This high throughput makes them suitable for applications where a significant amount of solids needs to be separated from liquids.
Versatility
These centrifuges can handle a wide range of applications across various industries. They are commonly used in wastewater treatment, chemical processing, food and beverage production, pharmaceuticals, mining, and many other sectors. The ability to handle different types of fluids and solids makes them adaptable to different process requirements.
Dewatering capability
Screw decanter centrifuges excel at dewatering solid materials. By compressing and conveying the settled solids along the length of the centrifuge, they can effectively remove excess liquid, resulting in drier and more concentrated solids. This dewatering capability is beneficial for waste management, sludge treatment, and other applications where reducing moisture content is essential.
Lower energy consumption
Compared to other solid-liquid separation methods, such as filter presses or belt filters, screw decanter centrifuges often have lower energy consumption. They require less power to achieve the desired separation efficiency, making them energy-efficient and cost-effective over the long term.
Reduced footprint
The centrifuges typically has a compact design, requiring less floor space compared to other separation equipment. This is advantageous in facilities where space is limited or needs to be optimized.

Decanter centrifuge key features

DAGYEE Decanter Centrifuges are available in a range of sizes and capacities to suit a variety of materials in many different applications. They offer high separation of solids and liquids producing a low moisture content solids discharge between that achieved by a Thickener and a Filter Press. The liquid recovered can be recycled back into the process reducing overall demand.

Decanter Centrifuges from DAGYEE can be used for solids recovery to capture valuable products from a liquid stream or to reduce the volume of material reporting to settling ponds, reducing the size requirements for the ponds or eliminating the need for them altogether. In this regard, DAGYEE Decanter Centrifuges offer a sustainable solution to pond reduction/elimination and water recovery in areas where water is scarce, or expensive, or space for traditional settling lagoons is not available or at a premium. This may also help with environmental permitting and regulations.

DAGYEE Decanter Centrifuges are compact, easy to operate and have a small footprint. They offer long service life with minimal maintenance requirements.

Decanter centrifuge applications

As the main equipment in the field of solid-liquid separation, the decanter centrifuge has become an indispensable technical equipment in industries such as sewage treatment, oilfield development, food manufacturing, and chemical and pharmaceutical industries due to its high efficiency, stability, and environmental protection. With the continuous innovation of separation technology and the continuous upgrading of material processes, the decanter centrifuge will continue to expand its application boundaries and provide strong support for more industries to achieve efficient resource utilization and clean production.