Compact Decanter Centrifuge for Small-Scale Water Treatment Facilities

Compact Decanter Centrifuge for Small-Scale Water Treatment Facilities

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

When solid/liquid mixtures with a high portion of solids need to be separated, decanter centrifuges are the solution of choice. In contrast to chamber filter presses, these solid shell scroll centrifuges or decanters operate continuously. High centrifugal forces separate the finely distributed solid particles from the suspension.

The modular design of our decanters makes them useful in a wide variety of industries throughout the world – from Australia to Zambia. The centrifuges are adapted optimally to the specific application. Applications range from sludge dewatering to classification or wet classification to the sorting of solids.

How does a decanter centrifuge work?

A decanter is just a sedimentation tank wrapped around an axis. Solid particles that are heavier than liquid move to the bottom of the sedimentation tank by gravity and form a sediment (solid phase) at the bottom. A wine decanter, for example, can be thought of as a sediment vessel. The solid and liquid phases of a centrifuge are separated by centrifugal acceleration. The solid particles, which have a higher density and are hence heavier than the liquid, migrate outwards in the centrifuge’s revolving bowl due to centrifugal force. The sediment forms on the inside of the centrifuge bowl’s inner wall. The separation of solid particles from liquid is more faster and more efficient in a centrifuge because centrifugal forces of roughly 3000 g are applied instead of 1 g in a gravitational field.

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

Decanter centrifuge is widely used in the field of solid-liquid separation. The root of its success lies in its multiple advantages:

Continuous and automated operation
Traditional separation methods such as filter pressing and natural sedimentation require intermittent operation, while decanter centrifuge can achieve continuous and uninterrupted operation, greatly improving production efficiency.

High-efficiency separation capacity
With the help of high-speed centrifugal force field, it can achieve difficult separation tasks with solid content as low as 0.1% and particle size as small as 1μm.

Closed structure, environmentally friendly and clean
The entire treatment process is completed in a closed environment, without odor or dust, in line with current environmental protection regulations.

Energy saving and consumption reduction
Modern decanter centrifuges are equipped with frequency converters and intelligent speed control systems, which can automatically adjust power according to load, saving energy significantly.

Modular design and easy maintenance

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.