Stainless Steel Decanter Centrifuge - Continuous Sludge Dewatering System

Stainless Steel Decanter Centrifuge - Continuous Sludge Dewatering System

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

Decanter centrifuges support solid-liquid separation in a seamless, continuous process. Stand out from the competition with high-performance separation that delivers clarified or extracted products of exceptional quality and superior commercial value. Recover valuable raw materials, reduce energy consumption, and lower your environmental footprint and waste management costs—always backed by service expertise for optimal performance and long-term reliability of your decanter separator.

How does a decanter centrifuge work?

The separation of a solid and liquid(s) in a decanter centrifuge system work on the principle of gravitational forces. Whereas it takes considerable time for the gravitational separation of a muddy mixture (to fall to the bottom) and water (to rise to the top) in separation technologies based on 1xG separation such as,a static container, clarifier or lamal separator, the rapid rotation of a centrifuge greatly speeds up this gravitational principle.

In fact, the G-force generated by a decanter centrifuge can be well in excess of three-thousand times greater than gravity reducing the separation process from hours to mere seconds. Today's centrifuges are a counter-current type technology. The separation process in a 2-phase decanter centrifuge results in the denser solid particles to be compacted and settled out in the inner drum and then transported and removed via solids discharge end of the decanter. The centrate is routed to the opposite end of the centrifuge and removed via the centrate outlet. In a 3-phase centrifuge, the baffle system is built inside the centrifuge. The baffle system blocks the oil from being discharged with the water. The oil (the lighter phase fluid) is collected between the two baffles and skimmed off the top.

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

1. High-performance separation, resulting in high-value products and low waste management costs
2. Low energy consumption and carbon footprints
3. Low maintenance costs thanks to continuous operation, high-grade machine materials, smart design and well-thought preventive services
4. Low capital cost/capacity ratio

Decanter centrifuge key features

Our decanter centrifuges separate fine solids from a suspension and optimally clarify the separated liquid. The Simp Drive concept and the adjustable impeller make it possible to adjust the residence time of the mixture in the decanter bowl during operation. If the conditions at the inlet change, the separation result and solids content in the discharge always remain constant. Custom-made decanter centrifuge solutions for the individual processes of our customers This is the only way to achieve optimum separation results.
Separation of the finest solids from a suspension for an optimally clarified liquid phase (centrate)
Consistent separation results, thanks to automatically regulated differential speed and adjustable impeller
Custom-made solutions for the individual processes of our customers

Mechanical separation of liquids and solids with decanter centrifuges requires high forces. Abrasive materials or media with corrosive properties cause wear, abrasion and erosion. Flottweg offers a wide range of wear protection measures – always adapted to your application.
For all decanter components in contact with the product, Flottweg exclusively uses high-quality corrosion and acid resistant stainless steels. In addition there is a quality made in Germany. This makes our centrifuges particularly durable.
Depending on the requirements of our customers, we equip the decanter centrifuges with different lubrication systems. All lubrication systems allow the rotor bearings to be relubricated during operation.
The elimination of consumables (such as filter cloths and filter aids) additionally reduce maintenance and operating costs of our decanter centrifuges.
Costs are reduced because only wear parts are replaced
There are no consumables such as filter cloths, filter aids, etc.
Longer service life of the decanter
Various lubrication systems, e.g. automatic oil-air lubrication system for minimum oil consumption

Decanter centrifuge applications

Biotech and Pharmaceuticals
Chemicals
Energy and Utilities
Food and Beverage
Mining and Minerals, Pigment
Pulp and Paper
Steel
Water and Waste treatment