Back-Drive Decanter Centrifuge with Adjustable Differential Speed for Precision

Back-Drive Decanter Centrifuge with Adjustable Differential Speed for Precision

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

DAGYEE LW horizontal decanter centrifuge features continuous feeding and discharging, and is applicable for two-phase (solid-liquid) and three-phase (solid-liquid-liquid) slurries separations.

How does a decanter centrifuge work?

The horizontal decanter centrifuge mainly consists of a drum, screw, differential, etc. The drum rotates at high speed, and the screw rotates in the same direction but at a slightly lower speed. The structure of the horizontal decanter centrifuge is as follows:

Drum: Achieves ideal settlement separation through high-speed rotation.
Screw: Conveys and compacts sludge.
Differential: Generates speed difference between the drum and screw.
Clear Liquid Outlet: Recovers liquid phase, i.e., clear liquid, through overflow.
Sludge Discharge Outlet: Recovers solid phase, i.e., sludge, through gravity.

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. Fully automated operation, meaning less operator intervention required
2. Lower volume cake, reducing storage area/transport requirements
3. Enclosed operation for cleaner/ less housekeeping
4. Less sensitivity to changing feed characteristics, meaning less adjustment
5. Longer maintenance intervals (belt filters can require frequent replacement)
6. No requirement for continuous wash water, so less water is required
7. Simple, heavy-duty construction

Decanter centrifuge key features

1. Efficiently separate liquids and solids
2. Reduce waste
3. Lower production costs
4. Maximize production capacities
5. Protect people and the environment
6. Recover valuable minerals

Decanter centrifuge applications

1. Industrial and municipal wastewater treatment
2. Oil & gas drilling mud/fluid control
3. Washing, separation and dewatering of starch
4. Mycelium and zymotic fluid separation for antibiotic
5. Dewatering of soybean and wheat protein
6. Dewatering of fish power and fish meat
7. Dewatering of vinasse
8. Clarification and extraction of fruit juice
9. Separation and purification for animal and vegetable oil
10. Production and purification of olive oil, palm oil, avocado oil
11. Separation and purification for coal tar
12. Grading of kaolin and graphite
13. Grading and dewatering of dyestuff and pigment
14. Froth flotation for cleaned coal and dewatering of coal mud
15. Grading and dewatering of minerals