Two-Phase Decanter Centrifuge for Efficient Liquid-Solid Separation

Two-Phase Decanter Centrifuge for Efficient Liquid-Solid Separation

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, also known as Solid Bowl Centrifuges or Horizontal Bowl Centrifuges, are a type of mechanical dewatering equipment designed to continuously separate solids from liquid in a slurry using centrifugal force at high G’s.

How does a decanter centrifuge work?

The horizontal decanter centrifuge utilizes the difference in solid-liquid specific gravity and the action of centrifugal force to achieve solid-liquid separation. The working process is as follows:

The continuous suspension flows into the drum through the feed pipe (hollow shaft), and it is immediately thrown into the drum chamber. The high-speed rotation of the drum generates a strong centrifugal force. Solid particles (sludge) adhere to the inner wall of the drum due to the centrifugal force and continuously accumulate, forming a solid layer in a ring shape, also known as the solid ring layer.
Water in the liquid phase also forms a liquid layer due to the action of centrifugal force, but because its density is lower than that of solid particles, the centrifugal force acting on it is smaller than that on solid particles. It is located on the inner side of the solid ring layer and is called the liquid ring layer.
Utilizing the relative movement generated by the speed difference between the drum and the screw, the solid ring layer is pushed to the conical end of the drum. Sludge continuously discharges from the discharge outlet at the cone end. The liquid ring layer turns to the large end of the drum, and an overflow port is distributed at the large end. Liquid overflows from the overflow port, and the separated liquid (clear liquid) is discharged through the liquid discharge port.

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. Easy to operate
2. Small footprint
3. Low cake moisture
4. High removal of solids
5. Long service life
6. Large capacity
7. Fully automated

Decanter centrifuge key features

1. Available in 2-Phase and 3-Phase design configurations for separation of liquid/solids or liquid/liquid/solids
2. The dedicated electronic DPC (Decanter Process Controller) automatically manages the process cycle and safely controls the machine while maximizing the process potential of the DR Decanter
3. Replaceable solid discharge erosion resistant wear bushings are easily accessible given the unique rotating assembly cover design simplifying maintenance and reducing downtime
4. Adjustable Liquid discharge level plates are easily accessible and adjusted due to the unique rotating assembly cover design simplifying maintenance and reducing downtime
5. A unique sludge discharge cover scraper assembly prevents sludge from accumulating on the inside of the cover and blocking the solid discharge of the machine
6. Hydraulic and electric scroll back-drive transmission group options including an energy recovery system during machine operation which reduces the energy consumption of the DR Decanter

Decanter centrifuge applications

Chemical Industry: Used for separating suspensions, crystallized substances, etc., to improve product purity.
Food Industry: Used for juice clarification, oil separation, etc., to ensure food safety.
Pharmaceutical Industry: Used for drug extraction, cell separation, etc., to meet high cleanliness requirements.
Environmental Protection Industry: Used for sludge dewatering, wastewater treatment, etc., to promote resource recovery.
Mining Industry: Used for mineral separation, tailings treatment, etc., to improve resource utilization.