Decanting centrifuges
Decanting centrifuges separate solid and suspended particles from liquids. Wide spectrum of applications – municipal and industrial sludge, food industry, chemical industry, agriculture.
Tecnical description
Centrifuge main components are two coaxial, conical-cylindrical bowls having a corresponding sense of rotation but a different speed. On the inner bowl-conveyor a double threaded screw is welded. The outer bowl is made of stainless steel.
Both bowls are supported on rolling bearings in bearing pedestals. These are located on a base frame welded of rolled profiles.
The drive of both bowls is carried out by an electric motor via a special gear-box providing a different speed of the bowls or by three-phase motors for bowl and conveyor controlled by frequency convertors. The gear-box includes an overload slip coupling securing machine shut down in case of overloading. Centrifuge rotating components are protected with covers during operation. The equipment includes a distribution box where control and protection elements are located.
Technical parameters
| Type | DO 250 | DO 360 | DO 450 |
| Conveyor diameter (mm) | 250 | 360 | 450 |
| Electric motor (kW) | 12 | 15 | 20 |
| Maximum speed (min-1) | 4100 | 3300 | 3000 |
| Weight (kg) | 860 | 1620 | 2230 |
| Flow rate (m3/hour) | 1 ÷ 3 | 3 ÷ 8 | 7 ÷ 15 |
| Dimensions - LxWxH (mm) | 2375x600x1370 | 2915x1150x700 | 31505x1100x913 |
Centrifuge operation
The slurry is introduced into the revolving bowl of centrifuge through a stationary feed tube at the center of rotation. By the effect of tremendous centrifugal force heavier particles sediment on the bowl surface from where they are continuously conveyed by a conveyor to the bowl conical part. The thickened sediment is discharged – by conveyor – to the centrifuge discharge part from where it falls out through the outlet branch to a space under the centrifuge.
The continuously supplied suspension squeezes out the liquid centrifuged which overflows via adjustable plate dams on the face of the bowl. The liquid is accumulated in an effluent discharge from it is drained by a piping out of the centrifuge.
By a special internal arrangement it is possible in decanting centrifuge to achieve separation of two liquids mutually unmixable (e.g. water + oil) and one solid phase (solid particles contained in these liquids).
Applications
- Sludge dewatering and thickening – municipal waste water treatment plants
- Sludge dewatering – vegetable and potato processing
- Processing sludge from meat-packing plants
- Carcass disposal plants (fat centrifugation)
- Stillage dewatering
- Sodium water-glass decantation
- Soya milk processing
- Mica particle separation
- Separation of chemical compounds
- Oil product processing
Mobile dewatering device
| Trailer | up to 2.5 t |
| Centrifuge DO 250 | 1 ÷ 3 m3/hour |
| Distribution box | |
| Chemical system | |
| Sludge pump | 1 ÷ 3 m3/hour |
| Screw conveyor |
Usage
- Optimum solution to dewater sludge from wastewater treatment plants with the capacity 1 500 ÷ 5 000 of equivalent population
- Convenient solution for associations of municipalities
- Tests of sludge dewaterability
- Solves one-off operating needs of customers
- Possibility of a long-term lease
- Simple operation
- Ready to operate
A mobile centrifuge for field tests. It can be also rented to meet short-time or one-time operating requirements.
Proposal of a technical solution
We will propose an appropriate technical solution of the machine depending on specific operating requirements and tests carried out with our mobile device.
Service
- Technical assistance
- Diagnostics
- Repair directly at the customer
- Repair in specialized shops of our plant