Continuous Solid-Liquid Separation
Solids are continuously separated from the liquid phase by the application of centrifugal force ranging up to 3000 times the force of gravity, efficiently and economically. A characteristic feature of the Pennwalt Super-D-Canter Centrifuge is the cylindro-conical bowl containing within a helical/quasi-axial screw conveyor of matching profile that rotates in the same direction but at a slightly slower speed with respect to the bowl.
Extremely flexible Separations Tool
Wide ranging, process specific applications of Pennwalt Super-D-Canter Centrifuge encompass:
For a detailed list of applications where the Pennwalt Super-D-Canter Centrifuge has been successfully used click here
Pennwalt Super-D-Canter Centrifuge has polymiser features, wherein the feed zone & conveyor flights are modified to reduce the floc breakage and minimise conveyor turbulence in the pool. These features result in considerably reduced dose of polymeric flocculants. In addition there is a substantial economy of space, power and labour required in the operation of the Pennwalt Super-D-Canter Centrifuge in comparison with alternative solid-liquid separations equipment.
Stainless Steel Construction designed to resist corrosion
Carbon Steel corrodes, leading to unbalance, high maintenance costs, long downtimes. Therefore the principle elements and stressed rotating components of Pennwalt Super-D-Canter Centrifuge are machined from quality centrifugally cast Stainless Steel.
Designed to resist abrasion
Sintered Tungsten Carbide Tiles positioned on the flights of the Pennwalt Super-D-Canter Centrifuge scroll (conveyor) outlast conventional hard surfacing systems many times over in any environment.
This makes slimy and gelatinous sludges SCROLLABLE. The BD feature allows the Super-D-Canter to operate at Ultra-Deep pond settings that compact the solids and creates hydrodynamic buoyancy that assists the scrolling and the discharge of slimy sludge. The insoluble solid contents are typically 1/2% - 2% in the feed slurry which are thickened to 6%-12% and discharged in the slimy cake.
For Pharmaceutical, Biotechnology and Food Industries, the Pennwalt Super-D-Canter Centrifuge can be provided with Sterilisation-in-place (SIP) and Clean-in-Place (CIP) features.
- All electric drives are provided with enclosures of Ingress Protection (IP) ratings selected for safe operation as per process requirements.
- The Pennwalt Super-D-Canter centrifuges are designed and featured for operational safety with Inert Gas (N2) purging to be provided by the end use customer, when operated with feed slurry containing a flammable and/or explosive solids or liquid phase.
Four crucial factors govern the separational performance of Pennwalt Super-D-Canter centrifuges.
- Centrifugal force required to sediment the solids.
- Appropriate setting of the pool depth to achieve the required centrate liquid clarity.
- Control of differential speed between the bowl and scroll, to convey the solids and obtain appropriately low cake moistures.
- Hydrodynamic design of the conveyor to minimise turbulence.
In specifying a Super-D-Canter centrifuge, for a particular application, Pennwalt also considers other design features such as:
- The pitch of the conveyor flights.
- Number of Leads of the Conveyor.
- Special Rinse or Floc Feature.
- Feed zone design.
- Beach angle.
- Beach Internal Surface Profile.
- Bowl Internal Surface Profile.
- Torque Sensing and Over-load Protection.
- Back-Drive or Eddy Current Brake for control of Differential Speed.
- Casing Enclosure design.
- Abrasion Protection with Tungsten Carbide Tiles or Stellite Hard Surfacing of the Conveyor.
- Material of construction.
- Sedimentation enhancing features and choice of polyelectrolyte flocculants.
- Safety Featured casing and guards.
The correct combination of such features ensures the desired separational performance with operational safety for a given application at minimum cost. Operation at High 'G' force is an inherent design feature of the Pennwalt Super-D-Canter and provides flexibility to the user. The centrifuge can be operated at an optimum speed to suit the particular application. The Pennwalt Super-D-Canter can be operated at low, intermediate or high speed without the constraints of mechanical design, which can be optimised and tailored to suit each application.
ADVANTAGES OF PENNWALT SUPER-D-CANTER
- Reduces Total disposal volume substantially
- Saves space due to small foot print
- Saves power in comparison with filtration equipment
- Reduces handling costs
- Produces Truckable cake solids discharge
- Totally enclosed casing for odour minimisation and solvent loss minimisation
- Automated Decanter Operation
- Continuous Operation
- Tailored to application specific requirements