Decanter Centrifuges
Most industrial processes need separation of liquids from each
other or liquids from solids. Valutech offers a complete range of
separation equipment from Alfa Laval, the world leaders
in this technology.
The working principle of decanters is based on sedimentation or
settling process. Mere settling by gravity is an extremely slow
and uncontrolled process. A decanter provides continuous mechanical
separation of liquids from solids. Instead of using the force of
gravity for separation, centrifugal force, which can be up to 4000
times greater, is used. A wide range of different solids can be
separated from one or two liquid phases continuously.
The Working Principle
The centrifugal force presses the solid particles outside against
a rotating bowl, while the less dense liquid phase forms a concentric
inner layer. The solid particles are continuously removed by a screw
conveyor, which rotates at a different speed than the bowl. The
solids are compacted and discharged from the bowl. Baffles in the
centrifuge casing channel the separate phases into the correct flow
path. The speed of the screw conveyor can be automatically adjusted
by use of a variable frequency motor to adjust the variation of
the solids load.
The decanter is divided into four sections:
- Inlet Section - where the feed enters the decanter
- Screw Conveyor - which conveys and separates the solid
phase from the
- Solids Discharge Section - from where the solid "cakes"
exit the unit
- Liquid Discharge Section - from where the liquid is discharged.
What's Special about our Decanters?
Alfa Laval decanters perform exceptionally well in separating solids
from liquids in a controlled, efficient and continuous process.
They are highly reliable. Capital cost, compared to the capacity
of separation, is extremely attractive. Maintenance cost is low.
These machines can handle a wide range of solid particles with diameters
from 5 mm to a few microns. A special feature of our decanters is
the ability to handle slurries with solid content from as low as
0.1% to more than 65%. The ability to accept variations in the feed
more effectively is another special feature of our decanters
Where are our decanters used?
Chemical Industry:
Acids, fertilizers, bleaching agents, organic intermediates
Petrochemical Industry:
Oil refineries, lubricating oil additives, waste oil stream recycling
Ethanol production:
Processing of grain alcohol spent wash, molasses fermenter residues
Waste recycling: Recovery and recycling of wastes
Food Industry: Dairy, Edible oil, Juice, Wine, Animal protein
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