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Stnx - decanter centrifuge0 pages
Applications
Alfa Laval STNX decanter centrifuges are used for a wide
range of different starch processing operations. These include
dewatering heat-coagulated potato protein and maize gluten,
2-phase and 3-phase wheat starch and protein splitting, and
fruit juice separation and fibre dewatering in the potato and
tapioca starch industries.
The STNX range provides the starch industry with the most
cost-effective, high-performance solution, with the lowest
power consumption and life cycle costs available.
Design
Alfa Laval designed the STNX range of decanter centrifuges with
a focus on performance, easy access, reliability and low noise
levels.
The rotating assembly is supported on a compact welded box
beam frame with main bearings at both ends. The in-line motor is
flanged or foot-mounted on the decanter with adjustable brackets
for belt tension adjustment. The bowl is driven at the conical end
by an electric motor using a V-belt transmission.
The bowl, conveyor, casing, inlet tube, outlets and other parts
that come in contact with the process media are made of AISI
316 and duplex stainless steel.
High-performance decanter centrifuge for starch production
STNX decanter centrifuge
Operating principles
Separation takes place in a horizontal cylindrical bowl
equipped with a screw conveyor. The product is fed into the
bowl through a stationary inlet tube and is then smoothly
accelerated by an inlet rotor. Centrifugal force immediately
makes the solids build up on the wall of the bowl.
The conveyor rotates in the same direction as the bowl, but
at a different speed, thus moving the solids towards the
conical end of the bowl. The solids leave the bowl through
the solids discharge openings into the casing.
Separation takes place throughout the entire length of the
cylindrical part of the bowl, and the clarified liquid leaves the
bowl by flowing over adjustable plate dams into the casing.
