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High-performance decanter centrifuge for DDGS production0 pages
SG2 decanter centrifuge
High-performance decanter centrifuge for DDGS production
Application
Alfa Laval SG2 decanters provide the most cost-effective,
high-performance separation solution currently available for
DDGS production. These decanter centrifuges are used to
process high throughputs of stillage from all grain types so as
to achieving a low level of suspended solids and high cake
dryness, with reduced power consumption and lower life
cycle costs.
Design
Alfa Laval designed the SG2 range of decanters with a focus
on performance, easy access, reliability and low noise levels.
The rotating assembly is supported on a compact, in line,
welded box beam frame which includes the both motors for
ease of installation, quietness and low vibration. 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 into contact with the process media are
made of AISI 316 and duplex stainless steel. Parts that are
subject to wear are protected with replaceable sintered
tungsten carbide or weld applied tungsten carbide.
Operating principles
Separation takes place in a horizontal cylindrical bowl
equipped with a screw conveyor. The product Stillage 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 lower 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.
