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Centrifugation

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Centrifugation for efficient crystal separation

During centrifugation, sugar crystals are separated from the mother liquor after crystallisation. Separation efficiency, crystal washing and a controlled process are essential factors in achieving the required sugar purity, colour, and residual moisture content while minimising sugar losses.

Centrifugation

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Batch centrifugal: E-series

Centrifugals are the most dynamic type of machinery used in sugar production. At high rotational speeds, the sugar crystals are separated from the mother liquor.
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K3300F continuous centrifugal

The implementation of continuous processes in production is one factor that ensures efficiency.
Databased PIDs with amount and properties img

Available upgrades / retrofit

Would you like to see better performance? Or an upgrade in line with the latest legal requirements and to the state of the art?
Optimum energy use thanks to state-of-the-art drive technology

Centrifugation with technologies from BMA

BMA offers a comprehensive range of batch and continuous centrifugals for all massecuite grades, from refined sugar or high-purity A-massecuite to low-purity C-massecuite. Designed for reliable crystal separation and efficient crystal washing, these machines ensure consistent product quality and stable process performance. Advanced drive and automation technologies support a high throughput, operational reliability, and consistent separation results throughout the campaign.

A key step before drying and cooling

Effective centrifugation delivers sugar crystals with the required purity and residual moisture content for downstream drying and cooling. Through reliable separation performance and seamless integration into the production process, BMA’s centrifugal technologies play a significant role in boosting the sugar yield, product quality, and overall plant efficiency.

Process expertise beyond saccharose

FAQ Centrifugal Basket

Will our old spindles fit the new hubs? Do the old backing screens fit the new baskets?
The baskets with elliptical openings are fully compatible.

The hub seat/basket seat and the inner dimensions are the same as before.

The weight and therefore the moment of inertia are lower. We recommend adjusting the converter to match the basket.

For baskets with elliptical openings, an inspection interval of 450,000 batches applies.

What changes to the converters are required? Do we need to set specific parameters? Should BMA take over the commissioning?
There is no need for full commissioning from scratch.
Only the behaviour of the motor during transition from acceleration to separation speed needs to be checked.
Any overshoot should be avoided.
What is the size of the open area compared to the old centrifugal basket design?
The old centrifugal basket had round openings and an open area of approx. 0.4 %. The new basket with elliptical openings has an open area of approx. 0.75 %, i.e. almost twice as big.
At what maximum wall wear can the centrifugal basket still be operated safely? (Is a reduction of the wall thickness by, say, 1 mm still OK?)
Because of the material used, there should be no significant wall wear with either the old or the new centrifugal basket. It is designed for high wear resistance, permitting safe operation throughout its entire life cycle. Consequently there is no need to define a tolerance for a specific reduction of the wall thickness.
Is it possible – as it was with the old design – to rebore the elliptical openings of the new centrifugal basket if there are minor cracks?
With the old design, individual openings were in exceptional cases rebored specifically to eliminate manufacturing flaws (e.g. minor cracks or defects in the material). This would always be done following precise calculations and careful technical consideration.
With the new design with elliptical openings, reworking by reboring is not possible. However, because of the improved manufacturing quality and the updated geometry, such flaws are not expected to occur in the new design.
At what number of batches can the centrifugal basket still be operated safely (TÜV inspection in a disassembled state every 3 years)?
The new centrifugal baskets are designed for a fatigue strength of approx. 1.5 million batches.

Comparison of inspection intervals:

  • Old design: First and second inspections after every 350,000 batches, then after every 120,000 batches
  • New design: First and second inspections after every 450,000 batches (+29 %), then after every 240,000 batches (+100 %)