EFFICIENT CENTRIFUGAL OPERATION

摘要

ASPECTS of batch centrifugal operation are considered in terms of washing, discharging and energy consumption with a view to lowering the operating cost within the sugar factory. In addition the impacts of MA and CV on losses in continuous centrifugals are assessed. The impact of poor batch centrifugal operation is calculated in terms of the cost of evaporating excess wash water, recrystallising dissolved sugar, and the load on the factory. The cost of sugar lost through continuous centrifugal screens due to both incorrect screen selection and poor raassecuite boiling is estimated. Results indicate that optimised modern batch centrifugals have higher sugar yields, minimising recirculation of sugars, thus lowering the overall production costs and load on the factory. Improved sugar boiling and better screen selection will prevent sugar being lost to the final molasses, resulting in the recovery of more sugar. The importance of good centrifugal operation should not be underestimated as the costs of poor operation are very high, in some cases running to many thousands of US dollars per year.