COSTS AND BENEFITS OF THE CBA BOILING SCHEME FOR HIGH POL SUGAR PRODUCTION

THERE are numerous pan boiling schemes which can be used for producing high pol sugars, e.g. increased washup of A and B massecuites within the conventional three massecuite boiling scheme, dual production of high pol sugar and a lower pol sugar, the QHP process and boiling schemes such as the CBA scheme (or variations of it) where only A sugar is produced as shipment sugar. SRIÂ’s models for pan stage and fugal station operations were employed to simulate production of high pol sugar using several different flowschemes. The simulations were conducted for typical early season and mid-season cane conditions. The equipment requirements, operating and capital costs for the different flowschemes were determined and compared against a base condition for Brand 1 sugar production. Other parameters which were assessed included the colour of the shipment sugar and the steam consumption on the pan stage. An economic assessment of high pol sugar production was undertaken for use of the different flowschemes. This paper provides the results of those simulations and explores the potential application of the CBA boiling scheme into Australian pan stages.