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Evaluation of an alternative vacuum pan control scheme

Schneider, P.A. (2003) Evaluation of an alternative vacuum pan control scheme. In: 25th Annual Conference Australian Society of Sugar Cane Technologists, 6-9 May 2003, Townsville, QLD, Australia



Conductivity-based vacuum pan controllers dominate the Australian sugar industry. A new scheme, based on Brix control of the massecuite and mother molasses is proposed. Multi-loop control of the process is demons trated, whereby the massecuite Brix is controlled by manipulating the liquor/A molasse s feed rate to the pan and the mother molasses Brix is controlled by manipulating the steam flow rate to the pan. A single loop controller is also proposed, which cont rols massecuite Brix by manipulating the feed flow to the pan. The steam flow rate is set manually (i.e. mother molasses Brix is uncontrolled). A gPROMS simulation of a pi vot pan under typical operating conditions demonstrates the efficacy of this approach.

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