International Sugar Journal

Key considerations for high-performance continuous vacuum pans* [Full subscriber]

Abstract         The two most important objectives for a high-performance continuous vacuum pan (CVP) are good crystal quality and high exhaustions.  To achieve these, the pan design needs to incorporate features that promote plug flow (a narrow crystal residence-time distribution), a high heat-transfer coefficient (HTC) and vigorous circulation.  Focussing on these will also achieve an energy-efficient pan that can operate on a low steam-massecuite temperature differential.  Good plug flow is essential for good crystal quality (low CV), which enables good purging with minimal washing and good exhaustions.  This, in turn, minimises reboiling and its associated energy and sucrose losses.  Low CVs…

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