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This paper addresses the implementation of a control loop performance monitoring system (CLPM) in a pulp and paper mill. The system chosen for the study is a continuous Kraft pulp digester which includes both fast and slow process dynamics, interactions and consequent disturbances. The aim is to track the performance of the control strategies implemented for this system, and to detect any significant...
Consistency control at the outlet of blow tanks and hi-density towers, the so-called double-dilution problem, is an area where further control development is needed. The task is to coordinate the manipulation of two input variables, coarse and fine dilution, to control the consistency, while simultaneously mid-ranging the fine dilution to keep it from saturating. This is made difficult by process...
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