Abstract

According to one industrial engineer, “reconciliation of mass balances to monitor chemical tank inventories is a struggle even at the best of times”. This paper is concerned with the design of an omine and online fault detection and diagnosis monitoring system for the caustic tank inventory process at a pulp and paper company. Even with limited instrument redundancy, the omine monitoring analysis was able to correctly detect and diagnose sensor calibration errors. The scheme is now undergoing online implementation tests

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