ONLINE GROSS ERROR DETECTION SYSTEM APPLIED TO AN ALUMINA REFINERY EVAPORATION PROCESS

Lee, M., Love, R., Brown, G., Chatfield, R., Fletcher, S. and Asquith, J.

This paper presents the delivery of an advanced state-of-the-art online model-based system for instrument gross error detection (GED) and process monitoring applied to an alumina evaporation process. The system implemented at an Alcoa-operated refinery has been demonstrated to be able to detect faulty instruments and to provide reconciled process readings to site engineers. The reconciled readings are available via customised screens on a regular schedule. Examples provided in this paper demonstrate the capability of the GED system to address process and instrument issues within the building.