March 2002


Integrating tank farm operations

Combining a high-level expert system with the DCS increased productivity and reduced losses

Hallstrom, R., Montin, T., Nynas Refining AB; Stalhandske, P., Pronyx AB

At AB Nynäs Petroleum's oil refinery in Nynäshamn, Sweden, an advanced system has been implemented for supervising and managing tank farm activities. The system provides better quality control, compliance with the production schedule and operator support. The system enables operators to remotely control activities in the tank farm, e.g., change valve positions, start and stop agitators, as well as monitor tank levels and handle alarms. It converts levels to mass inventories and keeps track of oil movements. It will supervise all oil movements and alert the operators if inventory changes occur in tanks that have not been defined by a transfer order. It assists the ta

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