The model comprises over 8,000 equations describing the material and energy balances, equilibrium relationships, and reforming reactions. During a period of steady operation, plant data is gathered and validated using a gross error detection algorithm. An optimization of the profit function is then solved to calculate over 20 new optimal setpoints which are sent directly to the OPC controllers and regulatory controls for implementation. Reactor temperatures are controlled to maintain target octane while respecting furnace tubeskin temperature constraints. C5s are controlled by manipulating reflux and reboil.
Observed savings result in project paybacks of less than a year.
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