Inferential control -- Part 1: Crude unit advanced controls pass accuracy and repeatability tests
- Singapore Refining Co. Ptd. Ltd., Pulau Merlimau (Singapore)
- BP Oil International, London (United Kingdom)
An inferential model is one that provides a quality for which an analyzer is not available. This type of model uses readily available physical measurements -- such as temperatures, pressures, and flow rates -- to infer a quality such as kerosine flash point. The No. 2 crude distillation unit (CDU-2) at Singapore Refining Co. Pte. Ltd.'s Pulau Merlimau refinery has a nominal 130,000 b/d capacity. It produces naphtha, kerosine, diesel, and residue products from a wide range of crude blends. Over the past 12 months, extensive advanced control applications have been implemented on the unit. This first of two articles will describe the control system and its implementation. The second will outline the project's achievements, including reduced quality giveaway and increased profits. The paper describes background of the company and unit, the process, project implementation, the Infer model, model tuning, closed-loop control, feed rate maximization, and economic monitoring.
- OSTI ID:
- 6814911
- Journal Information:
- Oil and Gas Journal; (United States), Vol. 92:48; ISSN 0030-1388
- Country of Publication:
- United States
- Language:
- English
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