Abstract
Norsk Hydro a.s. is designing an operator support system to be implemented in a compound fertilizer plant by the summer of 1992. The goal of the system is to help operators keep process upsets to a minimum, thus reducing the total pollution from the plant as well as ensuring more stable product quality. This will be done by giving early warnings of process conditions that may lead to undesirable effects at a later time and by assisting the operators in tracing process upsets to their root cause. A combination of qualitative (rule-based) and quantitative (model-based) methods are used. The diagnosis is performed by a topological search from the detection point to the probable cause. The search is directed by automatic checking of process streams for unacceptable deviations. With few exceptions, rules are independent of the specific configuration, thus minimising the work needed after process modifications.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
