Refinery uses column data to infer and control product properties

Installation of an online closed-loop system resulted in dramatic improvements of product qualities for a crude unit at a Pennsylvania refinery.With the new system installed, product qualities from the unit have much less scatter and the unit have better control of its reflux system. The new system significantly reduces crude switchover times while maintaining product qualities on target. It has also reduced operator loads.United Refining Corp.'s 65,000 b/d refinery in Warren, Pa., used two programs to implement inferential technology in its new online system: GCC (generalized cut point controller) and CPPM (crude plant-performance monitor). The system controls product qualities and i...

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