The health evaluation of refinery units mainly focuses on the fields of fault detection and fault diagnosis.This technolo-gy can only monitor whether there is a fault in field devices,but it is difficult to find potential abnormalities or faults that perhaps oc-cur during the long-term operation of devices.To solve this problem,a novel device-level health evaluation system is proposed.The evaluation system establishes three evaluation indexes,including the process grouping health,safety interlock health and energy con-sumption and environmental health,so as to calculate the overall health of the catalytic reforming units.The reforming units are di-vided by all levels,the weighting of each level is determined by using the hierarchical analysis,and then the control loop anomaly de-tection technique combined with scoring rules is applied to calculate the process group health.The safety interlock system is repro-duced according to the early warning mechanism,and the energy consumption and environmental protection indicators are analyzed to obtain the overall evaluation results of the devices.The proposed evaluation system is applied to a catalytic reforming unit in a certain refinery.Experimental results show that the method can provides a quantitative and reasonable evaluation of catalytic reforming units.
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