Application of abnormal event detection technology to fluidized catalytic cracking unit
First Claim
1. A method for abnormal event detection (AED) for some process units of a fluidized catalytic cracking unit (FCCU) comprising:
- (a) determining equipment groups and process operating modes of said FCCU to be covered by principal component analysis (PCA) models, wherein said equipment groups have minimal interaction with each other,(b) comparing online measurements from the process units to a set of models including principal components analysis models for normal operation of the corresponding process units of said FCCU,(c) determining if the current operation differs from expected normal operations so as to indicate the presence of an abnormal condition in a process unit of said FCCU, and(d) determining the underlying cause of an abnormal condition in the FCCU.
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Abstract
The present invention is a method for detecting an abnormal event for process units of a Fluidized Catalytic Cracking Unit. The method compares the operation of the process units to a statistical and engineering models. The statistical models are developed by principle components analysis of the normal operation for these units. In addition, the engineering models are based on partial least squares analysis and correlation analysis between variables. If the difference between the operation of a process unit and the normal model result indicates an abnormal condition, then the cause of the abnormal condition is determined and corrected.
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Citations
44 Claims
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1. A method for abnormal event detection (AED) for some process units of a fluidized catalytic cracking unit (FCCU) comprising:
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(a) determining equipment groups and process operating modes of said FCCU to be covered by principal component analysis (PCA) models, wherein said equipment groups have minimal interaction with each other, (b) comparing online measurements from the process units to a set of models including principal components analysis models for normal operation of the corresponding process units of said FCCU, (c) determining if the current operation differs from expected normal operations so as to indicate the presence of an abnormal condition in a process unit of said FCCU, and (d) determining the underlying cause of an abnormal condition in the FCCU. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A system for abnormal event detection (AED) for some of the process units of a fluidized catalytic cracking unit, FCCU, of a petroleum refinery comprised of:
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(a) an array of process measurement sensors, (b) an on-line means including a set of models including principal component analysis models in the set using process measurements from said array of process measurement sensors describing operations of the process units of said FCCU, wherein said FCCU has been divided into equipment groups with minimal interaction between groups, (c) a display which the on-line means including said set of models indicates if the current operation differs from expected normal operations so as to indicate the presence of an abnormal condition in the process unit, and (d) a display which the on-line means including said set of models indicates the underlying cause of an abnormal condition in the FCCU process unit. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44)
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Specification