Application of abnormal event detection technology to delayed coking unit
First Claim
1. A method for abnormal event detection (AED) for some process units of a delayed coking unit (DCU) comprising:
- (a) Comparing online measurements from the process units to a set of models for normal operation of the corresponding process units, (b) Determining if the current operation differs from expected normal operations so as to indicate the presence of an abnormal condition in a process unit, (c) Assisting the process operator to determine the underlying cause of an abnormal condition in the DCU, and (d) Performing corrective action to return the unit to normal operation.
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Abstract
The present invention is a method for detecting an abnormal event for process units of a Delayed Coking Unit. The method compares the operation of the process units to statistical and engineering models. The statistical models are developed by principal components analysis of the normal operation for these units. The engineering models are based statistical 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
49 Claims
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1. A method for abnormal event detection (AED) for some process units of a delayed coking unit (DCU) comprising:
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(a) Comparing online measurements from the process units to a set of models for normal operation of the corresponding process units, (b) Determining if the current operation differs from expected normal operations so as to indicate the presence of an abnormal condition in a process unit, (c) Assisting the process operator to determine the underlying cause of an abnormal condition in the DCU, and (d) Performing corrective action to return the unit to normal operation. - 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 DCU of a petroleum refinery comprised of:
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(a) a set of models for the process units describing operations of the process units including automatic detection of drum switches and furnace decoking operations, (b) a display which indicates if the current operation differs from expected normal operations so as to indicate the presence of an abnormal condition in the process unit, (c) a display which indicates the underlying cause of an abnormal condition in the DCU. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification