声明
ABSTRACT
摘要
Contents
1.Introduction
1.1 Introduction
1.2 Residue fluid catalytic cracking Unit
1.2.1 Development of RFCC Technology
1.2.2 Development of RFCC Catalyst
1.2.3 Importance of RFCC to Oil Refinery Systems
1.2.4 RFCC products
1.2.5 Fault detection of RFCC unit
1.2.6 Faults Found in RFCC units
1.3 Statistical Process Monitoring
1.3.1 Traditional multivariate Process Monitoring Methods
1.3.2 Advancements in Multivariate statistical Process Methods
1.3.3 Data based fault diagnosis methods
1.4 Purpose and outline of thesis
2.RFCC Unit Process Description
2.1 Background
2.2 Process Description
2.3 RFCCU Operation Modes
2.4 Fault Detection of Oil Refinery Systems
2.4.1 Variable Selection
2.4.2 Operational Constraints
2.4.3 Medium Pressure Steam
2.4.4 Lean gas
2.5 Summary
3.Mathematical Technique
3.1 Principal Component Analysis
3.1.1 Introduction
3.1.2 Theory of Principal Component Analysis
3.1.3 Geometric Representation of Principal Component
3.2 Cumulative Sum(CUSUM)
3.2.1 Development of CUSUM
3.2.2 CUSUM Theory
3.2.3 CUSUM Mathematical Representation
3.2.4 TheAverage Run Length(ARL) of CUSUM
3.3 Multivariate Statistical Control Charts
3.3.1 Hotelling’s T2 Chart
3.3.2 Squared Prediction Error Chart
3.3.3 Principal Component Score Chart
3.3.4 Contribution Plot
3.4 Summary
4.CUSUM-PCA:Results and Discussion
4.1 Introduction
4.1.1 Principal Component Modeling
4.1.2 Fault Detection
4.2 CUSUM-PCA Method
4.3 Analysis of Monitoring Results and Discussion
4.3.1 Data production and Choice of Faults
4.3.2 Blank Experiment of normal conditions
4.3.3 Monitoring Of Fault 1:|nerease In Lean Gas Flow Rate
4.3.4 Monitoring Of Fault2:Decrease of Medium Pressure Steam
4.3.5 Product Analysis
5.Conclusion and recommendations
5.1 Conclusion
5.2 Recommendations for future work
REFERENCES
Acknowledgements
Publication
Author’s and Supervisor’s Credentials