(35a) Real Time Calculation and Closed-Loop Control of Dewpoint and Salt Deposition Temperature at a CDU, Using an Online Analyzer
AIChE Spring Meeting and Global Congress on Process Safety
2018
2018 Spring Meeting and 14th Global Congress on Process Safety
21st Topical Conference on Refinery Processing
Advanced Process Control and Optimization II
Monday, April 23, 2018 - 3:30pm to 4:00pm
Corrosion of a CDU column overhead system can have dramatic consequences for refinery operation. Presence of water, chlorides, ammonium, amines, etc⦠creates a corrosive environment requiring overhead system monitoring. Since there is a significant economic penalty associated with increasing the overhead temperature to minimize the deposition of salts, refiners are typically trying to limit this temperature increase to control the presence of some key chemical species, and measure their remaining concentrations. This presentation addresses some of the challenges associated with computing water dewpoint and ammonium chloride salt deposition temperature in real time, and shows how TOTAL has successfully achieved closed-loop control of these temperatures using a NALCO online chlorides and ammonium analyzer coupled to an online calculation software and a multivariable predictive controller.
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2018 Spring Meeting and 14th Global Congress on Process Safety
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AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $225.00 |
Non-Members | $225.00 |
21st Topical Conference on Refinery Processing only
AIChE Pro Members | $100.00 |
Fuels and Petrochemicals Division Members | Free |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $150.00 |
Non-Members | $150.00 |