Falcon03
Chemical
- Dec 26, 2002
- 46
Hello,
We are working on tuning our DMC (Dynamic Martix Control) models for Crude tower and we are looking for better optimization methods to control the Naptha 90% cut point, Kero Flash and Kero freeze point. We usually control our Naptha 90% by manipulating the reflux to maintain the top temperature and our model was built based on this. However, after we commissioned the model the Naptha 90% target was on target, whereas, the Kero Flash point went off spec.
Several attempt methods were considered but it didn’t work, we finally took our model offline and we went back to traditional ways.
We do have an on line analyzer for Naptha, Kero specs. What DMC doses is it take the lab result and compare it with the analyzer results and correct for results differences.
My question is, what is the typical way to control both Naptha and Kero spec if we consider dynamic control system?
Do you manipulate the MID P/A flow to control the Kero freeze point only?
We are working on tuning our DMC (Dynamic Martix Control) models for Crude tower and we are looking for better optimization methods to control the Naptha 90% cut point, Kero Flash and Kero freeze point. We usually control our Naptha 90% by manipulating the reflux to maintain the top temperature and our model was built based on this. However, after we commissioned the model the Naptha 90% target was on target, whereas, the Kero Flash point went off spec.
Several attempt methods were considered but it didn’t work, we finally took our model offline and we went back to traditional ways.
We do have an on line analyzer for Naptha, Kero specs. What DMC doses is it take the lab result and compare it with the analyzer results and correct for results differences.
My question is, what is the typical way to control both Naptha and Kero spec if we consider dynamic control system?
Do you manipulate the MID P/A flow to control the Kero freeze point only?
