Slide valves used to unhead coke drums have had a significant impact on the safety and efficiency of the unheading process in these vessels. Therefore, many refiners have changed to the inherently different inlet flow nozzle configurations that the slide valves have introduced. Single-side entry and dual-side entry have been common alternatives used as a result of the implementation of slide valves. Both of these configurations can depart from a centralized flow pattern and can create adverse flow and temperature distributions. Furthermore, these changes manifest themselves throughout the vessel with measureable mechanical integrity consequences in the cone, skirt, shell, and piping. This paper analyzes historic measured skin thermocouple data as a function of elevation of the coke drum. A total of three different refinery sites were included in this study; two of them having dual-side inlets, and one of them having a single-side entry. A statistical comparison was performed using the measurements focusing on the data that causes mechanical integrity problems in coke drums: temperature differences around the circumference and elevations, peak fill and peak quench rates.
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ASME 2017 Pressure Vessels and Piping Conference
July 16–20, 2017
Waikoloa, Hawaii, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5794-6
PROCEEDINGS PAPER
A Statistical Approach to Evaluating Single-Side Inlet vs Dual Inlet Temperature Distributions in Coke Drums
Jorge Penso,
Jorge Penso
Shell Global Solutions (US), Inc., Houston, TX
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Julian J. Bedoya,
Julian J. Bedoya
Stress Engineering Services, Inc., Houston, TX
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Alex Stoller,
Alex Stoller
Stress Engineering Services, Inc., Cincinnati, OH
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Richard S. Boswell
Richard S. Boswell
Stress Engineering Services, Inc., Houston, TX
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Jorge Penso
Shell Global Solutions (US), Inc., Houston, TX
Julian J. Bedoya
Stress Engineering Services, Inc., Houston, TX
Alex Stoller
Stress Engineering Services, Inc., Cincinnati, OH
Richard S. Boswell
Stress Engineering Services, Inc., Houston, TX
Paper No:
PVP2017-65875, V03AT03A014; 7 pages
Published Online:
October 26, 2017
Citation
Penso, J, Bedoya, JJ, Stoller, A, & Boswell, RS. "A Statistical Approach to Evaluating Single-Side Inlet vs Dual Inlet Temperature Distributions in Coke Drums." Proceedings of the ASME 2017 Pressure Vessels and Piping Conference. Volume 3A: Design and Analysis. Waikoloa, Hawaii, USA. July 16–20, 2017. V03AT03A014. ASME. https://doi.org/10.1115/PVP2017-65875
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