Facilitator: Evan Hyde – REFCOMM Inc.
Overview
What do you want to talk about? Bring your process and troubleshooting issues to this session. Discuss and collaborate with your DCU colleagues from around the globe.
RECAP: This DCU Process Breakout session was held on 18 February 2021. Facilitated by Evan Hyde of REFCOMM, 40+ DCU professionals from around the globe participated in the discussion. Participates submitted questions and discussion topics prior to and during the breakout.
Some of the discussion points were:
- If you have an interrupted drum, can we come back in the same drum? If yes, in which condition?
- How to avoid powdery coke formation, which will cause dust related issues. This is being observed particularly while processing Low Asphaltene Short residue ( 4-5 wt%).
- We have been observing H2S release from coke drum while draining and coke cutting. Is it possible to control H2S release?
- Are there any design improvements in the main fractionator bottom internals for coke removal?
- In our Delayed Cokers (Wood Technology), we have temperature and pressure rules that must be fully covered before opening the drums to the atmosphere for draining. It is quite common that we have to bypass those temperature interlocks to keep running or decrease the fresh feed to the unit while those temperature values decrease. These temperature thermocouple are located in the overhead vapor line going to main fractionator and they are usually surrounded by coke, which doesn’t help with an accurate reading. Do you have the same permissive/interlocks? Do you often have the same problem? How do you handle that problem? Increasing the temperature permission values? If so, up to which values?
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