Precautions for shutting down catalytic units
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The facility is about to stop operating for maintenance – please share any important tips! :handshake :victory:
With oil prices rising now, you probably won’t stop, right? Even if you do stop, it’s for emergency repairs. When reacting, be careful to remove the agent completely; when fractionating, make sure to clean out the oil slurry line. The others should be easier.
1. During shutdown, maintain a reactor pressure higher than that of the regenerator to prevent air from entering. The unloading process should be carried out slowly at first and then more quickly; check the unloading line as well as the expansion of the container, and strictly control the unloading temperature to ≤500°C. 2. When draining the oil, it is necessary to follow the principle of moving from front to back and from top to bottom, and thoroughly remove gasoline, diesel, reprocessed oil, sludge, etc., one by one. The oil stored in various towers and containers should be emptied as much as possible; discharging it into the sewer system is strictly prohibited. 3. Strictly control the discharge temperature of various oil products; oil is recovered through the slurry system, with the outlet temperature of the cooling tank being ≤100°C.
You’re all absolutely right – safety comes first. In the midst of an economic crisis, it’s fine to earn less money; as long as one is safe and the equipment is safe, everything else can be taken care of. Actually, there’s just one sentence: Follow all the procedures – there should be no problems!
Yeah, if oil prices have already gone up, why stop now? Whether it’s shutting down or starting up operations, I think the most important thing is to organize things well. In particular, management and supervisors need to keep track of the progress regarding starting or stopping operations at all times. This applies not only to engineers and managers but especially to team leaders
http://bbs.hcbbs.com/thread-197875-1-1.html What issues should be considered during catalyst shutdowns? http://bbs.hcbbs.com/viewthread.php?tid=336634&highlight=%B4%DF%BB%AF%2B%CD%A3%B9%A4 Summary of catalyst cracking startup and shutdown procedures. I hope to find the information I need here