Regarding the catalytic slurry freezing point and line sweeping issues.
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What is the range of the freezing point of catalytic slurry? Generally, after a short-term shutdown and the external discharge stops, how soon should oil be pushed in to clean the lines? Thank you!
The freezing point is between -20 and -30°C; scanning is performed at temperatures 80°C above the freezing point.
There are no strict requirements for this; as long as it’s not below 50 degrees, there shouldn’t be any major issues. If fluctuations during short-term operation cause the slurry to spill out and stop flowing, it’s not necessary to clean the system immediately