The catalyst unit slurry has a high solid content
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Our unit’s settler has a low single-spin pressure drop and low leg density, which leads to severe catalyst loss. Please advise on how to address this issue, experts
1. Strengthen the reprocessing of oil slurry. 2. Stop work to clear the material leg.
Are there any comparative data? By comparing before and after, there may be short circuits where the pressure is low; it has been confirmed that a low density of the material legs is also normal. Have there been any abnormal operating conditions recently? Do you have the means to calculate the level height of the settler? Make an adjustment by comparing the changes in reserve volume to see whether it improves or worsens, or if there is no change at all. If this continues, one must stop and check whether there are any perforations in the cyclone’s barrel or problems with the air lift pipe. What is the solid content?
We used to do the same; after cutting the material, let’s try fluidization!
1. Change the storage amount； 2. Increase the amount of reprocessed oil slurry ； 3. Increase the discharge of oil slurry ； 4. If that doesn’t work, there’s no choice but to cut the material and clean the leg.
The equipment itself, as well as the steam and feed oil, don’t seem to be the issue; otherwise, it would be appropriate to lower the reaction temperature in order to remove more slurry
The original poster’s description is quite general; you can provide your company’s daily operating parameters so that we can analyze them together. Compare the agent leakage that occurs with the normal production operating parameters. Our unit has also urged, and we are discussing this issue together; you can also send an email to my mailbox so that we can learn and improve together.
1. Change the storage capacity of the settler； 2. Increase the amount of reprocessed oil slurry ； 3. Increase the amount of slurry discharged outside ； 4. Reduce a small amount of steam to lower the linear velocity in the settler ； 5. Stop feeding and clean the coke lumps.