Is it normal for the filter bags in the dust collectors of UOP continuous reforming units to need to be replaced every few months?
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The continuous reforming unit I work in uses UOP technology and is equipped with dust collectors. Due to the excessive pressure difference before and after these collectors, the filter bags need to be replaced every few months. There is a very fine layer of powder on the surface of the replaced filter bags. Is this situation normal?
Is it due to abnormal operation, excessive dust levels, severe wear, or a decrease in specific surface area? Check whether the process parameters are within normal ranges and what the deviation is from the design requirements
Abnormal; it has been in use for 16 years with only 1 replacement.
Is the backpressure still high after backblowing? Then there might be issues with operation; the catalyst is severely worn. Also, consider using filter bags made of a different material. Are the filter bags made of canvas?
1. For the backwashing system, either the pressure difference or the time setting matters; meeting either one of these conditions is sufficient. It might be better to set the backwashing time to a shorter value and observe the effects after it has been in operation for some time. 2. The high amount of catalyst dust is related to factors such as the catalyst’s operating cycle, its circulation rate, the dew point of the gas used during regeneration, the water content in the reaction feed, and the extent of operational fluctuations. It’s necessary to investigate these factors. 3. During shutdown, the catalyst should undergo physical screening
Thank you, I’ll check it right away to see what’s wrong.
Using a canvas bag, the backflow differential pressure does not decrease at all.
The operation seems normal; will anyone calculate the linear speed increase during startup? It seems that increasing the air volume for the production process might be a bit excessive.
Continuous backflushing is ineffective; it seems there might be a problem with our backflushing system.
What is the current differential pressure of the dust collector in your facility?
It’s been several years; I can’t remember. Ensure proper backwashing is carried out. Are your segments too many?