I’m asking the experts here: where on earth does the catalyst in the regenerator go when it leaks away?
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I’m seeking help from the experts on this forum! In a 1 million tons per year catalytic cracking unit, if there is a sudden failure in the main fan system that results in a disruption of air supply, does that also cause the flue gas flow to stop? When air supply is restored, could the catalyst in the regenerator be lost along with the flue gas stream? The amount of catalyst lost amounted to over 50 tons. Have you ever heard of such a huge loss? So where exactly did that running agent go? Is it possible it was washed away along with the seawater desulfurization tower? I’m a newcomer with quite a few questions. I would be extremely grateful if the experts here could answer them carefully!
1. When a sudden failure occurs in the main fan unit, resulting in an interruption of air supply, the flue gas also disappears. 2. When air supply is restored, the catalyst in the regenerator may be lost along with the flue gas stream. 3. The amount of catalyst lost exceeded 50 tons, and it may have been washed away along with the seawater desulfurization tower.
After running so many cycles, is the smoke extractor okay?
50 tons of catalyst isn’t much – take a look at your catalyst tanks; they can hold at least 200 tons or more. You can use that to estimate how large a quantity of 50 tons of catalyst actually is.
Leakage agents can be divided into those that leak from the settler; such agents end up in the distillation system, increasing the solid content of the slurry. There are also leakage agents from the regenerator, and it is necessary to check whether all of the materials from the three spinners have been recovered into the waste agent tank
If the degraded reagent has been collected by the three-spinners into the waste reagent tank, can it still be used?
It is absolutely unacceptable for catalyst to escape from the settler; if the solid content of the slurry exceeds the specified limit, your slurry system will become dysfunctional within a few days. The regenerator loses its efficiency; it’s likely due to significant fluctuations when starting up. This is something that needs to be taken into account. As for the catalysts in the three-spinners, they can still be used. Waste catalysts are essentially balance agents, with relatively low activity; however, catalysts contaminated by heavy metals cannot be used anymore.
If the main fan stops, some of the catalyst will flow back to the check valve at the main fan’s outlet, as well as into certain pipelines. This catalyst can be blown back to the regenerator. Additionally, some of it will go with the flue gas; in that case, it is mostly recovered as a filter cake through flue gas desulfurization processes.
Running a 50-ton catalyst triple spin dryer doesn’t yield much recovery; once the waste catalyst tank behind it is filled, the catalyst goes straight into flue gas desulfurization.
When the main air flow has just been connected and the system pressure has not increased yet, leakage can occur, as the centrifugal pressure drop and the inlet linear velocity are insufficient； Running 50 doses indicates a problem with the centrifuge; otherwise, it would be impossible to run that many doses!
What is recycled are all fine powders, and no one uses them