Questions regarding the combustion of coke on the catalyst in the catalytic regenerator
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Recently, the flue gas from our catalytic unit regeneration contains a lot of ash (black in color) that is relatively light. What’s going on? Has anyone encountered this before? During the combustion of the coke on the catalyst in a normal catalytic regenerator, in addition to CO2, CO, and water vapor being produced, could ash also be present?
I haven’t seen it. Has the color of the regenerator changed compared to before?
The color of the catalyst is still normal; it’s just that there is ash in the regenerated flue gas, which enters the flue gas desulfurization and dust removal tower and causes the water there to turn black
What carbonization? Does the equipment get carbonized? Our two reactors and flues are all lined now
It’s possible, but we will have blackness for about a week. If it’s a precursor containing oil, it won’t last this long
What data needs to be analyzed? Here we only analyze these three indicators: CO, CO2, and O2
What is the catalytic structure type of the poster? Is it oxygen-deficient regeneration or oxygen-rich regeneration, single-stage regeneration or two-stage regeneration, and is it counter-current regeneration or normal regeneration? Made it clear. Let’s take a look at what the problem is Also, were there any operational fluctuations or abnormalities before the change?
The catalytic unit is of the coaxial type with a section for oxygen-depleted regeneration; we suspect it’s a problem with the raw materials
What substances are to be tested in the items brought? Coke? Would another dose of residue be good?