The relationship between NH3 in catalytic cracking regeneration flue gas and the regeneration method, along with the chemical reaction equations

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Two new catalytic cracking flue gas desulfurization units have been installed; the main problem at present is that the ammonia nitrogen content in the discharged slurry is very high, which severely affects the operation of the wastewater treatment plant. Our plant’s two catalytic units employ a two-stage regeneration process: first oxygen-depleted regeneration, followed by oxygen-enriched regeneration. Regarding this issue, it was found that the ammonia nitrogen content in the slurry of the flue gas desulfurization unit using the pre-combustion tank regeneration method is low. Does anyone knowledgeable about this know the principle and the chemical reaction equations involved? In particular, I’m interested in the differences between oxygen-poor regeneration and oxygen-rich regeneration, as well as their corresponding chemical reaction equations. Waiting online... :handshake Thank you so much! ! ! ! !