Analysis of the reasons for excessive COD levels in wastewater from catalytic flue gas desulfurization
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As the title suggests, a potential burner tank combined with a posterior turbulent bed is used to fully regenerate the flue gas. After flue gas desulfurization (EDV) and denitrification (SCR), the saline wastewater is treated by adding flocculants (polyacrylamide) to remove the catalysts before it is discharged. Recently, there have been occasional instances of COD levels exceeding the allowed limits, and the reason for this is unknown. I hope experts can help analyze this issue: handshake
Is there a problem with the blower oxidation due to too much sodium sulfite?
We have analyzed this factor, and its impact is minimal.
The COD level is too high, which indicates an insufficient oxygen content. 1. The air supply from the fan is inadequate; 2. The sulfur content in the raw materials has increased, resulting in an extremely high sulfur level in the flue gas generated during regeneration
Is it because the sulfur content in the raw materials is too high?