Questions regarding sulfur recovery by catalytic oxidation method
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Our plant uses the direct catalytic oxidation process for sulfur recovery. Currently, the washing water has turned white, and sulfur residues are floating on the surface of the water. What could be the cause of this, and how can it be resolved?
With sulfur-related issues, it is usually due to poor performance of the catcher, which leads to an increased space velocity.
The direct catalytic oxidation method yields low levels of sulfur dioxide due to the principles of selectivity; do you use alkaline washing or ammonia washing? All known sulfur separators cannot achieve a 100% interception rate; generally, other methods are used to increase this rate, such as addressing the issue by subjecting the system to intermittent heating and monitoring pressure differences. It is inevitable that sulfur will accumulate on the walls of the exhaust gases or in the washing water. The washing water contains sulfur and sulfides, and sulfides are one of the factors that cause high COD levels. Isn’t the pressure in your subsequent water treatment system high?