High COS content in sulfur hydrogenation exhaust gases
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During the shutdown of the sulfur unit, the exhaust gas hydrogenation system is activated during sulfur blowing operations; when the unit is restarted, the COS content in the hydrogenated exhaust gas is high, resulting in an excess level of SO2 in the exhaust gas. How should this be addressed? ?
How does your sulfur blowing process integrate with the hydrogenation system? How are the exhaust gases after hydrogen addition handled during sulfur injection?
What do the devices in your factory look like? It is likely that the low temperature in the primary Claus converter hinders the hydrolysis of COS, resulting in an increased COS content. Do you have exhaust gas hydrogenation treatment equipment? COS can be converted into hydrogen sulfide after passing through such a hydrogenation device.
How is the hydrogen off-gas system operated in the sulfur blowing process? Is there a problem with the catalyst?