Sulfur emissions are on the high side

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This post was last edited by liaifeng on 2018-8-5 at 17:12. Since the maintenance work on our equipment started, the exhaust emissions have remained high – much higher than in the previous cycle. We’ve been dealing with this issue for almost a month now. I’ll briefly describe the setup of our facility: it involves a Krass reaction, exhaust gas hydrogenation, absorption, and exhaust gas combustion. The design capacity is 4,000 tons per year, with a processing volume of around 700 cubic meters. Towards the end of the previous cycle, the load was so high that it reached 1,200 cubic meters. After maintenance, the processing capacity for acidic gases is now between 700 and 900 cubic meters, while the exhaust gas volume remains high. We have analyzed various possible causes, but the problem has not been resolved yet. We have ruled out issues related to leaks in the equipment valves as well as problems with the control parameters; we also suspect that there may be issues with the absorption efficiency of the absorption tower and the quality of the MDEA used (based on the sulfur content in the rich and lean liquids, the quality of the amine solution seems fine, but there still seems to be some problem with it – it’s hard to say for sure). I wonder if any of you experienced similar situations and have any insights to share