Discussions on modifications to reduce sulfur emission targets
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The emission standards for sulfur recovery units are becoming increasingly stringent. In many plants, the process requires that liquid sulfur be degassed without going to an exhaust gas furnace. In 2013, Qilu Petrochemical and SDIC achieved good results through degassing followed by hydrogenation; in Zhenhai, direct feeding of degassed sulfur to the sulfur production furnace also solved the problem of sulfur-containing steam. The problem of purified exhaust gas containing residual steam has been resolved; some plants have adopted a two-stage regeneration and two-stage absorption process, while others simply add an alkaline washing step at the end of the installation. I urge everyone to share their ideas on how various plants have carried out these modifications
Add alkali for cleaning at the end of the device? Which companies are using this process? Are there any manufacturers that are using it currently?
It seems that in Europe, by using two levels along with SCOT, it’s possible to reach 80
There are many abroad, and in China they have only started to appear recently due to standard-related reasons. Over the next one or two years, alkali-based tail washing units will become widespread in SRUs. In fact, there are already many domestic examples of alkali washing being used for the exhaust gas treatment in sulfuric acid plants; if the original poster needs it, they can contact me.
Adding an ion liquid desulfurization unit is sufficient; hydrogenation is not required. The system resistance is **reduced**, and the desulfurization efficiency can be brought below 50 mg/Nm3
We are preparing to install a set of equipment for the direct oxidation method. .
Front Caouls + rear complexed iron, designed with sulfur dioxide level < 35.
Regarding the retrofitting of old installations, once exhaust gas hydrogenation has been implemented, it is no longer possible to stop this process. We hope everyone will discuss ways to reduce sulfur dioxide levels in the flue gases while still maintaining exhaust gas hydrogenation. A cost-effective and simple method of cutting.
Retaining hydrogen in the exhaust gases by installing a powered alkaline scrubber before the chimney can achieve extremely low SO2 emissions that meet the specified standards. Moreover, even if there are fluctuations in the hydrogen addition process, it is still possible to ensure that the exhaust gases meet the required standards. Would you consider such a process? Of course, a small amount of sodium sulfate solution will be discharged, which is not a major issue.
How low can sulfur dioxide be reduced to, and what are the by-products? What are the impacts?