What is the best process currently available for treating waste gas from liquid sulfur tanks?
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This post was last edited by liaifeng on 2018-9-3 09:13. The exhaust gas from the liquid sulfur tank contains sulfur particles and hydrogen sulfide; to protect the environment, this exhaust gas is washed with water and then sent to an incinerator, or it is pumped using fans to a reaction furnace for combustion. However, the results achieved using this method are not very satisfactory. Could you share any successful experiences with using your devices?
The Shell air stripping degassing process remains the most effective and widely used method at present.
Are there any relevant resource links that I can check?
Whether it is air bubbling degassing, quinoline injection cycle degassing, degassing tower degassing, or other degassing methods, there is always waste gas that needs to be treated. Generally, as the original poster mentioned, this gas is sent to an incinerator in the design process. However, sending it to an incinerator can affect the smoke emission standards; therefore, these days it is designed to be burned in a combustion furnace. Indeed, this does have some impact on the combustion furnace, but since the volume of this gas is small, the impact is not significant. I’m not sure what the original poster meant by saying the application is not ideal – could they be more specific? Are there any faults occurring in the combustion furnace?
Is the suction power of the pump selected insufficient?
One method involves using a Roots pump to transfer sulfur-containing exhaust gases to the reaction furnace; however, the Roots pump tends to accumulate sulfur, which makes it difficult to restart it after it stops working. Another method involves using ammonia water to absorb hydrogen sulfide from the exhaust gases as well as to capture sulfur powder; however, the pump inlet is constantly clogged by sulfur powder, making maintenance very difficult.
Does the steam from the steam extractor go into the sulfur production furnace or the flue gas incinerator?
Under normal conditions, it should go into the sulfur furnace; under abnormal conditions, it can go into the incinerator.