In sulfur recovery units, what is the specified ratio of acidic gas to air? What are the hazards if this ratio is too high or too low?

2016-09-20View Original

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In sulfur recovery units, what is the specified ratio of acidic gas to air? What are the hazards if this ratio is too high or too low?

Reply #22016-09-20

This post was last edited by ylb913 on 2016-9-20 at 11:49. The ratio of air flow to acidic gas flow is related to the composition of the acidic gas; there is no fixed ratio for different types of acidic gas feedstocks. The air distribution is ultimately determined based on the assumption that the ratio of hydrogen sulfide to sulfur dioxide at the outlet of the second reactor is around 2:1. If the air supply is too low, the conversion rate decreases; if it is too high, in addition to a reduced conversion rate, hydrogenation of the exhaust gases may cause the hydrogenation reactor to overheat, or sulfur dioxide may penetrate.

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