Sulfur content in coke oven gas
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What is the sulfur content in coke oven gas after various desulfurization technologies are employed in the current gas purification processes of the traditional coking industry? Does the sulfur content in coke oven gas mainly refer to H2S? So, what is the content of that large amount of organic sulfur COS, and how can it be recovered and processed? What is the SOX content in the coke oven exhaust gases generated after the combustion of furnace gas? I hope everyone can provide some production data for reference! ! Thank you!
In coke oven gas, the hydrogen sulfide content is 6–8 g per standard cubic meter; after desulfurization, the hydrogen sulfide level is required to be no more than 20 mg per standard cubic meter
It is easy to reduce the H2S level to 20 mg after desulfurization. Calculations show that 1 cubic meter of coke oven gas contains 20 mg of H2S; the exhaust gas generated upon combustion amounts to 6.1 cubic meters, and the concentration of SO2 resulting from the conversion of H2S is = 64*20/34/6.1 = 6.2 mg/Nm3. After desulfurization, the organic sulfur content is generally 250–350 mg, with CS2 being the main component of organic sulfur, followed by COS and thiophene. The main cause of excessive SO2 levels in the exhaust gases is organic sulfur present in the recycled furnace gas; secondary causes include leaks from the walls of the coke oven chambers, which allow raw furnace gas to enter the combustion chamber and burn there. In waste gas, the hydrogen sulfide content is 6–8 g per standard cubic meter; a 1% increase in leaks will result in a very high level of SO2 in the exhaust gas.
Among organic sulfurs, CS2 accounts for about 60%, carbonyl sulfide accounts for about 20%, and the remaining 20% is made up of other compounds. Removing organic sulfur is not as effective as flue gas desulfurization