Excessive VOCs in sulfur recovery
Thread Content
Recently, there have been issues with VOCs in the exhaust gas coming from the exhaust gas incinerator. An analysis of the fuel gas and hydrogen used for hydrogenation was conducted, and the exhaust gas from the absorption tower shows no significant changes compared to before. Please help analyze this situation!
If there are no reformed components in the analyzed fuel gas, it must be due to incomplete combustion; is it a lack of oxygen?
Do you also test for VOCs in your smoke? During previous restarts, propane and C4 were used as fuel gas, and carbon black was produced after passing through the furnace; adjusting the air volume did not have any effect.
Is the air supply to the incinerator staged? Modern designs use at least two stages. If staging is employed, the air supply to the burners needs to be adjusted; too little air supply will result in problems. The appropriate air supply for the burners should be slightly more than what is required for equivalent combustion with gas. Excessive air supply to the burners can cause the combustion rate to be too high, leading to loud noises from the furnace, while too little air supply can result in excessive VOC levels
Few people conduct this test; as for exactly which indicators are measured, that’s something learned from specialists.