Where is NOx formed in the exhaust gas from sulfur recovery units?
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This post was last edited by liaifeng on 2018-9-3 08:46. Where is NOx formed in the exhaust gas from sulfur recovery units? Klaus converter, or flue gas incinerator?
I’m not really sure about this; it should be a incinerator.
It is generated in the exhaust gas incinerator, and the sub-equivalent combustion control technique can be employed to reduce NOx formation.
Some literature states that, in theory, when ammonia is burned in a Claus furnace, substances such as NO and NO2 are generated under certain conditions. However, NO reacts with SO2 to form SO3 (which promotes the sulfation of the catalyst), so the amount of NOX produced in the reaction furnace should be minimal, accounting for a very small proportion of the total emissions. Strategies to reduce NOX typically include air splitting in the incinerator and low-nitrogen burners; from this perspective, NOX should be generated mainly in the incinerator.
It is mainly generated by the exhaust gas incinerator; burning with a sub-stoichiometric mixture of fuel can reduce NOx formation
The Klaus furnace creates a reducing environment, naturally as part of the flue gas incineration process; controlling the temperature is usually sufficient to meet the requirements
What temperature should be maintained in the incinerator to meet the standards?
Over 700 degrees – that’s what the foreigners requested, taking this factor into account
The nitrogen oxides produced during combustion are almost entirely NO and NO2. Among the nitrogen oxides produced during the combustion of natural mineral fuels such as coal, natural gas, and heavy oil, NO accounts for 90%, with the remainder being NO2.