Flue gas treatment for gas boilers
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This post was last edited by *aobing on 2019-9-27 at 12:44. It is a heat transfer oil furnace with a capacity of 3 million kcal; its fuel consists of natural gas along with some hydrogen. The current concentration of NOx in the flue gases is around 100 mg/m3. Are there any ways to reduce this value to below 50 mg/m3? Specifically, the NO concentration is 60–70 mg/m3, while the NO2 concentration is 0.
This post was last edited by Daoting Tusuo123456 on 2019-9-28 at 09:36. Some of the flue gas is mixed with air in order to reduce the oxygen content before combustion, to around 16-19%, thereby reducing the level of nitrogen oxides. This method can reduce nitrogen oxide levels, but I personally think it increases energy consumption: lol
Thank you. Flue gas recirculation is now in place; these are the analysis results after recirculation. Currently, the oxygen level after combustion is around 3.5%. Is it possible to reduce this oxygen content further, to around 2-2.5%?