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为给大型循环流化床O2/CO2燃烧系统在高氧气浓度下的燃烧提供参考,在燃烧室直径140 mm、高度6 000 mm的0.15 MW循环流化床燃烧试验系统上,在O2/N2气氛中,进行了煤在高氧浓度下的燃烧试验。实验结果表明,在一次风氧气浓度49.0%～53.3%、二次风氧气浓度50.8%～56.0%时仍可以安全、稳定燃烧。煤在燃烧过程中SO2收率为92.2%～94.0%,配风对SO2收率影响不大。不同风量配比下,NOx收率为6.71%～7.64%,N2O收率为5.13%～7.23%。降低一次风氧量,有助于降低NOx收率和N2O收率。推迟二次风加入时间,有助于降低N2O收率,但会使NOx收率升高。
In order to provide a reference for combustion of large circulating fluidized bed (O 2 / CO 2) combustion system under high oxygen concentration, a combustion system of 0.15 MW circulating fluidized bed combustion with a diameter of 140 mm and a height of 6 000 mm was set up under O2 / N2 atmosphere , The combustion test of coal at high oxygen concentration was conducted. The experimental results show that it is safe and stable to burn when the primary oxygen concentration is 49.0% -53.3% and the secondary oxygen concentration is 50.8% -56.0%. In the process of combustion, the yield of SO2 in coal is 92.2% ~ 94.0%. The distribution of SO2 has little effect on the yield of SO2. Under the different air volume ratio, the yield of NOx is 6.71% -7.64% and the yield of N2O is 5.13% -7.23%. Reducing the amount of primary oxygen helps to reduce NOx and N2O yields. Postponing the secondary air addition time will help reduce the N2O yield, but will increase the NOx yield.