School of Environmental Science and Engineering/Tianjin Key Lab of Biomass-wastes Utilization, Tianjin University, Tianjin 300072, China.
School of Environmental Science and Engineering/Tianjin Key Lab of Biomass-wastes Utilization, Tianjin University, Tianjin 300072, China.
Waste Manag. 2019 Aug 1;96:47-56. doi: 10.1016/j.wasman.2019.07.017. Epub 2019 Jul 12.
This paper describes the effect of oxygen-enriched combustion (OEC) on the flue gas emission and combustion performance of municipal solid waste (MSW) in a full-scale waste incineration plant without flue gas recirculation. Input gas with different oxygen concentrations (21%, 24%, 27%) were supplied into the MSW grating furnace with a capacity of 150 t/d to evaluate the effect of inlet oxygen content on the emissions of NO, NO, SO, HCl as well as dioxins (PCDDs and PCDFs). Combustion temperature in the incinerator, unburnt rate and thermal efficiency were also examined to assess the combustion performance under OEC condition. Results showed that the amount of SO and HCl decreased to lower levels during OEC condition, while the average concentrations of NO and NO increased with increase in oxygen content of input gas. Dioxins (PCDDs and PCDFs) in both flue gas and fly ash were highly increased elevated by the oxygen intake, especially for PeCDFs and HxCDFs. The average temperature in three grates of incinerator increased as oxygen concentration increased, while the unburnt rate gradually decreased, indicating a slight improvement of MSW thermal efficiency and more complete combustion under OEC condition.
本文描述了在不采用烟气再循环的情况下，富氧燃烧（OEC）对 150t/d 规模垃圾焚烧炉中城市固体废物（MSW）的烟气排放和燃烧性能的影响。将不同氧浓度（21%、24%、27%）的输入气体供应到 MSW 炉排炉中，以评估入口氧气含量对 NO、NO、SO、HCl 以及二恶英（PCDDs 和 PCDFs）排放的影响。还检查了焚烧炉中的燃烧温度、未燃率和热效率，以评估 OEC 条件下的燃烧性能。结果表明，在 OEC 条件下，SO 和 HCl 的排放量降至更低水平，而随着输入气体中氧气含量的增加，NO 和 NO 的平均浓度增加。OEC 条件下，氧气的摄入使烟气和飞灰中二恶英（PCDDs 和 PCDFs）的含量大幅升高，尤其是 PeCDFs 和 HxCDFs。随着氧气浓度的增加，焚烧炉三个炉排的平均温度升高，而未燃率逐渐降低，表明 MSW 热效率略有提高，OEC 条件下的燃烧更完全。
