Abstract Oxy-fuel co-combustion of waste sludge and biomass with flue gas recirculation was conducted to observe the combustion characteristics and enrichment of CO2 using a 30 kWth circulating fluidized bed. The combustion reaction was accelerated and the ignition time was shortened by increasing the blending ratio of wood pellets and oxygen mixing ratio. The best combustion performance was observed at a 30% blended biomass ratio, with 23% oxygen mixing rate as oxy co-combustion with respect to heat recovery and enrichment of CO2; this study included experiments with ranges of 0 to 70% for the blending ratio and 21 to 30% for the oxygen mixing ratio. With flue gas recirculation at 60%, the oxy-fuel co-combustion of sludge with biomass was optimized in high enrichment of CO2 (over 90%) with less pollutant emissions, specifically 0.91% CO and 14 ppm NO.

中文翻译：

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循环流化床含烟气再循环的污水污泥和木屑颗粒的富氧混合燃烧

摘要 以30 kWth循环流化床为研究对象，利用烟气再循环进行废污泥与生物质富氧混合燃烧，观察燃烧特性及CO2富集情况。提高木屑颗粒掺混比和氧气混合比，加速燃烧反应，缩短点火时间。在 30% 的混合生物质比例下观察到最佳燃烧性能，23% 的氧气混合率作为氧气混合燃烧，在热回收和 CO2 富集方面；该研究包括混合比例为 0% 至 70% 和氧气混合比例为 21% 至 30% 的实验。在烟气再循环率为 60% 的情况下，污泥与生物质的氧燃料混合燃烧得到了优化，CO2 富集度高（超过 90%），污染物排放更少，特别是 0.