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Blending effect of sewage sludge and woody biomass into coal on combustion and ash agglomeration behavior

机译：污泥和木质生物质混入煤中对燃烧和灰分聚集行为的混合作用

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摘要

The co-combustion of sewage sludge and woody biomass is a key issue in coal power plants. Different combustion and ash behaviors of sewage sludge and woody biomass cause unpredictable operating concerns. In this study, the combustion and ash agglomeration behavior of blended fuel of sewage sludge and woody biomass (BSW) were investigated while coal co-combusted with it. Thermogravimetric analysis (TGA) revealed that adding a high amount of BSW into the coal lowered volatilization, ignition, and burn-out temperature. The char combustion reactivity of coal differed from that of BSW. The shrinking core model (SCM) and volumetric reaction model (VRM) were used to fit the char combustion reactivity of coal and BSW. In the case of ash agglomeration behavior, BSW addition led to increasing particle agglomeration at fouling temperatures. In particular, phosphorus composition influenced particle growth, which was verified using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) analysis. Furthermore, the ash mixture ratio of BSW and coal changed the intensity of the phosphorus-bearing mineral phase from X-ray diffraction (XRD) analysis, and finally influenced the melting temperature of the ash.
机译：污泥和木质生物质的混合燃烧是燃煤电厂的关键问题。污水污泥和木质生物质的不同燃烧和灰化行为引起不可预测的运行问题。在这项研究中，研究了污泥与木质生物量（BSW）混合燃烧时的燃烧和灰分凝聚行为。热重分析（TGA）表明，向煤中添加大量BSW可以降低挥发，着火和燃尽温度。煤的焦炭燃烧反应性不同于BSW。采用收缩核模型（SCM）和体积反应模型（VRM）来拟合煤和BSW的焦炭燃烧反应性。在灰分结块的情况下，添加BSW会导致结垢温度下颗粒结块的增加。特别地，磷成分影响了颗粒的生长，这可以通过使用扫描电子显微镜和能量色散X射线光谱法（SEM-EDX）分析来验证。此外，BSW和煤的灰分混合比通过X射线衍射（XRD）分析改变了含磷矿相的强度，并最终影响了灰分的熔化温度。

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  • 来源
    《Fuel》 |2018年第1期|266-276|共11页
  • 作者

    Namkung Hueon; Lee Young-Joo; Park Ju-Hyoung; Song Gyu-Seob; Choi Jong Won; Choi Young-Chan; Park Se-Joon; Kim Joeng-Geun;

  • 作者单位

    Korea Inst Energy Res, Clean Fuel Lab, 152 Gajeong Ro, Daejeon 34129, South Korea;

    Korea Inst Energy Res, Clean Fuel Lab, 152 Gajeong Ro, Daejeon 34129, South Korea;

    Korea Inst Energy Res, Clean Fuel Lab, 152 Gajeong Ro, Daejeon 34129, South Korea;

    Korea Inst Energy Res, Clean Fuel Lab, 152 Gajeong Ro, Daejeon 34129, South Korea;

    Korea Inst Energy Res, Energy Saving Lab, 152 Gajeong Ro, Daejeon 34129, South Korea;

    Korea Inst Energy Res, Clean Fuel Lab, 152 Gajeong Ro, Daejeon 34129, South Korea;

    Korea Inst Energy Res, Clean Fuel Lab, 152 Gajeong Ro, Daejeon 34129, South Korea|Dongwon Heavy Ind Co Ltd, Jeongoksandan 7 Gil, Hwaseong 18554, South Korea;

    Korea Inst Energy Res, Energy Saving Lab, 152 Gajeong Ro, Daejeon 34129, South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sewage sludge; Woody biomass; Co-combustion; Ash agglomeration; Mineral phase;

    机译：污水污泥;木质生物质;燃烧;灰分凝聚;矿物相;

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