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Enrichment of thallium in fly ashes in a Spanish circulating fluidized-bed combustion plant

机译：西班牙循环流化床燃烧厂飞灰中th的富集

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摘要

This work evaluates the behavior of thallium in a 50 MW industrial circulating fluidized-bed combustion plant (CFBC), focusing on the distribution of this element among the bottom and fly ashes separated by the solid retention devices in the plant. The results show that thallium species are mainly retained in the solid by-products and are not emitted to air with flue gases in significant amounts, proving that this technology is a more effective means of preventing thallium emissions than pulverized coal combustion technology (PCC). The mass balance of the thallium content in the solids shows that this element was retained in the ashes separated by the different devices installed in the plant. An evaluation of the ash fractions taken from the strippers, the heat recovery area, the hoppers in the air heater and the electrostatic precipitator, shows that thallium was relatively homogeneously distributed in all the ash samples, independently of their composition, but is slightly related to surface area, which in turn is dependent on particle size and unburned carbon content.
机译：这项工作评估了in在50兆瓦工业循环流化床燃烧工厂（CFBC）中的行为，重点是该元素在工厂中由固体滞留装置分离的底部和粉煤灰之间的分布。结果表明，th种主要保留在固体副产物中，不会随烟气大量排放到空气中，证明该技术比粉煤燃烧技术（PCC）更有效地防止了emissions的排放。固体中content含量的质量平衡表明，该元素保留在灰烬中，灰烬被工厂中安装的不同设备分隔开。对从汽提塔，热回收区域，空气加热器中的料斗和静电除尘器中获取的灰分的评估表明，th在所有灰分样品中相对均匀地分布，而与它们的成分无关，但与表面积，这又取决于粒度和未燃烧的碳含量。

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  • 来源
    《Fuel》 |2015年第15期|51-55|共5页
  • 作者

    M. Antonia Lopez-Anton; D. Alan Spears; Mercedes Diaz-Somoano; Luis Diaz; M. Rosa Martinez-Tarazona;

  • 作者单位

    Instituto Nacional del Carbon (INCAR), Consejo Superior de Investigaciones Cientificas (CSIC), C/Francisco Pintado Fe, 26, 33011 Oviedo, Spain;

    University of Sheffield, Sheffield S102TN, UK;

    Instituto Nacional del Carbon (INCAR), Consejo Superior de Investigaciones Cientificas (CSIC), C/Francisco Pintado Fe, 26, 33011 Oviedo, Spain;

    Hulleras del Norte S.A. (HUNOSA), Avenida de Galicia, 44, 33005 Oviedo, Spain;

    Instituto Nacional del Carbon (INCAR), Consejo Superior de Investigaciones Cientificas (CSIC), C/Francisco Pintado Fe, 26, 33011 Oviedo, Spain;

  • 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

    Thallium; Coal combustion; Circulating fluidized bed combustion; Toxic emissions;

    机译：铊;燃煤;循环流化床燃烧;有毒气体排放;

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