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Evaluation of the combustion behaviour and ash characteristics of biomass waste derived fuels, pine and coal in a drop tube furnace

机译：落管炉中生物质废物衍生燃料，松木和煤的燃烧行为和灰分特性评估

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摘要

Currently there is an increasing interest on a new generation of low cost biomass fuels derived from human activities like wood and forestry residues, crop residues and refuse derived fuels (RDF) produced from municipal or industrial solid waste. The main objective of this study is to evaluate the combustion behaviour and ash characteristics of a number of these renewable fuels, namely rice husk, straw, coffee husk and RDF derived from municipal waste. For comparisons purposes, the study also includes a bituminous coal and pine branches. The study was carried out in a drop tube furnace (DTF), where data was obtained for gas temperatures, particle burnout, and carbon, hydrogen and nitrogen release along the reactor for the six solid fuels. The analysis of the experimental data included the use of both a one dimensional (1D) model and the Fluent. The results reveal that biomass fuels yield particle burnout values comparable to those of coal due to a number of factors that have opposite effects, mainly their higher volatile matter, which increases the burnout, and their higher moisture content and larger particle size, which decreases it. According to the 1D model, the residence time of the particles in the DTF is strongly affected by the particle size, but the number of size fractions considered has little influence on the calculated burnout. Moreover, the use of the Sauter mean or mass median diameters is not appropriated to represent the biomass particle sizes in model calculations. Predicted burnout with the 1D model is similar to those predicted by the Fluent. The ash composition of the fuels revealed that RDF might have some corrosion and slagging potential, while the use of rice husk and straw could induce slagging through the formation of low melting temperature ashes.
机译：当前，人们对人类活动产生的新一代低成本生物质燃料的兴趣日益增长，例如从城市或工业固体废物中产生的木材和林业残留物，农作物残留物以及垃圾衍生燃料（RDF）。这项研究的主要目的是评估许多此类可再生燃料的燃烧行为和灰分特性，即稻壳，稻草，咖啡壳和城市垃圾产生的RDF。为了进行比较，该研究还包括烟煤和松枝。这项研究是在滴管炉（DTF）中进行的，在该炉中获得了六种固体燃料的气体温度，颗粒燃尽以及沿反应堆的碳，氢和氮释放量的数据。对实验数据的分析包括使用一维（1D）模型和Fluent。结果表明，由于许多具有相反作用的因素，生物质燃料产生的颗粒燃尽值可与煤相比，主要是其较高的挥发性物质增加了燃尽，而其较高的水分含量和较大的粒径则降低了燃尽值。 。根据一维模型，颗粒在DTF中的停留时间受颗粒大小的强烈影响，但考虑的尺寸分数数量对计算出的燃尽几乎没有影响。此外，在模型计算中，不适合使用Sauter平均直径或质量中值直径来表示生物质粒径。一维模型的预测倦怠与Fluent预测的倦怠相似。燃料的灰分组成表明，RDF可能具有一定的腐蚀和结渣潜力，而稻壳和稻草的使用可能会通过形成低熔点的灰烬而引起结渣。

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  • 来源
    《Fuel》 |2014年第ptaa期|809-824|共16页
  • 作者

    Gongliang Wang; R.B. Silva; J.L.T. Azevedo; S. Martins-Dias; M. Costa;

  • 作者单位

    Mechanical Engineering Department, Instituto Superior Tecnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal;

    Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior T6cnico, Universidade de Lisboa, Avenida Rovisco Pais,1049-001 Lisbon, Portugal;

    Mechanical Engineering Department, Instituto Superior Tecnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal;

    Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior T6cnico, Universidade de Lisboa, Avenida Rovisco Pais,1049-001 Lisbon, Portugal;

    Mechanical Engineering Department, Instituto Superior Tecnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal;

  • 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

    Drop tube furnace; Rice husk; Straw; Coffee husk; Refuse derived fuels;

    机译：落管炉;稻壳;稻草;咖啡果壳;垃圾衍生燃料;

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