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首页> 外文期刊>Journal of environmental sciences >Chemical composition and physical properties of filter fly ashes from eight grate-fired biomass combustion plants
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Chemical composition and physical properties of filter fly ashes from eight grate-fired biomass combustion plants

机译：八座炉排燃烧生物质燃烧厂的粉煤灰的化学成分和物理性质

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For the handling, treatment and utilization of fly ash from biomass combustion its chemical composition and physical properties are important. In this study eight filter fly ashes from different grate-fired biomass combustion plants were investigated. In fly ash from straw combustion high concentrations of (K) were found, whereas in the fly ash from wood combustion the concentrations of Ca and Mg were higher. The average concentration of PO43- was similar in both types of fly ashes. In all wood fly ashes some measured heavy metal concentrations were above the limits for utilization. The straw fly ashes were much less contaminated and can be utilized. For wood fly ash most parameters showed little variation, except from one fly ash where the dust pre-separator is in poor condition. The average values were: mass median diameter 4.3 +/- 0.8 mu m, spread of particle size distribution 19 +/- 11, particle density 2620 +/- 80 kg/m(3) and angle of repose 50 +/- 1 degrees. The density of the straw fly ashes is lower (2260 +/- 80 kg/m(3)) and the spread of the size distribution is higher (72 +/- 24). For one straw combustion fly ash the values of the mass median diameter and the angle of repose were similar to the values of wood combustion fly ash, for the other straw fly ash the values differed considerably. While the particle size of this fly ash was much smaller, surprisingly the angle of repose was also lower. This can be attributed to the formation of small agglomerates in this fly ash, which were not disintegrated without a certain stress. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
机译：对于来自生物质燃烧的飞灰的处理，处理和利用，其化学组成和物理性质很重要。在这项研究中，研究了来自不同炉排生物质燃烧工厂的八种过滤粉煤灰。在秸秆燃烧产生的飞灰中发现高浓度的（K），而木材燃烧产生的飞灰中Ca和Mg的浓度更高。在两种类型的飞灰中，PO43-的平均浓度相似。在所有的木粉煤灰中，一些测得的重金属浓度都超过了使用极限。稻草粉煤灰的污染少得多，可以利用。对于木粉煤灰，除粉尘预分离器状况不佳的一种粉煤灰外，大多数参数几乎没有变化。平均值为：质量中值直径为4.3 +/- 0.8微米，粒径分布分布为19 +/- 11，颗粒密度为2620 +/- 80千克/米（3），休止角为50 +/- 1度。稻草粉煤灰的密度较低（2260 +/- 80 kg / m（3）），粒度分布的散布较高（72 +/- 24）。对于一种秸秆燃烧飞灰，质量中值直径和休止角的值与木材燃烧飞灰的值相似，对于另一种秸秆飞灰，其值相差很大。尽管这种粉煤灰的粒径小得多，但令人惊讶的是其休止角也更低。这可以归因于在该飞灰中形成了小的附聚物，这些附聚物在没有一定应力的情况下不会分解。 （C）2015年中国科学院生态环境研究中心。由Elsevier B.V.发布

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