Rheology of fly ashes from coal and biomass co-combustion
Rheology of fly ashes from coal and biomass co-combustion
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DOI：
10.1016/j.fuel.2010.04.019
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发表时间：
2010-10
期刊：
影响因子：
7.4
通讯作者：
S. Arvelakis;F. Frandsen
中科院分区：
文献类型：
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作者：
S. Arvelakis;F. Frandsen
与煤相比，大多数生物质燃料中存在大量碱金属、氯和硫，可能会造成与灰烬有关的严重问题，如沉积、结块和/或腐蚀。在中试规模的PF锅炉上，研究了不同煤/生物质混烧飞灰的粘度特性。产生的数据提供了关于灰烬的熔化及其流动特性的信息，作为温度的函数，可用于修改锅炉的温度分布，以避免结渣。秸秆共烧降低了灰分的粘度，从而提高了灰分的粘性。由于木灰的组成和煤/生物质混合物中木材的比例很低，木材混烧的影响很小。
The presence of large amounts of alkali metals, chlorine and sulphur in most biomass fuels – compared to coal – can create serious ash-related problems such as deposition, agglomeration and/or corrosion. This paper discusses the viscosity characteristics of fly ash from the co-combustion of various coal/biomass blends in a pilot scale pf-boiler. The produced data provide information on the melting of the ash and its flow characteristics, as a function of temperature, which may be used to modify the temperature profile of the boiler in order to avoid slagging. Straw co-firing lowers the ash viscosity leading to higher stickiness of the ash particles. Wood co-firing has only minor effects, due to the composition of wood ash and the low percentage of wood in the coal/biomass blend.