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首页> 外文期刊>Energy Conversion & Management >Effect of particle size on the burnout and emissions of particulate matter from the combustion of pulverized agricultural residues in a drop tube furnace
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Effect of particle size on the burnout and emissions of particulate matter from the combustion of pulverized agricultural residues in a drop tube furnace

机译：粒径对在滴管式炉中燃烧农业粉状残留物燃烧和排放颗粒物的影响

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摘要

Milling and grinding biomass fuels for pulverized combustion in industrial furnaces can be very expensive. This study aims to evaluate the effect of the particle size on the burnout and emissions of particulate matter from the combustion of agricultural residues (wheat straw and rice husk) in a drop tube furnace. Initially, both agricultural residues were crushed and sieved below 1 mm and the resulting particle size distributions formed one size class here named < 1000 mu m In addition to this wide size class, three narrow particle size classes were prepared for each residue; namely, size classes 100-200 mu m, 400-600 mu m and 800-1000 mu m. Subsequently, all size classes of both agricultural residues were burnt in a drop tube furnace at 1100 degrees C. The data reported include profiles of temperature, particle burnout and particulate matter concentration and size distribution measured along the drop tube furnace. The main conclusions from this study are: (i) for both agricultural residues the size class 100-200 mu m presents the highest burnout values, followed by the size classes 400 -600 -mu m and 800-1000 mu m; (ii) the burnout values for the rice husk are higher than those for the wheat straw, and the total particulate matter emissions are rather similar for both agricultural residues, regardless of the size class; (iii) during the last stages of the combustion of the wheat straw occur particle fragmentation and the size classes 400-600 mu m and 800-1000 mu m are those that most contribute to this phenomenon, but particle fragmentation was not observed during the combustion of the rice husk;.(iv) the wheat straw size classes 100-200 mu m, 400-600 gm and < 1000 mu m present a bimodal particulate matter size distribution, while the class size 800-1000 mu m presents a unimodal one, but the rice husk size classes show all a unimodal particulate matter size distribution. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在工业炉中用于粉状燃烧的生物质燃料的研磨和磨碎可能非常昂贵。这项研究旨在评估粒径对在滴管式炉中燃烧农业残留物（麦秸和稻壳）的燃烧和颗粒物排放的影响。最初，将两种农业残留物均进行粉碎和筛分至1mm以下，所得的粒度分布形成了一个粒度类别，这里称为<1000μm。即尺寸等级为100-200微米，400-600微米和800-1000微米。随后，将所有尺寸的两种农业残留物在落管炉中于1100摄氏度下进行燃烧。报告的数据包括温度，颗粒燃尽以及沿落管炉测量的颗粒物浓度和尺寸分布的曲线。这项研究的主要结论是：（i）对于两种农残，尺寸等级为100-200μm的燃尽值最高，其次为尺寸等级400 -600-μm和800-1000μm； （ii）稻壳的燃尽值高于小麦秸秆，并且不论大小等级，两种农业残留物的总颗粒物排放量都非常相似； （iii）在小麦秸秆燃烧的最后阶段会发生颗粒破碎，并且尺寸级别为400-600μm和800-1000μm的颗粒最能造成这种现象，但是在燃烧过程中未观察到颗粒破碎（iv）尺寸为100-200μm，400-600 gm和<1000μm的小麦秸秆呈现双峰颗粒物粒径分布，而类型800-1000μm则呈现单峰，但稻壳尺寸类别显示所有单峰颗粒物尺寸分布。 （C）2017 Elsevier Ltd.保留所有权利。

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