Experimental investigation on the combustion and heat transfer characteristics of wide size biomass co-firing in 0.2 MW circulating fluidized bed
Experimental investigation on the combustion and heat transfer characteristics of wide size biomass co-firing in 0.2 MW circulating fluidized bed
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0.2 MW循环流化床宽尺寸生物质混烧燃烧及传热特性实验研究
DOI：
10.1016/j.applthermaleng.2012.12.009
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发表时间：
2013-04
影响因子：
6.4
通讯作者：
Xu, Tongmo
中科院分区：
文献类型：
--
作者：
Sun, Peng;Hui, Shi'en;Gao, Zhenxing;Zhou, Qulan;Tan, Houzhang;Zhao, Qinxin;Xu, Tongmo
为了减少废气排放，提高循环流化床的燃烧效率和床壁传热，采用大粒径粉碎生物质颗粒进行共烧。在一个0.2 MW中试循环流化床（CFB）试验中，研究了生物质配比对床层压力、温度分布、粉煤灰损失、传热和气体污染物排放的影响。结果表明：生物质比例越高，轴向温度分布越均匀，粉煤灰损失越小，气体排放越少，床壁传热越好，但生物质比例对床层压力和孔隙度的影响较小；随着生物量份额的增加，稠密区上部形成的还原性气氛增强，下部温度降低。这抑制了稠密区NO、N2O和so2的生成，同时促进了它们的还原，因此获得了更低的气体排放。在密区产生的直径较小的生物质炭在二次风引入后可以很快被消耗掉，从而降低了飞灰损失。生物质燃烧产生的细颗粒使团簇与水壁之间的热传导气层厚度减小，传热系数提高10%。
In order to reduce emissions and enhance combustion efficiency and bed-to-wall heat transfer in circulating fluidized bed (CFB), wide size crushed biomass pellets were adopted for co-firing. The influences of biomass share on bed pressure, temperature profiles, fly ash loss, heat transfer, and gaseous pollutant emissions were studied by experiments performed in a 0.2 MW pilot scale CFB. Results show that with higher biomass share, more uniform axis temperature profiles, lower fly ash loss, less gaseous emission and higher bed-to-wall heat transfer can be achieved, but the effect of biomass share on bed pressure and porosity is minor. As biomass share increases, the reducing atmosphere formed at the upper part of the dense zone is enhanced, and the temperature at the lower part is decreased. This inhibits the formation of NO, N2O and SO2in the dense zone, while promotes their reduction, so lower gaseous emissions are obtained. Biomass char with small diameter that generated in the dense zone can be consumed soon after the introduction of secondary air, which achieves lower fly ash loss. The fine particles yielded from biomass combustion reduce the thickness of the heat-conduction gas layer between clusters and water wall, and the heat transfer coefficient can be improved by 10%.
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影响因子：
4.7
作者：
P. Basu
通讯作者：
P. Basu
影响因子：
--
作者：
M. Brewster
通讯作者：
M. Brewster
DOI：
10.1007/978-94-011-5842-8
发表时间：
1997-10
期刊：
--
影响因子：
--
作者：
O. Molerus;Karl-Ernst Wirth
通讯作者：
O. Molerus;Karl-Ernst Wirth
影响因子：
5.3
作者：
Hairui Yang;Hai Zhang;Shi Yang;G. Yue;Jun Su;Z. Fu
通讯作者：
Hairui Yang;Hai Zhang;Shi Yang;G. Yue;Jun Su;Z. Fu
影响因子：
10.4
作者：
D. Boavida;I. Gulyurtlu;L. S. Lobo;I. Cabrita
通讯作者：
D. Boavida;I. Gulyurtlu;L. S. Lobo;I. Cabrita