Effect of Bed Pressure Drop on Performance of a CFB Boiler
Effect of Bed Pressure Drop on Performance of a CFB Boiler
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DOI：
10.1021/ef900025h
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发表时间：
2009-05
期刊：
影响因子：
5.3
通讯作者：
Hairui Yang;Hai Zhang;Shi Yang;G. Yue;Jun Su;Z. Fu
中科院分区：
文献类型：
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作者：
Hairui Yang;Hai Zhang;Shi Yang;G. Yue;Jun Su;Z. Fu
研究了床层压降和床层存量对循环流化床锅炉性能的影响。应用状态规范设计理论，通过降低床层存量和控制床层质量，改造了传统循环流化床锅炉炉内气固流化状态，使其在较低的床层压降下运行。通过理论分析，提出存在一个理论最佳床层压降值，在该值附近锅炉运行可达到最大燃烧效率，同时受热面磨损和风机能耗显著降低。在75 t/h循环流化床锅炉上进行的现场试验验证了分析的正确性。在锅炉满负荷运行时，当床层压降由7.3 kPa降低到3.2 kPa时，炉膛下部密相区高度降低，但对炉膛上部固体颗粒浓度分布和固体颗粒流量几乎没有影响。因此，平均…
The effect of bed pressure drop and bed inventory on the performances of a circulating fluidized bed (CFB) boiler was studied. By using the state specification design theory, the fluidization state of the gas−solids flow in the furnace of conventional CFB boilers was reconstructed to operate at a much lower bed pressure drop by reducing bed inventory and control bed quality. Through theoretical analysis, it was suggested that there would exist a theoretical optimal value of bed pressure drop, around which the boiler operation can achieve the maximal combustion efficiency and with significant reduction of the wear of the heating surface and fan energy consumption. The analysis was validated by field tests carried out in a 75 t/h CFB boiler. At full boiler load, when bed pressure drop was reduced from 7.3 to 3.2 kPa, the height of the dense zone in the lower furnace decreased, but the solid suspension density profile in the upper furnace and solid flow rate were barely influenced. Consequently, the average ...