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Fouling propensities of blended coals in pulverized coal-fired power station boilers

机译：煤粉电站锅炉中混煤的结垢倾向

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This paper presents the experimental results on the fouling propensity of five pairs of blended coals (19 coals and blends) tested in the Australian Coal Industry Research Laboratory (ACIRL) furnace. The results showed that the coal D has the highest fouling propensity among tested coals and blends. A parameter, growth rate (mm/h), is used to numerically rank the fouling propensity based on photos of fouling deposits taken over a period of lest time. The growth rate correlates the fouling propensity better than the build up rate or the fouling coefficient. Five empirical fouling indices are examined against the fouling propensities of the above 19 coals and blends, and another 10 coals and blends previously tested in the Energy and Environmental Research Cooperation (EER) furnace. The linear correlation between the flue gas exit temperature/initial deformation temperature (FGET/IDT(ox.)), a measure of the overall heat transfer in the furnace, and the Na_2O, g/GJ, is proved to be a good tool for predicting the fouling propensity of coals. There is also a relationship between the FGET and the growth rate.
机译：本文介绍了在澳大利亚煤炭工业研究实验室（ACIRL）炉中测试的五对混合煤（19种煤和混合煤）的结垢倾向的实验结果。结果表明，在测试的煤和掺合物中，煤D的结垢倾向最高。根据在一段时间内拍摄的结垢照片，使用增长率（mm / h）参数对结垢倾向进行数值排名。与结垢率或结垢系数相比，增长率与结垢倾向的相关性更好。针对以上19种煤和掺合物以及之前在能源与环境研究合作（EER）炉中测试的另外10种煤和掺合物的结垢倾向，检查了五个经验结垢指数。烟气出口温度/初始变形温度（FGET / IDT（ox。））之间的线性相关性是衡量炉内总传热的指标，而Na_2O g / GJ被证明是一种很好的工具预测煤的结垢倾向。 FGET与增长率之间也存在关系。

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