| 循环流化床锅炉煤灰成分对其磨耗特性的影响 |
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| 引用本文： | 王进伟,赵新木,李少华,杨海瑞,吕俊复,岳光溪.循环流化床锅炉煤灰成分对其磨耗特性的影响[J].化工学报,2007,58(3):739-744. |
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| 作者姓名： | 王进伟 赵新木 李少华 杨海瑞 吕俊复 岳光溪 |
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| 作者单位： | 清华大学热能工程系 |
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| 摘 要： | 采用静态燃烧加冷态振筛磨耗方法对4种煤灰的磨耗速率常数进行了测量，发现同类煤灰的磨耗速率常数随其粒径的增加呈指数衰减的规律, 而相同粒径的不同煤灰的磨耗速率常数不同。通过分析煤灰组分，认为煤灰成分差异是造成这一现象的主要原因。基于煤灰成分主要由偏高岭土、石英、氧化铁和氧化钙组成的假设，采用灰色关联和神经网络分析了煤灰主要成分对磨耗速率常数的影响以及趋势，认为氧化钙、氧化铁以及偏高岭土含量的增加能够增大煤灰的磨耗速率常数，而煤灰的磨耗速率常数随氧化硅含量的增加而降低。
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| 关 键 词： | 磨耗速率常数 粒径 煤灰成分 灰关联 神经网络 |
| 文章编号： | 0438-1157（2007）03-0739-06 |
| 收稿时间： | 2006-1-13 |
| 修稿时间： | 2006-01-132006-03-08 |
Influence of coal ash components on attrition characteristics in circulating fluidized bed |
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| WANG Jinwei,ZHAO Xinmu,LI Shaohua,YANG Hairui,L Junfu,YUE Guangxi.Influence of coal ash components on attrition characteristics in circulating fluidized bed[J].Journal of Chemical Industry and Engineering(China),2007,58(3):739-744. |
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| Authors: | WANG Jinwei ZHAO Xinmu LI Shaohua YANG Hairui L Junfu YUE Guangxi |
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| Affiliation: | Department of Thermal Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Using the static coal combustion and ash cold sieving experimental method, the attrition rate constants of four kinds of coal ash were measured. It was found that the attrition rate constant of the same coal ash decayed exponentially with increasing particle size, while the attrition rate constants of different kinds of coal ash with the same size were different. The coal ash components were found to cause the above phenomena. By assuming the coal ash mainly composed of metakaolin, quartz, ferric oxide and calcium oxide, the influences and tendency of coal ash components on attrition rate constant were deduced with the gray system theory and neural network. The increase of metakaolin, ferric oxide and calcium oxide contents could increase the attrition rate constant, while the attrition rate constant would decrease with increasing amount of quartz. |
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| Keywords: | attrition rate constant particle size coal ash component grey systems theory neuralnetwork |
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