| 循环流化床锅炉飞灰的水活化与脱硫 |
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| 引用本文： | 徐猛,李登新,王启民,吕俊复,岳光溪.循环流化床锅炉飞灰的水活化与脱硫[J].燃烧科学与技术,2004,10(1):62-65. |
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| 作者姓名： | 徐猛 李登新 王启民 吕俊复 岳光溪 |
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| 作者单位： | 清华大学热能工程系,北京,100084 |
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| 基金项目： | 国家重点基础研究发展规划资助项目(G1999022204). |
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| 摘 要： | 循环流化床飞灰中含有较高的氧化钙和未燃碳，将飞灰水活化后能提高飞灰中钙的利用率．在热重分析仪上，对不同条件下水活化的飞灰脱硫性能进行了实验研究．结果表明，水与飞灰混合干燥条件对其脱硫效果没有明显的影响，而水钙摩尔比是活化程度的最大影响因素，活化水钙摩尔比为．4是较好的活化飞灰脱硫效果的下限．通过比较飞灰水活化前后的孔径结构和比表面，探讨了含钙飞灰脱硫效果改善的机理．
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| 关 键 词： | 飞灰 水化 脱硫 比表面 |
| 文章编号： | 1006-8740(2004)01-0062-04 |
| 修稿时间： | 2003年10月31 |
Hydration and Desulphurization of Fly Ash of Circulating Fluidized Bed Boiler |
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| Abstract: | The content of CaO and unburnt carbon in the fly ash of a circulating fluidized bed (CFB) boiler is very high when the fuel is hard coal. The hydration of water and fly ash can improve the scope of utilization of calcium. The desulphurization characteristics of the hydrated fly ash were examined in TGA and compared with the original fly ash. The results show that the temperature of drying the mixture of fly ash and water does not affect the SO_2 removal appreciably which obviously depends on the molecular ratio of water to calcium. The minimum molecular ratio of water to calcium is (about) 0.4 for a better SO_2 removal. Furthermore, the reactivation mechanism of hydrated fly ash was also discussed by comparing the pore radius and specific surface. |
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| Keywords: | fly ash hydration desulphurization surface structure |
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