| 循环流化床排烟脱硫模型 |
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| 引用本文： | 谭忠超,项光明,陈昌和,徐旭常.循环流化床排烟脱硫模型[J].环境科学,1999,20(3):21-25. |
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| 作者姓名： | 谭忠超 项光明 陈昌和 徐旭常 |
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| 作者单位： | 清华大学煤的清洁燃烧国家重点实验室 |
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| 摘 要： | 以微元分析为基础并建立数据模型，分析了床内气、液相温度的变化对液滴 蒸发和对就内传热质过程的影响以及床内气、液相温度沿床高的变化趋势，并且模拟了排烟循环流化床脱硫过程，对钙硫摩尔比Ｃａ／Ｓ，入口烟气温度Ｔｇ，雾化半径ｒ０等参数对脱硫率的影响进行了分析。并与实验结果进行了比较，在下硫比等于１．４，床内温度接近露点温度的情况下，脱硫效率可以达到９６％以上，计算结果与实验结果符合很好。
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| 关 键 词： | 循环流化床 排烟脱硫 液滴蒸发 脱硫率 煤燃烧 |
| 收稿时间： | 1998/10/29 0:00:00 |
Modeling on Circulating Fluidized Bed Flue Gas Desulfurization |
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| Tan Zhongchao,Xiang Guangming,Chen Changhe and Xu Xuchang.Modeling on Circulating Fluidized Bed Flue Gas Desulfurization[J].Chinese Journal of Environmental Science,1999,20(3):21-25. |
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| Authors: | Tan Zhongchao Xiang Guangming Chen Changhe and Xu Xuchang |
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| Institution: | State Key Laboratory of Clean Combustion of Coal, Tsinghua University, Beijing 100084, China;State Key Laboratory of Clean Combustion of Coal, Tsinghua University, Beijing 100084, China;State Key Laboratory of Clean Combustion of Coal, Tsinghua University, Beijing 100084, China;State Key Laboratory of Clean Combustion of Coal, Tsinghua University, Beijing 100084, China |
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| Abstract: | On the basis of element analysis,a computational model is formed,and the influence of the temperature of liquid and gaseous phases on the processes of droplet evaporation and the heat and mass transfer are analyzed.The change tendency of temperatures of the liquid and gaseous phases are also analyzed as the function of the height of the bed.At the same time,the process of circulating fluidized bed flue gas desulfurization is modeled.The influence of the key parameters such as calciumtosulfur ratio (Ca/S),inlet gas temperature and the diameter of spray on the efficiency of desulfurization are analyzed.At the end,the computational results are compared with the experimental ones.In experiments the desulfurization efficiency can reach 96% under the conditions of calciumtosulfur ratio (Ca/S)=14,approachtosaturation temperature,etc.The comparison shows that the results fit well. |
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| Keywords: | circulating fluidized beds flue gas desulfurization droplet evaporation heat and mass transfer desulfurization efficiency |
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