| 天然气再燃烧降低NO_x的数值模拟研究 |
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| 引用本文： | 陈朝晖,张忠孝.天然气再燃烧降低NO_x的数值模拟研究[J].电站系统工程,2008,24(5). |
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| 作者姓名： | 陈朝晖 张忠孝 |
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| 作者单位： | 上海理工大学动力工程学院 |
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| 摘 要： | 对实验用管式炉进行数值模拟计算。采用标准k-ε湍流模型、NOx生成模型,对管式锅炉内的流场情况、管式锅炉内的NOx的浓度进行模拟计算。模拟计算表明,提高再然区温度有利于NOx的还原,再燃区过量空气系数越小越有利于NOx的还原,再燃天然气数量的增加可降低NOx浓度的排放,同时再燃天然气的比例提高到一定的水平,再增加天然气数量后对还原NOx的影响逐步减小。
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| 关 键 词： | 管式炉 天然气再燃 NOx还原 数值模拟 |
Numerical Simulation about Natural Gas Reburn to Reduces Nox |
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| CHEN Zhao-hui,ZHANG Zhong-xiao.Numerical Simulation about Natural Gas Reburn to Reduces Nox[J].Power System Engineering,2008,24(5). |
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| Authors: | CHEN Zhao-hui ZHANG Zhong-xiao |
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| Abstract: | Based on CFD,the process of coal reburning in a boiler was simulated.The effect of some key factor such as reburn zone temperature,stoichiometric coefficient and reburn rate on NOx formation regulation was studied on a one-dimensional test system with multi-function such as air stage and fuel reburning.The results showed that the NOx reduction efficient increased with the increase of the reburn zone temperature.There existed an optimum value(0.8~0.9) for reburn zone stoichiometric coefficient.Given the economical reason,the best rate of reburning is 20%. |
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| Keywords: | boiler natural gas reburn NOx reduction numerical simulation |
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