| 直流煤粉射流着火稳定性指数研究 |
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| 引用本文： | 王伟,汪淑奇,钟万里,刘志丽,邓平.直流煤粉射流着火稳定性指数研究[J].电力科学与技术学报,2014(1):80-85. |
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| 作者姓名： | 王伟 汪淑奇 钟万里 刘志丽 邓平 |
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| 作者单位： | [1] 广东电网公司 电力科学研究院,广东 广州510080 [2] 长沙理工大学 能源与动力工程学院,湖南 长沙410004 |
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| 基金项目： | 南方电网公司科技项目（K-GD2012-379;K-GD2012-388） |
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| 摘 要： | 基于炉膛内煤粉射流微元段，分析煤粉射流卷吸、挥发分与焦炭燃烧以及辐射传热引起的质量与热量变化，建立煤粉射流中氧质量浓度变化、煤焦颗粒直径变化、煤粉颗粒温度变化及一次风射流温度变化微分方程。在此基础上，提出煤粉射流着火稳定性指标的定量计算方法，对于在实际运行中预测与诊断燃烧状态、优化燃烧、预防熄火具有重要意义。
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| 关 键 词： | 煤粉燃烧 燃烧射流 着火模型 着火距离 燃烧稳定性指数 |
Research on combustion stability indexes of pulverized coal j et |
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| WANG Wei,WANG Shu-qi,ZHONG Wan-li,LIU Zhi-li,DENG Ping.Research on combustion stability indexes of pulverized coal j et[J].JOurnal of Electric Power Science And Technology,2014(1):80-85. |
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| Authors: | WANG Wei WANG Shu-qi ZHONG Wan-li LIU Zhi-li DENG Ping |
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| Affiliation: | WANG Wei, WANG Shu-qi, ZHONG Wan-li, LIU Zhi-li, DENG Ping |
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| Abstract: | Varying of mass and heat in a pulverized coal j et microsegment of coal-fired boilers caused by entrainment,combustion of volatile matter and coke,and radiation heat transfer was analyzed in this paper.Differential equations of oxygen concentration variation,diameter variation of particle coke,particle temperature variation and gas temperature variation in pulverized coal j et were established.And some new ignition stability indexes for pulverized coal j et and its computa-tional method were put forward.Simulation results showed that the indexes are very useful for j udging and optimizing the stability of the combustion process and preventing flame-out. |
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| Keywords: | pulverized coal combustion pulverized coal j et ignition model ignition distance combustion stability index |
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