|本期目录/Table of Contents|

[1]祝鑫阳,张立麒,毛志慧,等.水蒸气对煤粉MILD 燃烧特性影响的数值模拟[J].燃烧科学与技术,2017,(04):365-371.[doi:DOI 10.11715/rskxjs.R201608014]
 Zhu Xinyang,Zhang Liqi,Mao Zhihui,et al.Numerical Simulation of Effects of Water Vapor Effects on PulverizedCoal MILD Combustion Characteristics[J].Journal of Combustion Science and Technology,2017,(04):365-371.[doi:DOI 10.11715/rskxjs.R201608014]
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水蒸气对煤粉MILD 燃烧特性影响的数值模拟()
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《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2017年04
页码:
365-371
栏目:
出版日期:
2017-08-15

文章信息/Info

Title:
Numerical Simulation of Effects of Water Vapor Effects on Pulverized Coal MILD Combustion Characteristics
作者:
祝鑫阳张立麒毛志慧段艳松郑楚光
华中科技大学煤燃烧国家重点实验室,武汉 430074
Author(s):
Zhu XinyangZhang LiqiMao ZhihuiDuan YansongZheng Chuguang
State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China
关键词:
水蒸气流速MILD 燃烧气化反应NO排放
Keywords:
water vaporvelocityMILD combustiongasification reactionNO emission
分类号:
TK16
DOI:
DOI 10.11715/rskxjs.R201608014
文献标志码:
A
摘要:
基于IFRF 炉子结构,在一次风喷口与二次风喷口之间增加一个水蒸气喷口,通过数值模拟方法研究了 水蒸气流速对煤粉MILD 燃烧的影响.结果表明,随着水蒸气流速的增加,一次风与二次风混合点提前,炉内烟 气湍流混合作用增强,火焰尺寸增大,温度分布更为均匀.水蒸气流速的增加促进了碳的氧化反应并抑制了气化 反应,但峰值温度和总的NO 排放量分别下降了57,K 和23×10-6,前者是由于烟气的稀释作用大于氧化放热作 用,而后者则是由于气化作用生成的还原性物质抑制了NO 的生成.
Abstract:
Based on the pilot-scale furnace of IFRF,two steam are symmetrically added nozzles between the primary air nozzle and the secondary air nozzle,and the effects of water vapor velocity on the characteristics of pulverized coal MILD combustion are investigated by numerical simulation.The study shows that with the increase of water vapor velocity,the mixed point of primary air and secondary air meets in advance,the turbulent mixing of flue gas is enhanced,the flame size increases and the temperature distribution becomes more uniform.It is worth noting that the increase of water vapor velocity promotes the carbon oxidation reaction and suppresses the carbon gasification reaction,but the peak temperature and the total NOx emissions are reduced by 57,K and 23×10-6 , respectively.The former is due to the fact that the effect of flue gas dilution is greater than the effect of exothermic oxidation,while the latter is due to the fact that the reducing substance produced by the gasification reaction suppresses NO formation.

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备注/Memo

备注/Memo:
收稿日期:2016-09-18. 基金项目:国家重点研发计划资助项目(2016YFE0102500). 作者简介:祝鑫阳(1992— ),男,硕士研究生,1165257091@qq.com. 通讯作者:张立麒,男,博士,副教授,lqzhang@mail.hust.edu.cn.
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