过量空气系数和水蒸气对管式加热炉燃烧特性的影响研究
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摘要
文章分别在过量空气系数α为1.05、1.10、1.15、1.20、1.25、1.30的6种工况下和氧化剂中添加的水蒸气体积分数φ_(H2)O为0、0.03、0.05、0.08、0.10、0.15的6种工况下,利用计算流体动力学(computational fluid dynamics,CFD)软件对燃气分级燃烧的管式加热炉进行了研究,分析了炉膛内的温度分布、NO密度分布以及NO排放情况。结果表明,α=1.10时,低氮燃烧效果较好;φ_(H2)O
A numerical simulation of the combustion process in tube furnace, which was based on the fuel staged burner, was carried out by using the computational fluid dynamics(CFD) software Fluent. Some related parameters, such as temperature, NO density and NO emission, were obtained under different excess air factor α of 1.05, 1.10, 1.15, 1.20, 1.25 and 1.30, respectively. The results showed that NO emission could be reduced effectively with α=1.10. This paper also studied the temperature distribution, NO density in the furnace and NO emission when adding different volume fraction of water vapor φ_(H2)O of 0, 0.03, 0.05, 0.08, 0.10 and 0.15 into the oxidant, respectively. The results showed that the temperature field was uniform in the furnace and NO emission was relatively low with φ_(H2)O
A numerical simulation of the combustion process in tube furnace, which was based on the fuel staged burner, was carried out by using the computational fluid dynamics(CFD) software Fluent. Some related parameters, such as temperature, NO density and NO emission, were obtained under different excess air factor α of 1.05, 1.10, 1.15, 1.20, 1.25 and 1.30, respectively. The results showed that NO emission could be reduced effectively with α=1.10. This paper also studied the temperature distribution, NO density in the furnace and NO emission when adding different volume fraction of water vapor φ_(H2)O of 0, 0.03, 0.05, 0.08, 0.10 and 0.15 into the oxidant, respectively. The results showed that the temperature field was uniform in the furnace and NO emission was relatively low with φ_(H2)O
引文
[1] 钱家麟.管式加热炉[M].2版.北京:中国石化出版社,2003.
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[3] LIU B,WANG Y H,XU H.Numerical study of the effect of staged gun and quarl on the performance of low-NOx burners[J].Journal of Energy Engineering,2015,142(3):04015040.
[4] KIM H Y,BAEK S W,KIM S W.Investigation of fuel lean reburning process in a 1.5 MW boiler[J].Applied Energy,2012,89(1):183-192.
[5] 孙保民,王顶辉,段二朋,等.空气分级燃烧下NOx生成特性的研究[J].动力工程学报,2013,33(4):261-266.
[6] 陈东,卫海桥,王菁.大型燃气乙烯裂解炉燃烧过程的优化模拟[J].石油学报(石油加工),2012,28(5):865-870.
[7] 胡满银,乔欢,杜欣,等.烟气再循环对炉内氮氧化物生成影响的数值模拟[J].华北电力大学学报(自然科学版),2007,34(6):77-82.
[8] 孙琦.甲烷高温贫氧燃烧系统的模拟优化[D].青岛:中国海洋大学,2013,23-24.
[9] 蒋绍坚.高温低氧燃烧技术与应用[M].长沙:中南大学出版社,2010:9-10.
[2] TONI A D,HAYASHI T,SCHNEIDER P.A reactor network model for predicting NOx emissions in an industrial natural gas burner[J].Journal of the Brazilian Society of Mechanical Sciences and Engineering,2013,35(3):199-206.
[3] LIU B,WANG Y H,XU H.Numerical study of the effect of staged gun and quarl on the performance of low-NOx burners[J].Journal of Energy Engineering,2015,142(3):04015040.
[4] KIM H Y,BAEK S W,KIM S W.Investigation of fuel lean reburning process in a 1.5 MW boiler[J].Applied Energy,2012,89(1):183-192.
[5] 孙保民,王顶辉,段二朋,等.空气分级燃烧下NOx生成特性的研究[J].动力工程学报,2013,33(4):261-266.
[6] 陈东,卫海桥,王菁.大型燃气乙烯裂解炉燃烧过程的优化模拟[J].石油学报(石油加工),2012,28(5):865-870.
[7] 胡满银,乔欢,杜欣,等.烟气再循环对炉内氮氧化物生成影响的数值模拟[J].华北电力大学学报(自然科学版),2007,34(6):77-82.
[8] 孙琦.甲烷高温贫氧燃烧系统的模拟优化[D].青岛:中国海洋大学,2013,23-24.
[9] 蒋绍坚.高温低氧燃烧技术与应用[M].长沙:中南大学出版社,2010:9-10.