摘要
为了研究蓄热式钢包烘烤的空气和煤气的预热温度对高温空气燃烧过程的影响,耦合了烘烤过程中流体流动、换热和燃烧过程,用数值模拟方法建立了三维立体数学模型,利用计算流体力学软件Fluent,采用有限元差分法和修正速度—压力相耦合的算法Simple,计算了钢包内的燃烧现象,得出了在不同预热温度时,燃烧室内气体温度场和氧气浓度场的分布。结果表明,提高气体预热温度有利于加快燃烧进程,可提高炉内的整体温度及温度的均匀性,降低局部氧浓度,利用高的烘烤效率减少NO_x的排放。
In order to study the influence of air and gas preheating temperature in the regenerative ladle on the high temperature air combustion process, numerical simulation of gas flow, combustion and heat transfer in ladle during the baking process has been carried out. Using Fluent code with f＇mite difference and Simple methods, the characteristics of high temperature diluted air in the chamber under different preheating temperatures of inlet gases and oxygen concentra- tion field are analyzed numerically. Results evidence that higher temperature of inlet gases is favorable to the combustion process. Increasing the preheating temperature can increase the domain temperature and its uniformity and decrease the oxygen content of local flue in the chamber. The high baking efficiency can helps to reduce NOx emissions.
出处
《连铸》
2016年第4期12-17,共6页
Continuous Casting
关键词
蓄热式
高温空气
燃烧
NOX排放
数值仿真
regenerative
high temperature air
combustion
NOx emissions
numerical simulation
