主次分级耦合的新型低氮燃烧器结构设计  

Structural Design of New Low-nitrogen Burner with Primary and Secondary Stage Coupling

作　　者：尚伟业 朱晓磊[1] 陆晓峰[1] SHANG Wei-ye;ZHU Xiao-lei;LU Xiao-feng(School of Mechanical and Power Engineering,Nanjing Tech University)

机构地区：[1]南京工业大学机械与动力工程学院

出　　处：《化工机械》2025年第1期134-141,178,共9页Chemical Engineering & Machinery

摘　　要：基于燃气、空气双分级技术,设计开发一种主次分级耦合的新型低氮燃烧器,建立仿真分析方法,并对其进行试验,验证了燃烧器结构的可行性及仿真分析方法的正确性。最后研究了不同负荷、过量空气系数对炉膛内的流场、温度场及NO_(x)排放的影响。结果表明:该燃烧器满足排放的负荷区间在82.4%~120.0%;过量空气系数在1.0~1.2时,操作弹性较大。在额定负荷内,过量空气系数适当增大,可进一步改善燃烧状态,使NO_(x)进一步下降;该燃烧器在100.0%负荷下降氮效果最明显,过量空气系数1.2时NO_(x)排放为24.3 mg/m^(3)。Based on the gas-air grading technology,a new low-nitrogen burner with hierarchical coupling was developed,including establishing a simulation analysis method and conducting a test to verify the burner structure’s feasibility of and this method’s correctness.Investigating the influences of both different loads and excess air coefficient on the flow field,temperature field and NO_(x)emission in the furnace was implemented to show that,the discharge load of the burner stays at 82.4%to 120.0%and the excess air coefficient ranges from 1.0 to 1.2,and the operation flexibility becomes large.In the rated load,the excess air coefficient increases properly,which can further improve the combustion state and reduce NO_(x).The nitrogen reduction effect of the burner is most obvious at 100.0%load,and the NO_(x)emission is 24.3 mg/m^(3)at excess air coefficient of 1.2.

关 键 词：天然气燃烧器 分级燃烧 数值模拟 NO_(x) 

分 类 号：TQ052.7[化学工程]