中心回燃天然气锅炉低氮燃烧的数值模拟  

Numerical Simulation of Low Nitrogen Combustion in Central Backfire Natural Gas Boiler

作　　者：徐志斌 田莉勤 张健[2] XU Zhibin;TIAN Liqin;ZHANG Jian(Shanghai BONUS Environmental Science and Technology Co.,Ltd,Shanghai 200090,China;School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海铂纳森环境科技有限公司,上海200090 [2]上海理工大学环境与建筑学院,上海200093

出　　处：《工业炉》2021年第3期42-44,65,共4页Industrial Furnace

摘　　要：采用低氮燃烧方法将中心回燃天然气锅炉的NOx降低至30 mg/m^(3)具有重要的意义。本文对2.5 t/h中心回燃天然气锅炉配置的低氮燃烧器进行数值模拟,模拟出燃烧后的烟气流程、烟气温度及NO_(x)。数值模拟结果表明:低氮燃烧器燃烧后,烟气流程正常,没有部分未经换热的高温烟气直接进入前烟箱;进入前烟箱的烟气平均温度为931℃,烟气温度正常不偏高;且NOx的排放≤30 mg/m^(3)。配置的低氮燃烧器符合中心回燃天然气锅炉安全性和低氮的要求。It is of great significance to use low nitrogen combustion method to reduce NOxof central natural gas boiler to 30 mg/m^(3). The low nitrogen burner of 2.5 t/h central backfire natural gas boiler is numerically simulated, and the flue gas flow, flue gas temperature and NO_(x) after combustion are simulated.The numerical simulation results show that the flue gas flow is normal after low nitrogen burner combustion,and no part of high temperature flue gas without heat exchange directly enters the front smoke box;the average temperature of flue gas entering the front smoke box is 931 ℃, the flue gas temperature is normal and not too high;and the NOxemission is ≤30 mg/m^(3). The low nitrogen burners meet the safety and low nitrogen requirements of the central backfire natural gas boiler.

关 键 词：中心回燃天然气锅炉 低氮燃烧器 数值模拟 

分 类 号：X701[环境科学与工程—环境工程] TK229.8[动力工程及工程热物理—动力机械及工程]