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控制氮氧化物(NOx)的生成是燃气炉燃烧过程洁净优化的重点。采用燃气试验炉和综合烟气分析仪等设备,研究了燃气管插入深度对平焰燃气炉内火焰特性、温度场和烟气中NOx生成特性的影响规律。准确测量了不同燃气管插入深度下炉内中心垂直剖面温度和烟气中NOx含量,分析了不同燃气管插入深度条件下炉内火焰特性。结果表明:适当降低插入深度可以使燃烧区域扩大并降低炉膛顶部局部高温区温度,进而有效降低烟气中NOx的含量。
Controlling the formation of nitrogen oxides (NOx) is the focus of the clean optimization of the gas furnace combustion process. The effects of gas pipe insertion depth on flame characteristics, temperature field and NOx formation characteristics in flue gas furnace were studied by using gas test furnace and integrated flue gas analyzer. The temperature of vertical center of furnace and NOx in flue gas were accurately measured under different insertion depths of gas pipes. The flame characteristics of furnace under different gas pipe insertion depths were analyzed. The results show that proper reduction of insertion depth can enlarge the combustion area and reduce the temperature in the local high temperature zone at the top of the furnace, thus effectively reducing the NOx content in the flue gas.