平焰炉内燃气管位置对NO_x生成特性的影响

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。

Effect of Position of Burning Nozzle on Generating Characteristics of NOx in Flat Flame Stove

NOx control is the key point of dean combustion technology in gas stove. The key problem is the mechanism of NOx formation while turbulent combustion. The effect of Position of burning nozzle on flame features, temperature field and generating characteristic of NOx in flat flame furnace was studied by means of gas stove and analytical instruments for flue gas. Temperature in central plane and concentration of NOx in flat flame furnace were measured accurately. And characteristics of flat flame were analyzed during different Position of burning nozzle. The results show that justifying lowering of Position of burning nozzle can improve the uniformity of temperature field in combustion area and in the top of furnace, and therefore reduce the NOx in flue gas.