NOx的控制是燃气炉燃烧过程洁净优化的重点，其关键问题就在于湍流燃烧过程中NOx的生成机理。本文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，并分析了不同燃气管插入深度条件下炉内火焰特性。研究结果表明：适当降低插入深度可以使燃烧区和炉膛顶部温度更加均匀，进而有效降低烟气中NOx的含量。
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.
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