在我国电站锅炉中,具有旋流燃烧器的锅炉约占总容量的20%左右,大多采用轴向可动叶轮式旋流燃烧器(图1α)。在运行中调节叶轮位置,以改变直流风和旋流风的比例,从而达到调节二次风出口气流旋流强度、适应煤种变化的目的。实践表明,由于叶轮受热变形而不能调节,而且一、二次风混合强烈,温度峰值高,NO_(?)生成量大。据调查,其 NO_(?)约为 In China’s power plant boilers, boilers with swirl burners account for about 20% of the total capacity, mostly using axial movable vortex swirl burners (Figure 1a). Adjusting the position of the impeller in operation to change the proportion of DC wind and swirling wind, so as to achieve the purpose of adjusting the swirling intensity of the secondary air outlet airflow to adapt to coal changes. Practice shows that due to the deformation of the impeller can not be heated, and a strong secondary and secondary air mixing, high temperature peaks, NO_ (?) Generated large. According to the survey, its NO_ (?) Is about