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在设计热功率为1 MW的热态模化实验台上,研究了带有燃尽风的径向浓淡双调风旋流燃烧器的运行特点,得到燃尽风布置的相对位置、一次风率、内二次风率、外二次风率以及二次风旋流强度对NOx生成和飞灰含碳量的影响.结果表明:旋流对冲的煤粉浓淡燃烧配合采用燃尽风(OFA)空气分级燃烧技术,对降低NOx的生成和减少飞灰含碳量非常有益;只有合理地设计和布置OFA燃烧器,才能在降低NOx生成量的同时,尽量减少飞灰含碳量;增大一次风率时,NOx的生成量先增加后减少,而飞灰含碳量先减少后增加;增加内、外二次风的旋流强度,NOx的生成量不断提高,而飞灰含碳量则呈现降低趋势.
On the design of thermal modeling lab with thermal power of 1 MW, the operating characteristics of the radial double-double-tone wind swirling burner with burnt-out wind were studied, and the relative position of the burnout wind arrangement, the primary wind rate , Internal secondary air rate, external secondary air rate and secondary air swirling intensity on NOx generation and fly ash carbon content were investigated.The results show that OFA (swirling combustion) Air staged combustion technology is very beneficial to reduce the formation of NOx and reduce the carbon content of fly ash. Only by reasonably designing and arranging OFA burners can the amount of NOx be reduced and the carbon content of fly ash reduced as much as possible. In the case of wind speed, the amount of NOx generated first increases and then decreases, while the carbon content of the fly ash decreases first and then increases; the swirling intensity and the amount of NOx generated by the internal and external secondary air increase, while the carbon content of the fly ash Showing a downward trend.