常温空气无焰燃烧中CO生成的研究

An Investigation of CO Generation during Flameless Combustion of Normal-temperature Air

研究了常温空气无焰燃烧中CO的生成规律。常温空气无焰燃烧在整个炉膛内同时发生弥散燃烧反应，炉膛内燃烧气混合均匀，燃烧反应稳定。因而CO的生成量低。实验研究和计算分析表明：CO主要生成在离燃烧器喷口约600—3000mm、6400mm的柱状空间内，在柱状空间外的其它区域，燃烧充分，CO几乎为零。过量空气系数与容积热负荷时烟气中CO生成量的影响不大。与传统的有焰燃烧和近代的高温空气无焰燃烧相比，常温空气无焰燃烧中CO生成低，且排放稳定。

Investigated is the law governing CO generation during the flameless combustion of normal-temperature air.The above-mentioned combustion can be accompanied by a dispersion combustion reaction in the furnace as a whole. As the combustion gases can be blended in the furnace uniformly and the combustion reaction is stable, a low quantity of CO is produced. An experimental study as well as calculations and analyses indicate that CO is mainly generated in a cylindrical space of 400 mm about 600 mm～3000 mm away from the burner spray nozzle. In other areas outside the cylindrical space, the combustion proceeds fully and almost no CO is produced. Excess air factor and volumetric heat release rate have little effect on the generation quantity of CO in flue gases. Compared with traditional flame combustion and present-day high-temperature air flameless combustion, the flameless combustion of normal-temperature air features a low CO generation quantity and stable emissions.