惯性浓淡旋流燃烧器的原理及其在50t_h锅炉上的应用

在径向浓淡旋流煤粉燃烧器的基础上，本文提出了一种新型燃烧器－惯性浓淡旋流煤粉燃烧器，即在燃烧器一次风通道中加入煤粉浓缩器，并将其置于燃烧器喷口较近的位置，一次风粉经过煤粉浓缩器后，形成了由燃烧器中心向外煤粉浓度由高向低的分布趋势，依靠煤粉颗粒的惯性，将这种分布趋势一直保持到燃烧器出口。针对一台燃用烟煤的５０ｔ／ｈ煤粉炉的特点，给出了该燃烧器的布置，介绍了改造前后的运行情况。

The Theory of an Inertial Bias Swirl Burner and Its Application on a 50 t/h Boiler

On the basis of pulverized coal swirl burners of a radial bias combustion mode this paper proposes a new type of burner, the so called inertial bias combustio n (IBC) swirl burner. In such a burner a pulverized coal concentrator located n ear the burner nozzle has been incorporated in a primary air passage. After the primary air has been admitted through the pulverized coal concentrator there wi ll emerge from the burner center outward a distribution trend of pulverized coa l concentration ranging from a high to a low value. Thanks to the inertia of the pulverized coal particles such a distribution trend can be maintained right up to the burner outlet. A layout of the burners pertaining to a pulverized bitumi nous coal fired boiler of 59 t/h is presented with a brief account being given concerning the pre modification operating conditions.