论文部分内容阅读
同轴分层流旋流燃烧器是一种新型低NO_x燃烧器,可以通过1、2次风的适当配置,达到降低NO_x生成的目的。在自行开发设计的同轴旋转分层流旋流燃烧器上,对不同1、2次风旋流强度,1、2次风不同配比工况下NO_x的生成特性进行了研究。结果表明,1次风需要保持一定的旋流强度,并达到一定的水平,同时2次风配以适当的旋流强度,在一定的1次风率下,才能达到降低NO_x生成量的目的。在本文试验条件下,1次风旋流强度为0.35～0.47,同时2次风配以适当的旋流强度和1次风率,分别为1.30～1.50和33%,NO_x生成量低于其他工况。在运用旋转射流分层流原理的同时配以适当的机械方法,如增加扩口,NO_x生成与排放水平可以进一步适当降低。
Coaxial stratified flow swirling burner is a new type of low NO_x burner, which can achieve the purpose of reducing the formation of NO_x by the proper arrangement of the 1st and 2nd winds. On the coaxial rotary stratified flow swirling burner designed and developed by ourselves, the formation characteristics of NO_x under different mixing conditions of different 1, 2 and 2 times the wind intensity were studied. The results show that the primary air needs to maintain a certain swirling intensity and reach a certain level. Meanwhile, the secondary air with appropriate swirling intensity can achieve the purpose of reducing NO_x generation rate under a certain primary air flow rate. Under the experimental conditions, the intensity of primary air swirling is 0.35-0.47, while the secondary air is equipped with appropriate swirling intensity and primary air velocity of 1.30-1.50 and 33%, respectively, and the NO_x generation is lower than that of other work condition. In the application of rotating jet stratified flow principle coupled with appropriate mechanical methods, such as increasing the flaring, NO_x generation and emission levels can be further appropriately reduced.