喷动床脱硫压力旋流喷嘴的雾化性能

雾化喷嘴是半干式喷动床的关键部件之一,其雾化性能直接影响脱硫效率。为了得到喷嘴雾化的详细信息,用激光粒度测试仪对空心锥压力旋流式喷嘴和实心锥压力旋流式喷嘴雾化性能进行了实验研究,得出不同类型、不同孔径的喷嘴的流量,索太尔直径DSM,雾滴粒径分布DSP等与压力的关系。实验表明:流量与压力平方根成正比关系;DSM与压力为e函数的单调减函数关系;实心锥喷嘴出口直径越大,雾滴粒径平均分布(■)越小,粒径分布范围越窄,雾化性能越好,空心锥喷嘴则变化不明显;压力增大,实心锥喷嘴的DSP变大,雾滴粒径在压力低时分布比较均匀。

Spray characteristics of pressure-swirl nozzle in desulfurization spouted bed

Atomizer is one of the key components in semi-dry spouted bed,whose atomization performance has directly impact on the efficiency of desulfurization. To obtain the detailed information of atomization,laser particle size measuring system was used to study the characteristics of both hollow and full cone pressure-swirl nozzle. The research shows that different types of nozzle,different sizes of the nozzle outlet aperture and working fluid pressure have different effects on the nozzle flow capacity,droplet size and its distribution. The study results show that volume flow is in direct relationship with the square root of the pressure; Sauter mean diameter (DSM) is in single-reduction function relation of e function with pressure. If the nozzle outlet aperture of full cone pressure-swirl nozzle is bigger,the droplet size distribution(■)becomes smaller. The narrower the range of droplet size distribution is,the better the atomization performance is. But the hollow cone pressure-swirl nozzle performance doesn′t change significantly. DSP of full cone pressure-swirl nozzle increases with increasing the pressure,and the droplet is well-distributed at lower pressure.