基于马尔文法测量空气辅助雾化喷嘴雾化特性的实验研究

Experimental Study on the Spray Performance of an Air-blast Atomizer with Spraytech

乏燃料后处理对核能产业的持续健康发展意义重大,其中硝酸铀酰雾化喷嘴是典型的水法乏燃料后处理工艺中的关键部件。本文以水替代硝酸铀酰作为雾化介质,基于马尔文喷雾激光粒度分析方法,测量了给定的空气辅助雾化喷嘴结构下,喷嘴在不同的空气入口压力下的雾化特性。结果发现,在雾化喷嘴入口气体压力分别为0.3 MPa、0.4 MPa和0.5 MPa三种情况下,雾滴从喷嘴喷射出来后成锥状发散,均能形成良好的雾化效果,随着雾化喷嘴入口气体压力的增大,索特平均直径在30~60μm的范围内逐渐减小,雾化锥角基本上都维持在35°~39°的范围内,基本变化不大。

The post-treatment of spent fuel is of great significance to the sustainable and healthy development of the nuclear energy industry.The uranyl nitrate atomization nozzle is a key component in the typical post-treatment process of spent fuel in water-based method.In this paper,water instead of uranyl nitrate was used as the atomization medium.Based on the Malvern spray laser particle size analysis method,the atomization characteristics of the nozzle under different air inlet pressure were measured with the given air-assisted atomizing nozzle structure.It was found that when the gas pressure at the inlet of the atomizing nozzle ranges from 0.3 MPa to 0.5 MPa,the droplets were ejected from the nozzle and then diverged in a cone shape,which could form a good atomization.As the gas pressure at the inlet of the nozzle increases,the average diameter of the Sauter diameter decreases gradually in the range of 30~60μm,and the atomization cone angle is maintained in the range of 35°~39°,which is almost no changes.