直叶片离心喷雾气液反应器分离性能

Separation performance of straight blade centrifugal atomized gas-liquid reactor

为了解决目前单重态氧发生器存在的气体处理量小、气液反应面积小和气液分离不彻底的问题,设计了一种雾化技术与离心技术相结合的两级排液式直叶片离心喷雾气液反应器.首先采用CFD方法,对该反应器建立了计算模型,研究了反应器中连续相流场、离散相颗粒的运动特性,系统分析了粒径及转速对反应器分离性能的影响,获得了分离特性曲线.然后通过实验研究,分析了反应器在真实工况下的分离性能.综合研究表明,CFD模拟结果与实验结果比较吻合,CFD模型可用于该实验研究.反应器在5 mol/s的气体流量下对于粒径大于90μm的液滴在3000 r/min转速下分离效率100%,为单重态氧发生器的发展提供了参考.

In order to solve the problems of small gas handling capacity,small gas-liquid reaction area and low separation efficiency in singlet oxygen generator,a two-stage liquid-discharge straight blade centrifugal atomized gas-liquid reactor combined with atomization technology and centrifugal technology is designed.Firstly,the calculation model of the reactor is established by CFD method,and the motion characteristics of the continuous phase flow field and discrete phase particles in the reactor are studied.The influence of particle size and speed on the separation performance of the reactor is systematically analyzed,and the separation characteristic curve is obtained.Secondly,through the experimental research,the separation performance of the reactor under real working conditions is analyzed.Comprehensive research shows that CFD simulation results are in good agreement with experimental results,CFD model can be used in this experimental study.The efficiency of the reactor at 5 mol/s gas flow rate is 100%for droplets with particle size greater than 90μm at 3000 r/min speed,which provides reference for the development of singlet oxygen generator.