改进型撞击流反应器的颗粒混合特性  

Particle mixing characteristics of the improved impinging stream reactor

作　　者：刘雪晴[1] 鲁录义[1] 王坤[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《现代机械》2016年第5期7-10,共4页Modern Machinery

基　　金：国家重点基础研究发展计划项目(2015CB251504)

摘　　要：撞击流技术是现代社会强化过程的一种手段,具有巨大的发展潜力和应用前景。然而,在传统撞击流反应器中,颗粒混合效果不佳,导致相关反应进行不充分。为此一种入口速度动态变化的撞击流反应器应运而生,反应器的流场同样分为入口区、撞击区、出口区和漩涡区,但撞击面在几何中心处波动,从而使颗粒的混合区域扩展到整个反应器,并采用流体计算动力学对该改进型的撞击流反应器进行数值模拟。在保证平均流量相同的情况下,采用三角直线型的流速进入撞击流反应器,并与传统撞击流反应器进行分析对比。分析结果表明,颗粒的活动范围得到了有效地加强,与传统撞击流反应器有明显的优势,可以实现颗粒理想混合和相关反应充分进行。Impinging stream technology has great development potential and application prospects. However,in the traditional impinging stream reactor,particle mixing is ineffective,which resulted in insufficient reactions. Therefore,an impinging stream reactor with dynamic inlet velocity came into being. The flow field of the reactor is also divided into the entrance area,the impinging area,the exit area and the whirlpool area,but the impinging surface fluctuates around the geometric center,so that the particle mixing area is extended to the entire reactor. We carried out numerical simulation of the improved impinging stream reactor with computational fluid dynamics. With average flow remaining the same,we adopted linear change of the inlet flow rate,and compared the working condition with that of the traditional impinging stream reactor.The results showed that the activity range of the particles was enhanced,which had evident advantage over the traditional reactor,and could achieve ideal particle mixing and sufficient reaction.

关 键 词：撞击流模拟 撞击面 混合区域 运动轨迹 

分 类 号：TQ021.1[化学工程]