提高燃煤超细颗粒物聚并效率的撞击流场仿真  

Impinging Stream Simulation for Improving Coalescence Efficiency of Submicron Particles in Coal Combustion Process

作　　者：王奎[1] 刘雪晴[1] 鲁录义[1] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉市430074

出　　处：《电力建设》2016年第11期123-128,共6页Electric Power Construction

基　　金：国家重点基础研究发展计划项目(2015CB251504)~~

摘　　要：采用颗粒物聚并的方法可以有效地减少燃煤电厂超细颗粒物排放,对于超细颗粒物的聚并过程,增加微颗粒的停留时间可显著提高微颗粒物的聚并效率。提出改进型撞击流应用于聚并反应器,并改进了传统的撞击流流型以提高微颗粒的停留时间。气固两相流数值仿真研究结果表明,与传统的撞击流相比,改进的撞击流在聚并反应器中能扩大超细颗粒在流场中的活动范围,并能极大地增加超细颗粒在流场中的停留时间,可显著提高燃煤超细颗粒物的聚并效率。The application of particle coalescence can effectively reduce the emission of submicron particles from coal-fired power plants. During the process of submicron particles coalescence,increasing the residence time of the particles can significantly improve the efficiency of submicron particles coalescence. This paper presents a kind of improved impinging stream applied in the coalescence reactor,and improves the flow pattern of traditional impinging stream in order to increase the residence time of submicron particles. The numerical simulation results of gas-solid two-phase flow show that compared with the traditional impinging stream,in the coalescence reactor,the residence time and the activity scope of the submicron particles in the flow field has been greatly increased by the improved impinging stream,which can finally dramatically increase the efficiency of submicron particles coalescence.

关 键 词：超细颗粒物 聚并 撞击流 停留时间 

分 类 号：TM621[电气工程—电力系统及自动化]