Micromixing efficiency in a T-shaped confined impinging jet reactor  

T型撞击流反应器的微观混合性能研究(英文)

作　　者：高正明 韩敬 包雨云 李志鹏 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology

出　　处：《Chinese Journal of Chemical Engineering》2015年第2期350-355,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21206002,21121064,20990224);the State Key Laboratory of Chemical Engineering(SKL-Ch E-13A03)

摘　　要：Confined impinging jet reactor(CIJR)offers advantages for chemical rapid processes and has become an important new reactor used in the chemical industry.The micromixing efficiency in a T-shaped CIJR for two tubes of inner diameter of 3 mm was studied by using a parallel competing iodide–iodate reaction as the working system.In this work,the effects of different operating conditions,such as impinging velocity and acid concentration,on segregation index were investigated.In addition,the effects of the inner nozzles diameter and the distance L between the jet axis and the top wall of the mixing chamber on the micromixing efficiency were also considered.It is concluded that the best range of L in this CIJR is 6.5–12.5 mm.Based on the incorporation model,the estimated minimum micromixing time tmof CIJR approximately equals to 2×10-4s.These experimental results indicate clearly that CIJR possesses a much better micromixing performance compared with the conventional stirred tank(micromixing time of 2×10-3to 2×10-2s).Hence,it can be envisioned that CIJR has more promising applications in various industrial processes.Confined impinging jet reactor（CIJR）offers advantages for chemical rapid processes and has become an important new reactor used in the chemical industry.The micromixing efficiency in a T-shaped CIJR for two tubes of inner diameter of 3 mm was studied by using a parallel competing iodide–iodate reaction as the working system.In this work,the effects of different operating conditions,such as impinging velocity and acid concentration,on segregation index were investigated.In addition,the effects of the inner nozzles diameter and the distance L between the jet axis and the top wall of the mixing chamber on the micromixing efficiency were also considered.It is concluded that the best range of L in this CIJR is 6.5–12.5 mm.Based on the incorporation model,the estimated minimum micromixing time tmof CIJR approximately equals to 2×10-4s.These experimental results indicate clearly that CIJR possesses a much better micromixing performance compared with the conventional stirred tank（micromixing time of 2×10-3to 2×10-2s）.Hence,it can be envisioned that CIJR has more promising applications in various industrial processes.

关 键 词：Impinging jet reactor MICROMIXING Segregation index Incorporation model 

分 类 号：TQ052[化学工程] O358[理学—流体力学]