A CFD model for gas uniform distribution in turbulent flow for the production of titanium pigment in chloride process  

作　　者：Yadong Li Gang Xie Ting Lei Chongjun Bao Lin Tian Yanqing Hou 

机构地区：[1]State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China [2]Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Kunming 650093, China [3]Kunming Metallurgical Research Institute, Kunming 650031, China [4]Key Laboratory of Pressure Hydrometallurgy Technology Associated Non-Ferrous Metal Resources, Kunming 650031, China [5]Kunming Metallurgy College,Kunrning 650-033, China

出　　处：《Chinese Journal of Chemical Engineering》2016年第6期749-756,共8页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21566015,51404123);the Applied Basic Research Projects of Yunnan(2013FC002,2013FC003,2015FB126);the Provincial Personnel Training Funds of Yunnan Province of China(KKSY201352109,KKPT201563013)

摘　　要：The fluid dynamic behavior of feeding gas （TiCI4） in an annular channel affects the combination of 02 and TiCI4 in an oxidation reactor, a key piece of equipment in titanium pigment production. The numerical procedure was validated by a 3-dimensional gas flow in the annular channel. Applying the validated model, the flow character- istics of TiCl4 in the oxidation reactor with a tangential inlet were simulated and characterized. The flow distribu- tion with five rectifying rings of different structure was simulated and analyzed. The results showed that the rectifying ring improved the distribution uniformity of the pressure and outlet velocity. Compared to the original case without a rectifying ring, the non-uniformity of the pressure and outlet velocity could be reduced by up to 91% and 69% respectively. The rectifying ring #5, which can be installed and adjusted easily, is more effective in realizing even distribution. In addition, installation of the rectifying ring effectively reduced the circulating flow in an annular channel as well as the total energy loss.The fluid dynamic behavior of feeding gas(Ti Cl4) in an annular channel affects the combination of O2 and Ti Cl4 in an oxidation reactor, a key piece of equipment in titanium pigment production. The numerical procedure was validated by a 3-dimensional gas flow in the annular channel. Applying the validated model, the flow characteristics of Ti Cl4 in the oxidation reactor with a tangential inlet were simulated and characterized. The flow distribution with five rectifying rings of different structure was simulated and analyzed. The results showed that the rectifying ring improved the distribution uniformity of the pressure and outlet velocity. Compared to the original case without a rectifying ring, the non-uniformity of the pressure and outlet velocity could be reduced by up to91% and 69% respectively. The rectifying ring #5, which can be installed and adjusted easily, is more effective in realizing even distribution. In addition, installation of the rectifying ring effectively reduced the circulating flow in an annular channel as well as the total energy loss.

关 键 词：Oxidation reactorChloride processRectifying ringComputational fluid dynamicsDimensionless pressure 

分 类 号：TQ621.12[化学工程—精细化工] O53[理学—等离子体物理]