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| 1 | A CFD model for gas uniform distribution in turbulent flow for the production of titanium pigment in chloride process显示文摘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. | Yadong Li Gang Xie Ting Lei Chongjun Bao Lin Tian Yanqing Hou | 2016 | Chinese Journal of Chemical Engineering2016，24，6： | 4 |
| 2 | 氯化法TiCl_(4)氧化制备TiO_(2)中气体混合研究显示文摘氯化法钛白生产中的核心技术是TiCl_(4)气相氧化反应过程。氧化反应器是氯化法钛白生产中的核心设备,氧化反应器中射流环的开孔结构直接影响TiCl_(4)与O_(2)的混合效果。采用计算流体力学(CFD)的方法,研究了5种不同射流环结构对流体混合效果的影响,获得了TiCl_(4)气体在反应管内的径向浓度分布情况,以及TiCl_(4)与O_(2)混合的不均匀度。结果表明,射流环开孔结构对物料的混合有显著的影响,组合开孔射流环的物料混合效果优于均匀开孔射流环,更有利于反应物流体TiCl_(4)和O_(2)实现快速均匀地混合。 | 李亚东 孙应 程涌 张金梁 黄卉 刘振楠 | 2021 | 昆明冶金高等专科学校学报2021，37，5： | 1 |
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