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

doi:10.1016/j.cjche.2016.04.051

Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (6): 749-756.DOI: 10.1016/j.cjche.2016.04.051

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

Yadong Li^1,2, Gang Xie^2,3,4, Ting Lei⁵, Chongjun Bao^3,4, Lin Tian³, Yanqing Hou¹

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, Kunming 650033, China

Received:2015-11-14 Revised:2016-01-22 Online:2016-07-12 Published:2016-06-28
Contact: Yanqing Hou
Supported by:
Supported by the National Natural Science Foundation of China (21566015, 51404123), the Applied Basic Research Projects of Yunnan (2013FC002, 2013FC003, 2015FB126) and the Provincial Personnel Training Funds of Yunnan Province of China (KKSY201352109, KKPT201563013).

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

Yadong Li^1,2, Gang Xie^2,3,4, Ting Lei⁵, Chongjun Bao^3,4, Lin Tian³, Yanqing Hou¹

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, Kunming 650033, China

通讯作者: Yanqing Hou
基金资助:
Supported by the National Natural Science Foundation of China (21566015, 51404123), the Applied Basic Research Projects of Yunnan (2013FC002, 2013FC003, 2015FB126) and the Provincial Personnel Training Funds of Yunnan Province of China (KKSY201352109, KKPT201563013).

Abstract

Abstract: The fluid dynamic behavior of feeding gas (TiCl₄) in an annular channel affects the combination of O₂ and TiCl₄ 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 TiCl₄ 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 to 91% and 69% respectively. The rectifying ring #5, which can be installed and adjusted easily, ismore 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.

Key words: Oxidation reactor, Chloride process, Rectifying ring, Computational fluid dynamics, Dimensionless pressure

摘要： The fluid dynamic behavior of feeding gas (TiCl₄) in an annular channel affects the combination of O₂ and TiCl₄ 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 TiCl₄ 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 to 91% and 69% respectively. The rectifying ring #5, which can be installed and adjusted easily, ismore 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 reactor, Chloride process, Rectifying ring, Computational fluid dynamics, Dimensionless pressure

Yadong Li, Gang Xie, Ting Lei, Chongjun Bao, Lin Tian, Yanqing Hou. A CFD model for gas uniform distribution in turbulent flow for the production of titanium pigment in chloride process[J]. Chin.J.Chem.Eng., 2016, 24(6): 749-756.

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

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

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