氯化法钛白氧化反应器气体错流混合

<P>CHENG Yi; LIU Zhel; LUO Peicheng; WEI Fei</P>

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氯化法钛白氧化反应器气体错流混合

更新时间：2025-12-10

- 氯化法钛白氧化反应器气体错流混合
- CIESC Journal Issue 12, (2006)
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- Online First：25 December 2006，
  
  Published：25 December 2006
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CHENG Yi, LIU Zhel, LUO Peicheng, et al. 氯化法钛白氧化反应器气体错流混合[J]. CIESC Journal, 2006, (12).
DOI：

CHENG Yi, LIU Zhel, LUO Peicheng, et al. 氯化法钛白氧化反应器气体错流混合[J]. CIESC Journal, 2006, (12).
DOI：

摘要

氧化反应器是氯化法制取钛白粉的关键设备，混合区的流场设计直接影响反应产品TiO2颗粒的质量（如粒径和粒径分布）.利用无干扰流场测试技术——粒子图像测速仪（PIV）研究了不同气体错流混合区的结构设计对混合区域流场的影响，考察了气流动量比、射流狭缝宽度以及射流角度对混合区流场的影响.结果表明，较大的气流动量比、窄射流狭缝宽度和接近90°的射流能获得更好的混合区速度分布.进一步利用计算流体力学（CFD）手段对相应的流场进行了模拟，与PIV实验结果吻合很好，验证了模型对冷态流动的预测能力.

Abstract

The oxidation reactor plays the key role in the chloride process for producing titanium dioxide (TiO2).The design of the initial mixing zone has direct influence on the quality of TiO2 products (i.e.

particle size and its distribution).A detailed study was carried out on the hydrodynamics in gas cross-flow mixing zone by the non-intrusive measurement technique

particle imaging velocimetry(PIV).The effects of momentum ratio

width of jet aperture and the angle between bulk flow and jet flow were investigated.The results showed that larger momentum ratio

narrower width of the aperture

and 90° angle between wall jet and axial flow promoted a better flow field in the mixing zone.The computational fluid dynamics (CFD) technique was also used to study the above processes in theoretical modeling and numerical simulation.The CFD predictions had very good agreement with the PIV experimental data

which demonstrated the predictability of the proposed model for the cold-model flows.

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