环形流化床光催化氧化反应器流场数值模拟

发布时间：2018-05-03 03:34

本文选题：光催化氧化 + 悬浮式反应器　；参考：《环境工程学报》2016年12期

【摘要】：采取计算流体力学(CFD)方法对环形流化床光催化氧化反应器内部流场进行了模拟计算,重点考察了重力、废水流速、反应器放置方式等对微米级TiO2催化剂浓度分布、颗粒温度的影响。结果表明,对于水平放置的反应器,催化剂浓度分布受重力影响比较显著,且增大反应器入口处废水流速,催化剂颗粒浓度径向分布会趋于均匀;增大反应器入口处废水流速,可以提高边界层中催化剂颗粒温度,促进催化剂颗粒向流体主体做径向运动。与水平放置相比较,反应器竖直放置使流场中催化剂浓度径向分布更均匀,有利于提高光催化氧化反应的速率和效率。
[Abstract]:The flow field in the photocatalytic oxidation reactor of a circular fluidized bed was simulated by computational fluid dynamics (CFD) method. The concentration distribution of micron TiO2 catalyst was investigated, such as gravity, wastewater flow rate and reactor placement method. The effect of particle temperature. The results show that the distribution of catalyst concentration is affected by gravity significantly for the reactor with horizontal placement, and the radial distribution of catalyst particle concentration tends to be uniform when the flow rate of wastewater increases at the inlet of reactor, and the flow rate of wastewater at the inlet of reactor increases. It can increase the temperature of catalyst particles in the boundary layer and promote the radial movement of catalyst particles to the main body of the fluid. Compared with horizontal placement, the vertical placement of the reactor makes the radial distribution of catalyst concentration more uniform in the flow field, which is beneficial to improve the rate and efficiency of photocatalytic oxidation reaction.
【作者单位】：中国轻工业节能节水与废水资源化重点实验室(轻工业环境保护研究所);中国科学院过程工程研究所多相复杂系统国家重点实验室;
【基金】：国家科技部科研院所技术开发研究专项资金项目(2013EG111129) 北京市科学技术研究院海外人才专项资助项目(OTP-2013-015)
【分类号】：X703

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