基于CFD技术的臭氧给水处理工艺研究进展

Review on the development of ozonic water supply treatment research based on CFD technology

回顾了目前应用CFD技术对臭氧给水处理工艺的研究情况。从前人的研究成果来看,大多数的研究以臭氧接触池为对象,研究内容主要针对池内出现的回流、死水区问题而进行池型结构的优化,结果发现优化水力结构可提高池内的气液接触效率,并使流态更接近理想推流。部分研究涉及池内臭氧衰减及有机物降解反应的探索,多数结论认为臭氧衰减符合一级反应动力学,有机物降解则为二级反应,但反应机理须视具体情况而定。基于对现在的研究进展及CFD应用前景分析,未来的研究方向将是对于池内有机物降解及相关化学反应机理的进一步研究,以及建立更为全面的处理工艺运行评价指标。

The current application of CFD technology to the ozonic water supply treatment research was reviewed. On the basis of previous data, ozone contaetor was selected as the main research object. The main content of the study is to optimize the pond structure to solve the problem of back flow and dead zones, the optimization of hydraulic structure can improve the efficiency of gas -liquid contact in the con- tactor, and the flow is more close to the ideal plug flow. The study of ozone decay and organic matter degradation in the contactor was partly involved. The major conclusion is that the ozone decay follows the first - order kinetics, while the degradation of organic matter is the second order kinetics. However, the reaction mechanism should depend on the specific circumstances. Based on the analysis of the present re- search findings and application prospect of CFD, future research direction will be the further studies on organic matter degradation and related chemical reaction mechanism in the contactor, and the establish- ment of a more comprehensive evaluation index of ozonic treatment process.