臭氧流化床反应器的模拟与优化

Simulation and optimization of ozone fluidized bed reactor

臭氧流化床反应器是一种结构简单、制造成本低、维护操作方便和运行能耗低的多相流反应器.为找到臭氧流化床反应器在水处理中能更好发挥其优势的参数,首先基于物理模型试验和计算流体动力学搭建了气流内循环式反应器的研究模型,并将试验数据与数值模拟结果进行对比,结果发现数值模拟很好地给出了臭氧流化床的内部流体流态特征.再基于数值模拟,对该臭氧流化床内部流场进行数值模拟分析,并进一步研究高径比、底部斜板角度、臭氧输入速度等参数的影响,结果发现在高径比3、底部斜板角度为45°、臭氧输入速度为0.05 m/s时,臭氧流化床模型最能体现出其优秀的水处理能力和高效的经济效益,使污水处理技术更加高效和环保.通过创建模型并进行数值模拟分析这种方法能够较准确地找到使臭氧流化床反应器发挥出其较好的处理能力的参数.

The ozone fluidized bed reactor is a multiphase reactor with a series of advantages such as simple structure,low manufacturing cost,easy maintenance and operation,and low energy consumption.In order to find the parameters that can make the ozone fluidized bed better play its advantages in water treatment,a research model of the gas flow circulating reactor based on physical model experiments and computational fluid dynamics methods was built,and the experimental data were compared with the numerical simulation results.Results indicated that the numerical simulation gave a good indication of the fluid flow characteristics inside the ozone fluidized bed.Subsequently,based on numerical simulation,the internal flow field of the ozone fluidized bed was analyzed,and the effects of parameters such as height to diameter ratio,bottom inclined plate angle,and ozone input velocity were further studied.The study found that at a height to diameter ratio of 3,a bottom inclined plate angle of 45 degrees,and an ozone input velocity of 0.05 m/s,the ozone fluidized bed model can best demonstrate its excellent water treatment capacity and high economic efficiency,making sewage treatment technology more efficient and environmentally friendly.Therefore,this method could accurately find the parameters that enabled the ozone fluidized bed reactor to exert its better treatment capacity by creating a model and performing numerical simulation analysis.