陶瓷膜臭氧曝气强化传质工艺优化研究

陶瓷膜臭氧曝气强化传质工艺优化研究

1. 文章信息

标题：Study on optimization of mass transfer enhanced by ceramic membrane ozone aeratior

中文标题：陶瓷膜臭氧曝气强化传质工艺优化研究

2. 文章链接

DOI:10.19965/i.cnki.iwt.2023-0859

3. 期刊信息

期刊名：工业水处理

4. 作者信息：马云飞,张靖仪,王建兵,张 先 

南开大学环境科学与工程学院,天津300350;

北京航空航天大学前沿科学技术创新研究院,北京100191;

中国矿业大学(北京)化学与环境工程学院,北京 100083;

内蒙古工业大学,内蒙古呼和浩特 010051;

5.文中所用产品型号：臭氧发生器3S-T10、臭氧检测仪3S-J5000、臭氧尾气破坏器

摘要:臭氧氧化技术存在气液传质效率低、臭氧利用率不高等问题,改进臭氧的曝气条件是强化臭氧传质效率的重要方法。进行了陶瓷膜臭氧曝气的试验研究,表征了陶瓷膜的微孔性与形态结构,探究了不同操作条件对臭氧传质效率的影响。结果表明:臭氧传质系数随进气流量、气相臭氧质量浓度的增加先增大后减小,很佳条件:进气流量为0.4L/min,气相臭氧质量浓度为28mgL。陶瓷膜表面疏水改性可以提升臭氧传质效率,臭氧溶解度及传质效率随膜孔径的减小而增大,随着曝气压力从0.1 MPa提高到0.5 MPa,臭氧传质效率先增大后减小,很佳的曝气压力约为0.3MPa,并基于杨氏方程分析了陶瓷膜加压曝气强化臭氧传质的机理。

Abstract: 0zonation technology has problems such as low gas-liquid mass transfer efficiency and low ozone utiliza.tion. The improvement of ozone aeration conditions is an effective approach to enhance ozone mass transfer. In this regard, an experimental study of ozone aeration with ceramic membranes was carried out to characterize the micropo rosity and morphological structure of ceramic membranes, and to investigate efects of different operating conditions on ozone mass transfer. 'The results showed that the ozone mass transfer coefficient firstly increased and then decreased with the inerease of inlet gas flow rate and gas-phase ozone concentration. The optimal conditions were 0.4 L/min and 28 mg/L. The hydrophobic modification of ceramic membrane surface could enhance the ozone mas  transfer efficiency. Ozone solubility and mass transfer efficiency increased with the decrease of membrane pore size With the inerease of aeration pressure from 0.1 MPa to 0.5 MPa, the ozone mass transfer efficiency firstly inereased and then decreased, and the optimal aeration pressure was about 0.3 MPa. The mechanism of ceramic membrane pressurized aeration to strengthen the ozone mass transfer was analyzed based on Young-Laplace equation.