陶瓷膜臭氧曝氣強(qiáng)化傳質(zhì)工藝優(yōu)化研究

1. 文章信息

標(biāo)題：Study on optimization of mass transfer enhanced by ceramic membrane ozone aeratior

中文標(biāo)題：陶瓷膜臭氧曝氣強(qiáng)化傳質(zhì)工藝優(yōu)化研究

2. 文章鏈接

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

3. 期刊信息

期刊名：工業(yè)水處理

4. 作者信息：馬云飛,張靖儀,王建兵,張 先 

南開大學(xué)環(huán)境科學(xué)與工程學(xué)院,天津300350;

北京航空航天大學(xué)前沿科學(xué)技術(shù)創(chuàng)新研究院,北京100191;

中國(guó)礦業(yè)大學(xué)(北京)化學(xué)與環(huán)境工程學(xué)院,北京 100083;

內(nèi)蒙古工業(yè)大學(xué),內(nèi)蒙古呼和浩特 010051;

5.文中所用產(chǎn)品型號(hào)：臭氧發(fā)生器3S-T10、臭氧檢測(cè)儀3S-J5000、臭氧尾氣破壞器

摘要:臭氧氧化技術(shù)存在氣液傳質(zhì)效率低、臭氧利用率不高等問題,改進(jìn)臭氧的曝氣條件是強(qiáng)化臭氧傳質(zhì)效率的重要方法。進(jìn)行了陶瓷膜臭氧曝氣的試驗(yàn)研究,表征了陶瓷膜的微孔性與形態(tài)結(jié)構(gòu),探究了不同操作條件對(duì)臭氧傳質(zhì)效率的影響。結(jié)果表明:臭氧傳質(zhì)系數(shù)隨進(jìn)氣流量、氣相臭氧質(zhì)量濃度的增加先增大后減小,很佳條件:進(jìn)氣流量為0.4L/min,氣相臭氧質(zhì)量濃度為28mgL。陶瓷膜表面疏水改性可以提升臭氧傳質(zhì)效率,臭氧溶解度及傳質(zhì)效率隨膜孔徑的減小而增大,隨著曝氣壓力從0.1 MPa提高到0.5 MPa,臭氧傳質(zhì)效率先增大后減小,很佳的曝氣壓力約為0.3MPa,并基于楊氏方程分析了陶瓷膜加壓曝氣強(qiáng)化臭氧傳質(zhì)的機(jī)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.