摘要
利用难溶气体臭氧来制备高浓度臭氧水(≥100 mg/L)一直属于国际技术难题。采用经优化改装后的商业化臭氧气体发生器,利用根据双膜溶气理论和静压平衡原理设计的溶气装置,组装了高浓度臭氧水制备系统。臭氧水浓度随着臭氧发生器的功率增大而增加,水温降低可以提高臭氧的溶解度和臭氧水浓度;臭氧发生器功率不超过900 W时,有效溶气效率能达到90%以上;随着气液比升高,臭氧溶气效率先上升后下降,最佳气液比为1.5左右。在采用自来水进行试验的条件下,该制备系统在压力0.2 MPa、水流量在60 L/h、气液比为1.5及满功率1000 W运行,当水温为8.9℃时臭氧水浓度超过200 mg/L,并呈现蓝色;当水温为22.4℃时,臭氧水浓度为149.4 mg/L。本研究工作取得了高浓度臭氧水制备技术领域的突破。
The preparation of high concentration ozonated water(≥100 mg/L)using insoluble gas ozone has been an international technical challenge.A high concentration ozonated water preparation system was assembled using a commercial ozone gas generator optimized and modified,and a dissolved gas device designed according to the double membrane dissolved gas theory and the principle of hydrostatic equilibrium.The ozonated water concentration increases with the increase of power,and the decrease of water temperature can improve the ozone solubility and ozonated water concentration.The effective gas dissolution efficiency can reach more than 90%when the power of ozone generator did not exceed 900 W.With the increase of gas-liquid ratio,the ozone gas dissolution efficiency raised and then decreased,and the best gas-liquid ratio was about 1.5.Under the test conditions of tap water,the pressure of 0.2 MPa,the water flow rate of 60 L/h,the gas-to-liquid ratio of 1.5 and the full power of 1000 W,the ozonated water concentration exceeded 200 mg/L and appeared blue at the water temperature of 8.9℃.Moreover the ozonated water concentration was 149.4 mg/L at the water temperature of 22.4℃.This work is a breakthrough in the field of high concentration ozonated water preparation technology.
作者
姚佳伟
杨庆峰
刘阳桥
YAO Jia-wei;YANG Qing-feng;LIU Yang-qiao(Green Chemical Engineering Technology Research Center,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China)
出处
《应用化工》
CAS
CSCD
北大核心
2022年第11期3119-3122,共4页
Applied Chemical Industry
基金
国家自然科学基金(51878647)。
关键词
高浓度臭氧水
臭氧
清洗
消毒
high concentration ozonated water
ozone
cleaning
disinfection
