高浓度羟基自由基水对室内生物气溶胶消杀的实验研究  

Experimental investigation of hydroxyl radicals in high concentration for killing biological aerosol pathogens in indoor air

作　　者：王帅 况欣怡 赵紫琴 廖宏国 崔政伟 WANG Shuai;KUANG Xinyi;ZHAO Ziqin;LIAO Hongguo;CUI Zhengwei(Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,School of Mechanical Engineering,Jiangnan University,Jiangsu,Wuxi 214122,China)

机构地区：[1]江苏省食品先进制造装备技术重点实验室,江南大学机械工程学院,江苏无锡214122

出　　处：《化学工业与工程》2024年第4期109-116,共8页Chemical Industry and Engineering

摘　　要：新冠疫情的施虐让空气的绿色高效消毒杀菌成为急需解决的问题。以空气中生物气溶胶为研究对象,创建螺旋切割器辅助制备高浓度臭氧水循环装置,结合逆流式填料过滤器进行空气杀菌。探究不同pH值和温度对臭氧水浓度和羟基自由基浓度的影响。结果表明:在pH=7,25℃的条件下,平衡臭氧水浓度可达11.65 m·L^(-1),羟基自由基浓度达到95.84μmol·L^(-1)。并进一步探究不同pH值、温度、喷淋流量和风速对杀菌率的影响。结果表明:在pH=7、25℃、喷淋流量500 L·h^(-1)和风速2.5 m·s^(-1)的条件下,杀菌时间20、40和60 min的杀菌率分别为77.3%、87.6%和96.7%。因此,高浓度臭氧水循环装置结合填料过滤器对空气中气溶胶微生物具有良好的杀菌效果。Environmental safety issues such as air disinfection and sterilization caused by COVID-19 have become hot spots that need to be solved urgently.In this study,a spiral cutter was used to nanoscale bubble and prepare a high-concentration ozone water in a circulation device.Then combined it with a counterflow packing filter,the novel air sterilization rig was set up for killing biological aerosol pathogens in air.The effects of different pH values and temperatures on ozone water concentration and hydroxyl rad-ical concentration were then investigated.The experimental results show that the concentration of ozone water after equilibrium can reach 11.65 m·L^(-1) and the concentration of hydroxyl radical reaches 95.84μmol·L^(-1) under the condition of pH=7 and temperature of 25℃.The effects of different pH,temperature,spray flow and wind speed on the sterilization rate were further explored.The experimental results show that the sterilization rates of 20,40 and 60 min are 77.3%,87.6%and 96.7%,respective-ly under the conditions of pH=7,temperature 25℃,spray flow rate 500 L·h^(-1) and wind speed of 2.5 m·s^(-1).Therefore,the current high-concentration ozone water circulation device combined with the packing filter has a good sterilization effect for air sterilization.

关 键 词：臭氧 羟基自由基 填料过滤器 生物气溶胶 杀菌率 

分 类 号：V419.62[航空宇航科学与技术—航空宇航推进理论与工程] Q938.1[生物学—微生物学]