摘要
为了探索结构简单、溶解效率高的臭氧水制备方式以及臭氧水喷施过程中的损耗规律,研究4种制备方式和3种溶液pH值对臭氧水浓度和稳定性的影响以及不同喷雾粒径、水温、pH值对臭氧水喷雾特性的影响。结果表明：4种气液混合方式的溶解效率由高到低为：微纳米气泡〉气液混合泵〉砂芯曝气头〉文丘里,曝气5min后臭氧浓度分别达到8.26,5.54,3.84,0.26mg·L-1,除文丘里外,其余3种制备方式制得的臭氧水稳定性无明显差异;调节pH值是一种简单有效的提高臭氧水稳定性的方法,pH=3时,半衰期长达1h;臭氧水的喷雾特性受到喷头、喷雾粒径、初始臭氧水浓度、水温、pH值、外界温湿度等多因素的影响,同一喷头,喷雾粒径越大,臭氧损耗越小。在本试验条件下,臭氧剩余率多集中在20%~35%之间。
Recently, the use of ozone water is rapidly expanding in agricultural production. It＇s important to explore simply structured ozone water generation system with high dissolution efficiency and to detect the spray characteristics of ozone water. This present research investigated the impact of four generation systems, three pH levels on ozone dissolution and decomposition properties, and effect of spray droplet size, temperature and pH on the dissolved ozone concentration of spray droplets. The results indicated that among four kinds of generation systems, dissolution efficiency of micro-nano bubbles system was the highest followed by gas-liquid mixing pump, and then sand aerator, Veuturi was the lowest. After aeration of 5 min, dissolved ozone coneentration of four generation systems reached to 8.26, 5.54, 3.84, 0.26 mg.L ^-1 respectively. There was no significant differenc, e in stability of generated ozone water between three systems beside Venturi. Regulating pH of solution is a simple and efficient way to improve the stability of ozone water. Half life of ozone water was extended to lh, when pH of water was reduced to 3.0. The spray characteristics of ozone water were related to various factors, including nozzle structure, spray droplet size, initial ozone concentration, water temperature, pH, room temperature and humidity and other external factors. Using the same nozzle, the remaining rate of ozone concentration increased with decreasing droplet size. Under the experimental conditions, the remaining rate of ozone concentration as from 20% to 35%.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2013年第5期678-682,共5页
Journal of Shenyang Agricultural University
基金
"十二五"国家"863"计划项目(2013AA103004)
"十二五"国家科技支撑计划项目(2011BAD12B01-A)
关键词
臭氧
臭氧水浓度
溶解
衰减
喷雾粒径
ozone
ozone water concentration
dissolution
decomposition
spray droplet
