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Development of very high efficiency ozonizer using thin film dielectric

使用薄膜电介质开发非常高效的臭氧发生器

基本信息

批准号：
12450115
负责人：
FUJITA Itsurou
金额：
$ 3.52万
依托单位：
Sasebo National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450115/
关键词：
Ozonizer Dielectric Waste water treatment Environment purification Cluster Droplet

项目摘要

Ozone is one of the strongest oxidizing and bleaching agents without residues that could be harmful to the environment. For this reason, ozone has been used for a variety of applications such as bleaching, deodorization, and disinfection of water and atmospheric air. Due to those properties a great number of papers were devoted to ozone generation in order to improve efficient. It is well known that there are four important parameters to improve ozone generation rate; discharge gap length, gas temperature, discharge uniformity and surface of the dielectric barrier. We investigate the ozone generation rate as the parameters of quality of dielectric barrier include the surface morphology of the dielectric barrier. Experimental results suggest that ozone density is increased with increasing discharge voltage and decreasing dielectric thickness. The maximum ozone generation efficiency of our system is 340 g/kWh. Ozone generation rate using several thin film dielectric on the Pyrex glass or … More Al_2O_3 as dielectric barrier were higher than that using normal Pyrex glass or Al_2O_3. The ozone generation rate was depend on the dielectric ratio of the thin film, and that was 3.5 times higher using BaTiO_3 thin film dielectric.Ozone and ceramic filter treatment for the waste water purification was applied at all places of the sedimentation tank. We installed the ozone treatment system at the entrance of the primary sedimentation tank, the exits of the primary sedimentation tank and the final sedimentation tank in this experiment. Ozone density for the waste water treatment was 8.3 g/m3. Ozone was dissolved in the waste water of 500 ml. Experimental results show that turbidity and color unit decrease with ozone treatment time at any place of the sedimentation tank. They decrease drastically to 20 min, and after that they are saturated. Chemical oxygen demand (COD) also decreases from 66.9 g/l to 51.3 g/l after 20 min ozone treatment at the entrance of the primary sedimentation tank. Number of colon bacillus decreases to zero after 3 min ozone treatment. These experimental results suggest that ozone treatment is effective for waste water purification at any sedimentation tank. In addition, ozone treatment with ceramic filter is effective to decrease turbidity and color unit drastically. Less

臭氧是最强的氧化剂和漂白剂之一，没有可能对环境有害的残留物。由于这个原因，臭氧已被用于各种应用，如漂白、除臭和水和大气空气的消毒。由于这些特性，大量的论文致力于臭氧的产生，以提高效率。众所周知，提高臭氧生成率有四个重要参数；放电间隙长度、气体温度、放电均匀性和介质阻挡面。由于介质阻挡层的表面形貌是表征介质阻挡层质量的参数，因此我们对臭氧生成率进行了研究。实验结果表明，臭氧密度随放电电压的增大和介质厚度的减小而增大。系统最大臭氧生成效率为340克/千瓦时。在热玻璃上使用几种薄膜介质或使用更多的Al_2O_3作为介质屏障，臭氧生成率高于普通热玻璃或Al_2O_3。臭氧的生成速率与薄膜的介电比有关，使用BaTiO_3薄膜的介电比可提高3.5倍。沉淀池各部位均采用臭氧和陶瓷过滤器处理废水净化。本实验在一次沉淀池入口、一次沉淀池出口和终沉淀池出口分别安装了臭氧处理系统。废水处理臭氧浓度为8.3 g/m3。在500 ml的废水中溶解臭氧，实验结果表明，在沉淀池的任何位置，浊度和色单位随臭氧处理时间的延长而降低。它们急剧减少到20分钟，之后它们就饱和了。初级沉淀池入口臭氧处理20 min后，化学需氧量（COD）由66.9 g/l降至51.3 g/l。臭氧处理3 min后，大肠杆菌数量降至零。实验结果表明，臭氧处理对任何沉淀池的废水净化都是有效的。此外，采用陶瓷过滤器对臭氧进行处理，可大幅度降低浊度和色单位。少