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Development of a new screen type ozonizer with rod-to-rod electrodes and it's application to air pollution treatment

新型棒对棒电极丝网式臭氧发生器的研制及其在空气污染治理中的应用

基本信息

批准号：
12650287
负责人：
NOMOTO Yukiharu
金额：
$ 2.3万
依托单位：
Oita University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650287/
关键词：
ozone ozonizer silent discharge ozone yield ozone generation efficiency rod-to -rod electrode

项目摘要

The silent discharge is mainly used for ozone generation in an ozonizer. Most practical ozonizer has a coaxial cylindrical electrode system with a gap spacing of 1-2 mm and 1-2 m length. In this electrode geometry, ozone created by a silent discharge is destroyed by next discharge when gas passes the narrow and long discharge gap field. In this study, instead of conventional coaxial cylindrical electrode system, a rod-to-rod electrode system is used. The proposed ozonizer consists of nine units of the electrode system which are mounted in parallel in a box type reactor. Therefore, in this ozonizer, a screen type discharge can be produced. The main results are summarized as follows.(1) In the case of the ozonizer with one unit of rod-to-rod electrode system, the optimum gap spacing was 0.7-1.0 mm. Filamentary uniform discharge can be obtained along the gap.(2) Maximum ozone generation efficiency of 123 g/kWh (discharge power 0.7 W, ozone concentration : 340 ppm) for dry air and 375 g/kWh (discharge power 0.5 W, ozone concentration : 745 ppm) for oxygen was obtained in the ozonizer with three electrode screens at the gas flow rate of 2 L/min.(3) Typical ozone generation characteristics of ozone concentration : 2500 ppm and ozone generation efficiency : 100 g/kWh for air and 5500 ppm and 200 g/kWh for oxygen are obtained in three screens ozonizer.(4) Maximum ozone concentration of 3400 ppm (amount of ozone generation : 860 mg/h, ozone generation efficiency : 82 g/kWh) for air and 6800 ppm (amount of ozone generation : 1740 mg/h, ozone generation efficiency : 173 g/kWh) for oxygen are obtained.

无声放电主要用于臭氧发生器中的臭氧生成。最实用的臭氧发生器有一个同轴圆柱形电极系统的间距为1-2毫米和1-2米的长度。在这种电极几何结构中，当气体通过狭长的放电间隙场时，无声放电产生的臭氧被下一次放电破坏。在本研究中，采用棒对棒电极系统代替传统的同轴圆柱形电极系统。所提出的臭氧发生器由9个电极系统单元组成，它们并联安装在一个箱式反应器中。因此，在这种臭氧发生器中，可以产生筛网式排出物。主要研究结果总结如下：(1)臭氧发生器采用1单元棒对棒电极系统时，最佳间隙间距为0.7 ~ 1.0 mm。沿间隙可获得丝状均匀放电。(2)在空气流量为2 L/min的情况下，采用三电极筛网的臭氧发生器，干燥空气的最大臭氧生成效率为123 g/kWh（放电功率0.7 W，臭氧浓度340 ppm），氧气的最大臭氧生成效率为375 g/kWh（放电功率0.5 W，臭氧浓度745 ppm）。(3)三屏臭氧发生器的典型臭氧生成特性为臭氧浓度为2500 ppm，臭氧生成效率为空气100 g/kWh，氧气5500 ppm和200 g/kWh。(4)空气最大臭氧浓度为3400 ppm（臭氧产生量为860 mg/h，臭氧生成效率为82 g/kWh），氧气最大臭氧浓度为6800 ppm（臭氧产生量为1740 mg/h，臭氧生成效率为173 g/kWh）。