DEVELOPMENT OF COMPACT EXHUST GAS TREATMENT EQUIPMENT FOR DIESEL ENGINE USING DIELECTRIC BARRIER DISCHARGE

紧凑型介质阻挡放电柴油机废气处理装置的研制

基本信息

批准号：
09555084
负责人：
FUJIWARA Tamiya
金额：
$ 5.63万
依托单位：
IWATE UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555084/
关键词：
FLUE GAS TREATMENT Nox REMOVAL BARRIER DISCHARGE SILENT DISCHARGE NON-EQUILIBRIUM PLASMA LOW TEMPARETURE PLASMA PLASMA CHEMISTRY AIR POLLUTANT CONTROL NOx処理非平衡プラズマ

项目摘要

The purpose of this project is to realize a compact system of NOx removal from exhaust gas of diesel engine generator with high efficiency. The project was performed in the following three steps. (1) The first step is to grasp the characteristics of a barrier discharge plasma reactor with a multipoint-to-plane geometry and clarify physical and chemical reactions in the plasma. (2) The second step is to develop a power supply for the plasma reactor. (3) The third is the outlook for practical application of the reactor. In the step(1), we investigated mainly the characteristics of the dielectric barrier discharge between the multipoint and plane electrodes, and an effect of them on the NOx removal. The results are as follows.In regard to the polarity of the streamer, it was clarified that the positive and negative streamers both are generated according to the polarity of applied voltage in the case of the multipoint-to-plane barrier discharge while the positive streamer only is generated … More in the case of the parallel planes barrier discharge. And the current of the micro-discharge is larger between the parallel plane electrodes than the multipoint-to-plane electrodes. In comparison of the gas treatment performance, the NOx removal of the multipoint-to-plane discharge was larger than that of the parallel planes discharge. Concerning the step (2), we did a trial production of a pulse modulator which is composed the IGBT and a pulse transformer. The specification is AC100V in rated primary voltage, 【minus-plus】10kV in secondary output voltage and 2500pps in reputation rate of pulses. With respect to the step (3), an experiment of actual operation was carried out using a diesel engine generator with the rating of 20kVA. An exhaust gas from the generator was flowed into the plasma reactor through a ceramic catalyst and a particle filter. The reactor was made only of a metal, a ceramic and a glass with heat-resistance. A double-walled structure was designed so that it prevents the wall surface from condensing due to wall temperature drop. By this structure, it was confirmed that NOx could be reduced in long time operation of about 12 hours. The filter is maintained by exposing to atmosphere of high temperature and burning out the deposits in about one month. The NOx removal is 35ppm and is corresponding to 10% reduction for the concentration (about 3 50ppm) in the full load. Gas flow rate and input energy are 1.2's mィイD13ィエD1/min. and 9 J/L, respectively. Less

这是在以下三个步骤中实现高效的排气发动机的紧凑型系统血浆反应器。流媒体澄清的是，在跨学科的情况下，负面的电压都会产生为施加的电压的极性。在多点到平面电极之间，放电和微型电流的电流较大（2）在经过的原发电压中，二次输出电压为10kV，相对于20KVA的台阶（3）等级。通过陶瓷催化剂和颗粒滤镜，由金属制成，陶瓷和耐热的玻璃。长时间的工作可以减少12个小时，通过暴露于高温大气并在大约一个月内将沉积物降低。 3 50ppm）在ESS中