电袋复合除尘器的臭氧产生和分布研究

发布时间：2018-05-15 01:26

本文选题：臭氧 + 电袋除尘器　；参考：《广西大学》2015年硕士论文

【摘要】：目前环境问题已日益凸显,污染也日益加剧,灰霾天气及PM2.5污染己越来越引起人们的广泛关注。而调查产生灰霾天气的追因,电厂燃煤锅炉的排放现在已经成为我国大气污染物的主要来源。论文通过自主研发和搭建成功了电袋复合式实验系统,由五个部分组成,分别包括粉尘发生部分、电除尘部分、电源控制部分、分析采样部分和恒流量控制部分,用来模拟经过SCR脱硝后的静电除尘单元。分析采样部分主要由傅里叶红外烟气分析仪dx4000、thermo 49i臭氧仪组成。电袋复合式实验系统的预荷电区和电场区采用直流高压电源,实验系统地研究二次电压、气体流速等因素对臭氧浓度的影响规律。结果表明,模拟电袋复合除尘器电场区内臭氧浓度,最高不超过1 ppm,预荷电产生臭氧浓度为1.4-1.5 ppm。远离高压电晕极时,臭氧浓度分布在横向和纵向衰减趋势明显,横向衰减比为10.8%,纵向衰减比为36.6%。电场中臭氧浓度随着电压升高而增加,随着风速的升高而减小。放电特性芒刺电极要好于鱼骨电极。电极数目增多,臭氧浓度随之增加。电极间距由宽向窄运动时,电流会增强,臭氧浓度升高。板间距由窄向宽运动时,臭氧浓度降低。在低比电阻下,低浓度下,粉尘对臭氧浓度影响很小。且在一年的使用过程中,高压电场产生的臭氧对聚苯硫醚滤料使用无影响。开展电袋复合除尘器的臭氧产生和分布的研究,有着广阔的应用前景和重要的科学价值。
[Abstract]:At present, environmental problems have become increasingly prominent, pollution is also increasing, haze weather and PM2.5 pollution has attracted more and more attention. In order to investigate the causes of haze, the emission of coal-fired boilers in power plants has become the main source of air pollutants in China. The paper has successfully developed and built the electric bag compound experimental system, which consists of five parts, including dust generation part, electric dust collection part, power control part, analysis sampling part and constant flow control part. Used to simulate electrostatic dusting unit after SCR denitrification. The sampling part is mainly composed of Fourier infrared smoke analyzer dx4000 thermo 49i ozone meter. DC high voltage power supply is used in the precharged and electric field area of the electric bag compound experimental system. The influence of secondary voltage and gas velocity on ozone concentration is systematically studied. The results show that the ozone concentration in the electric field of the simulated bag composite precipitator is not more than 1 ppm, and the ozone concentration produced by precharge is 1.4-1.5 ppm. When the halo pole is far away from the high voltage halo pole, the distribution of ozone concentration is obvious in the transverse and longitudinal direction, the transverse attenuation ratio is 10.8 and the longitudinal attenuation ratio is 36.6. The ozone concentration in the electric field increases with the increase of voltage and decreases with the increase of wind speed. The discharge characteristics of burr electrode are better than that of fishbone electrode. As the number of electrodes increases, the ozone concentration increases. When the electrode spacing moves from wide to narrow, the current will increase and the ozone concentration will increase. The ozone concentration decreases when the plate spacing moves from narrow to wide. At low specific resistance and low concentration, dust has little effect on ozone concentration. The ozone produced by high voltage electric field has no effect on the use of polyphenylene sulfide filter media. The research on ozone generation and distribution of ESP has broad application prospect and important scientific value.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X773

【引证文献】