沿面放电活化空气用于亚硫酸铵氧化  

Oxidation of ammonium sulfite with activated air by surface discharge plasma

作　　者：韩长民 张轶 商克峰[2] 吴森[2] 李杰[2] 吴彦[2] 

机构地区：[1]武汉凯迪电力环保有限公司,武汉430223 [2]大连理工大学静电与特种电源研究所,大连116024

出　　处：《环境工程学报》2015年第8期3965-3969,共5页Chinese Journal of Environmental Engineering

摘　　要：在主流湿法烟气脱硫工艺中,采用强制氧化法对亚硫酸盐产物进行氧化,该方法存在亚盐氧化速率低、耗能高、设备投资大等问题。本研究采用沿面放电等离子体将空气预活化为富含活性氧的氧化气体,替代空气以提高亚硫酸盐的氧化效率。以亚硫酸铵浆液为对象,考察了沿面放电等离子体装置中空气流速、放电电压等活性物质发生因素,以及浆液pH值、浆液温度和硫酸铵含量等浆液条件对亚硫酸铵氧化的影响,发现亚硫酸盐氧化率随空气流速增大、放电电压升高而升高,pH值、浆液温度对亚硫酸铵氧化的影响不大,浆液中硫酸铵的存在不影响活性氧注入提高空气强制氧化亚硫酸铵效果的性能。同空气强制氧化相比,采用沿面放电预活化的空气氧化,可有效缩短亚硫酸铵的氧化时间。沿面放电活性氧注入是一种快速高效的亚硫酸盐氧化方法,具有较高的工业应用价值。The forced oxidation method is commonly used in wet FGD processes for oxidizing the sulfite product, but it holds some drawbacks including low oxidation rate, high energy cost, and high device invest- ment, etc. In this study, surface discharge plasma was used to activate air to produce reactive oxygen species （ROS） , and it replaced air as the oxidant for improving the oxidation efficiency of sulfite. The influencing fac- tors of sulfite oxidation including the air flow rate in surface discharge reactor, discharge voltage, solution pH value, and solution temperature and the content of ammonium sulfate in solution were examined. It is found that the oxidation efficiency of ammonium sulfite increased with the air flow rate and the discharge voltage, while the pH and the solution temperature presented less effect on the oxidation efficiency of ammonium sulfite, and the content of ammonium sulfate had little effect on the enhanced performance of sulfite oxidation by ROS injection. Comparing with air forced oxidation, ROS injection can effectively reduce the oxidation time, and it has a big ap-plication potential in wet FGD.

关 键 词：沿面放电等离子体 活性氧注入 亚硫酸盐 氧化 影响因素 

分 类 号：X773[环境科学与工程—环境工程]