摘要
为了解决湿式氨法烟气脱硫生成不稳定亚硫酸铵((NH4)2SO3)副产物的问题,设计了以不锈钢弹簧和溶液分别作为高压和低压电极的沿面放电系统,对液相(NH4)2SO3的氧化进行了研究。空气从反应器上方进入后经放电区域形成活性物质,再由底部的曝气头鼓入溶液并与(NH4)2SO3发生反应。比较了沿面放电处理与传统曝气处理的氧化效率,考察了放电电压、载气气量和初始浓度等因素对(NH4)2SO3氧化的影响。结果表明,沿面放电对(NH4)2SO3有显著的氧化效果;优化条件下的(NH4)2SO3氧化率接近100%;溶液中(NH4)2SO4与(NH4)2SO3的浓度比小于1时有利于(NH4)2SO3的氧化。
Ammonium sulfite was the unstable byproduct of ammonia absorption methods for flue gas desulfuration.In order to deal with this problem,oxidation of ammonium sulfite using a surface discharge system was investigated.The surface discharge reactor used a stainless steel spring as high voltage electrode and aqueous solutions as ground electrode.The air flowed into reactor from the top and it was converted to active species by discharge.Active species was bubbled into the solutions by a bottom aerator and reacted with ammonium sulfite.Surface discharge treatment and traditional air aeration were compared in terms of oxidation efficiency.The factors including applied voltage,gas flow rate and initial concentration were discussed.The results show that the oxidation efficiency of ammonium sulfite by discharge treatment has a significant increase compared with traditional air aeration.The oxidation efficiency of ammonium sulfite has proved to be nearly 100% under optimum conditions.The oxidation of ammonium sulfite can be accelerated when the ratio of ammonium sulfate to ammonium sulfite is less than 1∶1.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第9期3489-3493,共5页
Chinese Journal of Environmental Engineering
基金
国家“863”高技术研究发展计划项目(2009AA064101-4)
关键词
沿面放电
亚硫酸铵氧化
臭氧
烟气脱硫
surface discharge
ammonium sulfite oxidation
ozone
flue gas desulfurization
