强电离放电制取·OH及其在烟气脱硫中的应用  

SO_2 Oxidation Removal by H_2SO_4 Droplets Using Plasma-generate Hydroxyl Radicals

作　　者：潘巧媛[1] 白敏菂[1] 冷宏 薛晓红[1] 王永伟 

机构地区：[1]大连海事大学环境工程研究所,大连116026 [2]大连博羽环保技术开发公司,大连116026

出　　处：《高电压技术》2009年第9期2202-2206,共5页High Voltage Engineering

摘　　要：为了解决目前气体电离放电脱硫方法存在的问题,采用强电场电离放电方法,以O2、H2O为原料制取高体积分数大产生量的·OH等活性碎片,注入烟气中氧化脱除SO2并生成酸。研究结果表明,在烟气温度65°C、·OH与SO2体积分数比为4时,SO2脱除率达到了83.4%;烟气温度升高致使脱硫率成直线下降,温度每增加10°C脱硫率约下降6%;烟气体积流量从0.6增加到2.4m3/h时,脱硫率变化<1%,脱硫率几乎为一恒定值。·OH注入脱硫技术能有效脱除烟气中SO2,整个过程不需外加吸收剂、催化剂,产物为硫酸,是一种资源化烟气脱硫的绿色新方法。An experimental investigation has been conducted to remove SO2 from flue gas by means of hydroxyl radi- cals oxidation. Hydroxyl radicals with high concentration are generated from O2 and H2O molecules activated with strong electric field ionization. The research results show that when the flue gas was at 65 ℃ and the volume con- centration ratio of -OH to SO2 was 4, the removal rate of SO2 reaches 83.40%. The desulfurization rate linearly de- creases with the increasing of gas temperature, and it decreases by 6% with the temperature increased by 10 ℃. When the flue gas flow increased from 0.6 to 2.4 m^3/h, the change of the desulfurization rate is no more than 1%. Therefore, a new method for removal of SO2 without absorbent and catalyst is found.

关 键 词：强电场电离放电 羟基自由基 烟气脱硫 影响因素 脱硫率 硫酸 

分 类 号：X701.3[环境科学与工程—环境工程]