O2＋、O3同时脱硫脱硝实验  

Simultaneous desulfurization and denitrification by O_2^+,O_3

作　　者：白敏菂[1] 毛首蕾[1] 朱玉鹏[1] 李超群[1] 

机构地区：[1]大连海事大学环境工程研究所,辽宁大连116026

出　　处：《中国环境科学》2014年第2期324-330,共7页China Environmental Science

基　　金：国家自然科学基金资助项目(61371027);交通运输部科技项目(2012-329-225-080);辽宁省科学研究一般项目(L2012449);大连市科技计划项目(2013E12SF067)

摘　　要：针对目前的烟气同时脱硫脱硝方法中存在的投资成本、运行费用、占地面积大等问题,研究强电离放电方法产生高浓度氧活性粒子(O2+、O3)注入烟气外排管道中,进行O2+、O3消除烟气中的NO,SO2转化成HNO3,H2SO4的等离子化学反应.描述强电离介质阻挡放电制取O2+、O3原理和烟道中O2+与H2O反应形成·OH及其氧化脱硫脱硝反应机制,分析回收酸液中的酸根离子种类及浓度.在O2+、O3与NO+SO2的物质的量比为5,烟气温度为65℃,H2O体积浓度为10%,停留时间为1s的实验条件下,脱硝脱硫率分别为97.4%,83.2%.In order to solve the disadvantage of high investment and operating costs, and large occupied area in conventional technology of simultaneous flue gas desulfurization and denitrification, reactive oxygen species （02＊ and 03） produced by a strong ionization dielectric barrier discharge were injected into the emission duct. In the plasma reaction duct, 02＋ and 03 oxidized NO to HNO3, and SOa to H2SO4. The principle for O2＋ and 03 produced was discussed. The mechanisms for -OH radical generated from 02＋ reacting with H20, and simultaneous flue gas desulfurization and denitrification by ＇OH radicals were introduced. The composition of the recovered acid liquid was analyzed. Removal rates of 97.4% for NO, and 83.2 % for SO2 were obtained under the following optimal experimental conditions： the molar ratio of reactive oxygen species （O2, 03） to SO2 and NO was five; the inlet flue gas temperature was 65 ~C; the H：O volume fraction was 10%, and the reaction time was ls.

关 键 词：脱硫脱硝 氧活性粒子 ·OH 强电离介质阻挡放电 脱硫脱硝率 

分 类 号：X703.5[环境科学与工程—环境工程]