• 关键词：NaClO  湿法脱硝  同时脱硫脱硝  机理

• 基金项目：国家高技术研究发展计划项目(No.2007AA061701);教育部长江学者奖励计划(2009)

• 肖灵
• 1. 浙江大学环境工程研究所,杭州 310027; 2. 浙江省工业锅炉炉窑烟气污染控制工程技术研究中心,杭州 310027

• 程斌
• 浙江省工业锅炉炉窑烟气污染控制工程技术研究中心,杭州 310027

• 莫建松
• 浙江省工业锅炉炉窑烟气污染控制工程技术研究中心,杭州 310027

• 王海强
• 1. 浙江大学环境工程研究所,杭州 310027; 2. 浙江省工业锅炉炉窑烟气污染控制工程技术研究中心,杭州 310027

• 吴忠标
• 1. 浙江大学环境工程研究所,杭州 310027; 2. 浙江省工业锅炉炉窑烟气污染控制工程技术研究中心,杭州 310027

• 摘要：采用NaClO作氧化吸收剂,在鼓泡反应装置进行了湿法烟气脱硝实验研究,考察了NaClO、NO浓度、液相温度、气体流量、pH对脱硝效率的影响以及SO₂对同时脱硫脱硝效率的影响,并结合液相产物分析探讨了同时脱硫脱硝反应机理.研究结果表明,pH值是影响活性成分HClO存在形式的重要因素,同时也是影响氧化吸收的关键因素;在一定范围内,增加氧化剂浓度和NO浓度以及降低气相流量均可提高NO_x的去除率,但温度超过60℃不利于氧化吸收的进行;SO₂的加入促进了NO的氧化吸收,脱硝效率由43.24%提高到53.03%,脱硫率则接近100%.

• Abstract：Experiments on DeNO_x were conducted in a lab-scale bubbling reactor with NaClO as the oxidant and sorbent. We studied the main factors influencing NO conversion efficiency, and propose a reaction mechanism of simultaneous removal of NO and SO₂ by NaClO. The results indicated that initial pH was a significant factor in the denitrification process. The NO conversion efficiency was improved by increasing the NaClO concentration and the inlet NO concentration, while high solution temperature was not beneficial for the removal of NO. At pH 5.5, NaClO was an excellent scrubbing medium for the absorption of NO. The best absorption efficiency among the individual DeNO_x experiments was 43.24%. The results of the combined DeSO_x/DeNO_x experiments showed that SO₂ could improve the absorption of NO₂, and the best DeNO_x and DeSO_x efficiencies reached 53.03% and 100%, respectively. Thus, NaClO could be an excellent oxidant and sorbent for simultaneous removal of SO₂ and NO.

• Key words：NaClO  denitrification  simultaneous removal of SO₂ and NO_x  mechanism

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