| 气相组分对氨吸收同步脱除模拟烟气SO2 和NOx 的影响 |
| 摘要点击 1631 全文点击 1062 投稿时间：2012-04-05 修订日期：2012-05-09 |
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| 中文关键词 气相组成 亚硫酸铵 吸收 烟气 SO2 NOx 氧化抑制剂 |
| 英文关键词 gaseous composition ammonium sulfite absorption flue gas SO2 NOx oxidation inhibitor |
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| 中文摘要 |
| 在pH值5.9~6.1,吸收液浓度≥1 mol·L-1的条件下,分析了模拟烟气的NOx氧化度、O2和SO2浓度,以及添加液相S(Ⅳ)氧化抑制剂Na2S2O3对SO2、NOx吸收脱除效率的影响. 结果表明,氨可高效吸收脱除SO2和NO2,但对NO的吸收脱除效率几乎为0,因此,NO氧化是其吸收脱除NOx的前提. 吸收液S(Ⅳ)浓度是影响NO2脱除效率的关键因素,气相O2浓度越高或SO2浓度越低,吸收液S(Ⅳ)浓度降低越快,继而使NO2吸收脱除效率降低越快. 通过添加S(Ⅳ)氧化抑制剂S2O32-到吸收液,可在一定程度上抑制其氧化,从而延缓NO2吸收脱除效率的降低. |
| 英文摘要 |
| The effects of NOx oxidation ratio, O2 and SO2 concentrations in simulated flue gas as well as addition of S(Ⅳ) oxidation inhibitor NaS2O3 on the simultaneous removal of SO2 and NOx by ammonia absorption were investigated under the conditions of pH 5.9-6.1 and aqueous S(Ⅳ) concentration ≥1.0 mol·L-1. The research results showed that NO2 could be effectively absorbed by ammonium sulfite, but the NO absorption was negligible. Therefore, NO oxidation is the premise of NOx removal. Aqueous S(Ⅳ) concentration is a key factor affecting NO2 absorption removal, the higher the O2 concentration or the lower the SO2 concentration, the faster the aaqueous S(Ⅳ) concentration decreased, which resulted in a faster decrease of NO2 removal efficiency. S(Ⅳ) oxidation was inhibited to some extent by the addition of oxidation inhibitor S2O32- into the absorption solution. As a result, the decrease of NO2 removal efficiency became slower. |
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