| 脉冲电晕放电脱硫产物研究 |
| 摘要点击 1798 全文点击 2258 投稿时间：1998-11-13 |
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| 中文关键词 脉冲电晕放电 烟气脱硫 自由基 等离子体 |
| 英文关键词 pulse corona discharge desulphurization radicals plasma |
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| 中文摘要 |
| 模拟烟气的脉冲放电等离子体活化法脱除SO2产物分析结果表明:在温度60℃～70℃,氨硫化学计量比为1:1条件下,(NH4)2SO4含量占脉冲放电脱硫产物含量的80%以上;50%左右的产物吸附于反应器内,其余部分随着尾气排出;提高电压有利于正盐的生成;尾气与反应器中(NH4)2SO4比值也随之增大。测定了不同温度下(NH4)2SO3的化学平衡常数,得出在氨硫化学计量比1:1,温度60℃～70℃的脉冲烟气脱硫条件下,均相的尾气中不存在亚硫酸盐产物。证实了在多相的胶体反应气中,SO2首先与NH3等结合生成HSO3-,后经过链反应机制被脱除是脉冲脱硫的主要氧化途径;SO2以分子形式直接被自由基氧化不是脉冲脱硫的主要途径。 |
| 英文摘要 |
| The removal of SO2 from simulated gas is experimentally and theoretically investigated using pulse discharge.By tests on its products,the results show that under the experimental conditions(temperature 60℃～70℃;chemically reactive ratio of NH3 to SO2:1:1),ammonium sulfate content of products is over 80%;fifty percent of products is deposited inside discharge chamber,and the rest runs out of discharge chamber,suspending among gases.The percentage of ammonium sulfate increases with the rising of voltage and quantitative ratio of ammonium sulfate deposited inside discharge chamber to that among the rest gases also increases.The conclusion that product of ammonium sulfite doesn't exit among the rest gases has been drawn by examining its thermochemical equilibrium.The following conclusions have been also drawn:The main reaction mechanism of plused corona discharge desulfurization from flue ges is that HSO3-,which is formed from reaction of NH3 and SO2,is oxidized through linereaction mechanism;the mechanism that SO2 is oxidized directly by radicals is not major. |
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