Pilot-Scale Experiment for Simultaneous Dioxin and NO_x Removal from Garbage Incinerator Emissions Using the Pulse Corona Induced Plasma Chemical Process

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• 作者：Keiichiro Yoshida ; Toshiaki Yamamoto ; Tomoyuki Kuroki and Masaaki Okubo
• 关键词：Nonthermal plasma ; Flue gas ; Garbage incinerator ; Dioxins ; NO x ; High voltage pulse ; Chemical scrubber ; Sodium sulfite
• 刊名：Plasma Chemistry and Plasma Processing
• 出版年：2009
• 出版时间：October, 2009
• 年：2009
• 卷：29
• 期：5
• 页码：373-386
• 全文大小：514.0 KB

文摘

A pilot-scale pulse corona induced plasma chemical process (PPCP) reactor for controlling gas-phase dioxins and NO _x simultaneously is installed in a garbage incineration plant. The flow rate of the sampled flue gas is 5,000 Nm3/h (N: standard state) in maximum at the PPCP reactor, which consists of 22 wire-cylinder electrodes and is energized by a 50 kW nanosecond pulse high voltage generator. With an applied plasma energy density of 2.9–6.1 Wh/Nm3, the decomposition efficiency for dioxins is 75–84 % based on TEQ (toxic equivalents); the conversion efficiency of NO to NO₂ is ~93 % at maximum. The flue gas treated by the PPCP reactor is introduced at a rate of 50 Nm3/h to a wet-type chemical reactor, which uses an aqueous solution of sodium sulfite (Na₂SO₃). More than 90 % of NO _x is reduced to nitrogen, with negligible byproducts such as NO₂ − or NO₃ − ions left in the solution.