Pilot-Scale Experiment for Simultaneous Dioxin and NOx Removal from Garbage Incinerator Emissions Using the Pulse Corona Induced Plasma Chemical Process |
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| Authors: | Keiichiro Yoshida Toshiaki Yamamoto Tomoyuki Kuroki Masaaki Okubo |
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| Affiliation: | (1) Department of Electrical and Electronic Systems Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan;(2) Department of Electrical and Electronics Engineering, Tokyo City University, 1-28-1 Tamatsutsumi, Setagaya-ku, Tokyo 158-8557, Japan;(3) Department of Mechanical Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Japan; |
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| Abstract: | 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. |
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