Study on the removal of SO2 from simulated flue gas using dry calcium-spray with DBD plasma
Yi, CW; Wu, CD; Chen, ZG; Ou, HX; Shao, XJ
Wu, CD, Univ Jiangsu, Sch Environm, Zhenjiang 212013, Peoples R China.
Title: Study on the removal of SO2 from simulated flue gas using dry calcium-spray with DBD plasma|plasma; strong ionization discharge; Ca(OH)(2); SO2; removal of SO2. Abstract:In this study, lime-hydrate (Ca(OH)(2)) desulfurizer was treated by plasma with strong ionization discharge of a dielectric barrier. The removal of SO2 from simulated. ue gas was investigated. The principles of SO2 removal are discussed. Several factors a. ecting the e. ciency of SO2 removal were studied. They included the ratio of calcium to sulfur (Ca/S), desulfurizer granularity, residence time of the. ue gas, voltage applied to the discharge electrode in the plasma generator, and energy consumption. Experimental results indicate that the increase in Ca/S ratio, the applied voltage and discharge power, the residence time, and the reduction in the desulfurizer granularity all can raise the SO2 removal e. ciency. The SO2 removal e. ciency was up to 91.3% under the following conditions, namely a primary concentration of SO2 of 2262 x 10(-6) (v/v) in the emission gas, 21%(v/v) of oxygen, 1.8%(v/v) of water, a Ca/S ratio of 1.48, a residence time of 2.8 s, a 3.4 kV voltage and a 10 kHz frequency power applied to the discharge electrodes in the plasma generator, and a. ow rate of 100 m(3)/h for emission gas.. Journal name:PLASMA SCI TECHNOL
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