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Sulfite oxidation in seawater flue gas desulfurization by a pulsed corona discharge process

机译:脉冲电晕放电工艺在海水烟气脱硫中的亚硫酸盐氧化

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For seawater flue gas desulfurization (SWFGD), oxidation of S(IV) to S(VI) in the effluent of the gas desulfurization (FGD) system is very critical for its industrial application, because the additional S(1V) results in high chemical oxygen demand (COD) value. This paper reports a novel pulsed corona discharge oxidation process to convert S(IV) to S(VI) by use of a cylindrical wetted-wall pulsed high voltage reactor. Several important parameters, including pH values, flow rate of the solution, voltage, electrode radius and the length of the plasma region, were investigated for S(IV) oxidation and energy efficiency (G) of the process. After discharge for 12 min, with the electrode radius of 8 mm, pH value of 3, flow rate of 40 L h~(-1), more than 95% of S(IV) was oxidized and the energy efficiency was about 5.8 x 10~(-9) mol J~(-1). Compared with the traditional air oxidation process, the plasma-induced oxidation is a promising and attractive technology for the SWFGD system.
机译:对于海水烟气脱硫(SWFGD),在气体脱硫(FGD)系统的废水中将S(IV)氧化为S(VI)对于其工业应用至关重要,因为额外的S(1V)会导致高化学需氧量(COD)值。本文报道了一种新颖的脉冲电晕放电氧化工艺,该工艺通过使用圆柱形湿壁脉冲高压电抗器将S(IV)转化为S(VI)。研究了S(IV)氧化和过程的能量效率(G)的几个重要参数,包括pH值,溶液流速,电压,电极半径和等离子体区域的长度。放电12分钟后,电极半径为8 mm,pH值为3,流速为40 L h〜(-1),氧化了95%以上的S(IV),能量效率约为5.8 x 10〜(-9)摩尔J〜(-1)。与传统的空气氧化工艺相比,等离子体诱导的氧化对于SWFGD系统是一种有前途的诱人技术。

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