一种新的湿法脱硫强制氧化技术

强制氧化是防止湿法脱硫系统结垢和堵塞以及脱硫废渣二次污染问题的关键。文中提出将射流曝气技术应用于石灰石／石膏湿法脱硫的强制氧化工艺，并利用双膜理论针对射流曝气强制氧化工艺的气液相际传质特点进行了理论分析，结果表明，射流曝气器作为一种气液两相介质化学反应传质混合设备，充分利用强烈混合作用，提高了能量的综合利用率，对某湿法脱硫工程能耗的计算结果表明：采用射流曝气方式能耗节省达20％以上，脱硫成本降低，有利于实现关键脱硫设备的国产化。

New Technology of Forced Oxidation for a Wet Flue-gas Desulfurization System

Forced oxidation plays a key role in the prevention of agglomeration and blockage in a wet flue-gas desulfurization (WFGD) system and the reduction of secondary pollution caused by desulfurization waste dregs. A jet-flow aeration technique is proposed for use in the forced oxidation process of limestone gypsum WFGD system. Moreover, a theoretical analysis is conducted of the gas liquid interphase mass-transfer features of the jet-flow aeration forced-oxidation process by the use of a dual film theory. The results of the analysis indicate that a jet-flow aerator as a kind of mixing device for the chemical reaction mass-transfer of gas liquid two-phase media can give full play to its intensive mixing action, thus enhancing energy comprehensive utilization rate. The calculation results of the energy consumption of a WFGD project show that the adoption of the jet-flow aeration mode has resulted in energy-savings of more than 20%. The reduction of desulfurization cost is conducive to promoting the domestic manufacture of key desulfurization equipment.