采用石灰浆液荷电雾化的脱硫机理试验研究

Experimental Study on the Mechanism of Flue Gas Desulfurization by Electrically Charged Lime Slurry Droplets

采用环形电极、机械雾化喷嘴等组成的荷电雾化装置,通过测试石灰浆液的荷质比、喷浆脱硫前后烟气中二氧化硫浓度的变化,探讨和分析了不同流量时的荷质比变化规律,首次对不同荷电电压、荷质比与脱硫效率的关系进行研究。结果表明:雾滴的荷电效果与浆液流量有关,且对于同一喷嘴存在荷电效果最佳的流量值;在相同钙硫比条件下,浆液荷电相对于非荷电时脱硫率明显提高;在不同钙硫比情况下,浆液荷电与非荷电的脱硫率变化趋势基本相同。

Employing an electrofying atomizing appliance, which consists of a ring-shaped electrode and a mechanically atomizing nozzle, the variations of charge to mass ratio under different mass flow conditions has been studied by charge to mass ratio measurements, and by determining concentration changes of sulfur dieoxide in the flue gas, before, and following slurry spraying for desulfurization. It＇s the first time that the relationship between charge to mass ratio and desulfurzation efficiency, for different electric potentials, has been studied. Results indicate that the effect of charging the droplets depends on the sturry＇ s flow volume; moreover each noszzle has its optimal flow for obtaining the best electrical charge effect. With constant Ca/S ratio, desulfurization efficiency increases remarkably by electrically charging the slurry; which is also basically true for varying Ca/S rations.