旋流板塔钠强化石灰石湿式烟气脱硫研究

向石灰石脱硫浆液中添加硫酸钠可提高脱硫率。以旋流板塔为吸收器,测定了钠强化石灰石湿式烟气脱硫过程的脱硫率、pH值等随脱硫反应时间的变化情况,对不同pH值范围内的石灰石溶解速率等进行了分析。在与工业操作温度相近的条件下,测定了不同塔板数时的脱硫率和塔压降,计算了平均单板效率。结果表明,增加塔板数,脱硫率提高,而平均单板效率减小,实验条件下,塔板数由1增加到4,液气比为4L／m^3时脱硫率由25．5％提高到48．6％,而平均单板效率则由25．5％下降到15．3％。得出了平均单板效率与塔板数之间的关系式。

Sodium-enhanced limestone wet FGD in rotating-stream tray scrubber

Adding sodium sulfate to limestone slurry can increase SO\-2 removal efficiency. In this paper, sodium\|enhanced limestone flue gas desulfurization(FGD) tests were conducted in rotating\|stream tray scrubber. Changes of SO\-2 removal efficiency and pH value with time were experimentally studied and, at different pH range, the dissolution rates of limestone etc. were analyzed. The effects of plate number on SO\-2 removal efficiency and pressure drop were investigated at temperature approximated to industrial operating value. The average plate efficiencies were calculated. According to the experimental results, increasing plate number could increase SO\-2 removal efficiency, but the average plate efficiency decreased. Under the experimental conditions, when the plate number was increased from 1 to 4, the removal efficiency was increased from 25\^5% to 48\^6% at the liquid\|to\|gas ratio of 4L/m\+3, but the average plate efficiency was decreased from 25\^5% to 15\^3%. The equation of the relation between the average plate efficiency and plate number was obtained.