乳状液膜技术用于海水-石灰石湿法烟气脱硫

Seawater-limestone wet flue gas desulfurization by emulsion liquid membrane

采用煤油为膜溶剂、兰-113B为表面活性剂、饱和石灰石水溶液为内相液、海水为外相液的乳状液膜体系进行了烟气脱硫的实验研究．探讨了表面活性剂用量、油内体积比、乳水体积比等因素对脱硫效率的影响以及乳状液的回收再利用．最佳的操作条件为：表面活性剂兰-113B的用量为3％，油内体积比为5：5，乳水体积比为1：5，进气S02浓度约为2300mg／m2，气体流速为500mL／min，脱硫的搅拌速度为150-250r／min，脱硫时间为40min．破乳后的油相液可以重复用于制乳，在最佳条件下烟气脱硫效率可达到98％以上．

Flue gas desulfurization was studied by using the technique of emulsion liquid membrane, which was composed of seawater as desulfurizer, kerosene as membrane solvent, L-113B as surfactant, and Ca（OH ）2 solution as internal phase. The desulfurization efficiency of absorbing solution was investigated for the concentration of L113B, volume ratio of oilphase tointernal phaseand the volume ratio of emulsion to external phase. The optimum conditions are as follows, the concentration of surfactant L-113B is 3%, volume ratio of oil phase to internal phase is 5 ： 5,the volume ratio of emulsion to external phase is 1 ： 5, the concentration of SO2 in flue gas is 2 300 mg/m3 ,the gas flow rate is 500 mL/min,mixing speed is 150-- 250 r/min and the time is 40 min for desulfurization. The oil phase can be reused to make emulsion. The results showed that the efficiency of desulfurization was over 98 % under optimum conditions.