膜吸收法浓海水烟气脱硫试验研究

Study of concentrated seawater flue gas desulphurization by membrane absorption

采用疏水性聚丙烯中空纤维膜制成膜接触器,以海水循环冷却系统排放的浓海水和与其pH值相同的原海水分别作为吸收液,考察吸收液流量、烟气流量、烟气浓度、气液相压力差等因素对脱硫率的影响.结果表明:与原海水作吸收剂相比,浓海水吸收SO2缓冲能力更大,脱硫效率更高.在操作方式相同,吸收液流量为10 L/h,烟气流量1 000 L/h的条件下,浓海水的脱硫率是原海水的2倍.在高盐度、高碱度、高浊度的浓海水介质条件下,膜接触器性能稳定,具备潜在工业化应用前景.

Removal of S（）2 from simulated flue gas was studied in a hydrophobie polypropylene hollow fiber contactor, using concentrated seawater and seawater as absorbents. The effects of various factors such as flux of absorbents, flux and concentration of gas mixtures, pressure drop between gas and liquid on desul furizing efficiency were investigated. The results showed that concentrated seawater has a large capacity and high efficiency rate of desulphurization compared to seawater. The desulfurizing efficiency with concentrated seawater was twice as seawater at the same condition（absorbents flux 10 L/h ,gas flux 1 000 L/ h）. Membrane contactor can maintain the repeated operation steadily with high salinity, alkalinity and high turbidity concentrated seawater, and have some industrialized application prospect.