摘要
对中空纤维膜接触器用于烟气脱硫的工艺进行了实验研究并建立了脱硫率计算模型。采用疏水性聚丙烯中空纤维膜组装膜组件,用SO2钢瓶气与空气配制模拟烟气,气相走中空纤维膜内侧,以Na2SO3溶液为吸收剂进行脱硫实验研究。实验结果表明,该脱硫工艺脱硫率高且稳定。当Na2SO3吸收液浓度大于5%,液相阻力可以忽略;脱硫率随气速的增大而减小,而随膜组件有效长度、膜传质系数的增大而增大。忽略液相传质阻力,用传质速率与物料衡算方法及传质经验关联式,建立微孔中空纤维膜接触器烟气脱硫率计算模型,模型计算值与实验值误差小于9.5%,模型能比较可靠地模拟烟气脱硫过程,通过该模型可以快捷计算脱硫率。
The technology of using microporous hollow fiber membrane contactor （HFMC） to desulfurize the flue gas was investigated experimentally, and the corresponding calculation model used for the calculation of the flue gas desulfurization ratio by HFMC was developed. In the experiments conducted, the Na2SO3 solution was used as absorbent and the flue gas flowing in the inner side of the hollow fiber membrane was simulated by mixing the SO2 with air. The experimental results show that the desulfurization ratio of using HFMC is high and stable, and the mass-transfer resistance on the liquid phase side can be neglected when the concentration of Na2SO3 in the absorbent is higher than 5%; the desulfurization ratio increases with increasing the length of the membrane module and the mass-transfer coefficient of the membrane, decreases with the increase of the flue gas velocity. Based on neglecting the mass-transfer resistance of liquid phase, the desulfurization ratio calculation model for HFMC was established via the calculations of material balance and mass-transfer rate calculated by using the empirical correlative equation of mass-transfer. The results show that the established model can simulate the flue gas desulfuration process rather reliably; using it to calculate the desulfurization ratio of flue gas by HFMC is easy and convenient, and the differences between the calculation results and the experimental data are within 9.5%.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2010年第1期144-149,共6页
Journal of Chemical Engineering of Chinese Universities
基金
江苏省自然科学基金资助项目(BK2002105)
关键词
烟气
脱硫
中空纤维膜
膜吸收
数学模型
fuel gas
desulfurization
hollow fibermembrane
membrane absorption
mathematical model
