膜曝气-吸收耦合式海水烟气脱硫过程  

Seawater flue gas desulfurization by membrane aeration-membrane absorbent combined process

作　　者：邓梦轩 刘杰 杨超鹏[1,2,3] 袁俊生 DENG Mengxuan;LIU Jie;YANG Chaopeng;YUAN Junsheng(School of Chemical Engineering,Hebei University of Technology,Tianjin 300130,China;Engineering Research Centerof Seawater Utilization of Ministry of Education,Tianjin 300130,China;Modern Marine Chemical Collaborative InnovationCenter of Hebei Province,Tianjin 300130,China)

机构地区：[1]河北工业大学化工学院,天津300130 [2]海水资源高效利用化工技术教育部工程研究中心,天津300130 [3]河北省现代海洋化工协同创新中心,天津300130

出　　处：《化工进展》2019年第8期3902-3909,共8页Chemical Industry and Engineering Progress

基　　金：河北省重点研发计划(18394008D);河北工业大学优秀青年创新基金项目(201301)

摘　　要：利用聚丙烯中空纤维双层曝气式膜接触器,对膜曝气-膜吸收耦合式海水烟气脱硫过程开展实验研究,考察了烟气流量、海水流量、海水pH以及曝气量等因素对烟气脱硫参数的影响。结果表明,曝气式膜吸收过程具有更高的脱硫效率和传质性能,相较于非曝气过程,SO2吸收率可提高12.4%。提高烟气流量,使SO2吸收率降低,总传质系数先增大再减小;提高吸收剂流量、pH和曝气量,SO2吸收率和总传质系数均会提高,海水pH较高条件下加入曝气更能有效加强吸收效果;烟气中SO2的吸收通量均随海水pH和曝气量的增加而增加。扫描电镜及接触角测量显示在使用一个月后的膜丝仍具有较高的疏水性能和使用性能。A membrane aeration-absorption combined flue gas desulfurization process was investigated using polypropylene hollow fiber dual-layer membrane contactor. The influences of flue gas flow rate,seawater flow rate, seawater pH and aeration flow rate on SO2 absorption were investigated. The results show that higher desulfurization efficiency and mass transfer performance are achieved in the novel membrane aeration-absorption process, in which SO2 absorption rate increases by 12.4% comparing to normal one. The flue gas flow rate increases induce to SO2 absorption rate decreases, while total mass transfer coefficient increases first and then decreases. Increasing of seawater flow rate, seawater pH and aeration rate result in SO2 absorption rate and total mass transfer coefficient increase. Aeration with higher seawater pH presents better absorption effect. Higher seawater pH and bigger aeration rate lead to larger absorbed flux. The characterization of SEM and contact angle show that the hollow fiber membrane still has high hydrophobic properties and usability after one month, which shows a good application prospects of polypropylene(PP) hollow fiber membranes.

关 键 词：吸收 膜曝气 膜接触器 烟气脱硫 中空纤维膜 海水 

分 类 号：TQ028.8[化学工程]