膜科学与技术

聚醚砜中空纤维膜接触器脱硫性能研究

作者：马玉慧¹，²，叶卉¹，²＊，张玉忠¹，²＊，李泓¹，²，陈颖³

单位： 1.天津工业大学材料科学与工程学院，天津 300387； 2.天津工业大学省部共建分离膜与膜过程国家重点实验室，天津，300387； 3.国家海洋局天津海水淡化与综合利用研究所，天津 300192

关键词：聚醚砜；膜接触器；膜润湿；脱硫

出版年,卷(期):页码： 2016,36(5):60-67

摘要：

工业排放烟气中SO2是空气污染物之一，它是形成酸雨与PM2.5主要原因．本文对聚醚砜中空纤维膜接触器的脱硫性能进行了研究．以NaOH溶液为吸收剂，考察了烟气浓度、气液压差、组件长度以及组件级数、组件填充密度等因素对PES中空纤维膜脱硫性能的影响；连续试验考察膜的耐久性和稳定性，同时研究膜润湿对传质性能的影响．结果表明，提高组件级数、组件长度以及吸收液流量均可以提高中空纤维膜的脱硫率；PES膜吸收通量随SO2进气浓度与吸收液流量增加而变大．在连续试验中，由于膜润湿使得运行390min后吸收通量降低42%，390min后吸收通量能够维持在2.8×10-4mol/m2s．依据膜润湿对总传质阻力影响的模型，膜相传质阻力为吸收过程中主要的传质阻力，膜相传质阻力占总传质阻力的73%．

As one of the air pollutants，SO2 is the main cause of acid rain and PM2.5. Itnot only destroyed the ecosystem balance，but also affected the respiratory system and lung function. In this paper,PES hollow fiber membrane contactor was studied for the SO2 removal and absorption. The effects ofSO2 concentration,pressure differential, length of the membrane fiber, packing density and other factors on SO2 absorption performancewere investigated usingNaOH solution. And mass transfer performance of membrane contactor was also studied. The durable and stability of membrane contactor has been proved by long-term experiment. The effect of membrane wetting on membrane transfer mass was also been discussed. The results showed that when the stages of membrane contact, the length of membrane fiber, and absorption liquid flowrate increased, SO2 removal efficiency would increase. And SO2absorption fluxincreased as SO2 inlet concentration and liquid flow rate increased.The results of a long-term experiment indicated that SO2absorption flux dropped by 42% during the initial 10h because of membrane wetting.Then the absorption flux maintained at 2.8 × 10-4mol/m2s and unchanged after 390min.Based on the model of membrane wetting effect on total mass transfer resistance, membrane mass transfer resistance would be the main mass transfer resistance in the process of absorption, which accounted for 73% of the overall mass transfer resistance.

第一作者简介：马玉慧（1989-），女，湖北荆门人，硕士生，从事膜材料研究．E-mail：mayuhuihui@163.com ＊通讯作者，叶卉， E-mail：qianye325326@163.com；张玉忠， E-mail：zhangyz2004cn@163.com

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