提升工艺控制膜污染及其优化研究

发布时间：2018-01-26 02:02

本文关键词： 提升工艺膜污染响应曲面法工艺参数优化　出处：《膜科学与技术》2017年05期 　论文类型：期刊论文

【摘要】：提出一种非曝气浸没式膜分离工艺.在膜过滤过程中,通过电机对膜组件的牵引,使膜组件在水体里移动,从而在膜丝表面之间、膜丝表面与水体之间产生摩擦,控制膜污染.运行提升工艺过滤污染模拟液,并在单因素实验的基础上,设计响应曲面实验,优化提升工艺参数.以最终跨膜压差为响应值,研究提升工艺膜丝纵向位移量、膜丝弯曲量、膜丝提升速度及组件横向位移量4个影响因素及其交互作用对跨膜压差的影响.结果表明,提升工艺最优工艺参数为:膜丝纵向位移量18cm、膜丝弯曲量10cm、膜丝提升速度10cm/s、组件横向位移量140mm,在此参数下运行提升工艺的跨膜压差为18.90kPa,说明提升工艺可以控制膜污染,是一种可行的浸没式膜分离工艺.
[Abstract]:An unaerated submerged membrane separation process is proposed. In the process of membrane filtration, the membrane assembly is moved in the water through the traction of the motor to the membrane assembly, thus moving between the surface of the membrane wire. Friction between the surface of the membrane and the water is produced to control the membrane fouling. The simulated solution is filtered by running the lifting process and the response surface experiment is designed on the basis of the single factor experiment. With the final transmembrane pressure difference as the response value, the longitudinal displacement and bending of the riser membrane wire were studied. The effects of four factors, such as the lifting speed and the transverse displacement of the component, on the transmembrane pressure difference were studied. The results showed that the optimal technological parameters of the lifting process were as follows: the longitudinal displacement of the membrane wire was 18cm. The bending amount of the membrane wire is 10 cm, the lifting speed of the membrane wire is 10 cm / s, the lateral displacement of the module is 140 mm, and the transmembrane pressure difference of the lifting process is 18.90 KPA under this parameter. It shows that the lifting process can control membrane fouling and is a feasible submerged membrane separation process.
【作者单位】：环境与化学工程学院省部共建分离膜与膜过程国家重点实验室生物化工研究所天津工业大学;
【基金】：国家自然科学基金(21576210) 长江学者和创新团队发展计划(IRT13084)
【分类号】：TQ028.8
【正文快照】： 浸没式多孔膜分离工艺具有结构紧凑、占地面积小、处理效率高等优点,应用前景广阔.但是,膜污染问题和相对较高的能耗问题是阻碍其广泛应用的两大瓶颈,而膜污染问题更是首当其冲[1-3].在现有的膜污染控制方法研究中,利用曝气产生流体剪切力以减轻膜污染是一类有效的措施,但很难

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