膜科学与技术

海水烟气脱硫膜吸收单元及工艺研究

作者：陈颖，关毅鹏，张召才，郭春刚，刘国昌，李晓明

单位：国家海洋局天津海水淡化与综合利用研究所

关键词：中空纤维膜;膜接触器;海水烟气脱硫;膜吸收

出版年,卷(期):页码： 2011,31(5):58-64

摘要：

以海水作为吸收剂,采用自行研制的中空纤维管式膜接触器作为吸收单元,进行膜吸收法海水烟气脱硫过程模拟试验研究.主要考察膜接触器结构、膜填充密度、膜吸收单元工艺方式、模拟烟气SO2浓度、温度、气液流量等因素对脱硫效率的影响.结果表明:提高烟气温度、海水流量、膜接触器内气液分布均匀程度、气液相有效接触面积,增加膜吸收级数,均有利于提高脱硫率;烟气流量及SO2浓度的增大不利于SO2的脱除;烟气流经管程的气液流程方式利于提高脱硫率,但是气阻大,进气压力高,工程化应用难以实现.提高膜材料传质特性和优化设计膜接触器结构是提高膜吸收法烟气脱硫效率的根本途径.

A comprehensive investigation of flue gas desulfurization was carried out by hydrophobic polypropylene hollow fiber membrane contactor with seawater as absorbent. The effect of various factors, such as membrane packing density, flow path of gas and fluid, concentration of SO2, gas temperature, configuration and connecting form of membrane contactors on desulfurization efficiency were studied. It is beneficial to absorption efficiency of SO2, with the increase of flue gas temperature, seawater flux, the contacting area between gas and seawater, stage numbers of membrane contactors, as well as the distribution degree of uniformity of gas and liquid in the membrane contactor. The absorption process could be enhanced when the flue gas was fed into the lumen side of the membrane module, whereas the gas pressure was too high for the pracrtical utilization. The module configuration plays an important role in improving the mass transferring. The development of new module of membrane contactor and membrane structure/materials for improving mass transferring would be fundamental factor to increase the absorption efficiency.

陈颖(1960-),女,吉林长春人,学士,教授级高工,从事膜技术研发及应用.E-mail:chy786@tom.com

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