化工学报2011，Vol.62Issue(10)：2791-2796,6.DOI:10.3969/j.issn.0438-1157.2011.10.017
膜鼓气/吸收法连续脱溴过程
Continuous bromine extraction with membrane air-blowing/absorption
摘要
Abstract
For developing a new energy-efficient technology for bromine extraction, a continuous bromine extraction with membrane air-blowing/absorption (MA-B/A) was designed, in which hydrophobic polyvinylidene fluoride (PVDF) hollow fiber membranes were used as aeration configurations. The compressed air was blown out of the aeration configurations (U-type PVDF membrane modules) in the form of small air bubbles, and entered the membrane modules connected in series separately. Convective mass transfer occurred between small air bubbles and the liquid (simulated sea water), and continuous bromine extraction for the liquid was carried out. The effects of operation conditions, such as the stage number, packing density, flow rate of liquid, air-blowing intensity and the length of air-blowing membrane module, on bromine removal rate were investigated. The optimal parameters of continuous bromine extraction with MA-B/A for 3-stage air-blowing membrane modules were obtained. The experimental results show that the bromine removal rate reaches 82% when the packing density is 13. 4%, the length is 1 m, the flow rate of feed is 0. 5 L ? H-1, and the air-blowing intensity is 7200 mol ? M-2 ? H-1. Scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) analysis show that strong oxidizing bromine has little effect on the performance of PVDF hydrophobic hollow fiber membranes.关键词
膜鼓气/膜吸收/聚偏氟乙烯/中空纤维疏水膜/连续脱溴分类
化学化工引用本文复制引用
高启君,吴丹,武春瑞,陈华艳,贾悦,王暄,吕晓龙..膜鼓气/吸收法连续脱溴过程[J].化工学报,2011,62(10):2791-2796,6.基金项目
天津市重点基金项目(09JCZDJC26300). （09JCZDJC26300）
